Global Patent Index - EP 0824981 B1

EP 0824981 B1 2001-05-02 - Process for manufacturing a hollow turbine blade and device used for on-going hot twisting

Title (en)

Process for manufacturing a hollow turbine blade and device used for on-going hot twisting

Title (de)

Verfahren zur Herstellung einer hohlen Turbinschaufel und Anlage zum laufenden Warmverwinden

Title (fr)

Procédé de fabrication d'une aube creuse de turbomachine et équipement de vrillage évolutif à chaud utilisé

Publication

EP 0824981 B1 (FR)

Application

EP 97401954 A

Priority

FR 9610352 A

Abstract (en)

[origin: EP0824981A1] The procedure consists of forging, machining and welding components made by a computer-aided system, followed by inflation under pressure and superplastic moulding. The required twist in the blade, made from a titanium alloy such as TA6V, is produced by heating the blade to 700 deg C and applying a torsion to it through rotary bars (5) acting on yokes previously attached to the blade. The twisting process can be applied to the individual components of the blade or to assembled blades and uses a cylindrical electric furnace (2) with slits (24) for the bars. The furnace is surrounded by a circular frame (6), and jaws (3, 4) hold the two ends of the blade while it is being twisted.

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

B21D 53/78; B21D 11/14

IPC 8 full level (invention and additional information)

F01D 5/18 (2006.01); B21D 11/14 (2006.01); B21D 53/78 (2006.01); C22F 1/00 (2006.01); C22F 1/18 (2006.01); F01D 5/28 (2006.01); F02C 7/00 (2006.01)

CPC (invention and additional information)

B21D 53/78 (2013.01); B21D 11/14 (2013.01); Y10T 29/49336 (2013.01); Y10T 29/49339 (2013.01)

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

EP 0824981 A1 19980225; EP 0824981 B1 20010502; DE 69704690 D1 20010607; DE 69704690 T2 20011129; FR 2752539 A1 19980227; FR 2752539 B1 19980918; JP 3477043 B2 20031210; JP H1089008 A 19980407; US 5933952 A 19990810; US 6242715 B1 20010605

INPADOC legal status


2018-02-02 [REG FR CD] CHANGE OF NAME OR COMPANY NAME

- Owner name: SAFRAN AIRCRAFT ENGINES, FR

- Effective date: 20170719

2017-08-31 [PG25 IT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: IT

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20160820

2017-07-31 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: DE

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20170301

2017-07-31 [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 NON-PAYMENT OF DUE FEES

- Effective date: 20160820

2017-04-26 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20160820

2017-03-01 [REG DE R119] APPLICATION DEEMED WITHDRAWN, OR IP RIGHT LAPSED, DUE TO NON-PAYMENT OF RENEWAL FEE

- Document: DE 69704690

2016-11-30 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: FR

- Payment date: 20160804

- Year of fee payment: 20

2016-08-04 [REG FR PLFP] FEE PAYMENT

- Year of fee payment: 20

2015-12-31 [PGFP IT] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: IT

- Payment date: 20150728

- Year of fee payment: 19

2015-10-30 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: GB

- Payment date: 20150724

- Year of fee payment: 19

2015-10-30 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Payment date: 20150722

- Year of fee payment: 19

2006-02-10 [REG FR CD] CHANGE OF NAME OR COMPANY NAME

2002-04-24 [26N] NO OPPOSITION FILED

2002-01-25 [REG FR CD] CHANGE OF NAME OR COMPANY NAME

2002-01-25 [REG FR TP] TRANSMISSION OF PROPERTY

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

2001-06-14 [ITF] IT: TRANSLATION FOR A EP PATENT FILED

- Owner name: BARZANO' E ZANARDO MILANO S.P.A.

2001-06-07 [REF] CORRESPONDS TO:

- Document: DE 69704690 20010607

2001-05-30 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Effective date: 20010503

2001-05-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR GB IT

2000-08-23 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: SNECMA MOTEURS

2000-08-23 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: ETABLISSEMENTS ROBERT CREUZET

2000-07-19 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20000605

1998-11-04 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: DE FR GB IT

1998-11-04 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

- Designated State(s): DE FR GB IT

1998-02-25 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19970901

1998-02-25 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT