DESC:FORM 2
The Patent Act 1970
(39 of 1970)
&
The Patent Rules, 2005

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

TITLE OF THE INVENTION
“HALFSHAFT ASSEMBLY FOR A VEHICLE”

Endurance Technologies Limited
E-92, M.I.D.C. Industrial Area, Waluj,
Aurangabad – 431136, Maharashtra, India

The following specification particularly describes and ascertains the nature of this invention and the manner in which it is to be performed.
Field of Invention

[001] The present invention is related to a halfshaft assembly for a vehicle. More particularly the invention is to provide a halfshaft assembly with improved the durability that minimizes backlash error and drastically reduce the maintenance of the halfshaft assembly in vehicles with rear mounted engines and rear wheel drive that are subjected to higher articulation angles.

Background of the Invention

[002] Halfshaft is a vital component for transmitting power from engine to wheel which rotates at around 2000 – 3000 rpm particularly in rear wheel drive vehicles. It transmits the power from engine to wheels. Halfshaft must operate through continuously changing angles as per the road conditions between the Transmission and Wheel hub assembly.

[003] Conventionally available halfshaft, particularly for rear drive vehicles, has tulip at each of its ends which makes the housing arrangement for the spider assembly. The convoluted boots are placed over the tulip which protects the tulip and spider assembly from dirt, water, and other contaminants and also prevents grease leakage. This joint works with three rollers to transmit the rotations from the input to the output. In such designs three rollers are mounted on a spider legs. There is a slide fit between rollers and spider legs. This slide fit allows rollers to rotate very freely on spider legs. This spider assembly fits inside the mouth with three matching pockets, which is integrated with a flange and shaft. This pocket allows the joint to operate at an angle, but it also allows axial movement in the pocket without sacrificing drive.

[004] But this conventional design has limitation for the higher articulation angle. It cannot have length flexibility by changing any single part. It works on the dynamic contact between parts which creates backlash and this backlash is the major concern for early wear out of child components. Further, this design has complicated structure to transfer torque under the angles with flexibility with articulation. Additionally, this design requires the grease at both sides of flanges for the smooth functioning of the spider and roller and dissipation of the heat generated due to friction. The grease being a serviceable parameter, needs to replace at regular intervals requiring replacement of large clamps with hubs at both sides which consequently leads to high maintenance cost. In addition, to hold the boots in proper and fixed location, it require specialized clamps calling for additional cost as the replacement of clamps is a costly affair.

[005] Hence, there is a long pending and unmet requirement of a product that addresses the drawbacks of the conventional designs of the driveshaft and provide simple, economic and maintenance free solution. The present invention as described below fulfils the requirement.

Objectives of the Invention

[006] The main objective of the present invention is to provide a halfshaft assembly for a vehicle.

[007] Another objective of the present invention is to provide a halfshaft assembly for a vehicle that works under higher articulation angles.

[008] Still another objective of the present invention is to provide a halfshaft assembly for a vehicle that improves product durability and minimizes backlash error.

[009] Yet the objective of the present invention is to provide a halfshaft assembly for a vehicle that improves product durability with improved strengthening and drastically reduces the maintenance and the cost associated with it.

[0010] Further, the objective of the present invention is to provide a half shaft assembly for a vehicle that is very simple in construction and require no specialized manufacturing processes and materials.

Brief Description of the Drawings

[0011] This invention is illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein and advantages thereof will be better understood from the following description when read in conjunction with the following drawings, wherein

[0012] Figure 1 shows the pictorial presentation of the halfshaft in a rear drive vehicle.

[0013] Figure 2a discloses perspective view of the first embodiment of the halfshaft assembly in accordance with the present invention.

[0014] Figure 2b discloses cut view of the first embodiment of the halfshaft assembly in accordance with the present invention.
[0015] Figure 2c shows sectional view of the first embodiment of the halfshaft assembly in accordance with the present invention.

[0016] Figure 2d shows the enlarged view of the tripod connector of the halfshaft assembly as per the present invention.

[0017] Figure 2e discloses exploded view of the first embodiment of the halfshaft assembly in accordance with the present invention.

[0018] Figure 3a shows the cut view of second embodiment of the halfshaft assembly as per the present invention.

[0019] Figure 3b discloses sectional view of second embodiment of the halfshaft assembly as per the present invention.

[0020] Figure 3c presents exploded view of second embodiment of the halfshaft assembly as per the present invention.

[0021] Figure 4a discloses the perspective view of the third embodiment of the halfshaft assembly in accordance with the present invention.

[0022] Figure 4b shows the cut view of the third embodiment of the halfshaft assembly in accordance with the present invention.

[0023] Figure 4c discloses sectional view of the third embodiment of the halfshaft assembly in accordance with the present invention.

[0024] Figure 4d presents exploded view of the third embodiment of the halfshaft assembly in accordance with the present invention.
[0025] Figure 5a shows the cut view of fourth embodiment of the halfshaft assembly in accordance with the present invention.

[0026] Figure 5b shows the sectional view of fourth embodiment of the halfshaft assembly in accordance with the present invention.

[0027] Figure 5c presents exploded view of fourth embodiment of the halfshaft assembly in accordance with the present invention.

Detailed Description of the Present Invention

[0028] Referring to Figs. 2a to 2e, a halfshaft assembly (100) comprises of a shaft (10), a housing (20), a housing yoke (30), a transmission flange assembly (40), a pair of tripod connectors (50a and 50b), a striker cap (60), a shaft yoke (70) and a wheel flange assembly (80). The housing yoke (30) has a stepped end (32). The stepped end is formed by the machining operation and is provided with holes (34). The said holes (34) are having threads from the inside to receive the bolt (24). The top surface (32a) of the stepped end is provided with a circular slot (36) for resting the spring (28). The said yoke has a pair of extended wings (38a and 38b) and each of the wings has a hole (39a and 39b) to accommodate the legs (50aa and 50ac) respectively of the tripod connector (50a). The holes (39a and 39b) are concentric holes.

[0029] The housing (20) has a cylindrical outer profile. However, it can have any outer surface profile selected from square, pentagon, hexagon, and like. The housing (20) has hollow square shape profile (22) from inside and at its right end it has a stepped profile (20S). The stepped profile (20S) of the housing (20) receives the stepped profile (32) of the housing yoke (30) and get locked there with the help of Allen bolt (24). The housing (20) houses a profiled block (25) and a spring (28). The profiled block (25) is preferably a square profiled block. The profile of the said block can be selected from a set of profiles of square, polygonal, or any profile that can increase the surface contact to maximize the load carrying or transmitting capability matching with inner hollow profile (22) of the housing (20). The block (25) is configured to slide within the internal profile (22) inside the housing (20). The block (25) has a hole (25a) with the splines (25b) on its inner surface to receive one end of the shaft (10). The housing (20) is made of steel and is provided with a groove (26) on the outer surface of the left end so as to lock the striker cap (60) with the housing (20). The striker cap (60) has a protruded profile (62) along its inner circumference that gets locked with the groove (26) of the housing (20). The striker cap (60) is made either of the metal or of the reinforced plastic and it has a hole (60H) through which the shaft (10) passes insides the housing (20).

[0030] The transmission flange assembly (40) has a pair of wings (42) and a stem (44). Each of the wings has a hole (46a and 46b) and a dust shield (48) is press fitted at the end of the stem (44). Said end of the stem (44) is configured to get connected with the output shaft of the transmission. The transmission flange assembly is connected with the yoke (30) of the housing (20) through tripod connector (50a). The legs of the tripod connector (50a) are hold in the holes (46a and 46b) of transmission flange assembly (40) and the holes (39a and 39b) of a housing yoke (30) through needle roller bearing or bush or any other like arrangement fulfilling the purpose.

[0031] Referring to Figs. 2b and 2c, the shaft (10) has a circular cross section throughout its length. The right end (10a) of the shaft (10) is configured to have splines (10ab) and curved step (10ac). The circlip groove (10ad) is provided in between the splines (10ab) and curved step (10ac). The end (10a) of the shaft (10) is press fitted in the block (25) inside the housing (20). The splines (10ab) on the right end (10a) of the shaft (10) are configured to mesh with the internal splines (25b) of the block (25). The circlip (11) locks the position of the right end (10a) of the shaft (10) inside the block (25) through the meshing splines (10ab and 25b). The curved step (10ac) works as the seat for the spring (28). Thus, the spring (28) rests against the curved step (10ac) of the shaft (10) and the spring seat (36) provided on the stepped portion (32) of the housing yoke (30).

