Global Patent Index - EP 0979947 A3

EP 0979947 A3 2001-03-28 - Turbomolecular pump

Title (en)

Turbomolecular pump

Title (de)

Turbomolekularpumpe

Title (fr)

Pompe turbomoléculair

Publication

EP 0979947 A3 (EN)

Application

EP 99306359 A

Priority

JP 22792298 A

Abstract (en)

[origin: EP0979947A2] A turbomolecular pump is provided in which the structure of a stator blade (20) is improved for cooling rotor blades (2), thereby achieving a higher thermal conduction efficiency. The arrangement provides contact surfaces of the stator blades (20) and stator blade spacers (22) to be engaged/crushed upon assembling the pump. <IMAGE> <IMAGE>

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

F04D 19/04; F04D 29/58

IPC 8 full level (invention and additional information)

F04D 29/00 (2006.01); F04D 19/04 (2006.01); F04D 29/58 (2006.01)

CPC (invention and additional information)

F04D 29/5853 (2013.01); F04D 19/042 (2013.01)

Citation (search report)

  • [A] US 4695223 A 19870922 - CASPAR HANS-PETER [DE], et al
  • [X] PATENT ABSTRACTS OF JAPAN vol. 017, no. 168 (M - 1391) 31 March 1993 (1993-03-31)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 012, no. 347 (M - 743) 19 September 1988 (1988-09-19)

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

EP 0979947 A2 20000216; EP 0979947 A3 20010328; JP 2000064986 A 20000303; KR 20000017282 A 20000325

INPADOC legal status


2005-08-31 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20050301

2004-09-01 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: BOC EDWARDS JAPAN LIMITED

2002-05-08 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: SEIKO INSTRUMENTS INC.

2001-12-19 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: DE FR GB

2001-10-10 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010813

2001-03-28 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-03-28 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI

2000-02-16 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): DE FR GB

2000-02-16 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI