Drainage pump

Details Drainage pump Drainage pump

1996-05-22

1997-02-25

Larson, James

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Plural rigidly related blade sets

416175, 416182, 416189, 416201A, F04D 100

Patent

active

056054394

ABSTRACT:
A drainage pump 1 comprises a pump housing 40 defining a suction inlet 42, a pumping chamber 44 and a delivery outlet 46, and a cover 32. An impeller 50 accommodated in the pump housing is driven by a motor 10. The impeller 50 comprises a shaft 52 coupled to an output shaft of the motor 10, large-radius vanes 60 in form of flat plates radially extending from the shaft 52, and small-radius vanes 54 continuous from the large-radius vanes 60. Outer circumferential edges of the large-radius vanes 60 are connected by a cylindrical wall member 64, and outer circumferential parts of lower edges of the large-radius vanes 60 are connected by an annular member 62. The cylindrical wall member 64 has a rounded portion 70 at its upper end, and the small-radius vanes 54 also have rounded portions 57 at their lower ends.

REFERENCES:
patent: 3110748 (1963-11-01), Myklebust
patent: 5209641 (1993-05-01), Hoglund et al.

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