Method for reducing seal stiction in a fluid cylinder

Details Method for reducing seal stiction in a fluid cylinder Method for reducing seal stiction in a fluid cylinder

1992-12-23

1995-11-21

Look, Edward K.

Power plants

Pressure fluid source and motor

Ram driven by fluid pumped from reservoir

277 24, 277 59, 277 63, F16D 3102

Patent

active

054675995

ABSTRACT:
An apparatus and a method for reducing seal stiction is provided. In the method, a first step provides a fluid cylinder comprising a piston displacably mounted in a housing containing pressurized fluid is provided in the first step. The housing has first and second seals in register with the piston. In a second step, the second seal is applied to maintain pressure within the housing when the piston is in a static state. In a third step, the first seal is applied to maintain pressure within the housing and the second seal relaxed prior to displacement of the piston. In a fourth step, the second seal is applied to maintain pressure within the housing and the first seal relaxed subsequent to the displacement of the piston. An apparatus is provided for applying one of the first or second seals and relaxing the other of the first or second seals, before and after displacement of the piston.

REFERENCES:
patent: 3216651 (1965-11-01), King et al.
patent: 3514114 (1970-05-01), Monahan
patent: 3912284 (1975-10-01), Gosling et al.
patent: 3943717 (1976-03-01), Schexnayder
patent: 4055107 (1977-10-01), Bartley
patent: 4189157 (1980-02-01), Mahan et al.
patent: 4222575 (1980-09-01), Sekiguchi et al.

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