EP 0002157 B1 19801029 - PUMP
Title (en)
PUMP
Publication
Application
Priority
FR 7735036 A 19771122
Abstract (en)
[origin: US4242039A] The present invention relates to internal and shaft outlet seals of a pump. On both sides of a paddle-wheel are arranged a pair of coaxial discs (22-23) and (24-25), the face of one disc being smooth and the face of the other disc having spiral grooves, one of the discs of each pair being interlocked in rotation with wheel 5, whereby the liquid between two discs is subjected to a pressure increase radially outwardly compensating at least for the pressure increase due to pumping by wheel 5.
IPC 1-7
IPC 8 full level
F04D 29/16 (2006.01); F04D 29/22 (2006.01); F04D 29/46 (2006.01)
CPC (source: EP US)
F04D 29/167 (2013.01 - EP US); F04D 29/2266 (2013.01 - EP US)
Designated contracting state (EPC)
BE CH DE FR GB LU NL SE
DOCDB simple family (publication)
EP 0002157 A1 19790530; EP 0002157 B1 19801029; DE 2860265 D1 19810129; FR 2409406 A1 19790615; IT 1100276 B 19850928; IT 7829714 A0 19781113; JP S5478509 A 19790622; US 4242039 A 19801230
DOCDB simple family (application)
EP 78400182 A 19781115; DE 2860265 T 19781115; FR 7735036 A 19771122; IT 2971478 A 19781113; JP 14124378 A 19781117; US 96203278 A 19781115