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:
Feb. 03, 1987
Filed:
Dec. 19, 1983
Robert K Stanley, Tampa, FL (US);
Other;
Abstract
Pipelines for transporting sewage, water, slurries, liquid and gaseous hydrocarbons, and like materials are interlined with a composite tubular lining having an inner skin layer and a foamed layer contiguous with the inner skin layer. The foamed layer is either contiguous also, along its opposite surface, with the inner wall of the pipe or may be spaced therefrom by an outer skin layer of the composite lining. The lining may be applied either before the pipeline is placed into service or afterward, whether in situ or removed for maintenance or repair. For application in situ the lining is preferably more flexible than will suffice for insertion into new pipes. The lining itself is formed by extruding polymeric tubing for the inner layer and stabilizing it dimensionally, somewhat smaller than the pipe to be lined, then applying contiguously to the layer so formed a layer of foamable polymeric material, and optionally applying to the outer surface of the foamable layer a dimensionally expansible outer skin layer. The lining is inserted into the pipe to be lined, juxtaposed circumferentially to or near the inner wall of the pipe, then the foamable layer is foamed to expand the lining against the pipe wall, thereby lining the pipe.