Oil-operated tensioner with oil-sealed air entrance

Details Oil-operated tensioner with oil-sealed air entrance Oil-operated tensioner with oil-sealed air entrance

1992-12-11

1994-05-10

Britts, Ramon S.

Endless belt power transmission systems or components

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

Tension adjuster or shifter driven by electrical or fluid motor

474138, F16H 708

Patent

active

053103858

ABSTRACT:
In an oil-operated tensioner having a cylindrical housing and a plunger defining a high-pressure oil chamber, air is prevented from entering the high-pressure chamber, as the plunger moves in the outward direction, by oil in an annular chamber formed in the interior wall of the housing and surrounding the plunger. The annular recess can be formed at the end of the housing, if the housing is disposed so that the plunger projects outwardly in the upward direction. Otherwise, the annular chamber is disposed inwardly from the end of the housing.

REFERENCES:
patent: 4911680 (1990-03-01), Kodama et al.
patent: 4997410 (1991-03-01), Polster et al.
patent: 4997411 (1991-03-01), Breon et al.
patent: 5167402 (1992-12-01), Nakakubo et al.
patent: 5181889 (1993-01-01), Maruyama et al.
patent: 5234383 (1993-08-01), Harada et al.
patent: 5248282 (1993-09-01), Suzuki
U.S. patent application Ser. No. 07,964,349 filed Oct. 21, 1992 entitled "Oil-Operated Tensioner".

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