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18. (WO2017145174) SPRING BASED REGENERATIVE BRAKING SYSTEM
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C laims :

1) A spring based regenerative braking system mounted on a rear wheel of a vehicle for utilizing energy stored during braking instances thereof, the spring based regenerative braking system comprising:

¾ a handle assembly having at least one brake lever, a brake cable, an asynchronous lever, an associated cable and a plurality of connecting rods;

a rear wheel assembly mounted along a sleeve mounted over a one way cam which is mounted on a hub over the central shaft of the rear wheel, the sleeve moving freely in rotation opposite to rotation of the wheel thereby locking the hub

¾ when rotating in the same direction as that of wheel, the rear wheel assembly having at least one spring cassette unit formed out of an inner casing, an outer casing and an energy saver spring, the energy saver spring configured to be uncoiled in a predefined direction during braking of the vehicle, the outer casing positioned with a discharge sprocket and a main drive sprocket on respective sides

¾ of vehi cl e frame and the rear wheel assembly;

a friction plate assembly positioned adjacent to the discharge sprocket along the central axis;

a roller wheel assembly connected to the rear wheel assembly through a first chain, the roller wheel assembly having a first wheel subassembly and a ttl second wheel subassembly interconnected through a second chain, the first wheel subassembly having a two drive sprocket connected to a first brake roller sprocket along a first horizontal shaft, the second wheel subassembly having a second drive sprocket connected to a second brake friction roller along a second horizontal shaft through a circlip arrangement terminating on extension of the roller wheel lever, the second wheel subassembly having a roller wheel lever connected to the second brake friction roller, the roller wheel ratchet having a latch lever, the latch lever engaging with the roller wheel ratchet through a latching arm thereof; and

¾ a discharge assembly having a discharge lever connected to a footrest attached thereto, the discharge lever having a discharge port pin engaged with the discharge sprocket of the rear wheel assembly,

wherein, the spring based regenerative braking system facilitating a Synchronous mode, an Asynchronous mode and a Discharge mode during

¾ uti I i zati on thereof.

2) The spring based regenerative system as claimed in claim 1, wherein the first horizontal shaft is mounted at a fulcrum of the roller wheel lever.

3) The spring based regenerative system as claimed in claim 1, wherein the roller wheel assembly is affixed to the vehicle frame at the fulcrum of roller wheel lever.

4) The spring based regenerative system as claimed in claim 1, wherein the second shaft of the second sub assembly is mounted at the far end of the roller wheel lever but substantially parallel to the first horizontal shaft.

5) The spring based regenerative braking system as claimed in claim 1, ttl wherei n the rear wheel assembly acts as an energy saver unit.

6) The spring based regenerative braking system as claimed in claim 1, wherein the roller wheel assembly acts as an energy transfer unit.

7) The spring based regenerative braking system as claimed in claim 1, wherein the energy saver spring coils up in a direction opposite to a forward motion of the wheel.

8) The spring based regenerative braking system as claimed in claim 1, ¾ wherein the rear wheel assembly is assembled such that the hub of the wheel is mounted over the non rotating central shaft through a plurality of bearings followed by mounting of the sleeve over the hub of the wheel through a one directional rotating bearings followed by mounting of the sprocket over the sleeve adjacent to the wheel followed by mounting of the spring cassette unit adjacent to ¾ a sprocket on the far end to the wheel and a second sprocket mounted adjacent to the spri ng cassette on the far end to the f i rst sprocket.

9) The spring based regenerative braking system as claimed in claim 1, wherein the friction plate assembly includes a first friction plate, a second friction plate and a spring brazed therebetween and mounted over a non rotating shaft

¾ adj acent to the f i rst f ri cti on pi ate al ong wi th a nut.

10) The spring based regenerative braking system as claimed in claim 1, wherein the first horizontal shaft is parallel to the second horizontal shaft.

11) The spring based regenerative braking system as claimed in claim 1, wherein the latch lever is configured to be actuated through a two position lever ttl thereby usi ng a connecti ng arrangement.

12) The spring based regenerative braking system as claimed in claim 1, wherein the discharge assembly is mounted on a cycle frame through a discharge port hinge base, a discharge port hinge, a locking hinge and a balancing spring. 13) The spring based regenerative braking system as claimed in claim 1, wherein the Synchronous mode facilitates braking during a gripped and compressed condition of the brake lever.

14) The spring based regenerative braking system as claimed in claim 1, ¾ wherei n the Synchronous mode faci I itates accel erati on duri ng a rel eased conditi on of the brake lever.

15) The spring based regenerative braking system as claimed in claim 1, wherein the Synchronous mode is such that an extent of acceleration is determi ned by number of turns of the energy saver spri ng.

¾ 16) The spring based regenerative braking system as claimed in claim 1, wherein the Asynchronous mode facilitates storage of energy in the energy saver spring without being released through the brake lever.

17) The spring based regenerative braking system as claimed in claim 1, wherein the Asynchronous mode facilitates deceleration of the vehicle without

¾ rel easi ng the stored energy when returni ng the brake I ever to origi nal state.

18) The spring based regenerative braking system as claimed in claim 1, wherein the Discharge mode facilitates discharging of the energy stored in the energy saver spri ng without poweri ng the rear wheel .

19) The spring based regenerative braking system as claimed in claim 1, ttl wherein the energy saving spring assists acceleration when angular speed of the wheel i s si ower than the angul ar speed of the uncoi I i ng of the spri ng.

20) The spring based regenerative braking system as claimed in claim 1, wherein the energy saving spring releases influencing the wheel when it is completely uncoiled.