Global Patent Index - EP 0864755 A3

EP 0864755 A3 2000-11-29 - Double pump with sequential or synchronous operation

Title (en)

Double pump with sequential or synchronous operation

Title (de)

Doppelpumpe mit Einzel- und Synchronbetrieb

Title (fr)

Double pompe à fonctionnement séquentiel ou synchrone

Publication

EP 0864755 A3 (DE)

Application

EP 98104145 A

Priority

DE 19710675 A

Abstract (en)

[origin: EP0864755A2] The twin pump assembly, with a control switch action between the first pump for small volume flows and a second pump for larger volume flows, sets the rotary speed of the first pump at a continuous increase until the pumped flow Q* reaches a given level when the second pump is switched into use. The control returns the first pump into service, when the pumped flow drops to the set level Q*. With a pumped flow of Q ≥ Q*, both pumps are operated at the same rotary speed.

IPC 1-7 (main, further and additional classification)

F04D 15/00; F04D 15/02

IPC 8 full level (invention and additional information)

F04D 15/00 (2006.01); F04D 15/02 (2006.01)

CPC (invention and additional information)

F04D 15/00 (2013.01); F04D 15/029 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

EP 0864755 A2 19980916; EP 0864755 A3 20001129; EP 0864755 B1 20030813; EP 0864755 B2 20110316; DE 19710675 A1 19980917; DE 19710675 B4 20120112; DE 19710675 B8 20120329