Electric heating – Heating devices – Combined with diverse-type art device
Patent
1989-06-01
1991-05-21
Bartis, Anthony
Electric heating
Heating devices
Combined with diverse-type art device
1231425E, 1841041, 1841042, 219535, 219536, 219549, 392444, H05B 300, F16N 3904, F01M 502
Patent
active
050177583
ABSTRACT:
A selected quantity of lubricating oil in the reservoir of an oil system exposed to low ambient temperatures is maintained at a temperature above 170 degrees F. but below the oil breakdown temperature of 300 degrees F. by a non-thermostatically controlled flexible planar electric heating element adhesively secured to the exterior surface of the reservoir. The heating element has a uniform power density of at least about 15 watts per square inch and a constant power output of about 20 to 40 watts per quart of oil in the reservoir. The thermal balance formed between the continuous heat generation by the heating element and the continual heat dissipation from the oil system maintains the oil temperature between the desired limits.
REFERENCES:
patent: 1781412 (1930-11-01), Slichter
patent: 2475989 (1949-07-01), Ronning
patent: 2698374 (1954-12-01), Carpenter
patent: 2721253 (1955-10-01), Langlois
patent: 2838648 (1958-06-01), Ladue
patent: 3213263 (1965-10-01), Steenbergen
patent: 3243573 (1966-03-01), Weisse et al.
patent: 4395618 (1983-07-01), Cunningham
patent: 4776529 (1988-10-01), Tanis
Heath William D.
Kirkman Todd A.
Bartis Anthony
Toddco Research and Development Company, Inc.
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