Pressure control valve

Details Pressure control valve Pressure control valve

1993-03-30

1994-08-16

Michalsky, Gerald A.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

91451, 13759613, F15B 1308, F16K 1702

Patent

active

053377788

ABSTRACT:
A pressure control valve of the type having pump, tank and load-sensing connections used in conjunction with one or more proportional type valves. In this type of system a load-sensing signal is tapped off from the output side of the proportional valves and conveyed to the load-sensing connection of the pressure control valve. A pressure control valve of the type herein has load-sensing and pressure chambers at opposite ends thereof with a slide valve therebetween which is spring biased towards the pressure chamber and controls the internal flow from the pump connection to the tank connection. The slide valve has an auxiliary change-over type valve which selectively connects the pressure chamber to the pump and load-sensing connections in response to a pressure differential between the pump and load-sensing connections to achieve a pressure balance between the load-sensing chamber and the pressure chamber.

REFERENCES:
patent: 5129229 (1992-07-01), Nakamura et al.

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