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. 18, 1989
Filed:
Sep. 18, 1987
David A Zollo, Houston, TX (US);
Roy W Benefield, Magnolia, TX (US);
David E Cain, Edinburgh, GB;
Phillip F Huang, Houston, TX (US);
Brenda K Montemayor, Houston, TX (US);
Ray Myers, Slidell, LA (US);
Stephen L Neeld, Spring, TX (US);
John C Vicic, Santa Cruz, CA (US);
Don B Wafer, Houston, TX (US);
FMC Corporation, Chicago, IL (US);
Abstract
A casing seal for use with a source of high pressure fluids with apparatus for preventing shredding of the seal with variations in fluid pressure. A T-shaped annular metal ring provides a multiplication of fluid pressure so pressure exerted on an elastomeric sealing ring is greater than the fluid pressure. This multiplication prevents gases from entering the elastomer and prevents shredding of the elastomer when pressure is released. The multiplication of pressure also forces the elastomer firmly against a casing and a casing head to provide a fluid-tight seal.