BICYCLE Russian patent published in 2003 - IPC

FIELD: transport engineering. SUBSTANCE: invention relates to drive of bicycle propulsive devices which not come in contact with road. Proposed aerodynamic propulsive devices 8, such as centrifugal fans, are arranged at both sides of frame, and they force out air in plane of rotation of working wheels. There is no transmission of rotation from pedal drive 2, 11 directly to rear wheel 5. Rotation of working wheels of both propulsive 8 is provided by common shaft 9 on which gear 10 is rigidly mounted. Driven sprocket 7 and gear wheel 6 connected with gear 10 are rigidly secured on axle 4. rear wheel 5 can rotate only on axle 4 installed for rotation in frame rear fork. Wheels can be replaced by skies or skates. EFFECT: increased speed of riding. 5 dwg