초록 ▼

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

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.

대표청구항 ▼

An annular lip type sealing ring apparatus comprising: a. an annular body with U-shaped cross-section having a heel portion and two spaced apart lip portions that define a groove therebetween, the groove terminating at a closed end portion near the heel and at an opposite open end portion; b. each l

An annular lip type sealing ring apparatus comprising: a. an annular body with U-shaped cross-section having a heel portion and two spaced apart lip portions that define a groove therebetween, the groove terminating at a closed end portion near the heel and at an opposite open end portion; b. each lip portion having an outer free end with an outer arcuate curved surface; c. at least one of the lip portions having respective inwardly and outwardly extending lateral projections; d. the inwardly extending lateral projection including an inner curved surface; e. means for preloading the lips with a load that biases the lips to spread apart prior to installation of the sealing ring in a packing space, comprising an elastomeric annular ring having a generally round cross-section before insertion into the groove and a cross-sectional diameter greater than the width of the groove so that the elastomeric annular ring defines an interference fit with the annular body when it is placed in the groove.