Abstract: A seal assembly for sealing between first and second tubular members includes an annular seal body disposeable within an annular gland between the tubular members and formed of a generally compressible polymeric material. The seal body has a first axial sealing surface disposed against a first tubular member end surface, a second axial sealing member disposeable against a second tubular member end surface and a recess(es) defined partially by an angled activation surface. An annular backing ring formed of a substantially rigid material is disposed the body recess to couple the backing ring with the seal body. The backing ring has an outer axial end disposeable against the first member end surface to prevent radially outward displacement of the portions of the seal at the first member end surface and is biased axially toward the first member end surface when compression of the seal body displaces the activation surface axially.

Abstract: A seal assembly for sealing between first and second tubular members includes an annular seal body disposeable within an annular gland between the tubular members and formed of a generally compressible polymeric material. The seal body has a first axial sealing surface disposed against a first tubular member end surface, a second axial sealing member disposeable against a second tubular member end surface and a recess(es) defined partially by an angled activation surface. An annular backing ring formed of a substantially rigid material is disposed the body recess to couple the backing ring with the seal body. The backing ring has an outer axial end disposeable against the first member end surface to prevent radially outward displacement of the portions of the seal at the first member end surface and is biased axially toward the first member end surface when compression of the seal body displaces the activation surface axially.

Abstract: A seal assembly includes a generally annular primary seal member formed of a first, generally compressible polymeric material. The primary seal member has inner and outer radial ends, a first axial end disposeable against a first tubular member end surface and a second axial end disposeable against the second tubular member end surface. The first axial end has a radially-extending, generally annular primary sealing surface sealingly engageable with the first tubular member end surface. A generally annular secondary seal member is formed of a second, generally rigid polymeric material. The secondary seal member has two opposing axial ends and a radially-extending, generally annular secondary sealing surface on a first axial end. The secondary seal member is coupled with the first seal member such that the secondary sealing surface extends generally coaxially about the primary sealing surface, the secondary sealing surface being sealingly engageable with the first tubular member end surface.

Abstract: A rotary seal and rotary machine incorporating such a rotary seal. The rotary seal includes a first race defining a plurality of grooves, and a second race defining a plurality of sealing lips. The plurality of sealing lips are disposed in the plurality of grooves such that a compound seal is formed between the first and second races, and the first race and the second race are relatively rotatable.