Electrically heated fluid conduit

Details Electrically heated fluid conduit Electrically heated fluid conduit

1980-02-21

1984-01-31

Bartis, A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

138 33, 138137, 138141, 219300, 219338, 219522, 219531, 264 455, 264 461, 428920, H05B 340, F24H 114, F16L 1112

Patent

active

044292139

ABSTRACT:
An electrically heated fluid conduit includes a plastic pipe adapted to carry a flow of fluid subject to freezing at low temperatures, an electric resistance heater disposed around the pipe and extending along the length thereof and a thermal insulating jacket disposed around the heater. The heater is formed as a seamless sleeve of synthetic polymeric material having electrically conductive carbonaceous particles therein and is connected to the lead wires of an electrical power cable by a pair of spaced electrically conductive bands fixed around the sleeve and defining the length of the heater along the pipe. The thermal insulating jacket is formed as a seamless layer of foamed synthetic plastic material having randomly disposed air pockets. The outer portion of the jacket is compacted to reduce size of the air pockets immediately adjacent to the outer surface of the jacket so that the jacket has a higher density wear and impact resistant outer surface and good thermal insulating properties adjacent the pipe and heater.

REFERENCES:
patent: 1202957 (1916-10-01), Baugham
patent: 2211380 (1940-08-01), Mikkelson
patent: 3338476 (1967-08-01), Marcoux
patent: 3355572 (1967-11-01), Chrow
patent: 3359351 (1967-12-01), Bender
patent: 3476841 (1969-11-01), Bienert
patent: 3582968 (1971-06-01), Buiting et al.
patent: 3619560 (1971-11-01), Buiting et al.
patent: 3654061 (1972-04-01), Berwanger
patent: 4146562 (1979-03-01), Fukushima et al.
patent: 4156127 (1979-05-01), Sako et al.

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