Back to results
US 4,951,707 AGranted
Seal for a pump valve
AssigneeNational-Oilwell, L.P.
InventorJerry E. Johnson
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNational-Oilwell, L.P.
InventorJerry E. Johnson
Estimating the term…
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.
A valve element comprising:
A seal adapted to be mounted in a groove of a rigid valve body, said seal being ring-shaped and defining a longitudinal axis, said seal formed of an elastomeric material and including a generally radially inwardly projecting lip adapted to be received in a recess of the body, a generally axially forwardly facing sealing face, and a radially inwardly facing contact surface disposed between said sealing face and said lip and adapted to engage a radially outwardly facing contact surface of the body, said contact surface of said seal being of forwardly tapering frusto-conical configuration which extends forwardly to said sealing face, whereby said inner contact surface defines a progressively reducing diameter toward said sealing face.
A seal adapted to be mounted in a groove of a rigid valve body, said seal being ring-shaped and defining a longitudinal axis, said seal formed of an elastomeric material and including a generally radially inwardly projecting lip adapted to be received in a recess of the body, an axially forwardly facing sealing face, and a radially inwardly facing contact surface disposed between said sealing face and said lip and adapted to engage a radially outwardly facing contact surface of the body, said sealing face comprising radially inner and outer forwardly facing frusto-conical portions, said inner portion facing axially forwardly and radially inwardly and said outer portion facing axially forwardly and radially outwardly.
A valve assembly comprising:
Dependencies are inferred from the claim text.