VEHICLE MUSCULAR DRIVE Russian patent published in 1997 - IPC

FIELD: mechanical engineering; bicycles. SUBSTANCE: to create muscular drive providing complete utilization of traction force owing to optimum arrangement of drive on frame and make of its members providing movement of pedals, drive is furnished with second drive gear. Gears are made in form of crescent shaped segments secured in definite manner directly on cranks which are arranged on frame at preset distance from bottom bracket. Drive chains are secured in definite points of segments. Drive has crank returns mechanism. Gear ratio changer in proposed mechanism in made in form of turnable rocker carrying freewheeling mechanism and crank return mechanism and coupling all drive members into common system by traction chains. EFFECT: enlarged operating capabilities. 6 cl, 5 dwg