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Patent Searching and Data


Title:
CENTRIFUGAL PUMP IMPROVEMENTS
Document Type and Number:
WIPO Patent Application WO2001025640
Kind Code:
A3
Abstract:
An improved mechanism is provided for adjusting the clearance between the outer edges of impeller vanes (10) of a centrifugal pump and the interior surface of an adjacent intake plate (13). The impeller (7) having the vanes (10) is mounted as an assembly to a back plate (104) that can be secured to a casing (5) or housing (76) to which the intake plate (13) is mounted. Threaded adjusters (112, 122) allow adjustment of the clearance between the impeller vanes (10) and the intake plate (13). 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.

Inventors:
DORSCH GLENN R (US)
KEERAN KENT H (US)
SWENSON ARNE E (US)
Application Number:
PCT/US2000/027778
Publication Date:
September 13, 2001
Filing Date:
October 06, 2000
Export Citation:
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Assignee:
VAUGHAN CO (US)
DORSCH GLENN R (US)
KEERAN KENT H (US)
SWENSON ARNE E (US)
International Classes:
F04D7/04; F04D29/12; F04D29/16; F04D29/62; (IPC1-7): F04D7/06; F04D29/62; F04D29/70; F04D29/08
Foreign References:
US4052133A1977-10-04
US5810553A1998-09-22
US5256032A1993-10-26
US5149248A1992-09-22
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