Fluid control valve

Details Fluid control valve Fluid control valve

1989-07-10

1990-03-20

Michalsky, Gerald A.

Fluid handling

Systems

With flow control means for branched passages

91446, 91452, 91459, 13759612, 137885, 251 634, F15B 14043

Patent

active

049092790

ABSTRACT:
In a fluid control valve, a check valve is provided between the pump port and the first fluid chamber and allows the fluid to pass therethrough only in a direction from the pump port to the first fluid chamber, a down control valve is provided between the first fluid chamber and the second fluid chamber, an up control valve is provided between the first fluid chamber and the third fluid chamber, the fluid is allowed to flow from the pump port to the cylinder port through the check valve and through the down control valve when they are opened, and the fluid from the cylinder port to the tank port is allowed to flow through the down control valve, through the first fluid chamber and through the up control valve when they are opened. The fluid control valve can be obtained simple in structure and high in precision, and be allowed a reduction in cavitation and noise.

REFERENCES:
patent: 500645 (1893-07-01), West
patent: 3477466 (1969-11-01), Sturm
patent: 3874407 (1975-04-01), Griswold
patent: 4148248 (1979-04-01), Risk
patent: 4153074 (1979-05-01), Risk
patent: 4457211 (1984-07-01), Risk
"Hydraulic Pressure and Penumatic Pressure", from Institute of Hydraulic and Pneumatic Engineering, May 1986, vol. 17, No. 3, pp. 181-186.

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