Anti-extrusion lip seal

摘要

An anti-extrusion lip seal device is disclosed for use that includes a flexible sealing lip portion supported by an annular braided anti-extrusion element. The braided anti-extrusion element is less resilient than the sealing lip portion to resist extrusion forces acting on the seal device. The braided anti-extrusion element includes fibers that are interconnected both laterally and radially. It is further impregnated with elastomeric or resinous material. Resiliency of the braided element may be adjusted during manufacture by varying the tightness of the braid as well as by variation of the resiliency of the impregnated material.