Fluid operated chain or belt tensioning device

Details Fluid operated chain or belt tensioning device Fluid operated chain or belt tensioning device

1988-07-01

1989-05-02

Bui, Thuy M.

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

474136, 474138, F16H 712

Patent

active

048264709

ABSTRACT:
A hydraulically operated chain or belt tensioner is provided which in a preferred embodiment (500) features a piston or dynamic plunger (56) slidably received within a bore (54) of a housing (52) that includes a fluid chamber (65) that is vented by at least one air vent (76) extending through housing (52) that is oriented relative bore (54) such that tensioner (500) can be rotated a predetermined angular amount alpha relative horizontal with vent (76) maintaining a slope (B) greater than zero enabling entrapped air to escape from chamber (64) and preventing a substantial amount of fluid to drain therefrom by gravity when unpressurized.

REFERENCES:
patent: 3960026 (1976-06-01), Hibino
patent: 4504251 (1985-03-01), Mittermeier

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