Global Patent Index - EP 1510696 A1

EP 1510696 A1 20050302 - A self-priming centrifugal pump

Title (en)

A self-priming centrifugal pump

Title (de)

Selbstansaugende Kreiselpumpe

Title (fr)

Pompe centrifuge auto-amorçante

Publication

EP 1510696 A1 20050302 (EN)

Application

EP 03425564 A 20030829

Priority

EP 03425564 A 20030829

Abstract (en)

A self-priming centrifugal pump comprising a pump body (2), a motorised impeller (8) mounted internally to the pump body (2) and a diffuser (13) positioned downstream of the impeller (8), with reference to the direction of flow of a liquid in the pump (1). The diffuser (13) has a first and a second wall (14), (15) defining between them an annular diffusion chamber (16). The diffusion chamber (16) has a first segment (18) and a second segment (19), the one being the continuation of the other, the first segment (18) corresponding, in use, to an upper portion of the diffusion chamber (16). The first wall (14) has a plurality of openings (17) positioned along its own outer circumferential periphery to allow the entry of the flow of liquid exiting the impeller (8) into the diffusion chamber (16), whilst the second wall (15) is substantially closed in correspondence with the first segment (18), and it has at least a through hole (20) in correspondence with the second segment (19), to put in communication the second segment (19) of the diffusion chamber (16) with the delivery chamber (5). <IMAGE>

IPC 1-7

F04D 9/06

IPC 8 full level

F04D 9/06 (2006.01)

CPC (source: EP)

F04D 9/06 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

DOCDB simple family (publication)

EP 1510696 A1 20050302; EP 1510696 B1 20060301; AT E319012 T1 20060315; DE 60303788 D1 20060427; DE 60303788 T2 20061005; ES 2258712 T3 20060901

DOCDB simple family (application)

EP 03425564 A 20030829; AT 03425564 T 20030829; DE 60303788 T 20030829; ES 03425564 T 20030829