Pump with air purging and self-cleaning features

Details Pump with air purging and self-cleaning features Pump with air purging and self-cleaning features

1998-01-22

2000-05-09

Moulis, Thomas N.

Pumps

Condition responsive control of pump drive motor

Responsive to accumulation of pumped liquid in receiver

417 53, 415 561, F04B 4900, F03B 1104

Patent

active

060595353

ABSTRACT:
A pump installation used to maintain liquid level in a tank by pumping down liquid introduced into the tank with rotation of an impeller about a vertical axis features an air purging flow defined by axial openings through the pump impeller and an annular clearance space between the impeller drive and the pump housing cover, the space disposed above the impeller axial openings. A support sleeve surrounding the impeller drive and secured to the pump motor and tank top has openings at the bottom thereof which sets up a flushing liquid flow to eliminate solids forced up through the clearance space and into the sleeve interior.

REFERENCES:
patent: 4936759 (1990-06-01), Clausen et al.
patent: 5160459 (1992-11-01), Guarnaschelli et al.
patent: 5509779 (1996-04-01), Mori et al.
patent: 5676520 (1997-10-01), Thut
patent: 5842832 (1998-12-01), Thut

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