FORM 2
THE Patent Act, 1970
(39 of 1970)
&
The Patent Rules, 2003
COMPLETE SPECIFICATION
(See Section 10 and Rule 13) INTERLOCKING BRAKE SYSTEM FOR A TWO WHEELER
Endurance Technologies Ltd E 93, MIDC Industrial Area, Waluj, Aurangabad, Maharashtra-431136
The following specification describes the invention

Field of the invention
The present invention relates to an interlocking brake system for a two wheeler which allows front and rear brakes to work in an interlocked manner.
Description of the prior art
Brake systems that can be used in a two wheeler, a type of a straddle type vehicle, are known as interlocking brake system, as disclosed in JP 3738260 A. Such a brake system includes a first brake operating device and a second brake operating device. The first brake operating device actuates the front brake following a braking operation. The second brake operating device causes the front and rear brakes to work in an interlocked manner following a braking operation.
More specifically, the second brake operating device is connected with an equalizer lever in a power divider via an interlocking coupling means. Connected with the equalizer lever is a rear brake coupling means that is connected with the rear brake, and a rotational lever is rotatably connected with the equalizer lever. The rotational lever is connected with a front brake coupling means that is connected with the front brake.
When the second brake operating device is operated, the equalizer lever first pulls the rear brake coupling means, thereby actuating the rear brake. When the second brake operating device is operated more forcefully, the equalizer lever rotates the rotational lever to pull the front brake coupling means, thereby actuating the front brake. Thus, operating the second brake operating device may cause the rear and front brakes to work in an interlocked manner, actuated in this order.
Also, application 742/del/1997 discloses about an "equalizer and the interlocking brake operating force transmitting system which exerts a brake operating force through the rear wheel braking force transmitting member on the rear brake when the brake operating force of the rear

brake operating member is less than a force corresponding to the force of the braking characteristic setting spring, and of driving the front brake through the interlocking brake operating force transmitting system and driving the rear brake through the rear wheel braking force transmitting member when the brake operating force of the rear brake operating member is not lower than a force corresponding to the force of the braking characteristic setting spring. The interlocking brake operating force transmitting system is provided with an interlocking master cylinder interlocked with the equalizer and capable of producing a liquid pressure to be applied to the hydraulic front brake. Thereby, allowing the braking force to be distributed efficiently between the two brake circuits.
In another invention 4312/CHE/2013 discloses a bracket which supports the brake pedal on the inner side, and an equalizer present on the inner side of the bracket. The presence of the brake pedal on the bracket makes it inevitable to be implemented only in the new two wheelers. specifically designed to carry the aforesaid bracket. However, the aforesaid bracket disclosed in the prior art cannot be used in already existing or pre-existing models of two wheeler. Those , two wheeler which are already present in the market cannot get the aforesaid bracket mounted.
Therefore, to address the aforementioned problems it is the object of the present invention to
t
have a bracket arrangement that is compatible for different models of two wheelers. The bracket arrangement can be used even in those two wheelers which are already existing in the market. Said bracket arrangement can be mounted on the two wheeler having variable models.
It is therefore the object of the present invention to provide a bracket arrangement wherein, the brake pedal is mounted separately.
It is therefore the object of the present invention to provide a bracket arrangement which can be efficiently fitted on the vehicular chassis.

Summary of the invention
In view of the foregoing, the present invention has been made, and an object of the present
invention is to provide a front hydraulic wheel and a rear mechanical wheel interlocking brake
system which is convenient to use. '
To achieve the above object, there is provided a bracket arrangement comprising; a holding spring, a push rod fork, a master cylinder, a delay valve, an oil reservoir and a hydraulic line. The bracket arrangement is generally mounted horizontal to a vehicle body. The holding spring is connected with a push rod fork, the push rod fork is connected with a master cylinder body wherein the aforesaid are generally present at a suitable inclination to the horizontal of the vehicular body on the said bracket arrangement.
According to the present invention there is provided an equaliser present vertical with respect to the push rod fork. The equaliser and the push rod fork together form a T-shaped structure. The equaliser is connected with a brake pedal, a rear rear brake rod and said push rod fork.
According to the present invention there is provided the rear brake rod which extends to the rear wheel mechanical brake circuit and supplies braking force to the rear wheel.
According to the present invention there is provided the brake pedal which is mounted separately with the bracket arrangement.
According to the present invention there is provided a brake pedal when which is pressed the pedal force is transferred to the equaliser. The equaliser then proportionately distributes the force between the rear brake rod and the master cylinder assembly through the push rod fork. There is a variable mechanical ratio on the equaliser which allows that the rear brake application starts first with a delayed front brake application. Thereby, providing braking torque to both the wheels.

