Tricycle powered by body movements - has sliding seat reciprocated along frame by flexing arms and legs to drive spring tensioned chains

摘要

The tricyle is powered by movements of the arms and legs continuously to drive the rear wheels through spring tensioned chains. The chassis (5) has a sliding seat (6) and footrests (3) and handgrips (21) pulling a chain (19) attached (17) to the seat. This seat moves forward by the action of a spring (8) and chain (7), driving a chain wheel (9) and gear (11). This latter drives a gear (13) on the rear wheels (1). At the end of the slide, and seat is returned by flexing the legs, driving a spring tensioned chain (15, 16) and another gear (14) on the rear wheels.