Manual air relief valve

Details Manual air relief valve Manual air relief valve

1993-04-07

1995-07-25

Walton, George L.

Fluid handling

With repair, tapping, assembly, or disassembly means

Assembling, disassembling, or removing cartridge type valve

137557, 251 95, 251104, 251107, 251215, 251252, 251288, F16K 17168

Patent

active

054353394

ABSTRACT:
A manually operable pressure relief valve for swimming pool filter systems and the like, including a valve housing, a valve stem movable axially in the housing to open and close the valve, and a top cover that serves as an operating handle. The valve housing and the valve stem have components that cooperate to provide an axial movement from closed to fully open with only a quarter turn of the stem, and to prevent inadvertent removal of the stem from the housing. The stem must be moved deliberately through a sequence of required rotational and axial displacements to remove it. The top cover must also be manipulated in a prescribed manner to effect removal of the stem from the housing.

REFERENCES:
patent: 168657 (1875-10-01), McLaughlin
patent: 1597794 (1926-08-01), Horsbaugh
patent: 2723829 (1955-11-01), Anderson
patent: 3062496 (1962-11-01), Stehlin
patent: 3134401 (1964-05-01), Kelly et al.
patent: 3272230 (1966-09-01), Bolling
patent: 3434694 (1969-03-01), Skinner
patent: 3826467 (1974-07-01), Hart et al.
patent: 4293117 (1981-10-01), Mueller
patent: 4666124 (1987-05-01), Giacobbi
patent: 5005805 (1991-04-01), Morris et al.
patent: 5064168 (1991-11-01), Raines et al.

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