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Current content: 157 484 516 patent documents

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147 225 new documents added

921 612 documents amended

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EP 0449861 B1 19930519 - CENTRIFUGAL PUMP IMPELLER WITH LOW SPECIFIC SPEED

Title (en)

CENTRIFUGAL PUMP IMPELLER WITH LOW SPECIFIC SPEED

Publication

EP 0449861 B1 19930519 (DE)

Application

EP 90900104 A 19891212

Priority

DE 3843428 A 19881223

Abstract (en)

[origin: WO9007650A1] A centrifugal pump impeller has blade channels (5) with a slot-shaped opening (6) in the impeller cover disks (3, 7) and in the region of the impeller outer diameter.

IPC 1-7

F04D 29/22

IPC 8 full level

F04D 29/22 (2006.01)

CPC (source: EP US)

F04D 29/2222 (2013.01 - EP US); F04D 29/2255 (2013.01 - EP US)

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI LU NL SE

DOCDB simple family (publication)

WO 9007650 A1 19900712; DE 3843428 A1 19900705; DE 3843428 C2 19931209; DE 58904451 D1 19930624; EP 0449861 A1 19911009; EP 0449861 B1 19930519; US 5257910 A 19931102

DOCDB simple family (application)

EP 8901522 W 19891212; DE 3843428 A 19881223; DE 58904451 T 19891212; EP 90900104 A 19891212; US 69104991 A 19910620