DESC:FIELD OF DISCLOSURE
The present invention relates to combined braking system for a two wheeler. More particularly, the present invention relates to a combined braking system; with front hydraulically operated disc brake assembly having three piston caliper and rear mechanically operated drum brake.
BACKGROUND OF THE INVENTION
In an effort to synchronize between front and rear braking system a ‘braking system’ which actuates two braking systems i.e. front and rear by different mechanisms ‘combined braking system’ has been brought out. One such unique system of ‘combined braking system’ is disclosed in the present invention which aims to provide a safe and easy braking system for the rider.
Existing combined braking system generally incorporate various combinations of hydraulically operated disc/drum brake on front or rear wheel braking system and mechanically operated drum brake on rear or front wheel braking system.
One such prior art exists where front wheel is equipped with hydraulically operated disc brake and rear wheel is equipped with hydraulically operated drum brake with a CBS actuating means provided on foot pedal as disclosed in 3130/MUM/2015 titled “Combined brake system for a two wheeler” .
742/DEL/1997 titled “Front-rear interlocked brake apparatus for vehicle” discloses another prior art having hydraulically operated disc brake on the front wheel and mechanically operated drum brake on the rear wheel with CBS actuating means provided on the foot pedal. The limitation of the above mentioned prior art is that the equalizer is rotatably supported on a link which in turn is connected to the transmission arm. As one end of the equalizer is connected directly to the piston of the master cylinder CBS and other end to the rear side transmission member, the weight of the equalizer and link acts on the piston of master cylinder CBS. As the piston reciprocates in the master cylinder CBS, the sliding friction increases at the surface where the piston is sliding in the master cylinder CBS due to the weight acting on it. Eventually, the piston wears and the oil seal does not remain effective to seal the brake fluid and the brake line pressure is lost. This results in the loss of braking performance.
333/CHE/2013 titled “Brake device for motorcycle” discloses another prior art having hydraulically operated disc brake on the front wheel and mechanically operated drum brake on the rear wheel with CBS actuating means provided on the foot pedal. The patent connects the equalizer directly on the transmission arm of the brake pedal in a rotatable manner.
4312/CHE/2013 titled “Combined brake system for saddle-ride type vehicle” discloses another prior art having hydraulically operated disc brake on the front wheel and mechanically operated drum brake on the rear wheel with CBS actuating means provided on the foot pedal. The patent connects one end of the equalizer to piston of the master cylinder CBS for applying the braking force to the front wheel brake.
The present invention intends to overcome limitations of prior art, provides an advancement over the prior art and discloses a solution wherein CBS means are provided to be readily adaptable for combined braking system.
Some of the objects of the present disclosure are described below:
It is the objective of the current invention to provide safe braking means to be used in two-wheeler.
It is another objective of the current combined braking system to provide for better braking response in two wheeler as compared to the conventional braking system.
It is yet another objective of the current invention to provide front braking means incorporating disc brake with piston caliper for facilitating separate front brake application and a separate combined brake application.
It is further objective of the current invention to provide hydraulically operated disc brake readily adaptable to be used as front wheel braking means that is adaptable with drum brake as rear braking means.
It is another objective of the present invention to provide a combined braking system capable of force multiplication at master cylinder CBS for front braking operation.
It is yet another objective of the present invention to provide a combined braking system that utilizes the variation of lever ratio for the purpose of effectively modifying the brake force applied during combined braking.
It is further objective of the current invention to alter the preload of the delay spring by adjusting the effective length of the secondary link.
BRIEF DESCRIPTION OF THE INVENTION
As illustrated in Figure No. 1, an illustrative complete view of a hydraulically operated disc brake with combined braking means is provided. The master cylinder CBS (90) is connected to the primary link (130) through clevis pin (115). The primary link (130) is connected to the secondary link (140) by a clevis pin (125). The delay means (135) delays the action of primary link and acts as a compression structure. The secondary link (140) is connected to one end of the equalizer (160) by clevis pin (145). The equalizer (160) is connected to the transmission arm (185) through transmission arm connecting link (175) and clevis pins (150) and (170) respectively. The pedal (190) is pivoted around transmission arm at point (180). The other end of the equalizer (160) is connected to rear braking system. The master cylinder CBS (90) is filled with hydraulic fluid. When force is applied on the pedal (190), the primary link (130) connected with secondary link (140) after delaying effect moves in the direction of movement represented by arrow as shown in the Figure 1. This movement compresses the piston (110) of the master cylinder CBS (90) and generates pressure in the hydraulic line (70), this pressure exerts force on piston (50B) of the front brake caliper (50) which in turn has a braking effect on the front wheel(not shown) by slowing down the rotating brake disc (60). At the same time the cam (220) of the rear drum brake (200) is rotated by the pulling action of the rear side transmission member (195) and drum brake lever (210), to apply brake on the rear wheel (not shown).
