Abstract: A sealing assembly especially adapted for high pressure hydraulic applications includes a circumferentially compressible seal ring having stepped overlapping ends and a resilient expander, preferably of oval cross-section, which assists in urging the compressed seal ring into sealing communication with the thus sealed surfaces. The seal ring is manufactured with an oversized closed gap condition from a filled synthetic material having a modulus of elasticity sufficient to permit compression thereof when the seal ring is installed between the thus sealed surfaces. The ring may optionally include a secondary resilient sealing member positioned between the axial, internal surfaces of the steps.

Abstract: U-ring-type packing having an enlarged lip configuration to provide dynamic resiliency with reduced wear and friction characteristics.

Abstract: A sealing assembly especially adapted for hydraulic applications including a first seal ring of one-piece construction having overlapping ends, one of which is provided with an elastomeric portion which is compressed in use both radially and axially. A resilient back up seal urges the outer ring into close contact with the sealed surface and cooperates with the elastomeric portion of the first seal ring to provide efficient and effective sealing under high pressure static and dynamic applications.