[0032] The left end (10b) of the shaft (10) is configured to have splines (10ba). The circlip groove (10bb) is provided after the splines (10ba). The end (10b) of the shaft (10) is press fitted inside the stem (72) of the shaft yoke (70). The splines (10ba) on the left end (10b) of the shaft (10) are configured to mesh with the internal splines (72a) of the stem (72) of the shaft yoke (70). The circlip (11) locks the position of the left end (10b) of the shaft (10) inside the shaft yoke (70) through the meshing splines (10ba and 72a).

[0033] The shaft yoke (70) has a stem (72) and is formed by the forging operation. The said yoke has a pair of extended wings (70a and 70b) and each of the wings has a hole (74a and 74b) to house the legs (50ba and 50bc) respectively of the tripod connector (50b). The holes (70a and 70b) are concentric holes.

[0034] The wheel flange assembly (80) has a pair of wings (82) and a stem (83). Each of the wings has a hole (89a and 89b) and a dust shield (88) is press fitted on the stem (83). The wheel flange assembly has a splined portion (85) which is configured to get connected with the wheel hub of the vehicle. The wheel flange assembly is connected with the shaft yoke (70) through a tripod connector (50b). The legs of the tripod connector (50b) are getting hold in the holes (89a and 89b) of wheel flange assembly (80) and the holes (74a and 74b) of the shaft yoke (70) through needle roller bearing or bush or any other like arrangement fulfilling the purpose. A circlip (110) is fitted inside the groove provided on inner surface of the holes (89a, 89b, 74a, 74b, 46a, 46b, 39a and 39b) towards the outer end to restrict the axial movement of the needle roller bearing or the bush as the case may be.

[0035] Referring to Figs. 3a to 3c, the second embodiment of halfshaft assembly (100) comprises of a shaft (10), a housing (20), a housing yoke (30), a transmission flange assembly (40), a pair of tripod connectors (50a and 50b), a striker cap (60), a shaft yoke (70) and a wheel flange assembly (80). The housing yoke (30) has a stepped end (32). The stepped end is formed by the machining operation and is provided with holes (34). The said holes (34) are threaded from inside to accommodate the threaded stud of the Allen bolt (24). The top surface (32a) of the stepped end is provided with a circular slot (36) for resting the spring (28). The said yoke has a pair of extended wings (38a and 38b) and each of the wings has a hole (39a and 39b) to accommodate the legs (50aa and 50ac) respectively of the tripod connector (50a). The holes (39a and 39b) are concentric holes.

[0036] The housing (20) has a cylindrical outer profile. The housing (20) has hollow profile (22) from inside and at its right end it has a stepped profile (20S). The stepped profile (20S) of the housing (20) receives the stepped profile end (32) of the housing yoke (30) and get locked there with the help of Allen bolt (24). The shaft (10) has a circular cross section throughout its length. The right end (10a) of the shaft (10) is configured to have an integrated block (99). Thus, the shaft (10) and the block (99) together form a single integrated unit. The curved step (10ac) works as the seat for the spring (28). Thus, the spring (28) rests against the curved step (10ac) and the spring seat (36) provided on the stepped portion (32) of the housing yoke (30). The block (99) integrated with the shaft (10) is configured to slide within the corresponding hollow profile (22) inside the housing (20). The housing (20) is made of steel and is provided with a groove (26) on the outer surface of the left end so as to lock the striker cap (60) with the housing (20). The striker cap (60) has a protruded profile (62) along its inner circumferential surface that gets locked with the groove (26) of the housing (20). The striker cap (60) is made either of the metal or of the reinforced plastic and it has a hole (60H) through which the shaft (10) passes insides the housing (20).

