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. 14, 1995
Filed:
Jul. 21, 1994
Hans Muller, W-4938 Schieder-Schwalengerg 2, DE;
Hermann Suerbaum, W-4938 Schieder-Schwalenberg, DE;
Other;
Abstract
An invertible tubular substrate of resin-permeated fibrous material is surrounded by an impermeable tubular film which, in turn, is surrounded by an impermeable tubular calibrating element. One end of the substrate is inserted into one end of a pipe which is to be lined from the inside, and the assembly of substrate, film and calibrating element is thereupon inverted into the pipe wherein the substrate is immediately adjacent the internal surface of the pipe and surrounds the film. The calibrating element is separable from the film and can be withdrawn from the interior of the inverted film by a flexible cord. The resin in the substrate sets upon inversion and maintains the inverted substrate in contact with the internal surface of the pipe.