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Inventor: Powell; Louis D.
Address: Des Moines, IA
No. of patents: 3
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| D300772 |
Friction furnace |
April 18, 1989 |
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| D297045 |
Friction furnace |
August 2, 1988 |
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| 4462386 |
Hydraulic friction heater |
July 31, 1984 |
| A hydraulic friction heating device for providing thermostatically controlled heat to areas requiring heat for comfort or safety. The hydraulic friction heater includes a motor driven positive displacement pump which circulates hydraulic fluid, such as a heat transfer oil, through a |
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