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(11)    Patent No :    AP 2061   
(21)    Application No :    AP/P/2005/003269   
(22)    Filing Date :    07.02.2005   
(24)    Date of Grant &    27.10.2009   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
ZA    2004/1150    12.02.2004
ZA    2004/1149    12.02.2004
ZA    2004/1151    12.02.2004

(84)    Designated State

BW    GH   NA   TZ   ZM   ZW


(73) Applicant(s)

WEIR MINERALS AFRICA (PROPRIETARY) LIMITED, 31

Isando Road, Isando, Gauteng,
South Africa


(72) Inventors

GELDENHUYS Siegfried, South Africa

(74) Representative

HONEY & BLANCKENBERG
 


(51)  International  Classification   F04D 29/16 (2006.01)    F04D 29/42 (2006.01)



(54)    Title

Rotary pump

(57)    Abstract

A rotary pump 10, e.g. a centrifugal slurry pump, has a main casing 12 housing an impeller 18 rotatable in an impeller cavity 16 defined between end liners 25, 28 and a peripheral main casing portion 24. The end liner 28, at a suction end of the impelle r, is slidingly sealed via an annular seal 32 against the main casing portion 24. A radially inner, axially outwardly extending tubular portion 36 integral with the end liner 28 is aligned with a stationary tubular inlet portion 40. Seats 38, 44 respectively on the tubular portions 36, 40 oppose each other over a bridge cavity accommodating an annular bridge 50 which is expansible to allow the end liner 28 to be adjusted axially to close any gap with the impeller 18 caused by wear. Two variations of the annular bridge 50 are disclosed.


(56)  Documents Cited :    US 5 941 536 A

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