The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 1990
Filed:
Dec. 09, 1988
Applicant:
Inventor:
Edward S Fort, Chitheroe, GB;
Assignee:
Fort Vale Engineering Limited, Lancashire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ; F16K / ;
U.S. Cl.
CPC ...
251357 ; 251356 ; 277182 ; 277198 ; 2772 / ; 277229 ; 2772 / ;
Abstract
A seal, especially for a valve, comprises a substantially rigid support member 10, an abutment envelope 22 made from polytetrafluoroethylene (PTFE) defining a volume between it and the support member, and a resiliently deformable, compressed, rubber sealing member 18 positioned in the volume. The PTFE envelope 22 is relatively chemically inert and allows the seal to be used in chemically harsh environments, the rubber sealing member 18 provides the necessary resilience and the rigid support member produces positive sealing. In a preferred embodiment, the sealing member 18, the abutment envelope 22 and the support member 10 are annular.