Initially the force at the equaliser is transferred to the rear wheel by the brake rod developing rear braking torque. Once the rear braking torque is developed the extra force is transferred to the push rod fork. As the force is transferred to the push rod fork pressure starts developing in the master cylinder assembly. The master cylinder is present with the delay valve. The presence of delay valve allows the pressure to be transferred only after a pre-defined specific pressure limit has developed in the master cylinder. Hence, allowing a delayed braking force in the front wheel brake circuit.
Brief description of the drawings
[Fig. 1] Fig. 1 is the front view of the bracket arrangement as according to the present invention.
[Fig. 2] Fig. 2 is the back view of the bracket arrangement as according to the present invention.
[Fig. 3] Fig. 3 is the front perspective view of the bracket arrangement as according to the present invention.
[Fig. 4] Fig. 4 is the back perspective view of the bracket arrangement as according to the present invention.
[Fig. 5] Fig. 5 is the front view of the bracket arrangement mounted on the two wheeler as according to the present invention.
[Fig. 6] Fig. 6 is the back view of the bracket arrangement mounted on the two wheeler as according to the present invention.
[Fig. 7] Fig. 7 is the perspective view of the bracket arrangement mounted on the two wheeler when viewed from the front right side of the two wheeler as according to the present invention

Detailed description of the invention
Hereinafter, an embodiment of delay cum master cylinder assembly for combined brake system in two wheeler according to the present invention will be described with reference to the drawings.
According to one embodiment of the present invention wherein, Fig. 1 and Fig. 2 are the front and back view of the bracket arrangement as according to the present invention. The bracket arrangement (200) comprises; a holding spring (211), a push rod fork (213), a master cylinder (215), a delay valve (217), an oil reservoir (219) and a hydraulic line (221). The bracket arrangement (200) is generally mounted horizontal of the vehicle body by the help of screw joints (315, 317). The holding spring (211) is connected with a push rod fork (213), the push rod fork is connected with a master cylinder body (215) wherein the aforesaid are generally present at a suitable inclination to the horizontal of the vehicular body on the said bracket arrangement. The master cylinder assembly (215) is mounted by the screw joints (315,317).
According to another embodiment of the present invention wherein, Fig. 3 and Fig 4 which are a front and back perspective view of the bracket arrangement. The master cylinder assembly (215) is connected with an oil reservoir (217). The master cylinder assembly (215) is connected with said oil reservoir by a hydraulic line (212). Said oil reservoir may be mounted on the bracket arrangement or it may be present separately, where said oil reservoir is mounted on the bracket arrangement it is done by screw joint (319).
Also, the master cylinder can be coupled with a delay valve assembly (217). The master cylinder assembly (215) has another hydraulic line (115) extending and supplying the braking pressure to the front wheel brake circuit.
Said push rod fork (213) is hinged (213a) with the holding spring (211) at one end. The other end of the push rod fork (213) is connected with the master cylinder assembly (215). At the

middle of said push rod fork (213) is an equaliser (255). The equaliser (255) is present vertical with respect to the push rod fork (213). The equaliser (255) and the push rod fork (213) together form a T-shaped structure. The equaliser (255) is connected with a brake pedal (113), a rear brake rod (111) and said push rod fork (213). The equaliser's upper segment (255c) is pivoted (213b) with the push rod fork (213). The middle segment of equaliser (255b) is pivoted with the brake pedal (113). The upper segment of said brake pedal (113a) establishes a connection with the middle segment of said equaliser (255b). The lower segment of the equaliser (255a) is connected with the rear brake rod (111). The lower segment of the equaliser (255a) is pivoted (11 la) with the rear brake rod.
According to another embodiment of the present invention wherein, Fig. 5 and Fig. 6 are the front and back view of the bracket arrangement mounted on the two wheeler. The rear brake rod (111) extends to the rear wheel (10) mechanical brake circuit. The rear brake rod (111) connected lower segment of the equaliser (255a) establishes a connection (Ilia) with the rear brake rod (111). The brake pedal (113) is pivoted (113a) with the middle segment of the equaliser (255b). Additionally, the brake pedal (113) is pivoted (113b) with the vehicular body. Another, hydraulic line (115) extends from the master cylinder assembly (215) said hydraulic line supplies braking pressure to the front wheel of the vehicle body. The bracket arrangement (200) is mounted horizontal to the vehicle body.
Fig. 7 is the perspective view of the bracket arrangement mounted on the two wheeler when viewed from the front right side of the two wheeler. The brake pedal (113) is pivoted (113b) with the vehicular body, it is present separate of the bracket arrangement (200). The presence of the brake pedal (113) separate from the bracket arrangement allows it to be used in various models of two wheeler. The bracket arrangement (200) is mounted on the vehicular body by screw joints (315, 317). Said screw joints (315, 317) can be used to mount the bracket arrangement in any new or a pre-existing model' Also, no change in the design of vehicular

