CENTRIFUGAL ELECTRIC PUMP AND MOTOR CASING FOR SUCH PUMP
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United States of America Patent
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Issued Date -
Aug 3, 2017
app pub date -
Jan 30, 2017
filing date -
Feb 2, 2016
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Abstract
A centrifugal electric pump includes a motor casing, containing in turn, an electric motor with a transmission shaft and a hydraulic part. The transmission shaft is connected to at least one impeller present disposed in the hydraulic part. The motor casing is provided internally with a housing in which the electric motor is accommodated. An external surface of the housing defines a cooling surface adapted to be flowed over by pumping liquid that arrives from the hydraulic part. The cooling surface is provided with a covering that is resistant to oxidation. The covering is constituted by a hydraulically isolating sheath, which is contoured to affect the cooling surface.
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