Patent ID: 9452316
Filing Date: 2016-09-27
CPC Classification: A61G,A61H,A63B

Claim Text:
1. A wheel chair comprising: two front wheel frames and two front wheels connected to the two front wheel frames, each front wheel frame having a front extension extending therefrom; two rear wheel frames and two rear wheels connected to the two rear wheel frames; two side frames connected between the two front wheel frames and the two rear wheel frames, two handles connected to the two rear wheel frames; two pedals each having a connection unit on one side thereof, two cranks each having a first end and a second end, the first end of each crank connected to the connection unit corresponding thereto, the second end of each crank connected to the front extension corresponding thereto; two transmission devices respectively connected to the two side frames and each transmission device having a driving unit, a clutch unit and a rear wheel driving unit, each of the side frames connected to the front wheel frame and connected to the second end of the crank, each of the clutch units located outside of the front wheel frame and having an intermediate disk and a clutch disk which is co-rotatably connected with the intermediate disk, each of the rear wheel driving units connected between the rear wheel and the intermediate disk; two clutch devices respectively connected to the two front frames and each clutch device having a shifter which has a plate on a first end thereof, a second end of the shifter being a fixed end, a middle portion of each of the shifters being pivotably connected to the front frame corresponding thereto, and two control units respectively connected to the handles and each control unit having a box in which a slide, a passive member and a hooked member are located, a button located on a surface of the box and a push member connected to the box, the passive member connected between a first end of the slide and a spring, the passive member connected to the plate of the shifter, a second end of the slide pivotably connected to the hooked member, the box having a restriction slot and the hooked member having an end removably located in the restriction slot, the button being pushed to pivot the hooked member to be removed from the restriction slot, the push member having an end pivotably connected to the box and connected with the slide, wherein the slide, the hooked member and the passive member are operated by pivoting the push member, the passive member being moved to activate the shifter to shift the clutch disk to be engaged with the intermediate disk to connect the clutch unit and the driving unit, when the wheel chair moves, the rear wheels drive the rear wheel driving units such that a patient's legs on the pedals are pivoted about the cranks counter clockwise.