Mold for forming a seal with embedded garter spring

Details Mold for forming a seal with embedded garter spring Mold for forming a seal with embedded garter spring

1997-09-05

1999-07-27

Davis, Robert

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

And means to apply stress to preform and uniting in stressed...

249 91, 425125, 425DIG47, B29C 4318

Patent

active

059286768

ABSTRACT:
A fluid seal including a casing unit and an elastomeric lip body portion. Frustoconical air and oil side surfaces of the lip body meet at an inner diameter portion to form a fluid seal band contacting an associated shaft in use. A continuous, circumferentially extending garter spring is embedded in the seal lip body. An axially inner surface of the lip body is defined in part by plural spaced apart ribs and the remainder is defined by pockets having portions lying closely adjacent the radially and axially innermost portions of the garter spring. In the free state of said seal, the garter spring exerts a radially inwardly directed preload force so as to resist radial expansion of said seal. The spring also resists dimensional shrinkage of the seal band and the remainder of the seal body.

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