Speed changer with pre-determined gears, particularly for...

B - Operations – Transporting – 62 – M

Patent

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Details

B62M 25/04 (2006.01)

Patent

CA 2512877

The invention relates to a speed changer (1) which is used to control derailleurs (5, 6) by means of cables (3, 4) from a single rotating handle (2), said deraileurs (5, 6) being connected respectively to an elastic return means. The inventive speed changer (1) comprises at least two cable-manoeuvring mechanisms (7, 8). According to the invention, the mechanism (8) for manoeuvring the cable (4) of the rear derailleur (6), which rotates integrally with the handle (2), can cause the rear cable (4) to loosen or tighten when the handle (2) is rotated in one direction. The speed changer is characterised in that the rotating assembly, formed by at least one mechanism (8) for manoeuvring the rear cable (4) and the handle (2), can be connected to rotate intermittently with the mechanism (7) for manoeuvring the front cable (3) of the front derailleur (5) which, depending on the direction in which the handle (2) is rotated, can cause the front cable (3) of the front derailleur (5) to tighten or loosen.

L~invention concerne un sélecteur (1) de vitesses pour la commande par câbles (3,4), à partir d~une poignée (2) tournante unique, de dérailleurs (5,6) respectivement associés à un moyen de rappel élastique, ce sélecteur (1) comportant au moins deux mécanismes (7, 8) de man.oelig.uvre de câble le mécanisme (8) de man.oelig.uvre du câble (4) du dérailleur (6) arrière, solidaire en rotation de la poignée (2), étant apte à provoquer, lors d~une rotation de la poignée (2) dans un même sens, un lâcher ou un tirage du câble (4) arrière. Ce sélecteur est caractérisé en ce que l~ensemble rotatif formé au moins du mécanisme (8) de man.oelig.uvre du câble (4) arrière et de la poignée (2) est couplable en rotation de manière intermittente avec le mécanisme (7) de man.oelig.uvre du câble (3) avant du dérailleur (5) de plateaux apte à provoquer, en fonction du sens de rotation de la poignée (2), un tirage ou un lâcher du câble (3) avant du dérailleur (5) de plateaux.

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