Stoves and furnaces – Stoves – Cooking
Reexamination Certificate
2000-03-06
2001-07-10
Lazarus, Ira S. (Department: 3743)
Stoves and furnaces
Stoves
Cooking
C126S00900B, C126S0250AA, C099S339000
Reexamination Certificate
active
06257227
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to barbecue grills, but more specifically, to methods and improvements for producing hot water, steam and/or power from the heat source of a conventional vertical or horizontal-type barbecue grill.
The improvements provided herein are particular useful for barbecue grills used in an environment where hot water, steam, or power is not readily or conveniently available. Users of portable grills for camping, picnicking, and boating will benefit greatly. For backyard grills, power is often desired and provided for rotisseries, lighting, or other needs. One advantage includes utilization of the barbecue grill's waste heat to provide on-demand hot water and/or power for purposes generally used in a home, and with quiet operation.
SUMMARY OF THE INVENTION
In accordance with the present invention, the improvement comprises a water tank and/or a heat exchanger located in heat transfer proximity of a source of heat of a barbecue grill, an opening in the tank and/or heat exchanger for receiving water, a discharge port for delivering heated water, and optionally a valve for controlling the flow of water from said tank.
In accordance with another feature of the present invention, a method of heating water or generating power from waste heat of a barbecue grill comprises providing a source of heat in a barbecue grill, providing a tank and/or a heat exchanger in the barbecue grill, filling the tank and/or heat exchanger with water (or other fluid), subjecting the tank and/or heat exchanger to a source of heat, and extracting hot water or converting pressurized steam (or other fluid) to mechanical or electrical power. Power generation may operate in an open or closed cycle.
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Lazarus Ira S.
Lee David
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