Priority flow control valve for hydraulic power circuits

Details Priority flow control valve for hydraulic power circuits Priority flow control valve for hydraulic power circuits

1988-06-13

1990-04-17

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Self-proportioning flow systems

137117, G05D 701

Patent

active

049171380

ABSTRACT:
A priority flow control valve for power circuits in hydraulic equipment, which is conventional in basic design, but makes use of an additional piston to impinge on the movable seat of a bias spring housed in a cylindrical chamber that connects with the constant flow passage to the priority outlet; the additional piston operates internally of a chamber having cross-sectional area greater than that of the chamber housing the spring, and is exposed to high pressure flow that can be routed into the chamber either from the priority outlet, or from the valve's main inlet, which will be connected to the high pressure line from the pump.

REFERENCES:
patent: 4303091 (1981-12-01), Hertell
patent: 4372335 (1983-02-01), Sato

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