Patent ID: 7559264

Claim:
A tractive linear reciprocating driving apparatus comprising: a frame of the driving apparatus composed of a guide column, an auxiliary frame pillar and frame end plates, two opposite ends of the frame equipped with a flywheel and a slave sprocket, respectively, with a single endless chain operatively connected therebetween to form a chain ring, the guide column and the auxiliary frame pillar positioned on a plane that is parallel to the endless chain ring plane; and a sliding assembly used for driving and a slave chain-engaging and reversing mechanism thereof mounted on the guide column, the sliding assembly having upper and lower slide bars mounted on the guide column for sliding along the guide column, at least one pedal and at least one hand-controlled rod used for propulsion mounted on an outside butt plate of the sliding assembly; wherein: a chain engagement means of said slave chain-engaging and reversing mechanism is positioned in the endless chain ring plane, said chain engagement means being connected with upper and lower slave slide bars that are mounted on the guide column, a chain engaging tooth plate being provided in the chain engagement means and one end of the chain engaging tooth plane being operably connected with the sliding assembly via connecting pieces including a pull-up rod, a pull-down rod and a nose of a connecting rod; two chain-engaging teeth positioned on the chain engaging tooth plate; said two chain-engaging teeth tilted towards two opposite directions and alternatively engaging the endless chain, in cooperation with a chain-retaining board having a chain-retaining arc projection; a reversing compensation means used with the slave chain-engaging and reversing mechanism has a resilient member that can contact a front surface of a chain tooth on the flywheel or the slave sprocket directly in inverse direction, and a space or clearance is reserved for movement.