BRAKING SYSTEM
FIELD OF TECHNOLOGY
[0001] The present invention relates to a-combined braking system of a motorized vehicle.
BACKGROUND
[0002]. Conventionally in two wheeled vehicles, braking operation of front wheel is actuated
by application of force on a front wheel brake actuating means generally provided on a
handlebar, and the braking operation of rear wheel is actuated by application of force on a rear
wheel brake actuating means. The rear wheel brake actuating means is provided either on the
handlebar or on a foot pedal. The operation of the front and the rear wheel braking is normally
controlled, bythe operator, independently and somet;imes simultaneously.
[0003] It is always desirable to enhance safety ofthe users while applying the front and rear
braking of the two:-wheeled vehicles. Hence, for the safe braking of front and rear wheels of the
two-wheeled vehicle, such techniques are needed that are capable of providing an effective
actuation of front and rear wheel brakes during usage of the two-wheeled vehicle.
SUMMARY
[0004] A braking system comprises a first wheel braking device, a second wheel braking
devices, a first brake actuating means, a second brake actuating means and a cylinder assembly.
The first wheel braking device is configured to apply brake on a first wheel of a two wheeled
vehicle and the second wheel braking device is configured to apply brake on a second wheel of
the two wheeled vehicle. The cylinder assembly is operatively connected to the first brake
actuating means and the second brake actuating means and comprises a first hydraulic chamber,
a second hydraulic chamber, a first piston and a second piston. The first hydraulic chamber and
the second hydraulic chamber are separated by a floating wall. The first hydraulic chamber is
hydraulically connected to the first wheel braking device via a first wheel connecting means and
the second hydraulic chamber is hydraulically connected to the second wheel braking device via
a second wheel connecting means. The first piston is operatively coupled with the first brake
actuating means and configured to reciprocate within the first hydraulic chamber. The second
piston is operatively coupled with the second brake actuating means and configured to
reciprocate within the first hydraulic chamber. An actuation of the first brake actuating means
causes a movement of the first piston in the first hydraulic chamber thereby applying a hydraulic
pressure at the first wheel braking device via the first wheel connecting means for actuating the
first wheel braking device. Further, the movement of the first piston also causes a movement of
the floating wall in the second hydraulic chamber thereby applying a first hydraulic pressure at
the second wheel braking ·device via the second wheel connecting means for actuating the second
wheel braking device. An actuation of the second brake actuating means causes a movement of
the second piston in the second hydraulic chamber thereby applying a second hydraulic pressure
at the second wheel braking device via the second wheel connecting means for actuating the
second wheel braking device. Moreover, upon the actuation of the second brake actuating means,
a movement of the floating wall is restricted against one or more stoppers at an offset distance
from the first wheel connecting means thereby preCluding a movement of fluid to the first wheel
braking device via the first wheel connecting means.
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[0005] In an embodiment, the braking system further comprises a first set of elastic blockers
and a second set of elastic blockers. The first set of elastic blockers is configured to restrict the
movement of the floating wall in the first hydraulic chamber at a first offset distance from the
first wheel connecting means. The second set of elastic blockers is configured to restrict. the
movement of the floating wall in the second hydraulic chamber at a second offset distance from
the second wheel connecting means. The first set of elastic blockers and the second set of elastic
blockers are separated by the floating wall by a pre-defined distance.
. .
[0006] In an embodiment, the cylinder assembly further comprises a rigid wall and a
projection. The rigid wall between the first hydraulic chamber and the second hydraulic chamber
is positioned at a pre-determined distance from a default position of the floating wall. The rigid
wall comprises a recessed portion. The projection is having an end attached to an intermediate
portion, of the first piston and another end aligne,d .with _the recess.ed portion such that the ,.
projection is movable through the recessed portion. The movement of the first piston causes a
· movement ofthe projection through the recessed portion ofthe rigid wall to cause the movement
of the floating wall in the second hydraulic chamber thereby applying a third hydraulic pressure
at the second wheel braking device via the second wheel connecting means.
[0007] In an embodiment, the movement of the first piston in the first hydraulic chamber
causes a movement of fluid from the first hydraulic chamber to the first wheel connecting means
for applying the hydraulic pressure at the first wheel braking device, thereby causing the
actuation of the first wheel braking device. In an embodiment, the movement ofthe floating wall
in the second hydraulic chamber causes a movement of fluid from the first hydraulic chamber to
the second wheel connecting means for applying the first hydraulic pressure at the second wheel
braking device, thereby causing the actuation of the second wheel braking device. In an
embodiment, the movement of the second piston causes a movement of fluid from the second
hydraulic chamber to the second wheel connecting means for applying the second hydraulic
pressure at the second wheel braking device, thereby causing the actuation of the second wheel
braking device.
[0008] In another embodiment, a braking system comprises a first wheel braking device, a
second wheel braking device, a first brake actuating means, a second brake actuating means and
a cylinder assembly. The first wheel braking device is configured to apply brake on a first wheel
of a two wheeled vehicle and the second wheel braking device is configured to apply brake on a
second wheel of the two wheeled vehicle. The cylinder assembly is operatively connected to the
first brake actuating means and the second brake actuating means. The cylinder assembly
comprises a first hydraulic chamber, a second hydraulic chamber, a first check valve, a first
piston and a second piston. The first hydraulic chamber and the second hydraulic chamber are
separated by a wall. The first hydraulic chamber is hydraulically connected to the first wheel
braking device via a first wheel connecting ·means. The second hydraulic chamber is
hydraulically connected to the second wheel braking device via a second wheel connecting
means. ·The first check valve is interposed in a hydraulic line connecting the first hydraulic
chamber and the second hydraulic chamber. The first check valve is configured to facilitate
fluidic communication from the first hydraulic chamber to the second hydraulic chamber via the
hydraulic line. The first piston is operatively coupled with the first brake actuating means and is
configured to reciprocate within the first hydraulic chamber. The second piston is operatively
coupled with the second brake actuating means and is configured to reciprocate within the first
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hydraulic chamber. An actuation of the first brake actuating means causes a movement of the
first piston in the first hydraulic chamber thereby applying a hydraulic pressure at the first wheel
braking device via the first wheel connecting means for actuating the first wheel braking device.
Further, the movement of the first piston causes a movement of fluid from the first hydraulic
chamber to the second hydraulic chamber via the hydraulic line through the first check valve to
facilitate a movement of the second piston thereby applying a first hydraulic pressure at the
second wheel braking device via the second wheel connecting means for actuating the second
wheel braking device. An actuation of the second brake actuating means causes the movement of
the second piston in the second hydraulic chamber thereby applying a second hydraulic pressure
at the second wheel braking device for actuating the second wheel braking device.
[0009] In an embodiment, the braking system further comprises a second check valve. The
second check valve is configured to facilitate a movement of fluid from the second reservoir to
the first hydraulic chamber. Moreover, when the first brake actuating means returns to a default
po-sition from an actuated position, the second check valve enables the fluid entered into ·the
second hydraulic chamber from the first hydraulic chamber to return back to the first hydraulic
chamber. In an embodiment, the second check valve is a one-way ball valve configured to
facilitate the movement of the fluid from the second reservoir to the first hydraulic chamber.
[0010] In an embodiment, the first check valve is a pressure dependent safety valve
configured to control the movement of fluid from the first hydraulic chamber to the second
hydraulic chamber. In an embodiment, the first check valve is a one way valve configured to
facilitate the movement of fluid from the first hydraulic chamber to the second hydraulic
chamber. In an embodiment, the first check valve is connected with a stopping arrangement
configured to allow the movement of fluid from the first hydraulic chamber to the second
hydraulic chamber if the hydraulic pressure due to the movement of the first piston in the first
hydraulic chamber is greater than a threshold value.
[0011] In yet another embodiment, a braking system comprises a first wheel braking device,
a second wheel braking device, a first brake actuating means, a second brake actuating means
and a cylinder assembly. The first wheel braking device is configured to apply brake on a first
wheel of a two wheeled vehicle and the second wheel braking device is configured to apply
brake on a second wheel of the two wheeled vehicle. The cylinder assembly is operatively·
connected to the first·biiake·actuating means and the second brake actuating means. The cylinder
assembly comprises a'first·hydraulic chamber, a second hydraulic chamber, a first piston and a
second piston. The first•hydraulic chamber and the second hydraulic chamber are separated by a
wall. The first hydraulic·chamber is hydraulically connected to the first wheel braking device via
a first wheel connecting means and is hydraulically connected to the second wheel braking
device via a first rear'Wheet connecting means. The second hydraulic chamber is hydraulically
connected to the second wheel braking device via a second rear wheel connecting means. The
first piston is operatively coupled with the first brake actuating means and is configured to
reciprocate within the first hydraulic chamber. The second piston is operatively coupled with the
second brake actuating means and is configured to reciprocate within the first hydraulic chamber.
