WATER BIKE Russian patent published in 2014 - IPC B63H1/36 B63B35/73 B63H16/10 

FIELD: transport.

SUBSTANCE: water bike includes floats fasten together by cross-members, seat and pedal propulsor. The pedal propulsor is equipped with driving sprocket, swinging arm, set of enveloping sprockets, steering tiller, console axle, bushing with driven sprocket, freewheel clutch, screw-propeller and round-link welded calibrated chain. The steering tiller is made capable to rotate on axle which is mounted on rear cross-member. The swinging arm is connected with steering tiller via axle and capable to be reclined. On console section of axle bushing is installed which is rigidly connected with drive sprocket. The bushing is made capable of axial rotation and interaction with screw-propeller via freewheel clutch. Driving sprocket is installed on pedal propulsor and interacts with round-link welded calibrated chain. Branches of round-link welded calibrated chain are hitched over set of enveloping sprockets and close on driven sprocket which is immovable relative to bushing. Enveloping sprockets make mutually perpendicular pairs whereas two pairs of enveloping sprockets are located in the plane perpendicular to driving sprocket plane.

EFFECT: improved maneuvering characteristics.

2 dwg