Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1977-08-26
1979-04-10
Cline, William R.
Fluid handling
Line condition change responsive valves
Direct response valves
1374542, 137551, 137543, 251361, F16K 1506
Patent
active
041483383
ABSTRACT:
Improvements in a check valve are disclosed. The check valve contemplated is of the type used to halt fluid flow in a fluid-carrying pipe system, and comprises an annular seat adapted to be mounted in the fluid line, a head-mounting yoke, and a head carried by the yoke and adapted to slide axially into and out of fluid-sealing engagement with the seat. One improvement comprises a pair of valve sleeves extending, respectively, axially upstream and downstream of the valve seat; each valve has a mouth adapted for mating connection with adjacent fluid-carrying pipe structure. Each sleeve terminates adjacent the valve seat in a diagonal flange formation, and a clamp including a V-shaped collar fits over the sleeve flanges so as to urge the sleeves toward the valve seat and toward one another. A gasket having a U-shaped cross section provides a fluid-tight seal between the sleeves and seat. A finger extends radially from the seat through a sealing aperture in the gasket to a position outside the valve and piping structure. This finger includes a tip marked to indicate to an observer the direction in which fluid flow is permitted through the check valve.
REFERENCES:
patent: 818670 (1906-04-01), Dumbotton
patent: 1260663 (1918-03-01), Gould et al.
patent: 2241758 (1941-05-01), Baldine
patent: 2351874 (1944-06-01), Parker
patent: 2628063 (1953-02-01), Hollerith
patent: 2729237 (1956-01-01), Hite
patent: 2729238 (1956-01-01), Hite
patent: 2912218 (1959-11-01), Stillwagon
patent: 3918678 (1975-11-01), Rechtsteiner
Cline William R.
Mojonnier Bros. Co.
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