An actuation of the first brake actuating means causes a movement of the first piston in the first
hydraulic chamber thereby applying a hydraulic pressure at the first wheel braking device via the
first wheel connecting1means for actuating the first wheel braking device. Further, the movement
of the first piston applies a first hydraulic pressure at the second wheel braking device via the
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first rear wheel connecting means tor actuating the second wheel braking device. An actuation of
the second brake actuating means causes the movement of the second piston in the second
hydraulic chamber thereby applying a second hydraulic pressure at the second wheel braking
device via the second rear wheel connecting means for actuating the second wheel braking
device.
[0012] In an embodiment, each of the first wheel c<;>nnecting means and the second wheel
connecting means comprises one of a hydraulic line and a pneumatic line. In an embodiment,
each of the first brake actuating means and the second brake actuating means comprises one of a
brake lever and a brake pedal. In an embodiment, the braking system further comprises a first
reservoir and a second reservoir. The first reservoir is configured to be in fluidic communication
with the first hydraulic chamber and the second reservoir is configured to be in fluidic
communication with the second hydraulic chamber. . .
[0013] In an embodiment, the braking system further comprises a push rod and a push link.
The push rod is operatively coupled to the first piston and is connected to the first brake
actuating means via a first brake· actuating connecting means. The push link is operatively
coupled to the second piston and is connected to the second brake actuating means via a second
brake actuating connecting means. The actuation of the first brake actuating means causes the
first brake actuating connecting ineans to move the push rod attached to the first piston for the
movement of the first piston in the first hydraulic chamber. The actuation of the second brake
actuating means causes the second brake actuating connecting means to move the push link
attached to the second piston for the movement of the second piston in the second hydraulic
chamber. In an embodiment, each of the first brake actuating connecting means and the second
brake actuating connecting means comprises one of a cable or a wire.
[0014] In an embodiment, the actuation of the first brake actuating means causes the
actuation ofthe first wheel braking device and the second wheel braking devi~e simultaneously.
In another embodiment, the actuation of the first brake actuating means causes the actuation of
the first wheel braking device and causes the actuation of the second wheel braking device after a
pre-determined delay.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The invention itself, together with further features and attended advantages, will
become apparent from consideration of the following detailed description, taken in conjunction
with the accompanying drawings. One or more embodiments of the present invention are now
described, with reference to a two wheeled vehicle by way of example only wherein like
reference numerals represent like elements and in which:
(0016] Figure. I illustrates a block diagram of a braking system, according to a first
embodiment of the present invention;
[0017] Figure I A illustrates an enlarged view of a cylinder assembly of the braking system,
according to the first embodiment of the present invention;
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[0018] Figure 2A illustrates a graphical representation of change in braking pressure output
as applicable on respective master cylinders of first and second wheel braking devices of the
braking system,' according to the first embodiment of the present invention;
[0019] Figure 28 illustrates a graphical representation of change in torque 1applicable on
respective disc brakes of the first wheel braking device and the second wheel braking device
with time when the first wheel braking device and the second wheel braking device get actuated
upon actuation of a first brake actuating means, according to the first embodiment of the present
invention;
(0020] Figure 3 illustrates a block diagram of a braking system, according to a second
embodiment ofthe present invention;
(0021] Figure 3A illustrates an enlarged view of a 'cylinder assembly of the braking system,
according to the second embodiment of the present invention;
[0022] Figure 4A illustrates a graphical representation of change in braking pressure output
as applicable on respective master cylinders of·first and second wheel braking devices of the
braking system, according to the second embodiment ofthe present invention;
[0023] Figure 48 illustrates a graphical representation of change in torque applicable on
respective disc brakes of the first wheel braking device and the second wheel braking device
with time when the first wheel braking device and the second wheel braking device get actuated
upon actuation of a first brake actuating means, according to the second embodiment of the
present invention;
(0024] Figure 5 illustrates a block diagram of a braking system, according to a third
embodiment ofthe present invention;
(0025] Figure 5A illustrates an enlarged view of a cylinder assembly of the braking system,
according to the third embodiment of the present invention; .
(0026] Figure 6A illustrates a graphical representation of change in braking pressure output
as applicable on respective ma'ster cylinders of first and second wheel braking devices of the
braking system; ·according to the third embodiment of the present invention;
(0027] Figure 6B illustrates a graphical representation of change in torque applicable on
respective disc brakes of the first wheel braking device and the second wheel braking device
with time when the first wheel braking device and the second wheel braking device get actuated
upon actuation of a first brake actuating means, according to the third embodiment of the present
invention;
. (0028] Figure 7 illustrates a block diagram of a braking system, according to a fourth
embodiment of the present invention;
[0029] · Figure 7 A illustrates an enlarged view of a cylinder assembly of the braking system,
according to the fourth embodiment of the present invention;
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[0030] Figure 8A illustrates a graphical repres·entation of change in braking pressure output
as applicable on respective master cylinders of first and second wheel braking devices of the
braking system, according to the fourth embodiment ofthe present invention;
[0031) Figure 88 illustrates a graphical representation of change in torque applicable on
respective disc brakes of the first wheel braking device and the second wheel braking device
with time when the first wheel braking device and the second wheel braking device get actuated
upon actuation of a first brake actuating means, according to the fourth embodiment of the
present invention;
[0032] Figure 9 illustrates a block diagram of a braking system, according to a fifth
embodiment of the present invention;
[0033] Figure 9A illustrates an enlarged view of a cylinder assembly of the braking system,
according to the fifth embodiment of the present invention;
[0034] Figure lOA illustrates a graphical representation of change in braking pressure
output as applicable on respective master cylinders of first and second wheel braking devices of
the braking system according to the fifth embodiment of the present invention;
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[0035) Figure I 08 illustrates a graphical representation of change in torque applicable on
respective disc brakes of the first wheel braking device and the second wheel braking device
with time when the first wheel braking device and the second wheel braking device get actuated
upon actuation of a first brake actuating means, according to the fifth embodiment of the present
invention;
[0036] Figure II illustrates a block diagram of a braking system, according to a sixth
embodiment ofthe present invention;
[0037] Figure IIA illustrates an enlarged view of a cylinder assembly of the braking
system, according to the sixth embodiment of the present invention;
[0038] Figure 12A illustrates a graphical representation of change in braking pressure
output as applicable on respective master cylinders of first and second wheel braking devices of
the braking system, according to the sixth embodiment of the present invention; and
[0039] Figure 128 ·illustrates a graphical representation of change in torque applicable on
respective disc brakes of the first wheel braking device and the second wheel. braking device
with time when the first wheel braking device and the second wheel braking device -get actuated
upon actuation of a first brake actuating means, according to the sixth embodiment of the present
invention.
[0040] The drawings referred to in this description are not to be understood as being drawn
to scale ·except if specifically noted, and such drawings are only exemplary in nature.
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DETAILED DESCRIPTION
[0041] While the invention is susceptible to various modifications and alternative forms,
specific embodiments thereof have been shown·by way of examples in the drawings and will be
described in details below. It should be understood, however that it is not intended to limit the
invention to the particular forms disclosed, but on the contrary, the invention is to cover all
modifications, equivalents, and alternative falling within the spirit and the scope of the invention.
[0042] The terms "comprises", "-comprising", or any other variations thereof, are intended
to cover a non-exclusive inclusion, such that a ·setup, device; system or method that comprises a
list of components or steps does not include only those components or steps but may include
other components or steps not expressly listed or inherent to such setup or device or method. In
other words, one or more elements in a system or apparatus proceeded by "comprises ... a" does
not, without more constraints, preclude the existence of other elements or additional elements in
the system or apparatus.
[0043] In accordance with the present invention the drawbacks as stated hereinabove have
been overcome by providing a braking system for a two wheeled vehicle adapted to have the
feature of combined braking system for better safety of the rider of a vehicle.
[0044] It is to be noted that terms such as "two wheeled vehicle" and "vehicle" are
interchangeably used throughout the description. The term "two wheeled vehicle" includes
vehicles such as motorcycles, scooters, bicycles, mopeds, all terrain vehicles (A TV) and the like.
[0045] For the better understanding of this invention, reference would now be made to the
embodiments illustrated in greater depth in the accompanying figures and description here
below, further, in the following figures, the same reference numerals are used to identify the
same components in various views.
[0046] Various embodiments provide braking systems of two wheeled vehicles. A braking
system comprises at least one brake actuating means, a cylinder assembly connected to the at
least one brake actuating means by a first brake actuating connecting means and a second brake
actuating connecting means. The cylinder assembly is adapted to actuate at least one braking
device through at least one of a first wheel connecting means and a second wheel connecting
means, where the actuation of the cylinder assembly by the at least one brake actuating means
renders both the braking devices such as a first wheel braking device and a second wheel braking
device operative.
[0047] In an embodiment, the at least one. brake actuating means includes a first brake
actuating means and a second brake actuating means. Examples of each of the first brake
actuating means and the second brake actuating means can be either of a left side ·brake lever,
right side brake lever, a brake pedal and the like.
