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:
Mar. 09, 1976
Filed:
Mar. 08, 1974
Applicant:
Inventor:
Werner Sturm, Hagendorf, CH;
Assignee:
Von Roll AG, Gerlafingen, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219544 ; 174 / ; 156380 ; 264272 ; 219535 ; 285 21 ; 285292 ;
Abstract
To permit efficient heat welding of pipe fittings, and the like, of thermpolastic material to thermoplastic pipes, by electrically heating of the fitting, the fitting is made in two concentric portions, the inner portion having a heating wire applied to the outside thereof, the heating wire and inner portion being covered by the outer portion, for example injected thereover.