Tensioner

Details Tensioner Tensioner

2006-05-23

2008-11-25

Nguyen, Thu (Department: 4155)

Endless belt power transmission systems or components

Means for adjusting belt tension or for shifting belt,...

Load responsive tension adjuster or shifter

C474S110000, C474S101000

Reexamination Certificate

active

07455607

ABSTRACT:
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.

REFERENCES:
patent: 2069402 (1937-02-01), Cowlin
patent: 2469959 (1949-05-01), Frazier
patent: 4099298 (1978-07-01), Gimenez
patent: 4411638 (1983-10-01), Wilson
patent: 5720683 (1998-02-01), Patton
patent: 5967921 (1999-10-01), Simpson et al.
patent: 2004-353758 (2004-12-01), None

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