[0048] In an embodiment, the first wheel ~raking device and the second wheel braking
device are disc type braking devices. The first wheel braking device and the second wheel
braking device are connected to a first wheel and a second wheel of the two wheeled vehicle,
respectively. In an embodiment, the first brake ·actuating connecting means and the second brake
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actuating connecting means includes a cable, a wire and the like. In an embodiment, the first
wheel connecting means and the second wheel connecting means are of hydraulic or pneumatic
in nature.
[0049)' Some example embodiments of the configurations provided in the present disclosure
are provided herein by referring to Figures I to 12A-12B.
FIRST EMBODIMENT
[0050] In the first embodiment as depicted in Figure I, a braking system (0 I A) comprises
inter-alia, a first wheel braking device (08), a 'Second wheel braking device (09), a first brake
actuating means (02) such as brake lever mounted on the handlebar of a vehicle, a cylinder
assembly (05) mounted on a vehicle body frame thereof that is adapted with such mechanism
that keeps a first piston (32) and a second piston (21) biased to their default position, the second
brake actuating. means (03) such as brake pedal, first connecting means such as a first brake·
actuating connecting means (06A) in form of a. cable and a second brake actuating connecting
means (06B), and second connecting means such as a first wheel connecting means (07F) and a
second wheel connecting means (07R) that are hydraulic lines. The first wheel braking device
(08) and the second wheel braking device (09) are connected to a first wheel (04A) and a second
wheel (04B) of the two wheeled vehicle, respectively for application of braking thereof.
[0051) As illustrated in Figure lA, the cylinder assembly (05) is a multi stage master
cylinder comprising of a first hydraulic chamber (II) and a second hydraulic chamber (12)
separated by a floating wall (13F). The first hydraulic chamber (II) is provided with the first
piston (32). The first piston (32) is operatively coupled with the first brake actuating means (02)
for reciprocating within the first hydraulic chamber (II). In the example representations of
Figures I and I A, for operative coupling between the first piston (32) and the first brake
actuating means (02), the first piston (32) on its one side is connected to a push rod ( 17), and the
first piston (32) can be pushed upward (within the first hydraulic chamber (II)) upon the
actuation ofthe first brake actuating means (02). Upon such actuation ofthe first brake actuating
means (02), the first piston (32) moves against a spring force. The first hydraulic chamber (II) is
in communication with a first reservoir (14). Similarly, the second hydraulic chamber (12) is
provided with a second piston (2I ). The second piston (21) on its one side is connected to a push
link (24) and the second piston (21) can be pushed downward (within the second hydraulic
chamber (12)) upon actuation ofthe second brake actuating means (03), and upon such actuation,
the second piston (2I) moves against a spring force. The second hydraulic chamber ( I2) is in
communication with a second reservoir (15).
· [0052] The first brake actuating connecting means (06A) at its one end is connected to the
first brake actuating means (02) i.e. the brake lever and at its other end is connected to the push
rod ,(17). Similarly, the second brake connecting means (06B) at its one end is connected to the
second brake actuating means (03) i.e. the brake pedal and at its other end is connected to the
push link(24).
[0053] The first wheel connecting means (07F) and the second wheel connecting means
(07R) are hydraulic lines. The first wheel connecting means (07F) ·hydraulically connects the
first wheel braking device (08) with the first hydraulic ·chamber (1I). The second wheel_
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connecting means (07R) hydraulically connects the second wheel braking device (09) with the
second hydraulic chamber ( 12).
[0054) When the first actuating means (02) is operated, for example rotated clockwise as
indicated by arrow (A) in the Figure I, the push rod ( 17) moves anti clockwise as indicated by
arrow (B) and the first piston (32) is pressed upwards into the first hydraulic chamber (II)
against the spring force. The upward movement of the first piston (32) as indicated by arrow (C)
is configured to apply a hydraulic pressure at the first wheel braking device (08) through the first
wheel connecting means (07F) to actuate the first wheel braking device (08). Further, after a pred~
termined time pr.rind, thP. tl(l::~ting wall (13F) starts moving ,upward (e.g., in the gccond
hydraulic chamber (12)) under the influence of the movement of the first piston (32). As the
floating wall (13F) moves towards the second hydraulic chamber (12), a hydraulic pressure (e.g.,
a first hydraulic pressure) is applied at the second wheel braking device (09) via the second
wheel connecting means ·(07R) causing the second wheel braking device (09) to actuate.
Accordingly, upon actuation of the first' actuating means (02), both of the braking devices, for ·
example, the first wheel braking device (08) and the second wheel braking device (09) are
actuated.
[0055) When the second brake actuating means (03) is operated, for example, rotated
clockwise as indicated by arrow (D) in Figure I, the push link (24) moves anti-clockwise as
indicated by arrow (E) and the second piston (21) is pressed in downward direction into the
second hydraulic chamber (12) against the spring force. The floating wall (13F) doesn't move
beyond from its default position in the second hydraulic chamber (12) under the influence of
movement of the second piston (21) due to presence of one or more stoppers such as stoppers
(lOA) and (lOB). More specifically, the movement ofthe floating wall (13F) is restricted against
the stoppers (lOA) and (JOB) at an offset distance from an opening of the first wheel connecting
means (07F), thereby precluding a movement of fluid to the first wheel braking device (08) via
the first wheel connecting means (07F). It would be appreciated by those skilled in the art that
with stopping the movement of the floating wall (13F) just above the first wheel connecting
means (07F) any possible fluid passage from the first or second hydraulic chambers (II or 12) to
the first wheel connecting means (07F) is avoided. However, the downward movement of the
second'piston (21) as indicated by arrow (F) is configured to apply a hydraulic pressure (e.g.,
second hydraulic pressure) at the second wheel braking device (09) through the second wheel
connecting means (07R) to actuate the second wheel braking device (09). Hence, upon actuating
the second brake actuating means (03), only the second wheel braking device (09) is actuated
with no changes in the state of the first wheel braking device (08).
[0056) The actuation of the first wheel braking device (08) and the second wheel braking
device (09) upon the actuation of the first brake actuating means (02) occurs simultaneously or
with a pre-determined delay. Thus, actuation of the first brake actuating means (02) causes t-he
first wheel braking device (08) and the second wheel braking device (09) to work in interlocked
manner.
[0057]- It should be understood that the present embodiment can also be modified to actuate
· the first wheel braking device (08) and the second wheel braking device {09) upon the actuation
of the second brake actuating means (03).
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[0058] Figure 2A depicts a graphical representation of the change in braking pressure output
as applicable on respective master cylinders of the first wheel braking device (08) and the second
wheel braking device (09) with time when the first wheel braking device (08) and the second
wheel braking device (09) get actuated upon the actuation ofthe first brake actuating means (02).
For example, a plot 202 represents pressure variation against time in the first hydraulic chamber
(11) corresponding to the first wheel braking device (08) (shown as 'FRONT'), and a plot 204
represents pressure variation against time in the second hydraulic chamber ( 12) corresponding to
the second wheel braking device (09) (shown as 'REAR'). It is noted that upon actuation of the
first brake actuating means (02), the pressure is applied in the second hydraulic chamber ( 12)
after a pre-determined time delay (see, 'd') from a time of application of the pressure in the first
hydraulic chamber (11):
[0059] Similarly, Figure 2B depicts a graphical .representation of change in torque
applicable on the respective disc brakes of the first wheel braking device (08) and the second
wheel braking device (09) with time when the first wheel braking device (08) and the second
wheel braking device (09) get actuated upon actuation of the first brake actuating means (02).
For example, a plot 206 represents changes in torque against time at a disk brake corresponding
to the first wheel braking device (08) (shown as 'FRONT'), and a plot 208 represents changes in
torque against time at a disk brake corresponding to the second wheel braking device (09)
(shown as 'REAR').
SECOND EMBODIMENT
[0060] In the second embodiment as depicted in Figure 3, a braking system (0 1 B) comprises
inter-alia, the first wheel braking device (08), the second wheel braking device (09), the first
brake actuating means (02) such as the brake lever mounted on the handlebar of a vehicle, the
cylinder assembly (05) mounted on the vehicle body frame thereof that is adapted with such
mechanism that keeps the first piston (32) and the second piston (21) biased to their default
positions, the second brake actuating means (03) such as the brake pedal, the first connecting
means in the form of a cable such as the first brake actuating connecting means (06A) and the
second brake actuating connecting means (06B), and the second connecting means such as the
first wheel connecting means (07F) and the second wheel connecting means (07R). The first
wheel braking device (08) and the second wheel braking device (09) are connected to the first
wheel (04A) and the second wheel (04B) of the two wheeled vehicle, respectively, for
application of braking thereof.
[0061] As illustrated ·in Figure 3A, the cylinder assembly (05) is a multi stage master
cylinder comprising the first hydraulic chamber ( 11) and the second hydraulic chamber ( 12)
separated by the floating wall (13F). The floating wall (13F) at its ends facing the first hydraulic
chamber (11) and the second hydraulic chamber (12) is provided with elastic blockers for
example a first set of elastic blockers (26) and (27) and a second set of elastic blockers (28) and
(29) for blocking the movement of the floating wall (13F) beyond them. More specifically, the
first set of elastic blockers (26) and (27) are configured to restrict the movement of the floating
wall ( 13F) in the first hydraulic chamber (11) at a first offset distance from the first wheel
connecting means (07F). Similarly, the second set of elastic blockers (28) and (29) are
configured to restrict the movement of the floating wall (13F) in the second hydraulic chamber
(12) at a second offset distance from the second wheel connecting means (07R). The first set of
elastic blockers (26) and (27) and the second set of elastic blockers (28) and (29) are separated
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by the floating wall (13F) by a pre-defined· distance. In an embodiment, the elastic blockers can
be a set of rigid blockers.
