Hydraulic autotensioner

Details Hydraulic autotensioner Hydraulic autotensioner

1990-02-27

1991-01-22

Bui, Thuy M.

Endless belt power transmission systems or components

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

474110, F16H 708

Patent

active

049867962

ABSTRACT:
An autotensioner for controlling the tension of a belt. It is filled with a hydraulic oil containing poly-.alpha.-olefin as a basic ingredient. Since such an oil has excellent viscosity-temperature properties as well as good lubricating properties, a body and a piston slidably mounted in the body are abraded less at their sliding surface than with a prior art autotensioner and thus the size of an oil leakage gap formed therebetween is less subject to change. This will prevent cavitation in a pressure chamber formed in the body.

REFERENCES:
patent: 4909777 (1990-03-01), Inoue et al.
patent: 4911679 (1990-03-01), Inoue et al.
patent: 4936868 (1990-06-01), Johnson
patent: 4946473 (1990-08-01), Johnson
patent: 4950209 (1990-08-01), Kawashima et al.

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