FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See Section 10; rule 13]
AN INTEGRATED MASTER CYLINDER ASSEMBLY

REFERENCE
[0001] This application is an addition of Indian Patent Application numbered 202021046218, having filing date of October 23, 2020.
FIELD OF INVENTION
[0002] The present invention relates to a master cylinder assembly and more particularly the present invention relates to the integrated master cylinder assembly.
BACKGROUND OF THE INVENTION
[0003] A deceleration system in vehicles inhibits motion by absorbing energy from the moving wheels of vehicle to decelerate the vehicle's momentum for stopping of moving vehicle. The deceleration system plays a crucial role in improving efficiency of the vehicles and providing auto safety in terms of prevention of road accidents, particularly for high-speed vehicles. [0004] In recent time, a gradual development has been carried out to provide an improved deceleration systems and methods for automotive vehicles. Various kinds of deceleration systems such as mechanical, hydraulic, anti-lock etc. have been gradually developed to meet the requirements of deceleration mechanism of vehicles in automobile industry. For actuation purpose drum-drum, disc-drum or disc-disc combinations is typically used.
[0005] In last few decades, a gradual evolution in automobile industry is being carrying out to provide an efficient deceleration system for two wheeled vehicles by means of synchronized deceleration system. In conventional deceleration system, the actuation of rear lever (on left handlebar in a scooter) or the pedal (foot-operated in a motorcycle), deceleration of only rear wheel will be achieved. If the force applied by the rider is high, the rear wheel would lock (because of reduction in rear wheel reaction due to weight transfer to the front during deceleration), leading to an accident.
[0006] In synchronized deceleration system in two wheeled vehicles both the front and rear wheel brakes are applied simultaneously or synchronously, hence it

reduces stopping distance of vehicle after application of brake and in turn reduces skidding and possibility of accidents in vehicles. According the government guidelines and as per IS 14664-2010, now it is mandatory to implement synchronized deceleration system in two wheelers below 125 CC capacity.
[0007] Various synchronized deceleration system with mechanical or hydraulic actuation arrangements have been reported in the prior art. In case of hydraulic type of synchronized deceleration system, a hydraulic master cylinder assembly is used. The major problem with designing of such system involves increased number of parts such as requirement of at least two reservoirs for front and rear wheel, complex arrangement of hoses, cable mounting structures etc. in other words, it increases complexity, that also makes the system more expensive. [0008] Hence there is need to devise an integrated master cylinder assembly that is having a compact structure and less complexity so as to reduce aforementioned drawbacks reported in prior art.
OBJECTS OF THE INVENTION
[0009] The main object of the present invention is to provide an integrated
master cylinder assembly for deceleration of a front and a rear wheels of the vehicle during a synchronized deceleration.
[00010] The another object of the present invention is the integrated master cylinder assembly for deceleration of the front wheel of the vehicle during individual deceleration.
[00011] The another object of the present invention is the integrated master cylinder assembly for deceleration of vehicle having compact structure and less complexity.
[00012] The another object of the present invention is the integrated master cylinder assembly for deceleration of vehicle that is suitable for scooter as well as motorcycle.

[00013] The another object of the present invention is the integrated master cylinder assembly for deceleration of vehicle that is cost effective.
[00014] The another object of the present invention is the integrated master cylinder assembly for deceleration of vehicle that is user friendly.
[00015] The another object of the present invention is the integrated master cylinder assembly that is suitably mountable on vehicle to achieve synchronous deceleration of rear and front wheels without affecting aesthetics of the said vehicle.
SUMMARY OF THE INVENTION
[00016] An integrated master cylinder assembly (100) includes a
master body (210) having at least one front master piston (410) and one rear master piston (420); at least one reservoir (220) having at least one front input hose (220a) and at least one rear input hose (220b), wherein the reservoir (220) is connected with the master body (210) through the front input hose (220a) and the rear input hose (220b); a first link (310) that is connected with an individual deceleration actuator (120), wherein the first link (310) is configured to be get pulled by the individual deceleration actuator (120) during an individual deceleration; a second link (320) that is connected with a synchronized deceleration actuator (110), wherein the second link (320) is configured to get pulled by the synchronized deceleration actuator (110) during a synchronized deceleration; a third link (330) is mounted on the master body (210) at a first pivot (P1) such that the third link (330) is rotatable about the first pivot (P1), wherein the third link (330) is connected to the second link (320) at a third pin joint (H3); a fourth link (340) having at least one pin (340a) is operatively connected with the first link (310) and the third link (330); a fifth link (350) that is connected with the third link (330) at a pin joint (H4); a sixth link (360) having at least one pushing surface (360a) is mounted on master body (210) at a second pivot (P2); a seventh link (370) having at least one pushing surface (370a) is mounted on master body (210) at a third pivot (P3); wherein said integrated master cylinder assembly (100) is configured to provide a synchronous deceleration as well as an individual deceleration. The first link (310) is connected

