Electrical heatable muff and process for its manufacture

Details Electrical heatable muff and process for its manufacture Electrical heatable muff and process for its manufacture

1976-12-15

1979-04-03

Truhe, J. V.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219544, 219522, 285 22, 285286, 264272, H05B 358

Patent

active

041479262

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.

REFERENCES:
patent: 1980561 (1934-11-01), Wagner
patent: 3062940 (1962-11-01), Bauer et al.
patent: 3179445 (1965-04-01), Moretti
patent: 3208757 (1965-09-01), Jageman
patent: 3563574 (1971-02-01), Jackson
patent: 3792878 (1974-02-01), Freeman
patent: 3797865 (1974-03-01), Ballentine
patent: 3943334 (1976-03-01), Sturm
patent: 3987276 (1976-10-01), Vogelsanger

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