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US 5,332,374 AGranted
Axially coupled flat magnetic pump
OwnerRalph Kricker, Sheldon Childsinventors
Life of this patent
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Abstract
An axially coupled magnetic pump having a housing of minimum motor length, including an eddy-free seal sheet interposed between the rotor and stator, and sealing the pump housing outwardly of the rotor. A rotor magnet configuration in conjunction with specific sensor positioning to effect close driving control over the pump.
Claims11
An axially coupled flat magnetic pump comprising,
- a pump housing having a fixed stub shaft projecting thereinto centrally thereof,
- a pump rotor mounted in said housing on said stub shaft and including an impeller having axial and centrifugal flow channels on one side of said rotor,
- said rotor including a circumferential series of magnets on the other side thereof,
- a seal plate extending between the periphery of said housing and said stub shaft adjacent said rotor to preclude leakage of fluid outwardly of said housing axially past said rotor,
- a stator having a series of energizable stator coil magnet windings in circumferential array adjacent said seal plate to effect rotation of said rotor and impeller upon energization thereof,
- a cup-like cover plate receiving and peripherally enclosing said stator magnet windings,
- means detachably securing said cover plate to said housing,
- a magnetic sensor disposed in axial proximity to said rotor magnets, and,
- means for positioning said sensor adjacent said stator, said means including an annulus disposed about said stub shaft carrying said sensor on the axially inward face thereof.
6 more elements
An axially coupled flat magnetic pump comprising,
- a pump housing having a fixed stub shaft projecting thereinto centrally thereof,
- a pump rotor mounted in said housing on said stub shaft and including an impeller having axial and centrifugal flow channels on one side of said rotor,
- said rotor including a circumferential series of magnets on the other side thereof,
- a seal plate extending between the periphery of said housing and said stub shaft adjacent said rotor to preclude leakage of fluid outwardly of said housing axially past said rotor,
- a stator having a series of energizable stator coil magnet windings in circumferential array adjacent said seal plate to effect rotation of said rotor and impeller upon energization thereof,
- a cup-like cover plate receiving and peripherally enclosing said stator magnet windings,
- means detachably securing said cover plate to said housing,
- a magnetic sensor disposed in axial proximity to said rotor magnets, wherein said rotor magnets are of fan-shaped configuration and include radially inwardly extending tips for actuation of said sensor.
5 more elements
Dependencies are inferred from the claim text.