Tensioner

Patent No. 7,455,607

Issued: November 25, 2008
Filed: May 23, 2006
Priority Application: Jun 13, 2005 - JP2005-172565

Inventors: Narita; Kinzo (Nabari, JP), Wake; Junichi (Nabari, JP), Barrette; Simon (Aichi-ken, JP)
Assignee: BorgWarner Morse TEC Japan K.K. (Nabari-Shi, JP)


A tensioner that includes a piston supported slidably in a piston bore formed in a housing, a piston spring biasing the piston in the protruding direction, and a circlip member having an expandable ring-shaped body that is engageable with the rack teeth of the piston. In the piston bore, the ring-shaped body of the circlip member is adapted to engage with an upper and lower stop surface. The rack teeth of the piston are formed in such a shape that when the ring-shaped body of the circlip member engages with the upper stop surface of the piston bore, the piston is permitted to move in the protruding direction and, when the ring-shaped body of the circlip member engages with the lower stop surface of the piston bore, the piston restricts movement in the retracting direction.


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