Cartridge type pilot valve

Details Cartridge type pilot valve Cartridge type pilot valve

1982-03-01

1983-10-04

Weakley, Harold W.

Fluid handling

Removable valve head and seat unit

137315, 13762565, F16K 2500

Patent

active

044073232

ABSTRACT:
A three-way normally closed only, pilot air valve for supplying pressurized pilot air to a directional flow control air valve, such as a four-way valve, a three-way valve, a two-way valve or the like, for shifting the main valve spool of such valves. The valve includes a valve body having a pilot air inlet port, a cylinder port, and an exhaust port. A tubular valve retainer member having an axial bore formed therethrough is releasably mounted in the valve body. A first passageway connects the pressurized pilot air inlet port to the cylinder port. A second passageway connects the cylinder port with the exhaust port.
A captive poppet valve spool is movably mounted in the valve retainer member for controlling the flow of air through the two passageways.

REFERENCES:
patent: 2656983 (1953-10-01), Grayson
patent: 3640304 (1972-02-01), Fox
patent: 3704727 (1972-12-01), Adahan
patent: 4051862 (1977-10-01), Haytayan
patent: 4074700 (1978-02-01), Engle
patent: 4139020 (1979-02-01), Sebo

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