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. 09, 1993
Filed:
Oct. 25, 1991
Applicant:
Inventor:
Jorg Wermelinger, Schaffhausen, CH;
Assignee:
Georg Fischer AG, Schaffhausen, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
285 21 ; 285423 ; 285398 ; 2851331 ; 285138 ;
Abstract
A method of connecting pipes of plastics material of a double pipe system and a pipe connection made by the method. The inner pipes of the pipe system are connected to each other with a sleeve member by welding or gluing. Clamping jaws are used for holding and moving the inner pipes toward each other. The outer pipes are shorter than the inner pipes at least by the thickness of the two clamping jaws. For bridging the gap between the outer pipes, an expandable intermediate ring is inserted in the gap. An electric welding sleeve is used for connecting the outer pipes and the intermediate ring.