Slow-close apparatus for minimizing water hammer and/or shock wa

Details Slow-close apparatus for minimizing water hammer and/or shock wa Slow-close apparatus for minimizing water hammer and/or shock wa

1987-10-14

1989-08-08

Hepperle, Stephen

Fluid handling

Systems

Multiple inlet with single outlet

137883, 188306, 251 54, F16K 4702

Patent

active

048543446

ABSTRACT:
Apparatus for minimizing water hammer and/or shock waves resulting from closure of a valve member disposed for movement into and out of closing arrangement in valve means included within a fluid flow system. The apparatus comprises a piston and cylinder arrangement having a circular path of travel, the cylinder being formed in part as an incised channel means in a body means, within which body means a rotatable sleeve means is disposed in a longitudinal bore. The inner portion of the cylinder is the outer surface of the rotatable sleeve, and a fluid chamber is formed by said combination. The piston means projects outwardly from the sleeve and is disposed within the channel means, so that the piston means sweeps the cylinder volume as the sleeve is rotated. An adjustable orifice is provided in the cylinder means to constrict the flow of fluid in said cylinder on rotation of the sleeve. A fluid is supplied to the piston and cylinder arrangement, and the valve member is connected with said sleeve such that displacement of the valve results rotational movement of the sleeve, which is resisted by the fluid and orifice means.

REFERENCES:
patent: 1077502 (1913-11-01), Anderson
patent: 1171169 (1916-02-01), Carter
patent: 1260761 (1918-03-01), Donahoo
patent: 2078231 (1937-04-01), Brisbane
patent: 2790520 (1957-04-01), Kuhn
patent: 2832563 (1958-04-01), Walsh
patent: 3422843 (1969-01-01), Blackman et al.
patent: 3688645 (1972-09-01), Reaves
patent: 4286621 (1981-09-01), Glahn

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