Fluid handling – Systems – Multi-way valve unit
Patent
1979-09-24
1981-08-04
Cohan, Alan
Fluid handling
Systems
Multi-way valve unit
13762546, F16K 1106
Patent
active
042816840
ABSTRACT:
A balanced rotary-faced valve for the control of the flow of pressurized hydraulic fluid to hydraulic apparatus having extend and retract ports is described. The valve has a sculptured body portion defining a flat land portion that contains a series of recesses, each one of the recesses in fluid communication with corresponding pressure, drain extend and retract ports. A rotary disk in sliding contact with the flat land portion has recesses capable of registration with corresponding recesses in the flat land portion. The disk is rotatable thereby controlling the flow of pressurized fluid within the valve. The rotary disk has passageways that guide the pressurized fluid to both sides of the disk so as to cause a slight force imbalance in a direction to urge the rotary disk towards the flat land portion. The rotary disk is controlled by a return to neutral spring-loaded control shaft.
In the neutral position, the recesses of the rotary disk overlay the recesses in the sculptured body portion such that the inletted pressurized fluid is circulated through the disk and out to drain. In the extend or retract position, the recesses in the rotary disk overlay the recesses in the sculptured body portion so that a fluid balance exists between the fluid entering and leaving the extend port and the fluid leaving and entering the retract port.
REFERENCES:
patent: 2229931 (1941-01-01), Parker
patent: 2990853 (1961-07-01), Sharp
patent: 3696710 (1972-10-01), Ortelli
patent: 3768516 (1973-10-01), Cyphelly
patent: 3892259 (1975-07-01), McClocklin
Cohan Alan
Dubro, Inc.
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