[0062] The first hydraulic chamber (II) is provided with the first piston (32). The first
piston (32) on its one side is connected to the push rod ( 17), and the first piston (32) can be
pushed upward (inside the first hydraulic chamber (II)) upon the actuation of the first brake
actuating means (02). Upon such actuation of the first brake actuating means (02), the first piston
(32) moves against the spring force. The first hydraulic chamber (11) is in communication with
the first reservoir (14). Similarly, the second hydraulic chamber (12) is provided with the second
piston (21). The second piston (21) on its one side is connected to the push link (24) and the
second piston (21) can be pushed downward (within the first hydraulic chamber (11)) upon
actuation of the second brake actuating means (03), and upon such actuation, the second piston
(21) moves against the spring ·force, The second hydraulic cham.ber ( 12) is in communication .
with the second reservoir ( 15).
[0063] In its default position, the floating wall ( 13F) I ies connected to the first set of elastic
blockers (26) and (27) towards the first hydraulic chamber ( 11 ). The first set of elastic blockers
(26) and (27) and the second set of elastic blockers (28) and (29) are provided distance apart and
are separated by the floating wall (13F).
[0064] The first-brake actuating connecting means (06A) at its one end is connected to the
first brake actuating means (02) i.e. the brake lever and at its other end is connected to the push
rod (17). Similarly, the second brake actuating connecting means (06B) at its one end is
connected to the second brake actuating means (03) i.e. the brake pedal and at its other end is
connected to the push link (24).
[0065] The first wheel connecting means (07F) and the second wheel connecting means
(07R) are of hydraulic lines. The first wheel connecting means (07F) hydraulically connects the
first wheel braking device (08) with the first hydraulic chamber (11). The second wheel
connecting means (07R) hydraulically connects the second wheel braking device (03) with the
second hydraulic chamber (12).
[0066] When the first actuating means (02) is operated to be rotated clockwise as indicated
by arrow (A) in Figure 3, the push rod (17) moves anticlockwise as indicated by arrow (B) and
the first piston (32) is pressed into the -first hydraulic chamber (II) against the spring force. The
upward movement of the first piston (32) as. indicated by arrow (C) is configured to apply a
hydraulic pressure at the first wheel braking device (08) through a first wheel connecting means
(07F) to actuate the first wheel braking device (08).
[0067] ·Simultaneously or with a pre~determined time period, the floating wall (13F) moves
towards the second set (28) and (29) of elastic blockers under the influence of the upward
movement of the first piston (32) as indicated by arrow (G), thereby applying the first hydraulic
pressure at the second wheel braking device (09} via the second wheel connecting means (07R)
to actuate the second wheel braking device (09).
[0068] When the second brake ·actuating means (03) is operated to be rotated clockwise as
indicated by arrow (D) in Figure 3, the push-link (24) moves anticlockwise as indicated by arrow
12
(E) and the second piston (21) is pressed downward into the second hydraulic chamber (12)
against the spring force. The floating wall ( 13 F) does not move beyond its default position in the
second hydraulic chamber (12) under the influence of the second piston (21) due to presence of
the first set of elastic blockers (26) and (27). The downward movement of the second piston (21)
as indicated by arrow (F) is configured to apply a hydraulic pressure (e.g., second hydraulic
pressure) at the second wheel braking device (09) through the second wheel connecting means
· (07R) to actuate the second wheel braking device (09). Hence, upon actuating the second brake
_ actuating means (03), only the second wheel braking device (09) is actuated with no changes in
the state of the first wheel braking device (08).
[0069] The actuation of first wheel braking device (08) and the second wheel braking
device (09) upon the actuation of the first brake actuating means (02) occurs simultaneously or
-with a predetermined delay. Thus, actuation of'the first .brake actuating means (02) causes the
first wheel braking, device- (08) and the second wheel braking device (09) to work in an
interlocked manner.
[0070] It should be understood that the present embodiment can also be modified to actuate
the first wheel braking device (08) and the second wheel braking device (09) upon the actuation
of the second brake actuating means (03).
[0071] Figure 4A depicts a graphical representation of the change in braking pressure output
as applicable on respective master cylinders of the first wheel braking device (08) and the second
wheel braking device (09) with time when the first wheel braking device (08) and the second
wheel braking device (09) get actuated upon the actuation of the first brake actuating means (02).
For example, a plot 402 represents pressure variation against time in the first hydraulic chamber
(11) corresponding to the first wheel braking device (08) (shown as 'FRONT'), and a plot 404
represents pressure variation against time in the second hydraulic chamber ( 12) corresponding to
the second wheel braking device (09) (shown as 'REAR'). It is noted that upon actuation of the
first brake actuating means (02), the pressure is applied in the second hydraulic chamber (12)
after a pre-determined time delay (see, 'd') from a time of application of the pressure in the first
hydraulic chamber ( 11 ).
[0072] Similarly, Figure- 4B depicts a graphical representation of change in torque
applicable on the respective disc brakes of the first wheel braking device (08) and the second
wheel braking device (09) with time when the first wheel braking device (08) and the second
wheel braking device (09) get actuated upon actuation of the first brake actuating means (02).
For example, a plot 406 represents changes in torque against time at a disk brake corresponding
to the first wheel braking device (08) (shown as 'FRONT'), and a plot 408 repr-esents changes in
torque against time at a disk brake corresponding to the second wheel braking device (09)
(shown as 'REAR').
THIRD EMBODIMENT
[0073] - In- the third embodiment as depicted in Figure 5, a braking system (0 1 C) comprises
inter-alia, the first wheel braking device (08), the second wheel braking device (09), the first
brake actuating means (02) such as the brake lever mounted on the handlebar of a vehicle, the
cylinder assembly (05) mounted ·on the vehicle body frame thereof that is adapted with such
mechanism that keeps the first piston (32) and the second piston (21) biased to their default
13
...
positions, the second brake actuating means (03) such as the brake pedal, the first connecting
means in the form of a cable such as the first brake actuating connecting means (06A) and the
second brake actuating connecting means (068), and the second connecting means such as the
first wheel connecting means (07F) and the second wheel connecting means (07R).
[0074] As illustrated in Figure SA, the cylinder assembly (05) is a multi stage master
cylinder comprising the first hydraulic chamber (II) and the second hydraulic chamber (12)
separated by arigid wall (13R) and the floating wall (13F). The rigid wall (13R) is positioned at
a pre-determined distance from the floating wall (13F). The first hydraulic chamber (II) is
provided with the first piston (32). The first piston (32) on its one side is connected to the push
rod (I7), and the first piston (32) can be pushed upward against the spring force upon the
actuation of the first brake actuating means (02). The first hydraulic chamber (II) is in
communication with the first reservoir (I4). Similarly, the second hydraulic chamber (I2) is
provided with the second piston (2I ). The second piston (2I) on its one side is connected to the
push link (24) and the second piston (2I) can be pushed downward upon actuation ofthe second
brake actuating means (03), and upon such actuation, the second piston (21) moves against the
spring force. The second hydraulic chamber (I2) is in communication with the second reservoir
(15).
[007'5) In this present embodiment as depicted in Figure 5, the first piston (32) within the
first hydraulic chamber (II) is connected to the rigid wall ( 13R) through a projection (33). A
recessed portion (35) of the rigid wall (13R) is provided on the projection (33) so to movably
connect the end portion (see, end 33a) of the projection (33) to the recessed portion (35) of the
rigid wall (13R). More particularly, the movably connected assembly of the projection (33) to the
recessed portion (35) of rigid wall (13R) is formed with the projection (33) aligned
longitudinally to the transversely aligned rigid wall (I3R) so as to have aT-shaped cross section.
The other end (see, end 33b) of the projection (33) is coupled to an intermediate portion of the
first piston (32) along its length.
[0076] The first brake actuating connecting means (06A) at its one end is connected to the
first brake actuating m~ans (02) i.e. the brake lever and at its other end is connected to the push
rod (17). Similarly, the second brake actuating connecting means (068) at its one· end is
connected to the second brake actuating means (03) i.e. the brake pedal and at its other end is.
connected to the push link (24).
[0077] The first wheel connecting means (07F) and the second wheel connecting means
(07R) are hydraulic lines. The first wheel connecting means (07F) hydraulically connects the
first wheel braking device (08) with the first hydraulic chamber (II). The second wheel
connecting means (07R) hydraulically connects the second wheel braking device (09) with the
second hydraulic chamber ( I2).
