Pumps – Motor driven – Electric or magnetic motor
Patent
1997-09-24
1999-09-14
Thorpe, Timothy S.
Pumps
Motor driven
Electric or magnetic motor
4174237, F04B 3504
Patent
active
059512679
ABSTRACT:
A diaphragm system is provided for isolating a motor stator from pumped fluid in a seal-less integral-motor pump, the pump having a non-rotating shaft fixed to a motor housing containing the motor stator, the shaft extending into a pump casing within which an impeller is integrated with a motor rotor. The diaphragm system includes a non-metallic diaphragm having a periphery, which conforms to and is clamped between mating surfaces of the housing and the pump casing, and a central circular hole, which surrounds the shaft and is clamped thereby against the housing. Clamping pressure on the diaphragm is limited, and static and dynamic bearing forces are passed directly from the shaft to the housing to minimize creep distortion of the diaphragm which could cause early failure of the pump.
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Buse Frederic W.
Piercey Mark S.
Gartenberg Ehud
Ingersoll-Dresser Pump Co.
Kaman Electromagnetics Corp.
Palermo Robert F.
Thorpe Timothy S.
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