Pilot transfer valve

Details Pilot transfer valve Pilot transfer valve

1997-11-25

1999-02-09

Michalsky, Gerald A.

Fluid handling

Convertible

Reversible check

13762564, 251 26, F15B 13043

Patent

active

058681574

ABSTRACT:
A transfer valve according to this invention has an internal pilot channel in communication with a supply port; an external pilot channel in communication with an external pilot port; a shuttle valve that selectively guides pilot fluid from the internal and external pilot channels to a pilot valve. The shuttle valve has two inlets, one outlet and a shuttle valve member that always connects the inlet on the high pressure side to the outlet while closing the inlet on the low pressure side, wherein the two inlets are individually connected to the internal and external pilot channels while the outlet is connected to the pilot valve.

REFERENCES:
patent: 4706930 (1987-11-01), Lexen
patent: 4966196 (1990-10-01), Meyer

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