In other embodiment as illustrated in Figure No. 9, an illustrative complete view of a hydraulically operated disc brake with combined braking means is provided. The master cylinder CBS (90) is connected to the primary link (130) through clevis pin (115). The primary link (130) is connected to the secondary link (140) by a clevis pin (125). The delay means (135) delays the action of primary link and acts as a tension structure. The secondary link (140) is connected to one end of the equalizer (160) by clevis pin (145). The equalizer (160) is connected to the transmission arm (185) through transmission arm connecting link (175) and clevis pins (150) and (170) respectively. The pedal (190) is pivoted around transmission arm at point (180). The other end of the equalizer (160) is connected to rear braking system. The master cylinder CBS (90) is filled with hydraulic fluid. When force is applied on the pedal (190), the primary link (130) connected with secondary link (140) after delaying effect moves in the direction of movement represented by arrow as shown in the Figure 9. This movement compresses the piston (110) of the master cylinder CBS (90) and generates pressure in the hydraulic line (70), this pressure exerts force on piston (50B) of the front brake caliper (50) which in turn has a braking effect on the front wheel(not shown) by slowing down the rotating brake disc (60). At the same time the cam (220) of the rear drum brake (200) is rotated by the pulling action of the rear side transmission member (195) and drum brake lever (210), to apply brake on the rear wheel (not shown).
In other embodiment as illustrated in Figure No. 10, an illustrative complete view of a hydraulically operated disc brake with combined braking means is provided. The master cylinder CBS (90) is connected to the primary link (130) through clevis pin (115). The primary link (130) is connected to the secondary link (140) by a clevis pin (125). The delay means (135) delays the action of primary link and acts as a torsional structure. The secondary link (140) is connected to one end of the equalizer (160) by clevis pin (145). The equalizer (160) is connected to the transmission arm (185) through transmission arm connecting link (175) and clevis pins (150) and (170) respectively. The pedal (190) is pivoted around transmission arm at point (180). The other end of the equalizer (160) is connected to rear braking system. The master cylinder CBS (90) is filled with hydraulic fluid. When force is applied on the pedal (190), the primary link (130) connected with secondary link (140) after delaying effect moves in the direction of movement represented by arrow as shown in the Figure 10. This movement compresses the piston (110) of the master cylinder CBS (90) and generates pressure in the hydraulic line (70), this pressure exerts force on piston (50B) of the front brake caliper (50) which in turn has a braking effect on the front wheel(not shown) by slowing down the rotating brake disc (60). At the same time the cam (220) of the rear drum brake (200) is rotated by the pulling action of the rear side transmission member (195) and drum brake lever (210), to apply brake on the rear wheel (not shown).
The present invention overcomes the limitations of the prior art by pivoting the primary link (130) at clevis pin (115) which takes the weight of the secondary link (140), equalizer (160) and transmission arm connecting link (175). This helps in avoiding the wear and tear of piston seal and piston (110) of the master cylinder thus increasing its life and braking effectiveness.
Although the subject matter has been described in considerable detail with reference to certain preferred embodiments thereof, other embodiments are possible. As such, the spirit and scope of the appended claims should not be limited to the description of the preferred embodiment contained therein.
BRIEF DESCRIPTION OF THE DRAWINGS
Other aspects of the invention will become apparent by consideration of the accompanying drawings and their description stated below, which are merely illustrative of a preferred embodiment of the invention and do not limit in any way the nature and scope of the invention.
Figure 1 illustrates a complete view of a combined brake system in accordance with the present invention.
Figure 2 illustrates an isometric view of combined brake system master assembly, equalizer, transmission arm connecting link and pedal.
Figure 3 illustrates an isometric view of combined brake system master assembly.
Figure 4 illustrates a sectional view of combined brake system master assembly.
