A shaft seal includes a case defining an axial portion and a radial portion, and a resilient PTFE sealing member is secured to the case by an elastomeric material, such as rubber, in an injection molding process. The elastomeric material forms an outer ring encasing the case axial portion and the outer portion of the resilient sealing element. The resilient sealing element is initially in the form of a disc-like member having a central aperture, and the shaft seal is formed by clamping the disc-like member and the case together within a pair of mold sections defining mold cavities corresponding to the desired final shape of the elastomeric material. After the elastomeric material has hardened, the seal is placed against a base and a mandrel is used to deflect the inner portion of the resilient sealing member relative to the outer portion. The seal may further include an excluder lip seal formed of the elastomeric material integrally with the ring. The excluder lip seal extends inwardly from the inner edge of the case radial portion, in a direction opposite that of the inner portion of the resilient sealing member.
The present invention is a seal adapted to be disposed about a cylindrical shaft. The seal includes a body portion having an aperture a lip surface defining an aperture extending axially therethrough. The seal includes a textured pattern formed on the lip surface. The seal further includes at least one rib, ridge or recess extending along the lip surface for retaining a lubricant between the lip surface and the cylindrical shaft.
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COOPER PRODUCTS, INC Mfg Gasket/Packing/Seals Mfg Mechanical Rubber Gd · All Other Rubber Prod Mfg