Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1977-06-29
1980-05-06
Cline, William R.
Fluid handling
Line condition change responsive valves
Direct response valves
1374542, F16K 1503
Patent
active
042012414
ABSTRACT:
A check valve apparatus provides an overall valve body which can be placed in any typical flow line, a removable seat being provided at the inner portion of the valve body, the seat having a center orifice through which fluids can flow. The seat can be attached using a plurality of temporary tensile connectors, and the seat having a recess which receives a valving member therein. The valving member pivots in the seat and is weighted to a degree which aids in closure under static flow conditions. A closure spring can be added to further insure closure of the valve when desirable. In the preferred embodiment, the valving member pivots in the valve seat a distance less than ninety degrees, thus insuring valve closure during back flow conditions, the valving member projecting at least some degree into the line of flow of the fluid stream.
REFERENCES:
patent: 2419318 (1947-04-01), Johnson
patent: 2767735 (1956-10-01), Darling
patent: 3058534 (1962-10-01), Keithahn
patent: 3565107 (1971-02-01), Bunch
patent: 3817277 (1974-06-01), Wheatley
patent: 3933173 (1976-01-01), Kajita
patent: 3990471 (1976-11-01), Schutzer
patent: 4061535 (1977-12-01), Nolan et al.
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