Sump pump

Details Sump pump Sump pump

1996-10-28

1998-01-13

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 63, 417420, 41742312, 366273, H02K 709

Patent

active

057083134

ABSTRACT:
A sealess sump pump comprises an impeller chamber mounted at the bottom of a pump column, an impeller journaled in the impeller chamber, a rare earth driven magnet assembly fixed to rotate with the impeller, a rare earth driving magnet assembly mounted at the lower end of an elongate pump shaft and a nonmagnetic barrier between the driving and the driven magnet assemblies.

REFERENCES:
patent: 1385400 (1921-07-01), Scheibe
patent: 4036565 (1977-07-01), Becker
patent: 4106825 (1978-08-01), Ruyak
patent: 5017102 (1991-05-01), Shimaguchi et al.
patent: 5160246 (1992-11-01), Horiuchi
patent: 5300849 (1994-04-01), Elsasser
patent: 5464333 (1995-11-01), Okada et al.
patent: 5470152 (1995-11-01), Rains
patent: 5533803 (1996-07-01), Meier

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