BICYCLE Russian patent published in 1996 - IPC

FIELD: children, group (multidrive) and portable bicycles. SUBSTANCE: bicycle has frame, running wheels and mechanism to transmit torque to driving wheel; propeller unit has turnable bow-shaped spring-loaded segment with length of roller-bushed chain placed in holder. Segment executes vibratory movement is rollers to set into rotation a sprocket engaging with chain, by means of pawls uniformly spaced over circumference. During working stroke, return springs extend through fixed distance. Each spring is placed between hooks connected with sprocket rim and rim plate. Turnable pawls get into meshing with propeller hub teeth, thus setting hub into rotation. With working stroke completed, segment returns in initial (starting) position. Return springs contact, and hub teeth get released from pawl stops. Hub with propeller wheel continues running, and sprocket is reset for new starting. EFFECT: enlarged operating capabilities. 3 dwg