[0078] When. the first brake actuating means (02) is operated to be rotated clockwise as
indicated by arrow (A) in the Figure 5, the push rod (17) moves anticlockwise as indicated by
· arrow (B) and the .first piston (32) is pressed upwards into the first hydraulic chamber (II)
against the force of the spring. The upward movement of the first piston {32) as indicated by
arrow (C) is· configured to apply a hydraulic pressure at the first wheel braking device {08)
through the first wheel connecting means (07F) to actuate the first wheel braking device (08).
14
t
• I
[0079] Simultaneously or with a pre-determined time period, the projection (33) moves in
forward direction under the influence of the upward movement of the first piston (32). The
upward movement of the projection (33) causes the floating wall (13F) to move upward, thereby
applying a hydraulic pressure (e.g., a third hydraulic pressure) at the second wheel braking
device (09) via the second wheel connecting means (07R) to actuate the second wheel braking
device (09).
[0080] When the second brake actuating means (03) is operated to be rotated clockwise as
indicated by arrow (D) in Figure 5, the push-link (24) moves anti-clockwise as indicated by
arrow (E) and the second piston (21) is pressed downwards into the second hydraulic chamber
(12) against the spring force. The downward movement of the second piston (21) as indicated by
arrow (F) is configured to apply a hydraulic pressure (e.g., a second hydraulic pressure) at the
second wheel braking device (09) through the second wheel connecting means (07R) to actuate
the second wheel braking device (09). Hence, upon actuating the second brake actuating means
(03), only the second wheel braking device (09) is actuated with no changes in the state of the
first wheel braking device (08).
[0081] The actuation of the first wheel braking device (08) and the second wheel braking
device (09) upon the actuation of the first brake actuating means (02) occurs simultaneously or
with a predetermined delay. Thus, actuation of the first brake actuating means (02) causes the
first wheel braking device (08) and the second wheel braking device (09) to work in an
interlocked manner.
[0082] It should be understood that the present embodiment can also be modified to actuate
the first wheel braking device (08) and the second wheel braking device (09) upon the actuation
ofthe second brake actuating means (03).
[0083] Figure 6A depicts a graphical representation of the change in braking pressure output
as applicable on the respective master cylinders of the first wheel braking device (08) and the
second wheel braking device (09) with time when the first wheel braking device (08) and the
second wheel braking device (09) get actuated upon the actuation of the first brake actuating
means (02) .. For example, a plot 602 represents pressure variation against time in the first
hydraulic chamber (I 1) corresponding to the first wheel braking device (08) (shown as
'FRONT'), and a plot 604 represents pressure variation against time in the second hydraulic
chamber (12) corresponding to the second wheel braking device (09) (shown as 'REAR'). It is
noted that upon actuation of the first brake actuating means (02), the pressure is applied in the
second hydraulic chamber (12) after a pre-determined time delay (see, 'd') from a time of
application of the pressure in the first hydraulic chamber (11).
[0084] · Similarly, Figure 6B depicts a graphical representation of change in torque
applicable on the respective disc brakes of the first wheel braking device (08) and the second
wheel braking device (09) with time when the first wheel braking device (08) and the second
wheel braking device (09) get actuated upon actuation of the first brake actuating means (02).
For example, a plot 606 represents changes in torque against time at a disk brake corresponding
to the first wheel braking device (08) (shown as 'FRONT'), and a plot 608 represents changes in
torque against time at a disk brake corresponding to the second wheel braking device (09)
(shown as 'REAR').
15
;
FOURTH EMBODIMENT
[0085] In the fourth embodiment as depicted in Figure 7, a braking system (0 I D) comprises
inter-alia, the first wheel braking device (08), the second wheel braking device (09), the first
brake actuating means (02) such as a brake lever mounted on a handlebar of a two wheeled
vehicle, the cylinder assembly (05) mounted on a vehicle body frame thereof that is provided
with such mechanism that keeps the first piston (32) and the second piston (21) biased to their
default positions, the second brake actuating means (03) such as a brake pedal, the first
connecting means in the form of a cable such c;~s the first brake actuating connecting means (06A)
and the second brake actuating connecting means (068), and the second connecting means such
as the first wheel connecting means (07F) and the second wheel connecting means (07R). The
first wheel braking device (08) and the second wheel braking device (09) are connected to the
first wheel (04A) and the second wheel (048) of the two wheeled vehicle, respectively for
application of braking thereof.
· [0086] · As illustrated in Figure 7 A, the cylinder assembly (05) is a multi stage master
cylinder comprising of the first hydraulic chamber (II) and the second hydraulic chamber (12)
separated by the rigid wall (13R). The first hydraulic chamber (11) is provided with the first
piston (32). The first piston (32) on its one side is connected to the push rod ( 17), and the first
piston (32) can be pushed upward (within the first hydraulic chamber (11)) upon the actuation of
the first brake actuating means (02) and upon such actuation, the first piston (32) moves against a
spring force. The first hydraulic chamber (II) is in communication with the first reservoir (14).
[0087] Similarly, the second hydraulic chamber ( 12) is provided with the second piston
(21 ). The second piston (21) on its one side is connected to the push link (24) and the second
piston (21) can be pushed downward (within the second hydraulic chamber (12)) upon actuation
ofthe second brake actuating means (03) and upon such actuation, the second piston (21) moves
against a spring force. The second hydraulic chamber ( 12) is in communication with the second
reservoir (15).
[0088] Additionally, the first hydraulic chamber (11) is in fluidic communication with the
second hydraulic ·chamber (12) through a hydraulic line (35). The hydraulic line (35) is
interposed with a first check valve (36) which is also a pressure dependent safety valve and is
arranged to be closed by an action of spring (not shown). The first check valve (36) is one-way
valve that allows flow of fluid from the first hydraulic chamber (11) into the second hydraulic
chamber (12). Furthermore, the first hydraulic chamber (II) is in fluidic communication with the
second reservoir (15) through a second check valve (37). The second check valve (37) comprises
one-way ball valve and allows a movement of fluid from the second reservoir (15) into the first
hydraulic chamber (11).
[0089] The first brake actuating connecting means (06A) at its one end is connected to the
first brake actuating means (02) in the form of the brake lever and at its other end is connected to
the push rod (17) of the first hydraulic chamber (ll). Similarly the second brake actuating
connecting means (06B) at its one end is connected to the second brake actuating means (03) in
the form of the brake pedal and at its other end is connected to the push link (24) of the second
hydraulic chamber (12).
16
[0090] The .first wheel connecting means (07F) and the second wheel connecling means
(07R) are hydraulic lines. The first wheel connecting means (07F) hydraulically connects the
first wheel braking device (08) with the first hydraulic chamber (II). The second wheel
connecting means (07R) hydraulically connects the second wheel braking device (09) with the
second hydraulic chamber ( 12).
[0091] When the first brake actuating means (02) is operated to be rotated clockwise as
indicated by arrow (A) in the Figure 7, the push rod (17) moves anti-clockwise as indicated by
arrow (B) and the first piston (32) is pressed upwards into the first hydraulic chamber (II)
against the spring force. The upward movement of the first piston (32) as indicated by arrow (C)
is configured to apply a hydraulic pressure at the first wheel braking device (08) for actuating the
first wheel braking device (08) through the first wheel connecting means (07F).
[0092] Simu.lt~meously or with a pre-determined time period, the fluid flows out of the first
hydraulic chamber (11) through the hydraulic line (35) into the second hydraulic chamber (12).
·As the fluid flows into the second hydraulic chamber (12), it causes the second piston (21) to
move downwards against the action of spring thereby applying a first hydraulic pressure af the
second wheel braking device (09) for actuating the second wheel braking device (09) through the
second wheel connecting means (07R).
[0093] The fluid entered from the first hydraulic chamber (II) into the second hydraulic
chamber (12) is returned back to the first hydraulic chamber (II) when the first brake actuating
means (02) is returned back to its default position. from an actuated position. In such an event,
the fluid entered into the second hydraulic chamber (12) from the first hydraulic chamber (II)
enters the second reservoir (15) which in-turn is fluidically connected to the first hydraulic
chamber (II) through the second check valve (37).
[0094] When the second brake actuating means (03) is operated to be rotated clockwise as
indicated by arrow (D) in Figure 7, the push-link (24) moves anti-clockwise as indicated by
arrow (E) and the second piston (21) is pressed downwards into the second hydraulic chamber
(12) against the spring force. The downward movement of the second piston (21) as indicated by
arrow (F) is configured to apply a second hydraulic pressure at the second wheel braking device
(09) for actuating the second wheel braking device (09) through the second wheel connecting
means (07R).
[0095] The. actuation of the first wheel braking device (08) and the second wheel braking
device (09) upon the actuation of the first brake actuating means (02) occurs simultaneously or
with a predetermined delay. Thus actuation of the first brake actuating means (02) causes the
first wheel braking. device (08) and the second wheel braking device (09) to work in an
interlocked manner.
[0096] It should be noted that the present embodiment can be modified to actuate the first
wheel braking d~vice (08) and the second wheel braking device (09) upon the actuation of the
second brake actuating means (03).
