Pump driven by brushless motor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 7, 2000
Grant Date -
N/A
app pub date -
Jul 30, 1998
filing date -
Aug 6, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pump including a pump casing having an inlet and an outlet, and an impeller having a rotary axis and being rotatably mounted within the pump casing for rotation about the rotary axis is provided. The impeller is configured and positioned relative to the pump casing so that the rotation of the impeller is effective to urge fluid from the inlet to flow through the outlet. A rotor assembly, coupled to and rotatable with the impeller, is provided with a plurality of permanent magnetic poles which are arranged in a generally flat array. A stator assembly is spaced apart from and generally facing the generally flat array of magnetic poles and includes a stator and a plurality of magnetic windings positioned and adapted to effect rotation of the rotor and the impeller upon energization thereof. A bulkhead is positioned between the rotor and the stator. The bulkhead includes a centrally located mounting feature. A stationary axle is located partially in and supported by the mounting feature and extends outwardly across the bulkhead. A bearing is rotatably mounted on the axle and is adapted to rotate with the rotor assembly and the impeller. A heatsink member is provided and is effective to conductively remove heat generated by the stator assembly and electronic controls.
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