Tensioner

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

Patent

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Details

F16H 7/12 (2006.01)

Patent

CA 2647298

A tensioner comprising a base, a pivot arm pivotally connected to the base, a pulley journalled to the pivot arm, a first biasing member disposed between the base and the pivot arm, the first biasing member imparting a spring force to the pivot arm over a first operating range, a second biasing member disposed between the base and the pivot arm, and the second biasing member imparting a spring force to the pivot arm at a predetermined pivot arm position, the predetermined pivot arm position disposed within the operating range and beyond which predetermined pivot arm position the second biasing member supplements a spring force of the first biasing member.

L'invention concerne un tendeur comportant une base, un bras de pivot connecté de manière pivotante sur la base, une poulie tourillonnée sur le bras de pivot, un premier organe de mise en biais disposé entre la base et le bras de pivot, le premier organe de mise en biais exerçant une force élastique sur le bras de pivot sur une première plage de fonctionnement, un deuxième organe de mise en biais disposé entre la base et le bras de pivot, et le deuxième organe de mise en biais exerçant une force élastique sur le bras de pivot sur une position de bras de pivot prédéterminée, la position de bras de pivot prédéterminée étant disposée dans la plage de fonctionnement et la position de bras de pivot prédéterminée au-delà de laquelle le deuxième organe de mise en biais complète une force élastique du premier organe de mise en biais.

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