Integral inlet and pressure relief valve for an automotive tensi

Details Integral inlet and pressure relief valve for an automotive tensi Integral inlet and pressure relief valve for an automotive tensi

1995-08-18

1997-12-23

Schoeppel, Roger J.

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

474111, F16H 708

Patent

active

057002134

ABSTRACT:
A hydraulic tensioner is provided with a plunger slidably fitted in a cavity in the tensioner housing and biased in a protruding direction by a spring and fluid. An integral inlet check and pressure relief valve is positioned in the cavity and permits fluid to only flow into the cavity and thereby protrude the plunger but not out of the cavity until a high pressure condition is reached whereupon fluid is relieved out of the cavity back to the fluid source. The integral inlet check and pressure relief valve includes a check spring biasing a valve member a against a pressure relief disk that is biased against the valve member by a pressure relief spring.

REFERENCES:
patent: 4507103 (1985-03-01), Mittermeier
patent: 4708696 (1987-11-01), Kimura et al.
patent: 4713043 (1987-12-01), Biedermann
patent: 4874352 (1989-10-01), Suzuki
patent: 4881927 (1989-11-01), Suzuki
patent: 5176581 (1993-01-01), Kumm
patent: 5259820 (1993-11-01), Mott
patent: 5277664 (1994-01-01), Mott
patent: 5346436 (1994-09-01), Hunter et al.
patent: 5577970 (1996-11-01), Smith et al.
patent: 5628701 (1997-05-01), Dembosky et al.

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