Fluid handling – Systems – Multi-way valve unit
Patent
1982-05-27
1984-11-06
Cohan, Alan
Fluid handling
Systems
Multi-way valve unit
1376253, 13762547, 251121, F16K 11085
Patent
active
044806620
ABSTRACT:
A fluid pressure equalizing valve adapted for use in hydraulic systems includes a valve body having fluid inlet, working and vent ports, a valve plug in the valve body having a working passageway and a vent passageway formed therein and communicating with the peripheral wall thereof, the plug being rotatable in the valve body between a working position wherein the working passageway is aligned with the inlet and working ports and a vent position wherein the vent passageway is aligned with the inlet and vent ports. The valve plug includes a plurality of orifice passageways formed therein communicating the peripheral wall thereof with the vent passageway, each orifice passageway having a substantially smaller diameter than the working passageway. Means are provided for preventing fluid flow through the orifice passageways when the valve plug is in the working and vent positions. At least one orifice passageway communicates at least one of the inlet and working ports with the vent ports via the vent passageway as the valve plug moves between working and vent positions. The orifice passageways may be of varying sizes and shapes and may be selectively closed by removably insertable plug means. Rotation of the valve plug within the valve body is desirably achieved using hydraulic means, but other means may be used.
REFERENCES:
patent: 1810331 (1931-06-01), Wilhjelm
patent: 2229931 (1941-01-01), Parker
patent: 2853099 (1958-09-01), Eitel
patent: 3023783 (1962-03-01), Vickery
patent: 3134405 (1964-05-01), White et al.
patent: 3821968 (1974-07-01), Barb
patent: 4219049 (1980-08-01), Skelly
Cohan Alan
Malkin Mark
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