Title: Molded lip seal with polytetrafluoroethylene liner and method for making the same

Abstract: 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.

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Inventors: Bainard, Dean R. (Clover, SC, US)
Denton, Dennis N. (Gastonia, NC, US)

Application Number: 027003
Filing Date: 1979-04-04
Publication_date: 1980-12-16
Assignee: Garlock Inc. (Longview, TX)
Primary Class(es): 277/559 277/560, 277/569, 277/575, 277/924
Other Classes:
US Patent Ref:

2736585	Feb, 1956	Riesing	277/223.
2804324	Aug, 1957	Stallings	277/223.
2804325	Aug, 1957	Riesing	277/223.
2998397	Aug, 1961	Riesing	277/DIG.
3276115	Oct, 1966	Hansz	29/527.
3493645	Feb, 1970	Sanderson et al.	264/161.
3923315	Dec, 1975	Hadaway	277/134.
3929341	Dec, 1975	Clark	277/DIG.
3973781	Aug, 1976	Grorich	277/153.
4066269	Jan, 1978	Linne	277/228.
4159298	Jun, 1979	Bainard	29/527.

Other Refs: 2218376

Nov, 1972	DE

Primary Examiner: Ward, Jr., Robert S.
Assistant Examiner:
Attorney: Schovee & Boston