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:
Sep. 21, 1982
Filed:
May. 19, 1980
James C Holmes, San Francisco, CA (US);
Raychem Corporation, Menlo Park, CA (US);
Abstract
A method for permanently terminating pipelines by insertion of an adhesive coated, molded plug housing containing a biasing member which is typically a spring. The molded plug housing, or the spring, or both, are of heat-recoverable materials, i.e. materials which have been formed into a shape, subsequently deformed to a reduced diameter, and which recover towards their original heat stable shape on application of heat alone. The plug is heated to recover to or toward the heat stable greater-diameter shape thereby exerting pressure against the pipeline walls, forcing the adhesive into intimate contact with the inner surfaces of the pipeline, and thus affecting a permanent seal. The adhesive is preferably of the hot-melt type.