Lever arm propulsion for use with bicycle, has roller that is pressed against running rail welded to bicycle frame, and bearing pushed downward due to force provided by lever arm to drive rear wheel and overstring of rear wheel

摘要

The propulsion has a roller (8) pushed against a wedge-shaped running rail (10) that is welded at a bicycle frame if a pedal (11) with a foot moves in downward direction to transfer load to a stock (16) and the roller. Another roller (17) is pressed against another wedge-shaped running rail (21) that is welded to the bicycle frame, so that circling movement is exerted by the pedal in horizontal direction. A bearing (3) is pushed downward due to force provided by the lever arm to drive a rear wheel (12) and an overstring (13) of the rear wheel.