Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1985-07-31
1986-10-21
Ward, Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277212R, 285111, F16J 1518
Patent
active
046181547
ABSTRACT:
An annular lip type sealing ring includes an annular body with a generally U-shaped cross-section having a curved heel or base portion in the preferred embodiment and two spaced apart lip portions that define a groove therebetween. The groove terminates at a closed inner end portion near the heel or base and at its opposite end adjacent an open end portion. At least one of the lip portions has respective inwardly and outwardly extending lateral projections. The outwardly extending lateral projection seals against for example a valve shaft, pump plunger or the like. The lip portion has an outer free end with an outer arcuate curved surface. The inwardly extending laterally projecting portion includes an inner curved surface. An elastomer pre-loads the lips with a load that biases the lips to spread apart. The inwardly extending lateral projections conform to and confine the elastomer. The elastomer includes an elastomeric annular ring having a generally round cross-section before insertion into the groove and a diameter greater than the width of the groove so that the elastomeric ring assumes the generally oblong or obround shape of the groove during use and thus pre-loads the lips as it attempts to regain its original shape.
REFERENCES:
patent: 2634943 (1953-04-01), Gulick
patent: 3083023 (1963-03-01), Creavey
patent: 3172670 (1965-03-01), Pras
patent: 3653670 (1972-04-01), Sifri et al.
patent: 3698728 (1972-10-01), Walker
patent: 3851888 (1974-12-01), Limpson et al.
patent: 4057257 (1977-11-01), Berg
patent: 4174846 (1979-11-01), Scott
patent: 4328972 (1982-05-01), Albertson et al.
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