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(11)    Patent No :    AP 1951    (73) Applicant(s)       
(21)    Application No :    AP/P/2005/003360    WEIR SLURRY GROUP, INC, 2701 South Stoughton Road,       
            Madison, WI 53716,       
                   
(22)    Filing Date :    17.12.2003    United States of America       
(24)    Date of Grant &    06.02.2009           
                   
(45)    Publication :

(30)    Priority Data            (72) Inventors   
    (33) Country    (31) Number    (32) Date    ABARCA MELO Ricardo, Chile   
    US    10/335,584    31.12.2002    BOURGEOIS Ronald J, United States of America   
                   
                ROUDNEV Aleksander S., United States of America   
                et al       
                (74) Representative   
(84)    Designated State           
                   
    GH   T Z   ZM   ZW        HONEY & BLANCKENBERG   
                   
(51)    International    Classification    F04D 7/04 (2006.01)    F04D 29/42 (2006.01)   


(54)    Title

Centrifugal pump with configured volute

(57)    Abstract

A removable casing liner (10) in a centrifugal pump for processing heavy duty slurries containing abrasive particles has a selectively configured volute (60) which is asymmetrical in axial cross section along the circumference of the casing liner (10) from the cut water region to the throat region, the asymmetry being about a plane which radially bisects the casing (10) and volute (60) region. The liner (10) is particularly suitable for use in connection with an impellers (20) equipped with expelling vanes (50) for pumping out slurry from the seal face (62).


(56)    Documents Cited :    US 2 220 050 A    SU 1 247 582 C    WO 96/27085 A    SU 798 359 A

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