Patent ID: 6175173
Filing Date: 2001-01-16
Classification: F04D,H02K

Abstract:
A centrifugal pump comprising:an elongated tubular pump housing formed with an intake fitting at one axial end and a discharge fitting at an opposite axial end;a pump impeller rotatable in said housing about an axis thereof for drawing a liquid in through said intake fitting, passing said liquid axially through said housing and discharging the liquid through said discharge fitting;an axially elongated electric motor wholly received in said housing between said intake fitting and said discharge fitting and flushed around by the liquid flowing between said intake fitting and said discharge fitting, said motor having a rotor rotatable about said axis and operatively connected to said impeller, a stator surrounding said rotor and provided with at least one winding, and a motor casing receiving said stator and spaced inwardly of said housing, whereby said liquid passes between said casing and said housing;an electronic control unit for controlling said motor, wholly received in said housing and flushed around by said liquid;a plurality of angularly spaced support ribs between said housing and said casing for supporting said casing in said housings anda single annular seal between said electronic control unit and said casing and sealing said casing against an interior of said housing.