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:
Jul. 03, 1984
Filed:
Dec. 09, 1982
Richard L Dudman, Euclid, OH (US);
EGC Enterprises Incorp., Mentor, OH (US);
Abstract
An extreme-temperature annular sealing element and a sealing device using such a sealing element is provided herein. The annular sealing element (10) is composed of a flexible expanded graphite body (14) with a protective metallic sheath (12) over a portion of the outer surface of said flexible expanded graphite body. One end surface (24) of the flexible expanded graphite body is exposed so that the annular sealing element can resiliently respond under repetitive loading and unloading pressures. The metallic sheath is thick enough to be durable yet thin enough to permit the flexible graphite body to resiliently yield and conform to a rotatable opposed member, such as a ball valve.