[0037] In third embodiment of the invention (referring Figs. 4a to 4d), the housing (210) is cylindrical in profile. However, it can have any outer surface profile selected from square, pentagon, hexagon, and like. The housing (210) has hollow profile (214) from inside and its right end it has a pair of wings (212). The housing (210) encompasses a block (220) and the said block is press fitted in the inner square cavity (214) of the housing (210). The block (220) is provided with a circular slot (220a) that works as a seat for the spring (28). The housing (210) has a spring (28) incorporated therein and the said spring rests between the extreme right end of the shaft (10) and the spring seat (220a) provided on the block (220). The housing (210) is made of steel and is provided with a groove (26) on the outer surface of the left end so as to lock the striker cap (60) with the housing (210). The striker cap (60) has a protruded profile (62) along its inner circumference that gets locked with the groove (26) of the housing (210). The striker cap (60) is made either of the metal of or reinforced plastic and it has a hole (60H) through which the shaft (10) passes insides the housing (210). The circlip groove (10ad) is provided in between the splines (10ab) and curved step (10ac). The end (10a) of the shaft (10) is press fitted in the block (25) inside the housing (210). The splines (10ab) on the right end (10a) of the shaft (10) are configured to mesh with the internal splines (25b) of the block (25). The circlip (11) locks the position of the right end (10a) of the shaft (10) inside the block (25) through the meshing splines (10ab and 25b). The curved step (10ac) works as the seat for the spring (28). Thus, the spring (28) rests against the curved step (10ac) and the spring seat (220a) provided on the block (220) of the housing (210). The transmission flange assembly is connected with the housing (210) at its wings (212) through tripod connector (50a). The legs of the tripod connector (50a) are hold in the holes (46a and 46b) of transmission flange assembly (40) and the holes provided on the wings (212) of the housing (210) through needle roller bearing or bush or any other like arrangement fulfilling the purpose.

[0038] Referring to Figs. 5a to 5c, the fourth embodiment of the invention, the housing (210) is cylindrical in profile. However, it can have any outer surface profile selected from square, pentagon, hexagon, and like. The housing (210) has hollow profile (214) from inside and its right end it has a pair of wings (212). The housing (210) encompasses a block (220) and the said block is press fitted in the inner cavity of the housing (210). The block (220) is provided with a circular slot (220a) that works as a seat for the spring. The housing (210) has a spring (28) incorporated therein and the said spring rests between the extreme right end of the shaft (10) and the spring seat (220a) provided on the block (220). The housing (210) is made of steel and is provided with a groove (26) on the outer surface of the left end so as to lock the striker cap (60) with the housing (210). The striker cap (60) has a protruded profile (62) along its inner circumference that gets locked with the groove (26) of the housing (210). The striker cap (60) is made either of the metal or of reinforced plastic and it has a hole (60H) through which the shaft (10) passes insides the housing (210).

[0039] The right end (10a) of the shaft (10) is configured to have an integrated square block (99). Thus, the shaft (10) and the block (99) together form a single component. The curved step (10ac) provided on the right end of the shaft (10), particularly after the block (99) works as the seat for the spring (28). Thus, the spring (28) rests against the curved step (10ac) of the shaft (10) and the spring seat (220a) provided on the block (220) inside the housing (210).

[0040] The technical advantages achieved by the embodiments of the present invention and thereby inventive contribution to the technology domain are as under:
- It achieves higher articulation angles and improves product durability.
- Facilitate for higher torque and load taking capacity and minimizes the backlash error.
- The embodiments of the invention provides maintenance free product.
- The requirement of grease, hub, clamps, boots and spider roller units (as is required in the conventional units) is totally eliminated.
- The embodiments are effective in the vehicles that are operated on the undulating road surfaces (specifically on the roads in rural areas) where more articulation angle required due to uneven road surfaces.
- The embodiments has the applications in defence vehicles and vehicles that operate in higher altitude terrains with off-road applications. The embodiment facilitate to offer a higher ground clearance.
- The embodiments of the invention avoids backlash error and further wear out of child parts.
- The design of the embodiments is very simple, easy to manufacture and do not require any of the specialized processes of manufacturing, heat treatment and finishing.
- The design of the embodiments leads to significant reduction of weight thereby improving the vehicle fuel efficiency and drivability.

