EP 0672832 A1 19950920 - Sealing device for pump impeller.
Title (en)
Sealing device for pump impeller.
Title (de)
Dichtungsvorrichtung für Pumpenlaufrad.
Title (fr)
Dispositif d'étanchéité pour rouet de pompe.
Publication
Application
Priority
SE 9400881 A 19940316
Abstract (en)
The invention concerns a device for sealing off the slot between a pump impeller and a pump housing in a centrifugal pump. The inlet part (2) of the pump housing (1) is designed with a collar (2) which concentrically surrounds a corresponding opposite collar formed part (5) of the pump impeller inlet, thus linking any possible leakage flow in parallel with the main flow into the impeller and minimizing the disturbance in the main flow. In order to minimize the leakage flow an O-ring (7) is arranged in front of the opening to the slot (8) between the parts (2) and (5). <IMAGE>
IPC 1-7
IPC 8 full level
F04D 29/08 (2006.01); F04D 29/16 (2006.01)
CPC (source: EP)
F04D 29/167 (2013.01)
Citation (applicant)
- EP 0492603 A2 19920701 - EBARA CORP [JP]
- US 3228343 A 19660111 - ANTON PAUL J, et al
- US 3221661 A 19651207 - SWEARINGEN JUDSON S
Citation (search report)
- [X] US 3741679 A 19730626 - JOHNSTON D
- [A] US 5129795 A 19920714 - HYLAND GEORGE J [US]
- [A] EP 0167837 A1 19860115 - LOWARA SPA [IT]
- [A] SOVIET PATENTS ABSTRACTS Section PQ Week 3488, 5 October 1988 Derwent World Patents Index; Class Q56, AN 88240896
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0672832 A1 19950920; EP 0672832 B1 19980520; CA 2144692 A1 19950917; CA 2144692 C 20000307; DE 69502525 D1 19980625; DE 69502525 T2 19980917; JP H08121384 A 19960514; SE 502552 C2 19951113; SE 9400881 D0 19940316; SE 9400881 L 19950917
DOCDB simple family (application)
EP 95850055 A 19950313; CA 2144692 A 19950315; DE 69502525 T 19950313; JP 5592495 A 19950315; SE 9400881 A 19940316