Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1989-04-10
1990-08-28
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Direct response valves
251332, F16K 1502
Patent
active
049517074
ABSTRACT:
A valve element for a fluid pump comprises a rigid body and a flexible ring-shaped seal mounted on the body. The body includes an annular groove around its outer periphery in which the seal is mounted. An outer surface of the groove forms a first contact surface which engages a second contact surface defined by an inner circumference of the seal. Those contact surfaces form an angle of from 5.degree. to 10.degree. with the longitudinal axis of the valve element to resist the creation of a gap between those surfaces. The seal includes a longitudinally projecting annular finger which is hooked into a correspondingly shaped channel of the recess to secure the seal to the body. The contact surface of the seal is configured to reduce the compression imposed on the front end of the seal so as to render that front end relatively flexible and able to effectively absorb forces applied thereagainst by grit disposed in fluid being pumped.
REFERENCES:
patent: 2260381 (1941-10-01), Kennon
patent: 2903235 (1959-09-01), Rodgers et al.
patent: 3053501 (1962-09-01), Varga
patent: 3092139 (1963-06-01), Rodgers et al.
patent: 3191617 (1965-06-01), Maddox
patent: 3324880 (1967-06-01), Roberts
patent: 3409039 (1968-11-01), Griffin
patent: 3444889 (1969-05-01), Kiel
patent: 3510103 (1970-05-01), Carsello
patent: 3742976 (1973-07-01), Bailey
National-Oilwell
Nilson Robert G.
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