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:
Apr. 03, 1979
Filed:
Dec. 15, 1976
Applicant:
Inventor:
Paul Stahli, Jona, CH;
Assignee:
Geberit AG, Jona, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219535 ; 219544 ; 219522 ; 285 22 ; 285286 ; 264272 ;
Abstract
An electrically heatable welding muff for connecting plastic pipes has a heating wire winding disposed in a helical groove in its interior wall. To position the pipes to be connected snugly and accurately, longitudinal grooves are cut in the interior wall of the muff so that the material forced out of the grooves projects inwardly, forming resilient retaining tabs.