· · [0097] Figure 8A depicts a graphical representation of change in braking pressure output as
applicable on respective master cylinders of the first wheel braking device (08) and the second
17
wheel braking device (09) with time when the first wheel braking device (08) and the second
wheel braking device (09) get actuated upon the actuation ofthe first brake actuating means (02).
For example, a plot 802 represents pressure variation against time in the first hydraulic chamber
(II) corresponding to the first wheel braking device (08) (shown as 'FRONT'), and a plot 804
represents pressure variation against time in the second hydraulic. ~h::~mber (!2) corresponding to
the second wheel braking device (09) (shown as 'REAR'). It is noted that upon actuation of the
first brake actuating means (02), the pressure is applied in the second hydraulic chamber (12)
after a pre-determined time delay (see, 'd') from a time of application of the pressure in the. first
hydraulic chamber (II): Further, as per the plots 802 and 804, after sometime, the pressure
applied in the first hydraulic chamber (II) and the second hydraulic chamber (12) become same.
[0098] Figure 88 depicts a graphical representation of change in torque applicable on the
respective disc bra~es o( the first wheel braking device (08) and the s~cond wheel braking device
, (09) with time when the first wheel braking device (08) and the second wheel braking device
(09) get actuated upon actuation of the first brake actuating means (02). For example, a plot 806
represents changes in torque against time at a disk brake corresponding to the first wheel braking
device (08) (shown as 'FRONT'), and a plot 808 represents changes in torque against time at a ·
disk brake corresponding to the second wheel braking device (09) (shown as 'REAR').
FIFTH EMBODIMENT
[0099] In the fifth embodiment as depicted in Figure 9, a braking system (01 E) comprises
inter-alia, the first wheel braking device (08), the second wheel braking device (09), the first
brake actuating means (02) such as the brake lever mounted on the handlebar of a two wheeled
vehicle, the cylinder assembly (05) mounted on the vehicle body frame thereof that is provided
with such mechanism that keeps the first piston (32) and the second piston (21) biased to their
default positions, the second brake actuating means (03) such as the brake pedal, the first
connecting means in the form of a cable such as the first brake actuating connecting means (06A)
and the second brake actuating connecting means (068), and the second connecting means such
as the first wheel connecting means (07F) and the second wheel connecting means (07R). The
first wheel braking device (08) and the second wheel braking device (09) are connected to the
first wheel (04A) and the second wheel (048) of the two wheeled vehicle, respectively for
application of braking thereof.
[00100] As illustrated in Figure 9A, the cylinder assembly (05) is a multi stage master
cylinder comprising of the first hydraulic chamber (11) and the second hydraulic chamber (12)
separated by the rigid wall (13R). The first hydraulic chamber (I I) is provided with the first
piston (32). The first piston (32) on its one side is connected to the push rod (I7), and the first
piston (32) can be pushed upward (within the first hydraulic chamber (II)) upon the actuation of
the first brake actuating means (02) and upon such actuation, the first piston (32) moves against
the spring force. The first hydraulic chamber (II) is in communication with the first reservoir
(14).
[00101] Similarly, the second hydraulic chamber (12) is provided with the second piston
(21). The second piston (21) on its one side is connected to the push link (24) and the second
piston (21) can be pushed downward (within the second hydraulic chamber (12)) upon actuation
of the second brake actuating means (03) and upon such actuation, the second piston (2I) moves
18
against the spring force. The second hydraulic chamber ( 12) ts tn communication with the
second reservoir ( 15).
[00102] Additionally, the first hydraulic chamber (11) is in fluidic communication with the
second hydraulic chamber (12) through the hydraulic line (35). The hydraulic line (35) is
interposed with the first check valve (36) which is also a pressure dependent safety valve and a
stopping arrangement (38). The first check valve (36) is a one-way valve that allows flow of
fluid only from the first hydraulic chamber (11) to the second hydraulic chamber ( 12).
Furthermore, the first hydraulic chamber (11) is in fluidic communication with the second
reservoir (15) through the second check valve (37). The second check valve (37) is a one-way
valve that allows the movement of fluid from the second reservoir ( 15) to the first hydraulic
chamber (11 ). The stopping arrangement (38) allows maintaining a constant threshold of
pressure for the movement of fluid from th<;: first hydraulic chamber (11) to the second hydraulic
chamber (12). More specifically, fluid is allowed to pass through the stopping arrangement (38)
only when the· hydraulic pressure created due to the movement of the first piston (32) in the first
hydraulic chamber (II) is greater than a threshold value at the stopping arrangement (38).
[00103] The first brake actuating connecting means (06A) at its one end is connected to the
first brake actuating means (02) i.e. the brake lever and at its other end is connected to the push
rod (17). Similarly the second brake actuating connecting means (068) at its one end is
connected to the second brake actuating means (03) i.e. the brake pedal and at its other .end is
connected to the push link (24).
[00104] The first wheel connecting means (07F) and the second wheel connecting means
(07R) are hydraulic lines. The first wheel connecting means (07F) hydraulically connects the
first wheel braking device (08) with the first hydraulic chamber (II). The second wheel
connecting means (07R) hydraulically connects the second wheel braking device (09) with the
second hydraulic chamber ( 12).
[00105] · When the first brake actuating means (02) is operated to be rotated clockwise as
indicated by arrow (A) in the Figure 9, the push rod (17) moves anti-clockwise as indicated by
arrow (B) and the first piston (32) is pressed upwards into the first hydraulic chamber ( 11)
against the spring force. The upward movement of the first piston (32) as indicated by arrow (C)
is configured to apply a hydraulic pressure at the first wheel braking device (08) for actuating the
first wheel braking device (08) through the first wheel connecting means (07F).
[00106] Simultaneously or with a pre-determined time period, fluid flows from the first
hydraulic chamber (11) through the hydraulic line (35) to the second hydraulic chamber (12).
The opening ofthe hydraulic line (35) and flow of fluid depends on the characteristics ofthe first
check valve (36) which opens when the pressure build up in the first hydraulic chamber ( 11) is
sufficient enough to cause the opening of the first check valve (36). The movement of fluid from
the first hydraulic chamber (11) through the hydraulic line (35) into the second hydraulic
-chamber (12) actuates the second piston (21) to move downwards against the action of spring
(not shown in figures) thereby applying a first hydraulic pressure at the second wheel braking
device (09) for actuating the second wheel braking device (09) through the ·second wheel
connecting means (07R).
19
..
[00107] · The fluid entered from the first hydraulic chamber (II) into the second hydraulic
chamber (12) is returned back to the first hydraulic chamber (II) when the first brake actuating
· means (02) is returned back to its default position from an actuated position. In such an event,
the fluid entered into the second hydraulic. chamber (12) from the first hydraulic chamber (II)
enters into the second reservoir (15) which in-turn is fluidically connected to the first hydraulic
chamber (II) through the second check valve (37).
[00108] When the second brake actuating means (03) is operated to be rotated clockwise as
indicated by arrow (D) in Figure 9, the push-link (24) moves anti-clockwise as indicated by
arrow (E) and the second piston (21) is pressed downwards into the second hydraulic chamber
( 12) against the spring force. The downward movement of the second piston (21) as indicated by
arrow (F) is configured to apply a second hydraulic pressure at the second wheel braking device
(09) for actuating the second. wheel braking device (09) through the second wheel connecting
means (07R).
[00109] The actuation ofthe first wheel braking device (08) and the second wheel braking
device (09) upon the actuation of the first brake actuating means (02) occurs simultaneously or
with a predetermined delay. Thus, actuation of the first brake actuating means (02) causes the
first wheel braking device (08) and the second wheel braking device (09) to work in an
interlocked manner.
[00110] It should be noted that the present embodiment can be modified to actuate the first
wheel braking device (08) and the second wheel braking device (09) upon the actuation of the
second brake actuating means (03).
[00111] Figure lOA depicts a graphical representation of change in braking pressure output
as applicable on respective master cylinders of the first wheel braking device (08) and the second
wheel ·braking device (09) with time when the first wheel braking device (08) and the second
wheel braking device (09) get actuated upon the actuation of the first brake actuating means (02).
For example, a plot 1002 represents pressure variation against time in the first hydraulic chamber
(II) corresponding to the first wheel braking device (08) (shown as 'FRONT'), and a plot 1004
represents pressure variation against time in the second hydraulic chamber (12) corresponding to
the second wheel braking device (09) (shown as 'REAR'). It is noted that upon actuation of the
first brake actuating means (02), the pressure is applied in the second hydraulic chamber (12)
after a pre-determined time delay (see, 'd') from a time of application of the pressure in the first
hydraulic chamber (11 ).
[00112] Figure 1 OB depicts a graphical representation of change in torque applicable on the
respective disc brakes of the first wheel braking device (08) and the second wheel braking device
(09) with time .when the first wheel braking device (08) and the second wheel braking device
(09) get actuated upon actuation of the first brake actuating means (02). For example, a plot I 006
represents changes in torque against time at a disk brake corresponding to the first wheel braking
device (08).(shown as 'FRONT'), and a plot 1008 represents changes in torque against time at a
disk brake corresponding to the second wheel braking device (09) (shown as 'REAR').
