Low friction proportional unloading valve

Details Low friction proportional unloading valve Low friction proportional unloading valve

1990-05-07

1992-02-25

Hepperle, Stephen M.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

251282, F16K 31365

Patent

active

050904370

ABSTRACT:
A low friction proportional unloading valve mechanism for pressurized fluid circuits incorporating a valve housing forming primary and bypass fluid circuits. A normally closed unloading valve normally prevents the flow of incoming fluid to the bypass fluid circuit and is opened by a pressure responsive valve actuator. The valve actuator forms a pressure responsive wall and may take the form of spaced diaphragms or a deformable flexible hose that induces opening force to the unloading valve in direct proportion to the pressure in the primary fluid circuit. Upon opening of the unloading valve, a check valve in the primary fluid circuit prevents back flow and thus maintains valve controlling pressure on the movable wall structure of the valve actuator.

REFERENCES:
patent: 1402016 (1922-01-01), Raymond
patent: 1636561 (1927-07-01), Hazard
patent: 1779640 (1930-10-01), Rayfield
patent: 3143134 (1964-08-01), Karpis

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