BICYCLE SPINDLE Russian patent published in 2015 - IPC B62M1/36 F16H1/28 F16H21/14 

FIELD: transport.

SUBSTANCE: claimed spindle comprises pedal mechanism. Drive sprocket hub seats free on the central shaft and is made integral with the crank, axis of the latter is shifted relative to central axis and aligned with the centre of triangular rotor. All vertices of said rotor stay in constant contact with epitrochoid outline delineated by said vertices in outer casing outer side surface of the latter being provided with pedal con rod also locked on the shaft end. Radii of said hub and crank relate as 2:3 while eccentricity makes half the radius of cup.

EFFECT: threefold increase in drive sprocket torque, decreased physical efforts.

1 dwg