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"

FIELD OF INVENTION
[0001] 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
[0002] 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. [0003] 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 are typically used.
[0004] In last few decades, a gradual evolution in automobile industry is being carried 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), achieves deceleration of only rear wheel. 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), may leads to an accident.
[0005] 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 to 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.

[0006] 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 structure etc. In other words, it increases complexity that also makes the system more expensive.
[0007] Hence there is need to devise an integrated master cylinder assembly for two wheeled vehicle having compact structure with reduced complexity so as to mitigate aforementioned drawbacks reported in prior art.
OBJECTS OF THE INVENTION
[0008] An object of the present invention is to provide an integrated master cylinder assembly for two wheeled vehicle.
[0009] The another object of the present invention is to provide the integrated master cylinder assembly for two wheeled vehicle having compact structure and less complexity.
[00010] The another object of the present invention is to provide the integrated master cylinder assembly for two wheeled vehicle having ease for installation.
[00011] The another object of the present invention is to provide the integrated master cylinder assembly for two wheeled vehicle that is cost effective.
[00012] The another object of the present invention is to provide the integrated master cylinder assembly for two wheeled vehicle that is user friendly.
[00013] The another object of the present invention is to provide 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
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 configured to be get pulled by the synchronized deceleration actuator (120) during a synchronized deceleration; a second link (320) is mounted on the master body (210) at a first pivot (PI) such that the second link (320) is rotatable about the first pivot (PI), wherein the second link (320) is connected with the first link (310) at a first pin joint (HI); a third link (330) that is connected with the second link (320) through a pin (330a); a fourth link (340) that is connected with the second link (320) at a fourth pin joint (H4); a fifth link (350) that is that configured to be get pulled by the individual deceleration actuator (110) during an individual deceleration; 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. The first link (310) is configured to be get connected with the synchronized deceleration lever (120) through the synchronized deceleration cable (195) and the fifth link (350) is configured to be get connected with the individual deceleration lever (110) through the individual deceleration cable (195). The second link (320) is having at least one slot (320a) that is configured to enable travel of the pin (330a) during the individual deceleration. The second link (320) is configured to rotate about the first pivot (PI) in the direction of pulling force received from the second link (320) during the synchronized deceleration. The sixth link (360) is connected with the third link (330) and the fifth link (350) at a second pin joint (H2) 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 third link (330), so as to actuate the front brake caliper assembly (160) during the synchronized deceleration as well as the individual deceleration. The seventh link (370) is connected with the fourth link (340) at a fourth pin joint (H4) 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 fourth link (340), so as to actuate the rear brake caliper assembly (150) during the synchronized deceleration. The pin (330a) is configured to travel through the slot (320a) during the individual deceleration. The first link (310) and the fifth link (350) are arranged on the same side of the integrated master cylinder assembly (100).
BRIEF DESCRIPTION OF THE DRAWINGS
[00014] 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.
[00015] Fig. 1 shows an environment diagram of an integrated master cylinder assembly in a preferred embodiment of a present invention;
[00016] 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;
[00017] 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
[00018] 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
[00019] 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.
[00020] 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.
[00021] 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).
[00022] 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.
[00023] The term "a synchronized deceleration", hereinafter described, refers to the synchronized deceleration of the rear wheel and the front wheel of the vehicle.
[00024] The term "an individual deceleration", hereinafter described, refers to the individual deceleration of only front wheel of the vehicle.

[00025] Referring to Fig. 1 an environment diagram of an integrated master cylinder assembly is shown in the preferred embodiment of the present invention, The integrated master cylinder assembly (100) is connected with the synchronized deceleration actuator (120) and the individual deceleration actuator (110) through the synchronized declaration cable (195) and the individual deceleration cable (190) respectively. The integrated 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.
[00026] 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 pivot (PI, P2, P3) and plurality of links (310, 320, 330, 340, 350, 360, 370) operatively connected with each other through plurality of pin joints (H1, H2, H3, H4).
[00027] 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 (100) for deceleration of vehicle in the preferred embodiment of the present invention.
[00028] Referring to Fig. 1 through Fig. 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). The first link (310) is connected to the synchronous deceleration actuator (120) through the synchronized deceleration cable (195). The second link (320) that includes a slot (320a) is pivoted on the master body (210) at a first pivot (PI). The first link (310) is connected with the second link through the pin joint (HI). The third link

