Welding sleeve and method for its manufacture

Details Welding sleeve and method for its manufacture Welding sleeve and method for its manufacture

1992-05-15

1993-10-26

Arola, Dave W.

Pipe joints or couplings

With assembly means or feature

Molded joint facilitator

285381, 219535, 1562742, F16L 1302

Patent

active

052559432

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

REFERENCES:
patent: 2001204 (1935-05-01), Long et al.
patent: 2121035 (1938-06-01), Hollister et al.
patent: 3506519 (1970-04-01), Blumenkranz
patent: 3943334 (1976-03-01), Sturm
patent: 4035534 (1977-07-01), Nyberg
patent: 4266997 (1981-05-01), Lippera
patent: 4424991 (1984-01-01), Hill et al.
patent: 4727242 (1988-02-01), Barfield

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