Sewer vent pipe anti ice-build-up apparatus

Details Sewer vent pipe anti ice-build-up apparatus Sewer vent pipe anti ice-build-up apparatus

1998-10-19

2000-08-01

Walberg, Teresa

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219213, H05B 306, H05B 100

Patent

active

060970081

ABSTRACT:
An annularly shaped housing extension is adapted to be inserted into the top of a coupling, the bottom of which is fitted on to the top end of a sewer vent pipe, the housing containing heating cable which, when energized, causes the transfer of heat from the heating cable to an inner sleeve of the housing which becomes a defacto extension of the vent pipe.

REFERENCES:
patent: 3766357 (1973-10-01), Koester
patent: 3985994 (1976-10-01), Eloranta et al.
patent: 4110603 (1978-08-01), Perterson et al.
patent: 4192988 (1980-03-01), Pederson et al.
patent: 4423311 (1983-12-01), Varney
patent: 4436988 (1984-03-01), Blumenkranz
patent: 4524262 (1985-06-01), Meyer
patent: 5129387 (1992-07-01), Behrens
patent: 5214266 (1993-05-01), Halone
patent: 5360333 (1994-11-01), Schmidt
patent: 5444227 (1995-08-01), Chestnut
patent: 5591367 (1997-01-01), Schwarkopf

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