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. 14, 1998
Filed:
Mar. 24, 1995
William C Allen, Pasadena, CA (US);
Union Oil Company of California, El Segundo, CA (US);
Abstract
Single or multi-piece, pipe joint seal elements have at least one slidable interface that contacts a sealing surface of an end ring attached to a cementitious pipe liner. The slidable interface allows for slippage between seal pieces and/or seal piece-end ring surfaces during pipe joint assembly and disassembly. The end rings help distribute and minimize rotational and other stresses exerted upon the liner end surfaces and seal pieces. Such end ring surfaces further provide a quality surface for the seal element to effect a seal. The slidable interface seal is especially useful for joining brittle-lined pipe sections handling harsh fluids such as geothermal brine, etc.