Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1992-01-16
1993-08-17
Rivell, John
Fluid handling
Line condition change responsive valves
Direct response valves
137512, 1374542, 251337, F16K 1503
Patent
active
052360091
ABSTRACT:
A toggle linkage check valve includes a housing having an inlet and an outlet, and a valve assembly disposed within the housing. The valve assembly includes (i) a sealing plug adapted for movement between a first, closed position for preventing flow of liquid between the inlet and the outlet, and a second, open position for substantially permitting flow of liquid between the inlet and the outlet, and (ii) a spring assembly removably disposed within the valve assembly. The spring assembly contacts the sealing plug and biases the sealing plug towards the first, closed position. The spring assembly comprises a rod member and means for biasing the rod member toward the sealing plug. In the second, open position of the sealing plug, the rod member lies at an acute angle to a plane of the sealing plug.
REFERENCES:
patent: 1399791 (1921-12-01), Pierson
patent: 1871536 (1932-08-01), Le Bus
patent: 2515425 (1950-07-01), Restemeier
patent: 2556277 (1951-06-01), Hill et al.
patent: 2626124 (1953-01-01), McCarthy
patent: 2748788 (1956-06-01), Duckstein
patent: 3026902 (1962-03-01), Ruhl, Jr.
patent: 3276465 (1966-10-01), Wyckoff
patent: 3313458 (1967-04-01), Braun
patent: 3478778 (1969-11-01), Curtiss et al.
patent: 3482603 (1969-12-01), Outcalt
patent: 3604453 (1971-09-01), Boltnott
patent: 3789874 (1974-02-01), Hills
patent: 3817273 (1974-06-01), Erwin, Jr.
patent: 3857408 (1974-12-01), Rhodes et al.
patent: 3974848 (1976-08-01), Wheatley
patent: 3996962 (1976-12-01), Sutherland
patent: 4019532 (1977-04-01), Schittek
patent: 4067356 (1978-01-01), Kreuz
patent: 4569248 (1986-06-01), Lieberman
patent: 4569636 (1986-02-01), Bauer et al.
patent: 4989635 (1991-02-01), Dunmire
patent: 5046525 (1991-09-01), Powell
patent: 5072753 (1991-12-01), Ackroyd
"Check Valves", Ames (brochure).
"Dual Function Swing Check Valves", Merit Manufacturing Corporation (brochure).
Catalog C-91, Watts Regulator Company.
Rivell John
Watts Investment Company
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