Patent ID: 6817958
Filing Date: 2004-11-16
Classification: F16H,Y10T

Abstract:
A tensioner for applying tension to a timing belt or timing chain in an engine, the tensioner comprising a tensioner housing having front and rear ends, a plunger extending outward from the interior of the housing at the front end thereof, and having a forward end outside the housing, the plunger being slidable into and out of the housing along an axis from a withdrawn position to an projected position, and being spring-urged in a projecting direction along said axis, a lock pin on the plunger adjacent the forward end of the plunger and extending laterally with respect to said axis, a fulcrum pin on a side wall of the tensioner, and a projection-preventing hook pivoted on said fulcrum pin, the fulcrum pin being positioned so that the hook can engage the lock pin when the plunger is in said withdrawn position, wherein the improvement comprises a resisting member, fitted onto the fulcrum pin, and exerting a frictional force on the hook to produce resistance to pivoting movement of the hook, whereby pivoting movement of the hook, and noise due to vibration of the hook, during operation of the engine are suppressed, in which the resisting member is a plate-shaped spring.