Global Patent Index - EP 1055071 A1

EP 1055071 A1 2000-11-29 - CONTROL DEVICE FOR A MEMBRANE PUMP

Title (en)

CONTROL DEVICE FOR A MEMBRANE PUMP

Title (de)

REGELVORRICHTUNG FÜR EINE MEMBRANPUMPE

Title (fr)

DISPOSITIF DE REGLAGE D'UNE POMPE A MEMBRANE

Publication

EP 1055071 A1 (DE)

Application

EP 99950623 A

Priority

  • DE 29821910 U
  • EP 9907399 W

Abstract (en)

[origin: US6344722B1] A control device for a diaphragm pump to feed a filter press or similar user unit comprising a three-phase electric driving motor for the pump which is connected to a supply main via a variable-frequency converter, which frequency converter has an analogue output at which a signal will appear which corresponds to the respective motor torque, a standard r.p.m. set-point adjuster to the input of which the actual signal is provided via an inverter and in which a graph is stored which produces an interdependences between the motor torque and the speed such that if the actual-signal rates are small the graph for the speed runs along a constant maximum value and if a preset rate is reached for the actual signal it gradually declines to a minimum value, and an attenuation member for the actual signal.

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

F04B 49/06; H02P 7/628

IPC 8 full level (invention and additional information)

F04B 43/02 (2006.01); F04B 49/06 (2006.01)

CPC (invention and additional information)

F04B 49/065 (2013.01); F04B 2203/0207 (2013.01); F04B 2207/044 (2013.01)

Citation (search report)

See references of WO 0034659A1

Designated contracting state (EPC)

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

EPO simple patent family

DE 29821910 U1 19990204; EP 1055071 A1 20001129; EP 1055071 B1 20040915; ES 2226450 T3 20050316; JP 2002531774 A 20020924; US 6344722 B1 20020205; WO 0034659 A1 20000615

INPADOC legal status


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2005-09-07 [26N] NO OPPOSITION FILED

- Effective date: 20050616

2005-08-05 [ET] FR: TRANSLATION FILED

2005-04-20 [REG IE FD4D] EUROPEAN PATENTS DESIGNATING IRELAND TREATED AS ALWAYS HAVING BEEN VOID

2005-03-16 [REG ES FG2A] DEFINITIVE PROTECTION

- Document: ES 2226450 T3

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- Effective date: 20041117

2004-10-21 [REF] CORRESPONDS TO:

- Document: DE 59910519 P 20041021

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2003-11-19 [17Q] FIRST EXAMINATION REPORT

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