with the individual deceleration lever (120) through an individual deceleration cable (190) and the second link (320) is connected with the synchronized deceleration lever (110) through a synchronized deceleration cable (195). The third link (330) is having at least one slot (330a) and the first link (310) having at least one slot (310a). The slot (310a) is configured to facilitate travel of the pin (340a) of the fourth link (340) in the direction of the pulling force received from the third link (330) so as to isolate the first link (310) during the synchronized deceleration. The slot (330a) is configured to facilitate travel of the pin (340a) of the fourth link (340) in the direction of the pulling force received from the first link (310) so as to isolate the third link (330) during the individual deceleration. The third link (330) is configured to rotate about the first pivot (P1) in the direction of pulling force received from the second link (320) during the synchronized deceleration. The fourth link (340) is connected with the sixth link (360) at a first pin joint (H1) such that the pushing surface (360a) of the sixth link (360) abuts against the front master piston (410). The pushing surface (360a) is configured to push the front master piston (410) in proportion to the pulling force received from the fourth link (340), so as to actuate the front brake caliper assembly (150) during the synchronized deceleration as well as the individual deceleration. The seventh link (370) is connected with the fifth link (350) at a second pin joint (H2) such that a pushing surface (370a) of the seventh link (370) abuts against the rear master piston (420). The pushing surface (370a) is configured to push the rear master piston (420) in proportion to the pulling force received from the fifth link (350), so as to actuate the rear brake caliper assembly (160) during the individual deceleration.
BRIEF DESCRIPTION OF THE DRAWINGS
[00017] The accompanying drawings constitute a part of the description and are used to provide further understanding of the present invention. Such accompanying drawings illustrate the embodiments of the present invention which are used to describe the principles of the present invention together with the description.

[00018] Fig. 1 shows an environment diagram of an integrated master cylinder assembly for deceleration of vehicle in a preferred embodiment of a present invention;
[00019] Fig. 2 shows a front perspective view of the integrated master cylinder assembly for deceleration of vehicle in the preferred embodiment of the present invention;
[00020] Fig. 3 shows a front view of the integrated master cylinder assembly for deceleration of vehicle in the preferred embodiment of the present invention; and
[00021] Fig. 4 shows a back perspective view of the integrated master cylinder assembly for deceleration of vehicle in the preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[00022] As used in the description herein and throughout the claims that follow, the meaning of "a," "an," and "the" includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of "in" includes "in" and "on" unless the context clearly dictates otherwise.
[00023] If the specification states a component or feature "may", "can", "could", or "might" be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[00024] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. This disclosure may however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those of ordinary skill in the art. Moreover, all statements herein reciting embodiments of the disclosure, as well as specific examples thereof, are intended to encompass both structural and functional

equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure).
[00025] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[00026] The term "a synchronized deceleration", hereinafter described, refers to the synchronized deceleration of the rear wheel and the front wheel of the vehicle.
[00027] The term "an individual deceleration", hereinafter described, refers to the individual deceleration of only front wheel of the vehicle.
[00028] Referring to Fig. 1 an environment diagram of an integrated master cylinder assembly for deceleration of vehicle is shown in the preferred embodiment of the present invention. Referring to Fig. 1 an individual master cylinder assembly (100) for deceleration of vehicle is connected with a synchronized deceleration actuator (110) and an individual deceleration actuator (120) through a synchronized declaration cable (195) and an individual deceleration cable (190) respectively. The individual master cylinder assembly (100) is connected with a rear brake caliper assembly (150) and a front brake caliper assembly (160) through a rear wheel deceleration hose (180) and a front wheel deceleration hose (170) respectively. The individual master cylinder assembly (100) is configured for a synchronized deceleration as well as individual deceleration of the vehicle.
[00029] The Fig. 2 shows a front perspective view of the integrated master cylinder assembly (100) for deceleration of vehicle in the preferred embodiment of the present invention. The integrated master cylinder assembly (100) broadly includes a master body (210), a reservoir (220), a front input hose (220a), a rear input hose (220b), plurality of pivots (P1, P2, P3) and plurality of links (310, 320,