[0041] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein. ,CLAIMS:We Claim

1. A halfshaft assembly (100) for a vehicle, the vehicle with rear mounted engines and rear wheel drive, comprising of a shaft (10), a housing (20), a housing yoke (30), a transmission flange assembly (40), a pair of tripod connectors (50a and 50b), a striker cap (60), a shaft yoke (70) and a wheel flange assembly (80); wherein,
- the transmission flange assembly (40) is connected with the yoke (30) of the housing (20) through tripod connector (50a);
- the housing yoke (30) is press fitted inside the housing (20);
- the outer surface of the left end of the housing (20) is configured to have a groove (26) so as to lock the striker cap (60);
- the wheel flange assembly (80) is connected with the shaft yoke (70) through tripod connector (50b); and
- the shaft (10) is slideably connected with the shaft yoke (70) at its one end (10b) and the housing (20) at its other end (10a) to form the halfshaft assembly for a vehicle.

2. A half shaft assembly (100) for a vehicle, the vehicle with rear mounted engines and rear wheel drive, comprising of a shaft (10) with an integrated sliding block (99), a housing (20), a housing yoke (30), a transmission flange assembly (40), a pair of tripod connectors (50a and 50b), a striker cap (60), a shaft yoke (70) and a wheel flange assembly (80); wherein,
- the transmission flange assembly (40) is connected with the yoke (30) of the housing (20) through tripod connector (50a);
- the housing yoke (30) is press fitted inside the housing (20);
- the outer surface of the left end of the housing (20) is configured to have a groove (26) so as to lock the striker cap (60);
- the wheel flange assembly (80) is connected with the shaft yoke (70) through tripod connector (50b);
- the integrated block (99) of the shaft (10) is configured to slide in the profiled cavity (22) of the housing (20); and
- the shaft (10) is slideably connected with the shaft yoke (70) at its one end (10b) and the housing (20) at its other end (10a) to form the halfshaft assembly for a vehicle.

3. The halfshaft assembly (100) for a vehicle as claimed in any of the claims 1 and 2, wherein the housing yoke (30) has a machined stepped end (32); said step end (32) is provided with at least a hole (34) on its outer surface and the top surface (32a) of the stepped end (32) is provided with a circular slot (36) for resting the spring (28).

4. The halfshaft assembly (100) for a vehicle as claimed in claim 3, wherein the housing yoke (30) and the shaft yoke (70) has a pair of extended wings (38a, 38b and 70a, 70b respectively) and each of the wings has a hole (39a and 39b) to accommodate the legs (50aa and 50ac) respectively of the tripod connectors (50a and 50b respectively).

5. The halfshaft assembly (100) for a vehicle as claimed in claim 4, wherein
- the housing (20) has a profiled hollow cavity (22) inside it and said cavity (22) is configured to accommodate sliding block (25 or 99) of the shaft (10); and
- the housing (20) at its right end has a stepped profile (20S) from inside and said stepped profile (20S) of the housing (20) configured to receive the stepped profile (32) of the housing yoke (30) and get locked there with the help of Allen bolt (24) passing through the corresponding hole (34) on the stepped profile (32) of the housing yoke (30).

6. The halfshaft assembly (100) for a vehicle as claimed in claim 1, wherein the housing (20) houses the block (25) and a spring (28); said block (25) has a hole (25a) with the splines (25b) on its inner surface to receive splined end (10a) of the shaft (10).

7. The halfshaft assembly (100) for a vehicle as claimed in claim 5, wherein
- the left end (10b) of the shaft (10) is configured to have splines (10ba); said left end (10b) of the shaft (10) is press fitted inside the stem (72) of the shaft yoke (70) in such way that the splines (10ba) on the left end (10b) of the shaft (10) are meshed with the internal splines (72a) of the stem (72) of the shaft yoke (70); and
- the circlip (11) locks the position of the left end (10b) of the shaft (10) inside the shaft yoke (70) through the meshing splines (10ba and 72a).

8. The halfshaft assembly (100) for a vehicle as claimed in claim 6, wherein
- the shaft (10) has a circular cross section throughout its length; the right end (10a) of the shaft (10) is configured to have splines (10ab) and curved step (10ac); and
- the end (10a) of the shaft (10) is press fitted in the block (25) inside the housing (20) in such way that the splines (10ab) on the right end (10a) of the shaft (10) are meshed with the internal splines (25b) of the block (25).

9. The halfshaft assembly (100) for a vehicle as claimed in claim 8, wherein the spring (28) rests against the curved step (10ac) of the shaft (10) and the spring seat (36) provided on the top surface (32a) of the stepped portion (32) of the housing yoke (30).

