| 摘要 |
A fluid seal assembly comprising, in combination, a casing unit having axial and radial flanges, and an elastomeric lip body portion comprising frustoconical air and oil side surfaces meeting at an inner diameter portion so as to form a fluid seal band adapted to contact an associated shaft in use, a continous, circumferentially extending garter spring embedded in said lip body, an axially inner surface of said lip body defined in part by plural spaced apart ribs and the remainder being defined by pockets having portions lying closely adhacent the radially and axially innermost portions of said garter spring, said lip body portion being joined to a radially inner portion of said casing radial flange by a flexible neck section of thin radial cross section, said garter spring, in the free state of said seal, exerting an axially inwardly directed preload force so as to resist radial expansion of said seal and the elastomeric material comprising said lip body acting radially inwardly on said spring to place said spring under a radial compressive load, said spring also resisting dimensional shrinkage of said seal band.
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