Global Patent Index - EP 0979947 A2

EP 0979947 A2 2000-02-16 - Turbomolecular pump

Title (en)

Turbomolecular pump

Title (de)

Turbomolekularpumpe

Title (fr)

Pompe turbomoléculair

Publication

EP 0979947 A2 (EN)

Application

EP 99306359 A

Priority

JP 22792298 A

Abstract (en)

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)

Designated contracting state (EPC)

DE FR GB

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2005-08-31 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20050301

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

- Owner name: BOC EDWARDS JAPAN LIMITED

- Ref Legal Event Code: RAP1

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

- Owner name: SEIKO INSTRUMENTS INC.

- Ref Legal Event Code: RAP1

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

- Ref Legal Event Code: AKX

- Free Format Text: DE FR GB

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

- Ref Legal Event Code: 17P

- Effective date: 20010813

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

- Ref Legal Event Code: AK

- 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

- Ref Legal Event Code: AX

- Free Format Text: AL;LT;LV;MK;RO;SI

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

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB

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

- Ref Legal Event Code: AX

- Free Format Text: AL;LT;LV;MK;RO;SI