FIELD: machine building.
SUBSTANCE: invention refers to bicycles with support on back and with crank drive of simultaneous manual and foot action. Shaft of drive sprocket (33) has cranks (29, 30) with connecting rods (47, 48) which are spaced at a distance exceeding width of a seat. Pedals (49, 50) are arranged on internal surface of a middle part of connecting rods(47, 48) in one of orifices (65) facilitating change of pedal trajectory. Handles (66, 67) are set on ends of connecting rods (47, 48) in one of the orifices ensuring arrangement of handles depending on length of arms. Also rollers (43, 44) enveloping guide (42) are mounted on ends of connecting rods (47, 48).
EFFECT: convenient trajectory of pedals and facilitation of additional usage of manual drive.
4 cl, 15 dwg
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