*
chassis is required while mounting the said bracket arrangement (200) thereby making it compatible for various/ multiple models.
When the brake pedal (113) is pressed the pedal force is transferred to the equaliser (255). The equaliser (255) then proportionately distributes the force between the rear brake rod (111) and the master "cylinder assembly (215) through the push rod fork (213). There is a variable mechanical ratio on the equaliser (251) which allows that the rear brake application starts first with a delayed front brake application. Thereby, providing braking torque to both the wheels.
Initially the force at the equaliser (255) is transferred to the rear wheel by the brake rod (111) developing rear braking torque. Once the rear braking torque is developed the extra force is transferred to the push rod fork (213). As the force is transferred to the push rod fork (213) pressure starts developing in the master cylinder assembly (215). The master cylinder is present with the delay valve (217). The presence of delay valve (217) allows the pressure to be transferred only after a pre-defined specific pressure limit has developed in the master cylinder (215). Hence, this allows a delayed braking force in the front wheel brake circuit.
It will be appreciated form the foregoing description that various other embodiments of the above mentioned device are possible without departing from the scope and ambit of this invention.

Claims
We Claim:-
1. A two wheeler interlocking brake system comprising:
a bracket arrangement (200) having an equaliser (255) connected with a push rod fork (213); a brake pedal (113) connected with said equaliser (255) and said two wheeler body, wherein; a holding spring (211) is connected to said push rod fork (213), said push rod fork (213) is connected with a master cylinder (215), a delay valve (217) and an oil reservoir (219), said delay valve (217) and said oil reservoir (219) are coupled with said master cylinder assembly (215) present at a suitable inclination to the vehicular body;
2. The two wheeler interlocking braking system as claimed in claim 1, wherein, when the brake pedal (113) is pressed, the pedal force is transferred to the equaliser (255), said equaliser (255) then proportionately distributes the force between a rear brake rod (111) and the master cylinder assembly (215) through the push rod fork (213).
3. The two wheeler interlocking brake system as claimed in claim 1, wherein the bracket arrangement (200) is detachably supported on the vehicle body by suitable joints (315, 317)
4. The two wheeler interlocking brake system as claimed in claim 1, wherein said equaliser (255) is connected with the push rod fork (213) forming a flexible T-shaped structure.
'5. The two wheeler interlocking brake system as claimed in claim 1, wherein said holding spring (211) includes one end hinged with said push rod fork (213) and other end supported on the said bracket arrangement (200)

6. The two wheeler interlocking brake system as claimed in claim 1, wherein the brake pedal (113) supported on the two wheeler body is hinged with said equaliser middle segment (255b)
7. The two wheeler interlocking brake system as claimed in claim 1, wherein a equaliser's lower segment (255a) is connected with the upper segment of the brake rod (Ilia) supplying braking force to the rear brake circuit.
8. The two wheeler interlocking brake system as claimed in any of the above claims, wherein the variable mechanical ratio on the equaliser (251) allows the rear brake application to start first with a delayed front brake application.
9. The two wheeler interlocking brake system as claimed in claim 1, wherein said delay valve (217) is mounted at a suitable location on said two wheeler body.
10. A two wheeler interlocking brake system comprising:
a bracket arrangement (200), wherein a holding spring (211), a push rod fork (213) and
a master cylinder (215) are mounted on said bracket arrangement;
wherein said push rod fork (213) is connected with said holding spring (211) on one
end and said master cylinder (215) on the other end;
wherein an equaliser (255) is connected with said push rod fork (211) forming a flexible
T-shaped structure;
wherein a delay valve (217) and an oil reservoir (219) are mounted at a suitable location
on the two wheeler.