Load responsive control valve
OwnerTadeusz Budzichinventor
Life of this patent
Estimating the term…
Abstract
A load responsive flow control valve for use in a system controlling a plurality of loads. The system is powered by a single fixed displacement pump equipped with a load responsive bypass valve or a variable displacement pump equipped with load responsive control, which during simultaneous control of multiple loads automatically maintains the pump discharge pressure at a level higher by a constant pressure differential than the pressure required by largest load being controlled. The load responsive valve is of a four position regeneration type which in the regeneration position while connecting together both of the load chambers supplies irrespective of the pressure level an adjustable controlled flow into those chambers from the inlet chamber through a metering orifice.
Claims6
A load responsive valve assembly comprising at least one valve housing having an inlet chamber, first and second load chambers, at least one exhaust chamber, and load sensing port means operable through signal conducting passage means to transmit a control load pressure signal to output flow control means of a pump, direction control means for selectively interconnecting and isolating said chambers and said load sensing port means in a number of control positions including a neutral position and a regeneration position, in said regeneration position said direction control means having means for interconnecting said first and second load chambers, means for interconnecting said first and second load chambers with said load sensing port means, means for interconnecting said first and second load chambers with said inlet chamber through variable metering orifice means and means operable to vary flow area of said variable metering orifice means.
Dependencies are inferred from the claim text.