Figure 5 illustrates a front view of combined brake system master assembly wherein the lengths L1 and L2 contributing to the lever ratio is shown in accordance with the present invention.
Figure 6 demonstrates the force being transferred to rear wheel at initial movement of the pedal in accordance with the present invention.
Figure 7 illustrates the actuated position of the combined brake system master assembly in accordance with the present invention.
Figure 8 illustrates the front view of CBS master cylinder assembly showing delay means compressed.
Figure 9 illustrates the complete view of another embodiment of combined brake system master assembly in accordance with the present invention with delay means as tension spring arrangement.
Figure 10 illustrates the complete view of another embodiment of combined brake system master assembly in accordance with the present invention with delay means as torsional spring arrangement.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The invention will now be described with reference to the accompanying drawings which do not limit the scope and ambit of the invention. The description provided is purely by way of example and illustration.
Figure 1 illustrates a complete view of combined brake system in accordance with the present invention and is generally indicated by reference numeral (500). The combined brake system comprises of a hydraulic disc brake mounted on front wheel (not shown) of a two-wheeler and a mechanical drum brake mounted on rear wheel (not shown) of a two-wheeler. Master cylinder (30) is mounted on the handlebar (10). The piston caliper layout having pistons (50A), (50B) and (50C) has the hydraulic brake line (40) connects piston (50A) & (50C) of the front brake caliper (50) to the master cylinder (30) on the handlebar. Brake disc (60) is actuated by the front brake caliper (50). Piston (50B) of the front brake caliper (50) is connected to master cylinder CBS (90) through hydraulic brake line (70). Master cylinder CBS (90) is mounted to the vehicle (not shown) through mounting points (95A) and (95B). A reservoir (80) is connected to the master cylinder CBS (90) through brake hose (85) for providing hydraulic fluid. A spring (100) (as shown in Figure 4) abuts the piston (110) (as shown in Figure 4) placed inside the master cylinder CBS (90). A clevis bolt (120) is connected to the piston (110) (as shown in Figure 4) of the master cylinder CBS (90). The clevis bolt (120) is mounted on the primary link (130) through clevis pin (120A). The piston push rod (112) is attached by the clevis bolt (120) which pushes the piston (110) (as shown in Figure 4). The piston seal (105) (as shown in Figure 4) facilitates the fluid transfer from chamber (102) to (103) (as shown in Figure 4). The primary link (130) is connected to master cylinder CBS (90) through clevis pin (115). The primary link (130) is connected to the secondary link (140) by a clevis pin (125) and clevis bolt (131). A delay means (135) is provided for delaying the action of primary link. The secondary link (140) is connected to one end of the equalizer (160) by clevis pin (145) and a clevis bolt (141). The washer (142) provides a resting face for clevis bolt (141) in initial condition. The equalizer (160) is connected to the transmission arm (185) through transmission arm connecting link (175) and clevis pins (150) and (170) respectively. The pedal (190) and the transmission arm (185) are pivoted about point (180). The other end of the equalizer (160) is connected to the brake cam (220) of the drum brake (200) via rear side transmission member (195) and drum brake lever (210) through clevis bolt (165) and clevis pin (155). The master cylinder CBS (90) and master cylinder (30) is filled with hydraulic fluid. When force is applied on the pedal (190), the primary link (130) connected with secondary link (140) after delaying effect, moves in the direction of movement represented by arrow as shown in the figure 1. This movement compresses the piston (110) of the master cylinder CBS (90) exerting force on piston (50B) of the front brake caliper (50) which in turn has a braking effect on the front wheel(not shown). At the same time the cam (220) of the rear drum brake (200) is rotated by the pulling action of the rear side transmission member (195) and drum brake lever (210), to apply brake on the rear wheel (not shown).
Figure 2 illustrates a complete view of combined brake system master assembly, equalizer, transmission arm connecting link and pedal in accordance with the present invention and is generally indicated by reference numeral (500A). The isometric view comprises of combined brake system master assembly, equalizer, transmission arm connecting link and pedal.
Figure 3 illustrates an isometric view of combined brake system master assembly in accordance with the present invention and is generally indicated by reference numeral (500B).
Figure 4 illustrates a sectional view of combined brake system master assembly in accordance with the present invention and is generally indicated by reference numeral (500C). The perspective view comprises of the same components as depicted in figure 3 and are herein incorporated by reference.
