초록 ▼

A shaft seal (and method for making the same) of the type having an annular elastomeric body, a molded lip, and the molded lip having a liner of sintered polytetrafluoroethylene bonded thereto. The elastomer is molded simultaneously with the polytetrafluoroethylene liner being formed and bonded to t

A shaft seal (and method for making the same) of the type having an annular elastomeric body, a molded lip, and the molded lip having a liner of sintered polytetrafluoroethylene bonded thereto. The elastomer is molded simultaneously with the polytetrafluoroethylene liner being formed and bonded to the elastomer. The method for making the seal employs the same mold used to make common, molded lip elastomeric seals.

대표청구항 ▼

A shaft seal comprising an annular metal shell, an annular elastomeric body having a molded lip, said elastomeric body having an annular heel portion and an annular flex portion extending axially inwardly from a radially inner portion of said heel portion, said elastomeric body being generally U-sha

A shaft seal comprising an annular metal shell, an annular elastomeric body having a molded lip, said elastomeric body having an annular heel portion and an annular flex portion extending axially inwardly from a radially inner portion of said heel portion, said elastomeric body being generally U-shaped in radial cross-section, with the opening of the U facing axially inwardly, said heel portion having a radially outer, axially extending surface bonded to said shell, said molded lip having bonded thereto a hydraulically formed liner of uniform thickness of sintered polytetrafluoroethylene, said body being molded simultaneously with said liner being hydraulically formed from a ring of sintered polytetrafluoroethylene and bonded to said elastomeric body, and a plurality of hydraulically formed hydrodynamic pumping elements on a shaft-engaging surface of said liner and formed simultaneously with said liner being formed.