Air pilot operated directional control valve

Details Air pilot operated directional control valve Air pilot operated directional control valve

1987-01-27

1989-04-18

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

13762533, 1376255, 13762566, F16K 11048

Patent

active

048217760

ABSTRACT:
An air pilot operated directional control valve for selectively connecting a normally open port to two selection ports, by an axial movement of a plunger with valve seats which are adapted to selectively close the axial open ends of the selection ports. The valve has diaphragms which define therebetween a control chamber in which the selection ports and the normally open port open. The plunger is continuously biased by a spring in one direction. The valve also has a pilot pressure chamber which is defined by one of the diaphragms, so that when the pilot pressure exceeds a predetermined value, the plunger moves in the axial direction against the spring to switch the connection between the normally open port and the selection ports.

REFERENCES:
patent: 2838068 (1958-06-01), Ray
patent: 3707162 (1972-12-01), Bachmann
patent: 3794075 (1974-02-01), Stoll et al.
patent: 4046159 (1977-09-01), Pegourie
patent: 4615353 (1986-10-01), McKee

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