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:
Mar. 15, 1983
Filed:
Mar. 04, 1981
Frederick G Britton, Bedford, TX (US);
William G Stanfield, Dallas, TX (US);
Don B Landers, Arlington, TX (US);
Oil States Industries, Inc., Arlington, TX (US);
Abstract
A diaphragm seal assembly for large tubes such as used as supporting legs in offshore platforms and pile drivers in underwater environments, with the diaphragm seal closure constructed to resist loads retained in such manner as to be nearly completely removed by upward tension pull on a pull-out cable. The diaphragm seal assembly is retained between rings welded inside a tubular member by a split ring forced apart to a retaining diameter by a removable key. Pull on a cable removes the key allowing the split ring to return to its initial smaller diameter size small enough to be removed up out of the tube along with the diaphragm closure member.