330, 350. 360, 370) operatively connected with each other through plurality of pin joints (H1, H2,H3,H4).
[00030] The Fig. 3 shows a front view of the integrated master cylinder assembly (100) for deceleration of vehicle, whereas Fig. 4 shows a back perspective view of the integrated master cylinder assembly for deceleration of vehicle in the preferred embodiment of the present invention.
[00031] Referring to Fig. 2 through 4, the reservoir (220) is connected with the master body (210) through the front input hose (220a) and the rear input hose (220b). The master body (210) includes at least one front inlet (430), at least one front outlet (440), at least one rear inlet (450) and at least one rear outlet (460). A second link (320) is connected to the synchronized deceleration actuator (110) through a synchronized deceleration cable (195). A first link (310) having a slot (310a) is connected to the individual deceleration actuator (120) through an individual deceleration cable (190).
[00032] A third link (330) is mounted on the master body (210) at the first pivot (P1) such that the third link (330) is rotatable around the first pivot (P1), wherein the third link (330) includes a slot (330a) (not shown in Fig.). A fourth link (340) having pin (340a) is operatively connected with the first link (310) and the third link (330) through the pin (340a). A fifth link (350) is connected with the third link (330) at a pin joint (H4). A sixth link (360) and a seventh link (370) are having at least one pushing surface (360a) and (370a) are mounted on master body (210) at a second pivot (P2) and a third pivot (P3) respectively.
[00033] The third link (330) is configured to rotate around the first pivot (P1) in the direction of pulling force received from the second link (320) during the synchronized deceleration. The slot (310a) of the first link (310) facilitates the travel of the pin (340a) of the fourth link (340), wherein the slot (310a) is configured to isolate the first link (310) during the synchronized deceleration so as to prohibit slackening of the individual deceleration cable (190).

[00034] The slot (330a) (not shown in Fig.) of the third link (330) is configured to facilitate travel of the pin (340a) of the fourth link (340) in the direction of the pulling force received from the first link (310) so as to isolate third link (330) that further prohibits slackening of the synchronized cable (195) during the individual deceleration.
[00035] The fourth link (340) is connected with the sixth link (360) at a first pin joint (H1) such that the pushing surface (360a) of the sixth link (360) is rotatable around the second pivot (P2) in the direction of the pulling force received from the fourth link (340) and abuts against the front master piston (410). The pushing surface (360a) is configured to push the front master piston (410) in proportion to the pulling force received from the fourth link (340), so as to actuate the front brake caliper assembly (150) during the individual deceleration as well as the synchronized deceleration. The seventh link (370) is connected with the fifth link (350) at a second pin joint (H2) such that a pushing surface (370a) of the seventh link (370) is rotatable around the third pivot (P3) in the direction of the pulling force received from the fifth link (350) and abuts against the rear master piston (420). The pushing surface (370a) is configured to push the front master piston (420) in proportion to the pulling force received from the fifth link (350), to actuate the rear brake caliper assembly (160) during the synchronized deceleration.
[00036] Now referring to Fig. 1 through Fig. 2A the operational characteristics of the integrated master cylinder assembly (100) is explained for synchronized deceleration as well as individual deceleration. During synchronized deceleration, the pressing of the synchronized deceleration actuator (120) causes pulling of the second link (320). As the third link (330) is connected with the second link (320) hence the third link (330) starts rotating around the first pivot (P1) in the direction of the pulling force received from the second link (320). Hence the pulling force received by the third link (330) gets transferred to the seventh link (370) through the fifth link (350) and the seventh link (370) starts to rotate around the third pivot (P3) in the direction of pulling force received from the fifth link (350). Hence the

rear master piston (420) gets pressed by the pressing surface (370a) of the seventh link (370) to actuate the rear brake caliper assembly (150). Simultaneously, due to rotation of the third link (330) the fourth link (340) gets pulled in the direction of rotation of the third link (330). The fourth link (340) further pulls the sixth link (360). Due to pulling force received from the fourth link (340), the sixth link (360) starts to rotate around the second pivot (P2) in the direction of pulling force received from the fourth link (340) and the pushing surface (360a) pushes the front master piston (410) to actuate the front brake caliper assembly (160).
[00037] During the individual braking, the individual deceleration actuator (120) is pressed that causes pulling of the first link (310). The pulling force received by the first link (310) is further transferred to the sixth link (360) through the fourth link (340). Hence the sixth link (360) starts to rotate around the second pivot (P2) in the direction of pulling force received from the fourth link (340). Then the front master piston (410) gets pressed by the pressing surface (360a) of the sixth link (360) to actuate the front brake caliper assembly (160).
[00038] The advantage of the integrated master cylinder assembly (100) is compact design that enables the synchronized deceleration as well as the individual deceleration of the vehicle. The integrated master cylinder assembly (100) shall be suitably mounted on the vehicle to achieve synchronous deceleration of rear and front wheels of the said vehicle.
[00039] List of reference numerals:
1. An integrated master cylinder assembly (100)
2. An individual deceleration actuator (110)
3. A synchronized deceleration actuator (120)
4. A rear brake caliper assembly (150)