(330) is connected with the second link (320) by means of a pin (330a), wherein the pin (330a) is configured to travel through the slot (320a) of the second link (320) on the actuation of the individual deceleration actuator (110). The sixth link (360) is pivoted on the master body (210) at the second pivot (P2) such that a pushing surface (360a) of the sixth link (360) is abutted against a front master piston (410). The seventh link (370) is pivoted on the master body (210) at third pivot (P3) such that a pushing surface (370a) of the seventh link (370) remains abutted against a rear master piston (420). The third link (330) is further connected with the fifth link (350) and the sixth link (360) through a pin joint (H2). A spring (380) (not shown in Fig.) is coaxially disposed at the pin joint (H2) to restrict the slackening of the individual deceleration cable during the synchronized deceleration. The second link (320) is further connected with the fourth link (340) through a pin joint (H3). The fourth link (340) is further connected with the seventh link (370) through a pin joint (H4).
[00029] Referring to Fig. 1 through Fig. 4 an operational characteristic of the integrated master cylinder assembly (100) is explained.
[00030] During synchronized deceleration, the pressing of the synchronized deceleration actuator (120) causes pulling of the first link (310). As the second link (320) is connected with the first link (310), the second link (320) starts rotating around the first pivot (PI) in the direction of the pulling force received from the first link (310). Hence the pulling force received by the second link (320) gets transferred to the seventh link (370) through the fourth link (340) and the seventh link (370) starts to rotate around the third pivot (P3) in the direction of pulling force received from the fourth link (340). 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 second link (320) the third link (330) also gets pulled in the direction of rotation of the second link (320). The third link (330) further pulls the sixth link (360). Due to pulling force received from the third link (330), the sixth link (360) starts to rotate around the second pivot (P2) in the direction of pulling force received from the third link (330) and the

pushing surface (360a) pushes the front master piston (410) to actuate the front brake caliper assembly (160).
[00031] During the individual braking, the individual deceleration actuator (110) is pressed that causes pulling of the fifth link (350). The pulling force received by the fifth link (350) is further transferred to the sixth link (360). Hence the sixth link (360) starts to rotate around the second pivot (P2) in the direction of pulling force received from the fifth link (350). Then the front master piston (410) gets pressed by the pushing surface (360a) of the sixth link (360) to actuate the front brake caliper assembly (160).
[00032] 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 first link (310) and the fifth link (350) are arranged on the same side of the integrated master cylinder assembly (100), the said arrangement is provided to avoid the entanglement of the individual deceleration cable (190) and the synchronized deceleration cable (195). 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.
[00033] 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 (PI)
15. A second pivot (P2)
16. A third pivot (P3)
17. A first pin joint (HI)
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 second link (320)
23. A slot (320a)

24. A third link (330)
25. A pin (330a)
26. A fourth link (340)
27. A fifth link (350)
28. A sixth link (360)
29. A seventh link (370)
30. A pushing surface (360a) (Not shown in Figure)
31. A pushing surface (370a) (Not shown in Figure)
32. A spring (380) (Not shown in Figure)
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 configured to be get pulled by the synchronized deceleration actuator (120) during a synchronized deceleration;
a second link (320) is mounted on the master body (210) at a first pivot (PI) such that the second link (320) is rotatable about the first pivot (PI), wherein the second link (320) is connected with the first link (310) at a first pin joint (HI);
a third link (330) that is connected with the second link (320) through a pin (330a);
a fourth link (340) that is connected with the second link (320) at a fourth pin joint(H4);
a fifth link (350) that is that configured to be get pulled by the individual deceleration actuator (110) during an individual deceleration;
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 configured to be get connected with the synchronized deceleration lever (120) through the synchronized deceleration cable (195) and the fifth link

(350) is configured to be get connected with the individual deceleration lever (110) through the individual deceleration cable (190).
3. The integrated master cylinder assembly (100) as claimed in claim 1, wherein the second link (320) is having at least one slot (320a) that is configured to enable travel of the pin (330a) during the individual deceleration.
4. The integrated master cylinder assembly (100) as claimed in claim 1, wherein the second link (320) is configured to rotate about the first pivot (PI) in the direction of pulling force received from the second link (320) during the synchronized deceleration.
5. The integrated master cylinder assembly (100) as claimed in claim 1, wherein the sixth link (360) is connected with the third link (330) and the fifth link (350) at a second pin joint (H2) such that the pushing surface (360a) of the sixth link (360) abuts against the front master piston (410).
6. 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 third link (330), so as to actuate the front brake caliper assembly (160) during the synchronized deceleration as well as the individual deceleration.
7. The integrated master cylinder assembly (100) as claimed in claim 1, wherein the seventh link (370) is connected with the fourth link (340) at a fourth pin joint (H4) such that a pushing surface (370a) of the seventh link (370) abuts against the rear master piston (420).
8. 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 fourth link (340), so as to actuate the rear brake caliper assembly (150) during the synchronized deceleration.
9. The integrated master cylinder assembly (100) as claimed in claim 1, wherein the
pin (330a) is configured to travel through the slot (320a) during the individual
deceleration.
10. The integrated master cylinder assembly (100) as claimed in claim 1, wherein
the first link (310) and the fifth link (350) are arranged on the same side of the
integrated master cylinder assembly (100).