EP 0286954 B1 19921209 - SELF-PRIMING CENTRIFUGAL PUMP
Title (en)
SELF-PRIMING CENTRIFUGAL PUMP
Publication
Application
Priority
DE 3712916 A 19870416
Abstract (en)
[origin: US4844687A] The invention is directed to a selfpriming centrifugal pump having a symmetrical annular guide channel with a centrally mounted cover disc. A pair of guide ribs improve the loading of the impeller and increase the capacity for drawing air by suction. The guide rib pair is mounted in the annular guide channel. Each guide rib includes an injection rib and a separation rib. The ribs preferably have a width corresponding to the width of the annular guide channel and are arranged on a secant drawn through the circular peripheral band defined by the outer tips of the vanes of the impeller as the latter rotates.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
F04D 9/005 (2013.01 - EP); F04D 9/02 (2013.01 - US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0286954 A2 19881019; EP 0286954 A3 19890111; EP 0286954 B1 19921209; AT E83297 T1 19921215; DE 3712916 A1 19881103; DE 3712916 C2 19891130; DE 3876476 D1 19930121; ES 2037123 T3 19930616; IN 171114 B 19920725; JP S63277886 A 19881115; US 4844687 A 19890704
DOCDB simple family (application)
EP 88105434 A 19880406; AT 88105434 T 19880406; DE 3712916 A 19870416; DE 3876476 T 19880406; ES 88105434 T 19880406; IN 236MA1988 A 19880412; JP 9190088 A 19880415; US 18139688 A 19880414