Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Reexamination Certificate
2004-05-17
2008-10-07
Tapolcai, William E (Department: 3744)
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
C122S013010
Reexamination Certificate
active
07431568
ABSTRACT:
A draft inducer is disclosed. The draft inducer includes an impeller having one or more backward curved blades. The impeller is coupled to a motor which is preferably a DC motor. The DC motor resides at the center of the impeller and is housed within the impeller structure. The draft inducer may be mounted on a hot water heater between the hot and cold water pipes such that the impeller spins about a vertical axis.
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Bowen Philip J.
Brown Fred A.
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