Combustion – Timer – programmer – retarder or condition responsive control – By condition of burner feed or feed means
Reexamination Certificate
2005-10-17
2010-06-29
Price, Carl D (Department: 3749)
Combustion
Timer, programmer, retarder or condition responsive control
By condition of burner feed or feed means
C431S012000, C431S018000
Reexamination Certificate
active
07744366
ABSTRACT:
A system and method for providing a heating system with good thermal efficiency by adjusting combustion air flow in response to fuel-input rate changes over a wide range. An AC motor operates in a slip mode whereby as the fuel-input rate changes, the combustion air density is affected. In response, changes in the load and thus the speed of the motor occur. Consequently, the quantity of combustion air flow increases in response to a fuel-input rate increase. The motor switches to a synchronous speed in response to the fuel-input rate reaching a set value, e.g., 70 percent of maximum rate.
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Hoffmann & Baron , LLP
Price Carl D
Thomas & Betts International Inc.
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