Multistage pump

Details Multistage pump Multistage pump

2007-11-06

2007-11-06

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Plural rigidly related blade sets

Reexamination Certificate

active

11138124

ABSTRACT:
A centrifugal pump includes plural pump stages, each comprising an impeller assembly, a stationary disc assembly and a diffuser assembly, all disposed about an impeller shaft. A floating impeller hub seal is supported by a diffuser assembly to minimize fluid recirculation. A thrust washer is disposed around the impeller shaft and is engageable with an impeller hub and the hub seal. A wear ring is secured to a disc assembly and engageable with a wear surface on the impeller.

REFERENCES:
patent: 2429978 (1947-11-01), Blanchard
patent: 5133639 (1992-07-01), Gay et al.
patent: 6106224 (2000-08-01), Sheth et al.
patent: 6899517 (2005-05-01), Gay et al.

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