Fluid handling – Systems – Multi-way valve unit
Patent
1988-12-12
1989-11-14
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
13762527, 1376255, F15B 13044
Patent
active
048800333
ABSTRACT:
A three-way normally closed, pilot air valve for supplying pressurized pilot air to a directional flow control air valve. The valve includes a valve body structure having a pilot air inlet port, a cylinder port, an exhaust port, an axial bore therethrough. 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 balanced captive poppet valve spool is movably mounted in the valve body structure axial bore for controlling the flow of air through the two passageways, and it has an upper and a lower, conical annular, valve member element, which alternately seat on a circular sharp edged valve seat and an angled valve seat, respectively.
REFERENCES:
patent: 3202182 (1965-08-01), Haviland
patent: 3510103 (1970-05-01), Carsello
patent: 3538954 (1970-10-01), Fagerlie et al.
patent: 3884266 (1975-05-01), Kondo
patent: 4100519 (1978-07-01), Neff
patent: 4271868 (1981-06-01), Neff
patent: 4298027 (1981-11-01), Neff
patent: 4407323 (1983-10-01), Neff
patent: 4453697 (1984-06-01), Neff
patent: 4574844 (1986-03-01), Neff et al.
Mac Valves Inc.
Mentag Robert G.
Michalsky Gerald A.
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