EP 0664398 A1 19950726 - Centrifugal pump with backflow prevention valve.
Title (en)
Centrifugal pump with backflow prevention valve.
Title (de)
Kreiselpumpe mit den Rückfluss verhinderndem Ventil.
Title (fr)
Pompe centrifuge avec clapet de non-retour.
Publication
Application
Priority
DE 4401658 A 19940121
Abstract (en)
The pump has the delivery medium emerging from the last stage is pressed into a ring space (13) surrounding the stages, from which it flows to the outlet. The back flow valve (10-12) is arranged abutting the ring space. It is arranged in the flow direction behind the pump, partic. behind the last pump stage, and near the bearing and/or the shaft seal (5) which is turned away from the pump suction and pressure connections (6, 7). The back flow valve surrounds a chamber (9) with a ring membrane (12), into which the pump and partic. the last pump stage delivers. The support surface for the ring membrane is formed by an externally conically formed support part (10) with through flow apertures (11) located inside the ring membrane.
Abstract (de)
Die Erfindung betrifft eine Kreiselpumpe, insbesondere mehrstufige Inlinepumpe mit die Laufradwelle tragenden Lagern 4, bzw. Dichtungen 5 und mit einem den Rückfluß verhindernden Ventil 10-12, wobei das aus der letzten Stufe austretende Fördermedium in einen die Stufe(n) umgebenden Ringraum 13 gedrückt wird, von dem es zum Auslaß hin strömt, wobei das Rückflußventil 10-12 im Ringraum insbesondere angrenzend an den Ringraum angeordnet ist. <IMAGE>
IPC 1-7
IPC 8 full level
F04D 1/06 (2006.01); F04D 15/00 (2006.01)
CPC (source: EP)
F04D 1/066 (2013.01); F04D 15/0083 (2013.01)
Citation (search report)
- [DA] US 5201633 A 19930413 - PEU JEAN C [FR]
- [A] DE 8612405 U1 19860731
- [A] FR 2105910 A5 19720428 - WORTHINGTON CORP
- [A] GB 1066594 A 19670426 - POMORSKA ODLEWNIA I EMALIERNIA
- [A] DE 9310091 U1 19930923 - HARTLAGE GMBH & CO KG J [DE]
- [A] US 4244675 A 19810113 - BOWER JOHN R
- [A] DE 3729673 A1 19890323 - GRUNDFOS INT [DK]
- [A] EP 0360697 A1 19900328 - OLAER IND SA [FR]
- [A] WO 8604399 A1 19860731 - ANDREN CHRISTOPHER ERIK
- [A] US 4565214 A 19860121 - PARMAN OSCAR D [US]
Designated contracting state (EPC)
BE DE ES FR GB IT
DOCDB simple family (publication)
EP 0664398 A1 19950726; EP 0664398 B1 19980722; DE 4401658 A1 19950727; DE 59502855 D1 19980827; ES 2119237 T3 19981001
DOCDB simple family (application)
EP 95100590 A 19950118; DE 4401658 A 19940121; DE 59502855 T 19950118; ES 95100590 T 19950118