Figure 5 illustrates a front view of combined brake system master assembly wherein the lengths L1 and L2 contributing to the lever ratio is shown in accordance with the present invention and is generally indicated by reference numeral (500D). The view comprises of the same components as depicted in figure 1 and are herein incorporated by reference. The lever distance L1:L2 ratio is adjusted by mounting the piston (110) of master cylinder CBS (90) at a specified distance on the primary link (130). By changing the lever distance ratios, the force applied on the piston (110) of the master cylinder CBS (90) can be varied and different braking performances can be achieved.
Figure 6 illustrates a front view of CBS master cylinder assembly along with equalizer, transmission arm connecting link (175), rear side transmission member (195), transmission arm (185) and pedal (190) and is generally indicated by reference numeral (500E). This demonstrates the force being transferred to rear wheel at initial movement of the pedal (190). The equalizer (160) moves in a rotatable manner and pin (145) acts as a pivot for equalizer.
Figure 7 illustrates front view of CBS master cylinder assembly along with equalizer, transmission arm connecting link (175), rear side transmission member (195), transmission arm (185) and pedal (190) and is generally indicated by reference numeral (500F). It shows the actuated position of the combined brake system master assembly in accordance with the present invention. This demonstrates the force being transferred to both front and rear brakes after considerable pedal stroke.
Figure 8 illustrates the front view of CBS master cylinder assembly showing the positions of primary link (130), secondary link (140) and the delay means compressed and is generally indicated by reference numeral (500G).
Figure 9 illustrates the complete view of another embodiment of combined brake system master assembly in accordance with the present invention and is generally indicated by reference numeral (1000). The combined brake system comprises of a hydraulic disc brake mounted on front wheel (not shown) of a two-wheeler and a mechanical drum brake mounted on rear wheel (not shown) of a two-wheeler. Master cylinder (30) is mounted on the handlebar (10). Hydraulic brake line (40) connects piston (50A) & (50C) of the front brake caliper (50) to the master cylinder (30) on the handlebar. Brake disc (60) is actuated by the front brake caliper (50). Piston (50B) of the front brake caliper (50) is connected to master cylinder CBS (90) through hydraulic brake line (70). Master cylinder CBS (90) is mounted to the vehicle (not shown) through mounting points (95A) and (95B). A reservoir (80) is connected to the master cylinder CBS (90) through brake hose (85) for providing hydraulic fluid. A spring (100) abuts the piston (110) placed inside the master cylinder CBS (90). A clevis bolt (120) is connected to the piston (110) of the master cylinder CBS (90). The clevis bolt (120) is mounted on the primary link (130) through clevis pin (120A). The master cylinder CBS (90) is connected to the primary link (130) through clevis pin (115). The primary link (130) is connected to the secondary link (140) by a clevis pin (125). The delay means (135) delays the action of primary link and acts as a tension structure. The secondary link (140) is connected to one end of the equalizer (160) by clevis pin (145). The equalizer (160) is connected to the transmission arm (185) through transmission arm connecting link (175) and clevis pins (150) and (170) respectively. The pedal (190) is pivoted around transmission arm at point (180). The other end of the equalizer (160) is connected to the brake cam (220) of the drum brake (200) via rear side transmission member (195) and drum brake lever (210) through clevis bolt (165) and clevis pin (155). The master cylinder CBS (90) and master cylinder (30) is filled with hydraulic fluid. When force is applied on the pedal (190), the primary link (130) connected with secondary link (140) after delaying effect moves in the direction of movement represented by arrow as shown in the figure 9. This movement compresses the piston (110) of the master cylinder CBS (90) and generates pressure in the hydraulic line (70), this pressure exerts force on piston (50B) of the front brake caliper (50) which in turn has a braking effect on the front wheel(not shown) by slowing down the rotating brake disc (60). At the same time the cam (220) of the rear drum brake (200) is rotated by the pulling action of the rear side transmission member (195) and drum brake lever (210), to apply brake on the rear wheel (not shown).
