Check valve and backflow preventer

Details Check valve and backflow preventer Check valve and backflow preventer

1996-08-07

1998-01-20

Ferensic, Denise L.

Fluid handling

Line condition change responsive valves

Direct response valves

1375274, 251358, 251363, F16K 1500

Patent

active

057092400

ABSTRACT:
A check valve or backflow preventer has a valve mechanism mounted to a valve cover for removal and replacement as a unit. The valve clapper is resiliently supported to accommodate variations in tolerance. The valve seat is removably secured within the valve body by compression of a resilient seal ring to engage opposed walls of the seat and body. A spring pretensioning member facilitates safe replacement and removal of the valve mechanism.

REFERENCES:
patent: 378846 (1888-02-01), Murphy
patent: 991784 (1911-05-01), Kiley
patent: 1949614 (1934-03-01), McDonald
patent: 2324880 (1943-07-01), Rogers
patent: 2702686 (1955-02-01), Fortune
patent: 2744539 (1956-05-01), Jones
patent: 2827921 (1958-03-01), Sherman
patent: 2864394 (1958-12-01), Hempel
patent: 2925827 (1960-02-01), Anderson et al.
patent: 3075547 (1963-01-01), Scaramucci
patent: 3155009 (1964-11-01), Murek
patent: 3173439 (1965-03-01), Griswold et al.
patent: 3283772 (1966-11-01), Ensign
patent: 3295550 (1967-01-01), Scaramucci
patent: 3331391 (1967-07-01), Merdinyan
patent: 3478778 (1969-11-01), Curtiss et al.
patent: 3996962 (1976-12-01), Sutherland
patent: 4188973 (1980-02-01), Weise et al.
patent: 4274436 (1981-06-01), Smith
patent: 4304255 (1981-12-01), Prince
patent: 4508139 (1985-04-01), Teumer
patent: 4552174 (1985-11-01), Carl et al.
patent: 4669500 (1987-06-01), Strelow
patent: 4813650 (1989-03-01), Dingler
patent: 5107888 (1992-04-01), Dunmire
Ames Detailed Parts Listing, Ames Company, Inc., pp. 1-8.
Series 007 Double Check Valve Backflow Preventers Installation Service Replacement Parts and Maintenance, Watts Regulator Company, pp. 1-4.
Conbraco Backflow Preventers, Conbraco Industries, Inc., pp. 1-43.
Flomatic Backflow Preventers, Flomatic Corporation, Mar., 1993.
Watts Series 700 Double Check Valve Assembly Field Testing Prodecure, Watts Regulator Company.
Series 009 Reduced Pressure Zone Backflow Preventers Installation Service Replacement Parts and Maintenance, Watts Regulator Company, pp. 1-8.
Ames Installation Maintenance and Parts Manual for Backflow Prevention Assemblies, Ames Company, Inc., pp. 1-16.
FEBCO Operations & Maintenance Manual for Reduced Pressure Backflow Preventers, FEBCO, A Division of CMB Industries, Jun., 1989, pp. 1-31.
Wilkins Division Produce Catalog, Zurn Wilkins Division, May, 1994, pp. 1-32.
Watts Backflow Prevention Products, Watts Regulator Company, pp. 1-28.
Ames Fluid Control Systems, Ames Company.

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