| 摘要 |
FIELD: transport engineering; bicycles with front-upper arrangement of drive and reciprocating-angular displacement of cranks. SUBSTANCE: bicycle has frame with rigid units, front and rear forward curved handlebars connected by control cords in crosswise manner, with drive of coaxial semi-shaft with pin-and-slot connection and cable-and-sheave system to cranks. Drive and saddle on upper tube are installed for controlled displacement. Rear handlebar post has back. Driving sprocket is provided with projections on circle surface of disk with number of teeth Z=70. Driving sprocket rotates freely on supports of semi-shafts and has ratchet members on inner surface for engagement with similar members of semi-shaft supports. EFFECT: improved performance characteristics owing to redistribution of loads to different groups of muscles in riding. 3 cl, 10 dwgo
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