Chain tensioner with a spring and hydraulic fluid acting on both

Details Chain tensioner with a spring and hydraulic fluid acting on both Chain tensioner with a spring and hydraulic fluid acting on both

1997-10-15

1999-11-30

Graysay, Tamara L.

Endless belt power transmission systems or components

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

Load responsive tension adjuster or shifter

474111, F16H 708

Patent

active

059933399

ABSTRACT:
A chain tensioner for tensioning a chain in a drive of an internal combustion engine comprises a piston displaceable within a chamber. The piston is biased by a compression spring so that it protrudes from the housing towards the chain to provide the tension. The chamber has an inlet connected to a supply of oil from the engine. The oil acts on each side of the piston with substantially the same pressure such that the piston is damped in both directions when moving in the chamber. The surface areas of the piston on which the oil acts may be substantially equal so that no tensioning force is supplied by the oil.

REFERENCES:
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patent: 4525153 (1985-06-01), Wilson
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patent: 5088457 (1992-02-01), Ferrazzi
patent: 5109813 (1992-05-01), Trzmiel et al.
patent: 5117786 (1992-06-01), Trzmiel et al.
patent: 5720684 (1998-02-01), Mott
DE 3832512--Tensioning Device for an Endless Flexible Transmission, 1-sheet abstract in English Language.

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