Patent · US Expired

Welding sleeve and method for its manufacture

US5255943A · kind A · utility

9Cited by

8References

5Claims

0Family size

Assignee

Georg Fischer Rohrleitungssysteme AG · CH

Inventors

Friedhelm Keller · Donaueschingen, DE
Dirk Petry · Feuerthalen, CH
Helmut Hilger · Beringen, CH

Key dates

Filing date	May 15, 1992
Grant date	Oct 26, 1993
Priority date	—
Expiry date	May 15, 2012

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C66/71
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A welding sleeve is disclosed comprising a sleeve member of thermoplastic weldable material having a resistor wire winding at the internal surface thereof. A reinforcement ring of thermoplastic material is frictionally connected with the external circumference of the sleeve member

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.