Global Patent Index - EP 0855516 B1

EP 0855516 B1 2003-06-25 - Wet rotor submersible motor for driving a centrifugal pump

Title (en)

Wet rotor submersible motor for driving a centrifugal pump

Title (de)

Nasslaufender Tauchmotor zum Antreiben einer Kreiselpumpe

Title (fr)

Moteur submersible à rotor immergé pour entraîner une pompe centrifuge

Publication

EP 0855516 B1 (DE)

Application

EP 98100960 A

Priority

DE 19702723 A

Abstract (en)

[origin: EP0855516A1] The motor (1) has a shaft (6) carrying a seal unit (12) and a rotor (5). The pump-sided hollow shaft end contains a functional unit (22), which is fluid-permeable at least in pump direction. The rotor chamber (13) of the motor is automatically filled with fluid via the seal unit. When the motor is working, the functional unit permits fluid to flow from the rotor chamber to the pump, for ventilation of the rotor chamber and reduction of excess pressure in the rotor chamber relative to the fluid pressure in the pump area. The functional unit consists of a valve (23), fitted into the shaft end, with spring-loaded valve body.

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

F04D 13/06

IPC 8 full level (invention and additional information)

F04D 13/06 (2006.01)

CPC (invention and additional information)

F04D 13/062 (2013.01)

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

EP 0855516 A1 19980729; EP 0855516 B1 20030625; DE 19702723 A1 19980806; US 6140725 A 20001031

INPADOC legal status


2018-04-30 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2018-01-21 [REG DE R071] EXPIRY OF RIGHT

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2004-06-16 [26N] NO OPPOSITION FILED

- Effective date: 20040326

2004-05-07 [ET] FR: TRANSLATION FILED

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2003-07-31 [REF] CORRESPONDS TO:

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2003-06-25 [AK] DESIGNATED CONTRACTING STATES:

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2003-06-25 [REG GB FG4D] EUROPEAN PATENT GRANTED

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1999-04-14 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

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