SIXTH EMBODIMENT
20
.i
'·
[00113] In the sixth embodiment as depicted in Figure II, a braking system (0 I F) comprises
of inter-alia. the first wheel braking device (08) with a single calliper system, the second wheel
braking device (09), the first brake actuating means (02) such as brake lever mounted on the
handlebar of the two wheeled vehicle, the cylinder assembly (05) mounted on the vehicle body
frame thereof and is adapted with such mechanism that keeps the first piston (32) and the second
piston (21) biased to their default positions, the second brake actuating means (03) such as a
brake pedal, the first connecting means in the form of a cable such as the first brake actuating
connecting means (06A) and the second brake connecting means (068), and the second
connecting means such as the first wheel connecting means (07F) and a first rear wheel
connecting means (07R 1) and a second rear wheel connecting means (07R2). The first wheel
braking device (08) and the ·second wheel braking device (09) are connected to the first wheel
(04A) and the second wheel (048) of the two wheeled vehicle, respectively for application of
braking thereof.
[00114] As illustrated in Figure 11A, the cylinder assembly (05) is a multi stage master
cylinder comprising of the first hydraulic chamber (11) and the second hydraulic chamber (12)
separated by the rigid wall (13R): The first hydraulic chamber (11) is provided with the first
piston (32). The first piston (32) on its one side is connected to the push rod (17), and the first
piston (32) can be pushed upward (in the first hydraulic chamber (II)) upon actuation ofthe first
brake actuating me(lns (02) against the spring force .. The first hydraulic chamber ( 11) is in
communication with the first reservoir (14). Similarly; the second hydraulic chamber (12) is
provided with the second piston (21 ). The second piston (21) on its one side is connected to the
push link (24), and the second piston (21) can be pushed downward (in the second hydraulic
chamber ( 12)) upon actuation of the second brake actuating means (03) against the spring force.
The second hydraulic chamber ( 12) is in communication with the second reservoir ( 15).
[00115] The first brake actuating connecting means (06A) at its one end is connected to the
first brake actuating means (02) i.e. the brake lever and at its other end is connected to the push
rod (17). Similarly, the second brake actuating connecting means (068) at its one end is
connected to the second brake actuating means (03) i.e. the brake pedal and at its other end is
connected to the push link (24) of the second hydraulic chamber (12).
[00116] The first wheel connecting means (07F) and the second wheel connecting means, for
example, the first rear wheel connecting means (07R 1) and the second rear wheel connecting
means (07R2) are of hydraulic lines. The first wheel connecting means (07F) hydraulically
connects the first wheel braking device (08) with the first hydraulic chamber (11). The first
·hydraulic chamber (11) is connected to the second wheel braking device (09) through the first
rear wheel connecting means-(07Rl) and the second hydraulic chamber (12) is connected to the
second wheel braking device (09) through the· second rear wheel connecting means (07R2),
respectively.
[00117] When the first brake actuating means (02) is operated to be rotated clockwise as
indicated by arrow (A) in the Figure II, the push rod ( 17) moves anti-clockwise as indicated by
arrow (B) and the· first piston (32) is pressed upwards into the first hydraulic chamber (11)
against the spring force. The upward movement of the first piston (32) as indicated by arrow (C)
is configured to apply a hydraulic pressure at the first wheel braking device (08) for actuating the
first wheel braking device (08) through the first wheel connecting means (07F). Simultaneously
21
or with a pre-determined delay, the first hydraulic chamber (I I) actuates the second wheel
braking device (09) by applying a first hydraulic pressure at the second wheel braking device
(09) through the first rear wheel connecting means (07R I).
[00118] · When the second brake actuating means (03) is operated to be rotated clockwise as
indicated by arrow (D) in the Figure 11, the push link (24) moves anti-clockwise as indicated by
arrow (E) and the second piston (21) is pressed downward into the second hydraulic chamber
(12) against the spring force. The downward movement ofthe second piston (21) as indicated by
arrow (F) is configured to apply a second hydraulic pressure at the second wheel braking device
(09) for actuating the second wheel braking device (09) through the second rear wheel
connecting means (07R2).
[00119] The aCtuation of the first wheel brakjng device (08) and the second wheel. braking
device (09) upon the actuation of the first brake actuating means (02) occurs simultaneously or
with a pre-determined delay. Thus, actuation of the first brake actuating means (02) causes the
first wheel braking device (08) and . the second wheel braking device (09) to work in an
interlocked manner.
[00120] It should be noted that the present embodiment can be modified to actuate the first
wheel braking device (08) and the second wheel braking device (09) upon the actuation of the
second brake actuating means (03).
[00121] Figure 12A depicts a graphical representation of change in output pressure as
applicable on the respective master cylinders of the first wheel braking device (08) and the
second wheel braking device (09) with time when the first wheel braking device (08) and the
second wheel braking device (09) get actuated upon the actuation of the first brake actuating
means (02). For example, a plot 1202 represents pressure variation against time in the first
hydraulic chamber (11) corresponding to the first wheel braking device (08) (shown as
'FRONT') and also represents pressure variation against time in the second hydraulic chamber
(12) corresponding to the second wheel braking device (09) (shown as 'REAR'). It is noted that
upon actuation of the first brake actuating means (02), the pressure is applied simultaneously in
the first hydraulic chamber (11) and the second hydraulic chamber (12).
[00122] Figure 12B depicts a graphical representation of change in torque applicable on the
respective disc brakes of the first wheel braking device (08) and the second wheel braking device
(09) with time when the first wheel braking device (08) and the secona wheel braking device
(09) get actuated upon actuation of the first brake actuating means (02). For example, a plot 1204
represents changes in torque against time at a disk brake corresponding to the first wheel braking
device (08) (shown as 'FRONT'), and a plot 1206 represents changes in torque against time at a
disk brake corresponding to the second wheel braking device (09) (shown as 'REAR').
· [00123] Various embodiments of the present invention advantageously provide a braking
. system which allows the first and the second wheel braking devices to work in an interlocked
manner, where the interlocked actuation ofthe first and the second wheel braking devices can be
achieved through a single cylinder. Such example embodiments relate to a braking system which
allows the first and the second wheel braking device to work in an interlocked manner, where the
single cylinder can be arranged conveniently without any location constraint. Further, example
22
.-------------------------------~--------------~ -----
embodiment of the present invention relate to a braking system which allows the first and the ·
second wheel braking device to work in an interlocked manner with a simple and compact
construction. Moreover, the present invention relates to a braking system which permits an
optimum distribution of dynamic force between the first and the second wheel braking device at
a low manufacturing cost.
[00124] While few embodiments of the present invention have been described above, it is to
be un. derstood that the invention is not limited to th. e above embodiments and modifications may.
be appropriately made thereto within the spirit and scope ofthe invention.
[00125] · While considerable emphasis has been placed herein on the patticular features ofthis
invention, it will be appreciated that various modifications can be made, and that many changes
can ·be made in the preferred embodiments without departing from the principles. of the
invention. These and other modifications· in the nature of the invention or the preferred
embodiments will be apparent to those skilled in the art from the disclosure herein, whereby it is
to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as
illustrative of the invention and not as a limitation.

CLAIMS
We claim:
I. A braking system, comprising:
a first wheel braking device for applying brake on a first wheel of a two wheeled vehicle
and a second wheel braking device for applying brake on a second wheel of the two wheeled
·vehicle;
a first brake actuating means and a second brake actuating means; and
a cylinder assembly operatively connected to the tirst brake actuating means and .the
second brake actuating means, the cylinder assembly comprising:
. a first hydraulic chamber and a second hydraulic chamber, the first hydraulic
chamber and' the second hydraulic chamber separated by a floating wall, the first
hydraulic chamber hydraulically connected to the first wheel braking device via a first
wheel connecting means and the second hydraulic chamber hydraulically connected to
the s~cond wheel braking device via a second wheel connecting means;
a first piston operatively coupled with the first brake actuating means and
configured to reciprocate within the first hydraulic chamber; and
a second piston operatively coupled with the second brake actuating means and
configured to reciprocate within the first hydraulic chamber,
wherein an actuation of the first brake actuating means causes a movement of the first
piston in the first hydraulic chamber thereby applying a hydraulic pressure at the first wheel
braking device via the first wheel connecting means for actuating the first wheel braking device,
and the movement of the first piston causes a movement of the floating wall in the second
hydraulic chamber thereby applying a first hydraulic pressure at the second wheel braking
device via the second wheel connecting means for actuating the second wheel braking device,
wherein an actuation of the second brake actuating means causes a movement of the
second piston in the second hydraulic chamber thereby applying a second hydraulic pressure at
the second wheel braking device via the second wheel connecting means for actuating the
second wheel braking device, and
wherein upon the actuation of the second brake actuating means, a movement of the
floating wall is restricted against one or more stoppers at an offset distance from the first wheel
connecting means thereby precluding a movement of fluid to the first wheel braking device via
the first wheel connecting means.
