Hydraulic tensioner with plastic cap check valve or vent

Details Hydraulic tensioner with plastic cap check valve or vent Hydraulic tensioner with plastic cap check valve or vent

1999-05-27

2000-10-31

Bucci, David A.

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

474109, 474111, F16H 708

Patent

active

061394548

ABSTRACT:
A hydraulic tensioner includes a plastic cap vent or check valve at the top of the piston. Oil and air that pass through the top end of the piston accumulate in the space between the plastic cap and the piston. The plastic cap moves small distances in the axial direction to permit the escape of air and oil through the plastic cap to atmosphere. A low rate spring may be used to cause the plastic cap to move away from the piston.

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patent: 5718650 (1998-02-01), Smith et al.
patent: 5842943 (1998-12-01), Tada
patent: 5879256 (1999-03-01), Tada
patent: 5935031 (1999-08-01), Tada

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