Centrifugal sewage pumps with two impellers

Details Centrifugal sewage pumps with two impellers Centrifugal sewage pumps with two impellers

2005-07-12

2005-07-12

Nguyen, Hoang (Department: 3748)

Rotary kinetic fluid motors or pumps

With cutter or comminutor for debris in working fluid

C241S046110

Reexamination Certificate

active

06916152

ABSTRACT:
A centrifugal sewage pump with two impellers includes a motor, a first impeller housing, a second impeller housing and a transfer tube. The first impeller housing is attached on one end of the motor and the second impeller housing is attached to the other end of the motor. A first impeller is attached to one end of a motor shaft of the motor and a second impeller is attached to the other motor shaft. Sewage is drawn into the first impeller chamber and pushed into the transfer tube with the first impeller. Sewage from the transfer tube enters the second impeller chamber through a transfer cavity and is pushed out with the second impeller. In a second embodiment, a grinder wheel and shredder ring are added to an inlet of the first impeller housing. A discharge head height is nearly twice that of a single impeller pump.

REFERENCES:
patent: 3558012 (1971-01-01), Weis
patent: 3873244 (1975-03-01), Jaggi
patent: 4378093 (1983-03-01), Keener
patent: 6010086 (2000-01-01), Earle, III et al.

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