Global Patent Index - EP 0752066 B1

EP 0752066 B1 2000-03-01 - DEVICE FOR REDUCING NOISE IN CENTRIFUGAL PUMPS

Title (en)

DEVICE FOR REDUCING NOISE IN CENTRIFUGAL PUMPS

Title (de)

EINRICHTUNG ZUR GERÄUSCHREDUZIERUNG BEI KREISELPUMPEN

Title (fr)

DISPOSITIF POUR REDUIRE LE BRUIT DE POMPES CENTRIFUGES

Publication

EP 0752066 B1 (DE)

Application

EP 95913122 A

Priority

  • DE 4409475 A
  • EP 9500963 W

Abstract (en)

[origin: DE19509255A1] The rotary pump has at least one impeller with flow profiled surfaces at the supply channels. One flow edge (12) of the supply line (1) is aligned by angle to the rotation axis (13) of the impeller, such that when the impeller blade passes this surface there is a point of overlap between blade and flow surface. The length of an acutely angled flow surface is greater than the width of the flow line. The endpoints of the flow surfaces are displaced between 0.1 to 1.2 times the distance of an impeller blade pitch.

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

F04D 29/66; F04D 29/42; F04D 29/44

IPC 8 full level (invention and additional information)

F04D 29/42 (2006.01); F04D 29/44 (2006.01); F04D 29/66 (2006.01)

CPC (invention and additional information)

F04D 29/428 (2013.01); F04D 29/448 (2013.01); F04D 29/669 (2013.01)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

DE 19509255 A1 19950921; EP 0752066 A1 19970108; EP 0752066 B1 20000301; JP H09510527 A 19971021; US 6017187 A 20000125; WO 9525895 A1 19950928

INPADOC legal status


2015-05-29 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Free text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

- Effective date: 20150314

2015-04-08 [REG GB PE20] PATENT EXPIRED AFTER TERMINATION OF 20 YEARS

- Expiry date: 20150314

2015-03-17 [REG DE R071] EXPIRY OF RIGHT

- Document: DE 59507918

2015-03-15 [REG DE R071] EXPIRY OF RIGHT

- Document: DE 59507918

2014-11-28 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: FR

- Payment date: 20140410

- Year of fee payment: 20

2014-06-30 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: GB

- Payment date: 20140320

- Year of fee payment: 20

2014-04-30 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Payment date: 20140311

- Year of fee payment: 20

2002-01-01 [REG GB IF02] EUROPEAN PATENT IN FORCE AS OF 2002-01-01

2001-02-14 [26N] NO OPPOSITION FILED

2000-06-16 [ET] FR: TRANSLATION FILED

2000-05-24 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Effective date: 20000502

2000-04-06 [REF] CORRESPONDS TO:

- Document: DE 59507918 20000406

2000-03-01 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR GB

1997-12-17 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19971104

1997-01-08 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19960907

1997-01-08 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB