Centrifugal pump improvements

Details Centrifugal pump improvements Centrifugal pump improvements

2006-10-24

2006-10-24

Verdier, Christopher (Department: 3745)

Rotary kinetic fluid motors or pumps

With cutter or comminutor for debris in working fluid

C415S169100, C415S206000, C241S046110, C241S089300

Reexamination Certificate

active

07125221

ABSTRACT:
An improved mechanism is provided for adjusting the clearance between the outer edges of impeller vanes of a centrifugal pump and the interior surface of an adjacent intake plate. The impeller having the vanes is mounted as an assembly to a back plate that can be secured to a casing or housing to which the intake plate is mounted. Threaded adjusters allow adjustment of the clearance between the impeller vanes and the intake plate. Additional modifications include a modified seal design to prevent material from clogging relatively rotatable seal components, a modified intake plate with a shallow recess to increase chopping effectiveness and pump efficiency, impeller vanes with a unique shape to achieve a high head, and a self-priming pump.

REFERENCES:
patent: 4052133 (1977-10-01), Yeater
patent: 5149248 (1992-09-01), Cramer
patent: 5256032 (1993-10-01), Dorsch
patent: 5810553 (1998-09-01), Pedersen
International Preliminary Examination Report, International Application No. PCT/US00/27778, Glenn Dorsch et al., filed Oct. 6, 2000.

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