10. A half shaft assembly (100) for a vehicle, the vehicle with rear mounted engines and rear wheel drive, comprising of a shaft (10), a housing (210) with a pair of extended wings (212), a transmission flange assembly (40), a pair of tripod connectors (50a and 50b), a striker cap (60), a shaft yoke (70) and a wheel flange assembly (80); wherein,
- the transmission flange assembly (40) is connected with the housing (210) through tripod connector (50a) at its wings (212);
- the housing (210) has a block (220) press fitted inside the housing (210) in the profiled hollow cavity (214) at right end of the housing (210); said block has circular slot (220a) on its inner top surface to accommodate the spring (28);
- the outer surface of the left end of the housing (210) is configured to have a groove (26) so as to lock the striker cap (60);
- the wheel flange assembly (80) is connected with the shaft yoke (70) through tripod connector (50b); and
- the shaft (10), is slideably connected the shaft yoke (70) at its one end (10b) and the housing (210) at its other end (10a) to form the halfshaft assembly for a vehicle.

11. A half shaft assembly (100) for a vehicle, the vehicle with rear mounted engines and rear wheel drive, comprising of a shaft (10) with an integrated sliding block (99), a housing (210) with a pair of extended wings (212), a transmission flange assembly (40), a pair of tripod connectors (50a and 50b), a striker cap (60), a shaft yoke (70) and a wheel flange assembly (80); wherein,
- the transmission flange assembly (40) is connected with the housing (210) through tripod connector (50a) at its wings (212);
- the housing (210) has a block (220) press fitted inside the housing (210) in the profiled hollow cavity (214) at its right end; said block (220) has a circular slot (220a) on its inner top surface to accommodate the spring (28);
- the outer surface of the left end of the housing (210) is configured to have a groove (26) so as to lock the striker cap (60);
- the wheel flange assembly (80) is connected with the shaft yoke (70) through tripod connector (50b);
- the integrated block (99) of the shaft (10) is configured to slide in the profiled cavity (214) of the housing (210); and
- the shaft (10) is slideably connected with the shaft yoke (70) at its one end (10b) and the housing (210) at its other end (10a) to form the halfshaft assembly for a vehicle.

12. The halfshaft assembly (100) for a vehicle as claimed in any of the claims 10 and 11, wherein
- the transmission flange assembly (40), the shaft yoke (70) and the wheel flange assembly (80) has a pair of extended wings (46, 70a and 82 respectively) and each of the wings has a hole to accommodate the legs of the tripod connectors (50a and 50b);
- the housing (210) has a profiled hollow cavity (214) inside it and said cavity (214) is configured to accommodate the sliding block (25 or 99) of the shaft (10);
- the housing (210) houses the block (25 or 99), the spring (28) and the block (220); said block (25) has a hole (25a) with the splines (25b) on its inner surface to receive splined end (10a) of the shaft (10) and the block (220) is configured to have a circular slot (220a) on its inner top surface;
- the left end (10b) of the shaft (10) is configured to have splines (10ba); said left end (10b) of the shaft (10) is press fitted inside the stem (72) of the shaft yoke (70) in such way that the splines (10ba) on the left end (10b) of the shaft (10) are meshed with the internal splines (72a) of the stem (72) of the shaft yoke (70); and the circlip (11) locks the position of the left end (10b) of the shaft (10) inside the shaft yoke (70) through the meshing splines (10ba and 72a);
- the shaft (10) has a circular cross section throughout its length; the right end (10a) of the shaft (10) is configured to have splines (10ab) and curved step (10ac); the end (10a) of the shaft (10) is press fitted in the block (25) inside the housing (20) in such way that the splines (10ab) on the right end (10a) of the shaft (10) are meshed with the internal splines (25b) of the block (25); and the circlip (11) locks the position of the right end (10a) of the shaft (10) inside the block (25) through the meshing splines (10ab and 25b); and
- the spring (28) rests against the curved step (10ac) of the shaft (10) and the circular slot (220a) provided on the inner top surface of the block (220) in the housing (210).

Dated this 5th day of May 2022

Sahastrarashmi Pund
Head – IPR
Endurance Technologies Ltd.

To,
The Controller of Patents,
The Patent Office, at Mumbai