Patent ID: 6863278

Claim:
An annular back-up ring for backing up a seal located in an annulus, the seal having a lower seal surface for sealing an inner surface of the annulus and for sealing an outer surface of the annulus, comprised of: a knitted mesh non-extrusion member; an outer elastomer coating covering substantially all of said knitted mesh non-extrusion member, said outer coating including a first non sealing binder surface of said knitted mesh non-extrusion member sized to extend adjacent to and in contact with the outer surface of the annulus and a second non sealing binder surface of said knitted mesh non-extrusion member sized to extend adjacent to and in contact with the inner surface of the annulus; said knitted mesh non-extrusion member having an upper surface shaped to conform to the shape of the lower surface of the seal; a support member having an upper surface, said knitted mesh non-extrusion member having a lower surface conforming to the shape of said upper surface of said support member.