Abstract: A sealing assembly for sealing a clearance space between first and second members wherein the first member has a groove therein and the second member has a surface overlying the groove. The groove is defined by a base surface and two side surfaces. The first and second members are displaceable with respect to each other. The seal assembly includes a flexible generally annular sealing ring, generally T-shaped in cross section for being positioned within the groove. The ring has an axially extending leg intersecting a radially extending leg. The axially extending leg is for being positioned in engagement with the base surface of the groove. The radially extending leg includes converging side surfaces merging into converging end surfaces. The end surfaces are generally linear in cross section and merge into a generally arcuate transition surface when the ring is in an uncompressed state.

Abstract: A seal element for installation in an annular groove having a mouth, first and second radial surfaces, and an axial surface therebetween. The seal element has a first radial surface which forms an acute heel angle with the groove first radial surface, and the seal element forms an inner static area adjacent the groove axial surface and first radial surface. Upon installation of a rod and low pressure application, the seal element is compressed into the groove, and the seal element first radial surface is moved into contact with the groove first radial surface. Thus, the seal element prevents contamination from entering into the inner static area. The seal element has first and second angled surfaces forming a high pressure sealing line and third and fourth angled surfaces forming a low pressure sealing line with a stress-relieving radius interconnecting the second and third angled surfaces.