Figure 10 illustrates the complete view of another embodiment of combined brake system master assembly in accordance with the present invention and is generally indicated by reference numeral (1500). The combined brake system comprises of a hydraulic disc brake mounted on front wheel (not shown) of a two-wheeler and a mechanical drum brake mounted on rear wheel (not shown) of a two-wheeler. Master cylinder (30) is mounted on the handlebar (10). Hydraulic brake line (40) connects piston (50A) & (50C) of the front brake caliper (50) to the master cylinder (30) on the handlebar. Brake disc (60) is actuated by the front brake caliper (50). Piston (50B) of the front brake caliper (50) is connected to master cylinder CBS (90) through hydraulic brake line (70). Master cylinder CBS (90) is mounted to the vehicle (not shown) through mounting points (95A) and (95B). A reservoir (80) is connected to the master cylinder CBS (90) through brake hose (85) for providing hydraulic fluid. A spring (100) abuts the piston (110) placed inside the master cylinder CBS (90). A clevis bolt (120) is connected to the piston (110) of the master cylinder CBS (90). The clevis bolt (120) is mounted on the primary link (130) through clevis pin (120A). The master cylinder CBS (90) is connected to the primary link (130) through clevis pin (115). The primary link (130) is connected to the secondary link (140) by a clevis pin (125). The delay means (135) delays the action of primary link and acts as a torsional spring arrangement structure. The secondary link (140) is connected to one end of the equalizer (160) by clevis pin (145). The equalizer (160) is connected to the transmission arm (185) through transmission arm connecting link (175) and clevis pins (150) and (170) respectively. The pedal (190) is pivoted around transmission arm at point (180). The other end of the equalizer (160) is connected to the brake cam (220) of the drum brake (200) via rear side transmission member (195) and drum brake lever (210) through clevis bolt (165) and clevis pin (155). The master cylinder CBS (90) and master cylinder (30) is filled with hydraulic fluid. When force is applied on the pedal (190), the primary link (130) connected with secondary link (140) after delaying effect moves in the direction of movement represented by arrow as shown in the figure 10. This movement compresses the piston (110) of the master cylinder CBS (90) and generates pressure in the hydraulic line (70), this pressure exerts force on piston (50B) of the front brake caliper (50) which in turn has a braking effect on the front wheel(not shown) by slowing down the rotating brake disc (60). At the same time the cam (220) of the rear drum brake (200) is rotated by the pulling action of the rear side transmission member (195) and drum brake lever (210), to apply brake on the rear wheel (not shown).
TECHNICAL ADVANTAGES
The technical advancements offered by the present disclosure include:
? Safe and easy braking system for the rider to be used in two-wheeler;
? The equalizer is coupled to the secondary link and the secondary link is coupled to the primary link which is further coupled to the mounting given on the master cylinder casing. Due to this type of arrangement, the weight of the equalizer does not act directly on the master cylinder, and thereby lowering the sliding friction and also lowering eventual wear of the piston;
? The preload of the delay spring can be altered by changing the effective length of secondary link;
? The force from the equalizer gets amplified by a factor before it reaches the master piston, this factor is achieved because of the lever ratio of the primary link;
? The three piston calliper arrangement facilitates separate front brake application and a separate combined brake application;
? The utilization of various point of connection of the primary link with the master cylinder and that of equalizer with the transmission arm connecting link in the present invention effectively modifies the brake force applied during combined braking to get the desired brake force distribution.
In view of the wide variety of embodiments to which the principles of the present disclosure can be applied, it should be understood that the illustrated embodiments are exemplary only. The numerical values of the test analysis done are only approximations and it is envisaged that the values higher or lower than the numerical values assigned to the parameters, dimensions and quantities fall within the scope of the disclosure.
Throughout this specification the word “comprise”, or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
Any discussion of documents, acts, materials, devices, articles or the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
The numerical values given of various physical parameters, dimensions and quantities are only approximate values and it is envisaged that the values higher or lower than the numerical value assigned to the physical parameters, dimensions and quantities fall within the scope of the disclosure unless there is a statement in the specification to the contrary.
While considerable emphasis has been placed herein on the specific features of the preferred embodiment, it will be appreciated that many additional features can be added and that many changes can be made in the preferred embodiment without departing from the principles of the disclosure. These and other changes in the preferred embodiment of the disclosure 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 disclosure and not as a limitation.