2. The braking system as claimed in claim I, further comprising:
· a first reservoir configured to be in fluidic communication with the first hydraulic
chamber; and
a second reservoir configured to be in fluidic communication with the second hydraulic
chamber.
3. The braking system as claimed in claim I, further comprising:
a push· rod operatively coupled to the first piston and to the first brake actuating means
-via a first brake actuating connecting means; and
. a push link operatively coupled to the second piston and to the second brake actuating
means via a second brake actuating connecting means,
24
wherein the ·actuation of the first brake actuating means causes the first brake actuating
connecting means to move the push rod attached to the first piston for the movement of the first
piston in the first hydraulic chamber, and
wherein the actuation of the second brake actuating means causes the second brake
actuating connecting means to move the push link attached to the second piston for the
movement of the second piston in the second hydraulic chamber.
4. The braking system as claimed in claim 3, wherein each of the first brake actuating
connecting means· and the second brake actuating connecting means comprises one of a cable or
a wirr..
5. The braking system as claimed in claim I, wherein the actuation of the first brake
actuating means causes the actuation of the first wheel braking device and the second ·wheel
braking device simultaneously.
6. The braking system as claimed in claim I, wherein the actuation of the first brake
actuating means causes the actuation of the first wheel braking device and causes the actuation of
the second wheel braking device after a pre-determined delay.
7. The braking system as claimed in claim I, further comprising:
a first set of elastic blockers configured to restrict the movement of the floating wall in
the first hydraulic chamber at a first offset distance from the first wheel connecting means; and
a second set of elastic blockers configured to restrict the movement of the floating wall in
the second hydraulic chamber at a second offset distance from the second wheel connecting
means, the first set of elastic blockers and the second set of elastic blockers separated by the
floating wall by a pre-defined distance.
8. The braking system as claimed m claim 1, wherein the cylinder assembly further
comprises:
a rigid wall between the first hydraulic chamber and the second hydraulic chamber
positioned at a pre-determined distance from a default position of the floating wall, the rigid wall
comprising a recessed portion; and
a projection having an end attached to an intermediate portion of the first piston and
another end aligned with the recessed portion such that the projection is movable through the
recessed portion,
wherein the movement of the first piston causes a movement of the projection through the
recessed portion :of the rigid wall to cause the movement of the floating wall in the second
hydraulic chamber thereby applying a third hydraulic pressure at the second wheel braking
device via the second wheel connecting means-.
9. The braking system as claimed in claim 1, wherein each of the first wheel connecting
means and the second wheel connecting means comprises one of a hydraulic line and a
pneumatic line.
10. The braking system as claimed in claim 1, wherein each of the first brake actuating
means and the second brake actuating means comprises one of a brake lever and a brake pedal.
25
I I. The braking system as claimed in claim I, wherein the movement of the first piston in the
first hydraulic chamber causes a movement of fluid from the first hydraulic chamber to the first
wheel ·connecting means for applying the hydraulic pressure at the first wheel braking device,
thereby causing the actuation of the first wheel braking device.
12. The braking system as claim-ed in claim I, wherein the movement of the floating wall in
the second hydraulic chamber causes a movement of fluid from the first hydraulic chamber to the
second wheel connecting means for applying the first hydraulic pressure at the second wheel
brakmg device, thereby causing the actuation of the second wheel braking uevict::.
-13. The braking system a~ claimed in claim 1, wherein the movement of the second piston
causes a movement o{ fluid from the sec-ond hydraulic chamber to "the second wheel -~onnecting
means for applying the second hydraulic pressure at the second wheel braking device, thereby
causing the actuation of the second wheel braking device.
14. A braking system, comprising:
a first wheel braking device for applying brake on a first wheel of a two wheeled vehicle
and a second wheel braking device for applying brake on a second wheel of the two wheeled
vehicle;
a first brake actuating means and a second brake actuating means; and
a cylinder assembly operatively connected to the first brake actuating means and the
second brake actuating means, the cylinder assembly comprising:
a first hydraulic chamber and a second hydraulic chamber, the first hydraulic
chamber and the second hydraulic chamber separated by a wall, the first hydraulic
chamber hydraulically connected to the first wheel braking device via a first wheel
connecting means, the second hydraulic chamber hydraulically connected to the second
wheel braking device via a second wheel connecting means;
a first check valve interposed in a hydraulic line connecting the first hydraulic
chamber and the second hydraulic chamber, the first check valve configured to facilitate
fluidic communication from the first hydraulic chamber to the second hydraulic chamber
via the hydraulic line;
a first piston operatively coupled with the first brake actuating means and
configured to reciprocate within the first hydraulic chamber; and
a second piston operatively coupled with the 'Second brake actuating means and
configured to reciprocate within the first hydraulic chamber,
wherein an actuation of the first brake actuating means causes a movement of the first
piston in the first hydraulic chamber thereby applying a hydraulic pressure at the first wheel
braking device via the first wheel ·connecting means for actuating the first wheel braking device,
and the movement of the first piston causes a movement of fluid from the first hydraulic
chamber to the second hydraulic chamber via the hydraulic line through the first cht:ck valve to
facilitate a movement of the second piston thereby applying a first hydraulic pressure at the
second wheel braking device via the second wheel--connecting means for ·actuating the second
wheel braking device, and
26
wherein an actuation of the ·second brake actuating means causes a movement of the
second piston in the second hydraulic chamber thereby applying a second hydraulic pressure at
the second wheel braking device for actuating the second wheel braking device.
15. The braking system as claimed in claim 14, further comprising:
a first reservoir configured to be in fluidic communication with the first hydraulic
chamber;
· a second reservoir configured to be in fluidic communication with the second hydraulic
chamber; and
a second check valve configured to facilitate a movement of fluid from the second
reservoir to the first hydraulic·chamber,
wherein when the first brake actuating means returns to a default position from an
actuated. position, the -second .check valve enables the fluid entered into the second hydraulic
chamber from the first hydraulic chamber to return back to the first hydraulic chamber, and
wherein the· second check ·valve is a one-way· ball valve configured to facilitate the
movement of the fluid from th~ second reservoir to the first hydraulic chamb_er.
16. The braking system as claimed in claim 14, wherein the first check valve is a one way
valve that· is a pressure dependent safety valve configured to control the movement of fluid from
the first hydraulic chamber to the second hydraulic chamber.
17. The braking system as claimed in claim 14, wherein the first check valve is connected
with a stopping arrangement configured to allow the movement of fluid from the first hydraulic
chamber to the second hydraulic chamber if the hydraulic pressure due to the movement of the
first piston in the first hydraulic chamber is greater than a threshold value.
18. The braking system as claimed in elaim 14, further comprising:
a push rod operatively coupled to the . first piston and connected to the first brake
actuating means via a first brake actuating connecting means; and
a push link operatively coupled to the second piston and connected to the second brake
actuating -means via a second brake actuating connecting means,
wherein the actuation of the first brake actuating means causes the first brake actuating
connecting means to move the push rod attached to the first piston for the movement of the first
piston in the first hydraulic chamber, and
wherein. the actuation of the second brake actuating means causes the second brake
actuating connecting means. to move the push link attached to the second piston for the
movement of the second piston in the second hydraulic chamber.
19. A braking system, comprising:
·a first wheel braking device for applying brake on a first wheel of a two wheeled vehicle
·and a second wheel braking device for applying brake on a second wheel of the two wheeled
vehicle;
· · · a first brake actuating means and a second brake actuating means; and
·a cylinder assembly operatively connected to the first brake actuating means and the
· ·second brake actuating means, the cylinder assembly comprising:
27
ou r• u .n n
..[,: ~- • .:.;:.:.a·
a first hydraulic chamber and a second hydraulic chamber, the first hydraulic
chamber and the second hydraulic chamber separated by a wall, the first hydraulic
chamber hydraulically connected to the first wheel braking device via a first wheel
connecting means and hydraulically connected to the second wheel braking device via a
first rear wheel connecting means, the second hydraulic chamber hydraulically conn~cted
to the second wheel braking device via a second rear wheel connecting means;
a first piston operatively coupled with the first brake actuating means and
configured to reciprocate within the first hydraulic chamber; and
a second piston operatively coupled with the second brake actuating means and
configured to reciprocate within the first hydraulic chamber,
wherein an actuation of the first brake actuating means causes a movemeul uf the first
piston in. the first hydraulic chamber thereby applying a hydraulic pressure at the first wheel
braking device via.the,.fir.st wheel connecting means for actuating the first wheel braking devic_e,
and the movement of the first piston applies a first hydraulic pressure at the second wheel
braking device via the first rear wheel connecting means for actuating the second wheel braking
device, and
wherein. an actuation of the second brake actuating means causes the movement of the
second piston in the second hydraulic chamber thereby applying a second hydraulic pressure at
the second- wheel braking device via the second rear wheel connecting means for actuating the
second wheel braking device.
20. The braking system as claimed in claim 19, further comprising:
a first reservoir configured to be in fluidic communication with the first hydraulic
chamber; and
a second reservoir configured to be in fluidic communication with the second hydraulic
chamber.