Fluid handling – Systems – Multi-way valve unit
Patent
1984-03-02
1987-02-17
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
137269, 13762568, F15B 13042
Patent
active
046432280
ABSTRACT:
A convertible high or low pressure pilot valve adapted to selectively control fluid flow between a common port and a supply port or exhaust port by moving a band of orifices in a plunger that is slidably disposed within the valve past an O-ring seal disposed between the supply port and the exhaust port so as to establish fluid communication between the common port and the supply port whenever the band is aligned with the supply port through a unitary axial bore in the plunger that maintains fluid communication with the common port or between the common port and the exhaust port through the same axial bore, whenever the band is aligned with the exhaust port or to block fluid communication between the common port, the supply port, and the exhaust port whenever the band is disposed between the supply port and the exhaust port in such manner that the O-ring bridges the orifices in such band.
REFERENCES:
patent: 323404 (1885-08-01), Durfee
patent: 1431101 (1922-10-01), Dineen
patent: 2910050 (1959-10-01), Dotter et al.
patent: 3429341 (1969-02-01), Sochting
patent: 3621881 (1971-11-01), Vicari
patent: 4209040 (1980-06-01), Peters
patent: 4252145 (1981-02-01), Peters
Michalsky Gerald A.
Sigma Enterprises, Inc.
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