Fluid handling – Systems – Multi-way valve unit
Patent
1977-03-30
1979-01-09
Weakley, Harold W.
Fluid handling
Systems
Multi-way valve unit
13762568, 251368, 251129, F16K 3102
Patent
active
041333489
ABSTRACT:
A valve comprising a valve body having a bore, a hollow plunger reciprocable within said bore and having radial ports to control flow of fluid under pressure between various valve body openings. Seals are disposed about the exterior surface of the plunger to seal against fluid flow longitudinally of the bore. The seals are of a type that offer low resistance to movement of the plunger from a static condition, and the exterior surface of the plunger has an extremely smooth finish and is of a comparatively small outside diameter to further reduce resistance to plunger movement. The valve construction is such that whenever a plunger port passes underneath a seal, fluid pressure is always from the inside of the plunger to the outside so that there is a tendency to temporarily lift the seal from the exterior surface of the plunger or at least to prevent the seal from being forced into the plunger port. The foregoing provides a low friction valve wherein the plunger may be moved from one position to another with a minimum of force so that a relatively small solenoid may be used to provide the moving force for the plunger.
REFERENCES:
patent: 2883145 (1959-04-01), Sage
patent: 2955539 (1960-10-01), Gardner
patent: 3076476 (1963-02-01), Campbell
patent: 3430613 (1969-03-01), Barnes
patent: 3557824 (1971-01-01), Krehbiel
patent: 3580286 (1971-05-01), Bash
patent: 3603603 (1971-09-01), Woodson
patent: 3719199 (1973-03-01), Mentink
patent: 3819152 (1974-06-01), Clippard
Weakley Harold W.
Williams Michael
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