5. A front brake caliper assembly (160)
6. A front wheel deceleration hose (170)
7. A rear wheel deceleration hose (180)
8. An individual deceleration cable (190)
9. A synchronized deceleration cable (195)
10. A master body (210)
11. A reservoir (220)
12. A front input hose (220a)
13. A rear input hose (220b)
14. A first pivot (P1)
15. A second pivot (P2)
16. A third pivot (P3)
17. A first pin joint (H1)
18. A second pin joint (H2)
19. A third pin joint (H3)
20. A fourth pin joint (H4)
21. A first link (310)

22. A slot (310a)
23. A second link (320)
24. A third link (330)
25. A slot (330a)
26. A fourth link (340)
27. A pin (340a)
28. A fifth link (350)
29. A sixth link (360)
30. A seventh link (370)
31. A pushing surface (360a)
32. A pushing surface (370a)
33. A front master piston (410)
34. A rear master piston (420)
35. A front inlet (430)
36. A front outlet (440)
37. A rear inlet (450)
38. A rear outlet (460)

We Claim:
1. An integrated master cylinder assembly (100) comprising:
A master body (210) having at least one front master piston (410) and one rear master piston (420);
at least one reservoir (220) having at least one front input hose (220a) and at least one rear input hose (220b), wherein the reservoir (220) is connected with the master body (210) through the front input hose (220a) and the rear input hose (220b);
a first link (310) that is connected with an individual deceleration actuator (120). wherein the first link (310) is configured to be get pulled by the individual deceleration actuator (120) during an individual deceleration;
a second link (320) that is connected with a synchronized deceleration actuator (110), wherein the second link (320) is configured to get pulled by the synchronized deceleration actuator (110) during a synchronized deceleration;
a third link (330) is mounted on the master body (210) at a first pivot (P1) such that the third link (330) is rotatable about the first pivot (P1), wherein the third link (330) is connected to the second link (320) at a third pin joint (H3);
a fourth link (340) having at least one pin (340a) is operatively connected with the first link (310) and the third link (330);
a fifth link (350) that is connected with the third link (330) at a pin joint (H4);
a sixth link (360) having at least one pushing surface (360a) is mounted on master body (210) at a second pivot (P2); and
a seventh link (370) having at least one pushing surface (370a) is mounted on master body (210) at a third pivot (P3);
wherein said integrated master cylinder assembly (100) is configured to provide a synchronous deceleration as well as an individual deceleration.
2. The integrated master cylinder assembly (100) as claimed in claim 1, wherein the
first link (310) is connected with the individual deceleration lever (120) through an

individual deceleration cable (190) and the second link (320) is connected with the synchronized deceleration lever (110) through a synchronized deceleration cable (195).
3. The integrated master cylinder assembly (100) as claimed in claim 1, wherein the third link (330) is having at least one slot (330a) and the first link (310) having at least one slot (310a).
4. The integrated master cylinder assembly (100) as claimed in claim 1 and claim 3, wherein the slot (310a) is configured to facilitate travel of the pin (340a) of the fourth link (340) in the direction of the pulling force received from the third link (330) so as to isolate the first link (310) during the synchronized deceleration.
5. The integrated master cylinder assembly (100) as claimed in claim 1 and claim 3, wherein the slot (330a) is configured to facilitate travel of the pin (340a) of the fourth link (340) in the direction of the pulling force received from the first link (310) so as to isolate the third link (330) during the individual deceleration.
6. The integrated master cylinder assembly (100) as claimed in claim 1, wherein the third link is configured to rotate about the first pivot (P1) in the direction of pulling force received from the second link (320) during the synchronized deceleration.
7. The integrated master cylinder assembly (100) as claimed in claim 1, wherein the fourth link (340) is connected with the sixth link (360) at a first pin joint (H1) such that the pushing surface (360a) of the sixth link (360) abuts against the front master piston (410).
8. The integrated master cylinder assembly (100) as claimed in claim 1, wherein the pushing surface (360a) is configured to push the front master piston (410) in proportion to the pulling force received from the fourth link (340), so as to actuate

the front brake caliper assembly (150) during the synchronized deceleration as well as the individual deceleration.
9. The integrated master cylinder assembly (100) as claimed in claim 1, wherein the
seventh link (370) is connected with the fifth link (350) at a second pin joint (H2)
such that a pushing surface (370a) of the seventh link (370) abuts against the rear
master piston (420).
10. The integrated master cylinder assembly (100) as claimed in claim 1, wherein
the pushing surface (370a) is configured to push the rear master piston (420) in
proportion to the pulling force received from the fifth link (350), so as to actuate
the rear brake caliper assembly (160) during the individual deceleration.