Mechanically driven ratchet assembly

F - Mech Eng,Light,Heat,Weapons – 16 – D

Patent

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Details

F16D 41/12 (2006.01) B65H 75/44 (2006.01) F16H 31/00 (2006.01)

Patent

CA 2309094

A mechanically driven ratchet assembly which has a pawl gear (18) attached to a rotationally biased shaft (90), a pawl assembly (12) having a pawl tooth (14) for engagement with a pawl gear (18) and a ratchet gear (40) which alternately permits movement when driven by the pawl (18) of the pawl assembly (12) from a first position to a third position in which full rotation of the shaft, in the direction of the rotational bias, was permitted, and sequentially and alternatively permits rotation of the pawl assembly (12) either from the first position to a second position where the pawl tooth (14) remains engaged with the teeth (20) of the pawl gear (18) or to a third position where the pawl tooth (14) is no longer engaged with the pawl gear.

Cette invention concerne un ensemble cliquet à entraînement mécanique qui comporte une roue dentée (18) reliée à un arbre (90) sous contrainte de rotation, un ensemble cliquet (12) présentant une dent (14) venant en prise avec la roue dentée (18), et une roue à rochet (40) qui alternativement permet au cliquet (12), lorsqu'elle est entraînée par la roue dentée (18), de passer d'une première position à une troisième position dans laquelle l'arbre est libre de tourner dans le sens de la contrainte de rotation, et permet séquentiellement et alternativement à l'ensemble cliquet (12) de passer d'une première position à une deuxième position dans laquelle la dent (14) de cliquet restant engrenée avec les dents (20) de la roue dentée (18), ou bien à une troisième position lorsque la dent (14) est désengrené de la roue dentée.

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