Stoves and furnaces – Heaters – Surface
Patent
1994-05-31
1995-08-15
Yeung, James C.
Stoves and furnaces
Heaters
Surface
1262712R, 126 91A, F23C 500
Patent
active
054410380
ABSTRACT:
The invention is a highly portable ground defrosting device that has a manually portable housing which includes a sidewall, a roof connected to the side wall and an open bottom. The side wall and roof each have a coefficient of thermal conductivity of less than about 0.6 BTU-in/hr-ft.sup.2 -.degree. F. at 400.degree. F., and the side wall and roof together define an enclosed heating chamber. At least one port extends through the side wall for receiving a removable burner which substantially occupies and is exhausted through the one port so that the chamber is substantially airtight as the apparatus rests on the ground.
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Brochure entitled "Is Frozen Ground Putting a Freeze on Your Cold Weather Maintenance Budget?", distributed by Thawmaster, Minneapolis, Minn.
Brochure entitled "The Frost Hog by Leric-The Clean Efficient Economical Frost Removal System," distributed by Leric Holdings ltd., Lloydminster, Alberta, Canada.
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