Dual setpoint pressure controlled hydraulic valve

Details Dual setpoint pressure controlled hydraulic valve Dual setpoint pressure controlled hydraulic valve

2008-08-26

2011-11-15

Rivell, John (Department: 3753)

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

C137S102000

Reexamination Certificate

active

08056576

ABSTRACT:
A hydraulic valve has a valve body with a bore into which an inlet port, an outlet port, and a workport all open. A valve spool is slideably received within the bore. The valve spool has a first position that provides a path between the inlet port and the workport, and a second position that provides another path between the outlet port and the workport. Inlet port pressure tends to move the valve spool into the first position and outlet port pressure tends to move the valve spool into the second position. A linear actuator is coupled to the valve spool by a spring, thereby biasing the valve spool toward the first position. Another spring biases the valve spool toward the second position.

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