Adjustable elastomer torsion device

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

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F16F 1/14 (2006.01) F16F 1/36 (2006.01)

Patent

CA 2151629

An adjustable elastomer torsion device includes a base member aligned in partially nested relation with a resilient elastomer (e.g. rubber or urethane resin) torsion member; parts of the base member and the torsion member overlap each other and an extension portion of the torsion member projects beyond the base member. The base member and the torsion member are interlocked, where they overlap each other, to prevent relative twisting between them, but the interlock does not interfere with twisting of the torsion member extension. An adjustment mechanism provides for adjustment of the positions of the base and torsion members relative to each other to vary the length of the extension portion of the torsion member over a given displacement length and thereby adjust the elastomeric, resilient torsional restoration force (torsional resistance) of the device within a predetermined force range. In some versions, the base member is a resilient elastomer, so that some twisting occurs in the base member; in others the base member does not twist preceptibly.

Un dispositif de torsion réglable en élastomère comprend un élément support et un élément de torsion résilient, en élastomère (p. ex. résine de caoutchouc ou résine uréthane), qui sont alignés et partiellement emboîtés l'un dans l'autre; certaines parties de l'élément support et de l'élément de torsion se chevauchent et une partie de l'élément de torsion se prolonge au-delà de l'élément support. Les parties qui se chevauchent, s'emboîtent l'une dans l'autre afin d'empêcher toute torsion de l'élément support par rapport à l'élément de torsion, à ce niveau, mais cela n'empêche pas la torsion du prolongement de l'élément de torsion. Un mécanisme de réglage permet de régler la position de l'élément support par rapport à celle de l'élément de torsion afin de faire varier la longueur du prolongement de l'élément de torsion sur une longueur de déplacement donnée et de régler ainsi la résistance à la torsion des parties en élastomère du dispositif dans une plage de force donnée. Dans certaines configurations de cette invention, l'élément support est un élastomère résilient, et il subit donc une certaine torsion; dans d'autres, l'élément support ne subit aucune torsion appréciable.

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