Global Patent Index - EP 1164296 A2

EP 1164296 A2 2001-12-19 - Multistage pump

Title (en)

Multistage pump

Title (de)

Mehrstufige Pumpe

Title (fr)

Pompe multiétagée

Publication

EP 1164296 A2 (EN)

Application

EP 01113613 A

Priority

IT PD20000163 A

Abstract (en)

A multistage pump (10) comprising, in a tubular body (11), a plurality of diffusers (12) which are alternated with impellers (13), the diffusers (12) being stacked peripherally so as to form a diffuser casing (14), the impellers (13) being keyed on a shaft (15) arranged on the axis (16), a closure assembly (18) being associated with the tubular body (11) at the intake region (17) so as to lock the diffusers in the packed configuration. The pump (10) comprises two annular elements (22, 23) which are interposed between the closure assembly (18) associated with the tubular body (11) and the corresponding head (21) of the diffuser casing (14), the mutually facing surfaces of the annular elements being shaped so as to form a contact with three degrees of freedom of rotation so as to allow adaptation with correction of any errors of co-planarity in the locking on the part of the closure assembly (18) on the head (21) of the diffuser casing (14). <IMAGE>

IPC 1-7 (main, further and additional classification)

F04D 29/42; F04D 1/06

IPC 8 full level (invention and additional information)

F04D 1/06 (2006.01); F04D 29/42 (2006.01)

CPC (invention and additional information)

F04D 29/426 (2013.01); F04D 1/063 (2013.01); F04D 29/4266 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

EP 1164296 A2 20011219; EP 1164296 A3 20030319; IT 1315710 B1 20030318; IT PD20000163 A1 20011217; IT PD20000163 D0 20000615

INPADOC legal status


2003-08-20 [18W] APPLICATION WITHDRAWN

- Effective date: 20030624

2003-03-19 [AK] DESIGNATED CONTRACTING STATES:

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2003-03-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2003-03-19 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL LT LV MK RO SI

2001-12-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2001-12-19 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI