Crank with freewheel

Details Crank with freewheel Crank with freewheel

B - Operations, Transporting

62

M

B62M 1/02 (2006.01) B62M 3/00 (2006.01)

Patent

CA 2483776

A crank has a crank arm (3) and a freewheel element (1, 2) for fastening the crank arm (3) on a crankshaft. When the crank arm (3) is rotated in a first direction, a torque is transmitted to the crankshaft. When the crank arm (3) is rotated in a second, opposite direction, the crank arm (3) rotates in freewheeling mode. The crank furthermore has at least one fixing means (6, 6') for cancelling freewheeling, allowing the torque of the crank arm (3) to be transmitted to the crankshaft in both directions of rotation. This crank allows simple switching between one-way coupling and two-way coupling and significantly increases the available training and therapy options.

L'invention concerne une manivelle dotée d'un bras (3) et d'un élément roue libre (1, 2) pour fixer le bras (3) de la manivelle sur un vilebrequin. Lorsque le bras (3) de la manivelle tourne dans une première direction, un couple est transmis au vilebrequin. Lorsque le bras (3) de la manivelle tourne dans une seconde direction, opposée à la première, il (3) tourne en mode roue libre. Cette manivelle comporte en outre au moins un élément de fixation (6, 6') pour supprimer le mode roue libre et permettre la transmission du couple du bras (3) de manivelle au vilebrequin dans les deux sens de rotation. Ladite manivelle permet d'effectuer aisément une commutation entre le couple unidirectionnel et le couplage bidirectionnel, augmentant ainsi de manière significative les options disponibles pour l'entraînement et la thérapie.

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