Unitized check valve

Details Unitized check valve Unitized check valve

1986-06-17

1987-05-26

Scott, Samuel

Fluid handling

Line condition change responsive valves

Direct response valves

1375155, 137315, F16K 1700

Patent

active

046676970

ABSTRACT:
A unitized check valve for use with corrosive fluid includes a generally cylindrical body. A valve seat is disposed in the body and a first set of angularly spaced apart arcuate flanges depends from the outlet end. A valve disk is coaxially associated with the seat and is adapted for axial movement to block and unblock the aperture in order to control the flow of fluid through the body. A valve retainer has a second set of angularly spaced apart arcuate flanges. The flanges of one of the sets extend generally radially inwardly and the flanges of the other one of the sets extend generally radially outwardly. The flanges of the second set are positionable between adjacent ones of the flanges of the first set. A coil spring bears against the valve disk and the retainer and is responsive to flow fluctuations on the disk for thereby permitting movement of the disk. Alignment of the flanges of the second set between the flanges of the first set and rotation of the retainer causes the flanges of the second set to be engaged with the flanges of the first set for thereby preventing axial displacement of the retainer so to maintain the valve in operative condition.

REFERENCES:
patent: 521027 (1894-06-01), Hess
patent: 744646 (1903-11-01), Tietz
patent: 850410 (1907-04-01), Weatherhead
patent: 995861 (1911-06-01), Gleason
patent: 1507230 (1924-09-01), Cloflin
patent: 1644265 (1927-10-01), Noble
patent: 1860004 (1932-05-01), Yardley
patent: 1938418 (1933-12-01), Evans
patent: 2888238 (1959-05-01), Leathers et al.
patent: 3162470 (1964-12-01), Davidson et al.
patent: 3503418 (1970-03-01), Petrucci et al.
patent: 4453561 (1984-06-01), Sands
patent: 4479508 (1984-10-01), Breed
patent: 4566723 (1986-01-01), Schulze et al.

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