LIST OF REFERENCE NUMERAL

10- Handle Bar
20- Brake Lever
30- Master Cylinder
40- Hydraulic Brake Line
50- Front Brake Caliper
50A, 50B, 50C- Caliper Piston
60- Brake Disc
70- Hydraulic Brake Line
80- Reservoir for Master Cylinder CBS
85- Reservoir Brake Hose
90- Master Cylinder CBS
95A, 95B- Mounting for Master Cylinder CBS
100- Spring for Master Cylinder CBS
102,103-Fluid Chamber
105-Piston seal
110- Piston of Master Cylinder CBS
112-Piston push rod
115, 120A, 125, 145, 150,155, 170- Clevis Pins
120, 131, 141, 165 – Clevis Bolt
130- Primary link
132, 142- Washer
135- Delay Means
140- Secondary Link
160- Equalizer
175- Transmission Arm Connecting Link
180- Pedal Pivot
185- Transmission Arm of Pedal
190- Pedal Arm
195- Rear Side Transmission Member
200- Drum Brake
210- Drum Brake Lever
220- Brake Cam

,CLAIMS:We claim:
1. A combined braking system 500 comprising:
• a front hydraulic disc brake and a rear mechanical drum brake 200, with a piston caliper layout,
• a master cylinder assembly 500G,
• the said master cylinder assembly 500G comprising a primary link 130 which is connected to a master cylinder 90 and also to a secondary link 140,
• a delay spring 135 which hereby acts as compression spring arrangement in the said master cylinder assembly 500G,
• an equalizer 160 is connected to a transmission arm 185 through a transmission arm connecting link 175,
• the secondary link 140 is connected to one end of the said equalizer 160 and other end of the said equalizer is connected to the rear side transmission member 195 which transfers force to the rear drum brake 200,
wherein the secondary link 140 forms an integral part of the master cylinder assembly 500G.
2. The combined braking system 500 as claimed in claim 1 wherein the secondary link 140 is coupled to the primary link 130 whose initial position depends on position of master cylinder casing 90 and clevis bolt surface which is further coupled to the mounting on the master cylinder 90 body.
3. The combined braking system 500 as claimed in claim 1 wherein the preload of the delay means 135 can be altered by changing the effective length of secondary link 140.
4. A combined braking system 1000 comprising:
• a front hydraulic disc brake and a rear mechanical drum brake 200, with a piston caliper layout,
• a master cylinder assembly 500G,
• the said master cylinder assembly 500G comprising a primary link 130 which is connected to a master cylinder 90 and also to a secondary link 140,
• a delay spring 135which hereby acts as tension spring arrangement arrangement in the said master cylinder assembly 500G,
• an equalizer 160 is connected to a transmission arm 185 through a transmission arm connecting link 175,
• the secondary link 140 is connected to one end of the said equalizer 160 and other end of the said equalizer is connected to the rear side transmission member 195 which transfers force to the rear drum brake 200,
wherein the secondary link 140 forms an integral part of the master cylinder assembly 500G.
5. The combined braking system 1000 as claimed in claim 4 wherein the secondary link 140 is coupled to the primary link 130 whose initial position depends on position of master cylinder casing 90 and clevis bolt surface which is further coupled to the mounting on the master cylinder 90 body.
6. The combined braking system 1000 as claimed in claim 4 wherein the preload of the delay means 135 can be altered by changing the effective length of secondary link 140.
7. A combined braking system 1500 comprising:
• a front hydraulic disc brake and a rear mechanical drum brake 200, with a piston caliper layout,
• a master cylinder assembly 500G,
• the said master cylinder assembly 500G comprising a primary link 130 which is connected to a master cylinder 90 and also to a secondary link 140,
• a delay spring 135which hereby acts as torsional spring arrangement arrangement in the said master cylinder assembly 500G,
• an equalizer 160 is connected to a transmission arm 185 through a transmission arm connecting link 175,
• the secondary link 140 is connected to one end of the said equalizer 160 and other end of the said equalizer is connected to the rear side transmission member 195 which transfers force to the rear drum brake 200,
wherein the secondary link 140 forms an integral part of the master cylinder assembly 500G.
8. The combined braking system 1500 as claimed in claim 7 wherein the secondary link 140 is coupled to the primary link 130 which is further coupled to the mounting on the master cylinder 90 body.
9. The combined braking system 1500 as claimed in claim 7 wherein the preload of the delay means 135 can be altered by changing the effective length of secondary link 140.