EP0874136A3
Frangible fan blade
Abstract
The present invention relates to a fan blade (34) in an axial gas turbine engine. The blade platform (46) is constructed to fracture adjacent the airfoil portion (48) of the blade so as to locate the fractured edge of the platform in the root portion (44). As a result of this benign platform, damage to successive fan blades during a blade loss condition is reduced. In addition, various construction details are developed in the airfoil and root portion of the fan blade to reduce damage to fan blades during impact with adjacent blades.
Term
Term ended
Projected expiry passed 24 April 2018, 8.4 years ago.
- Priority
- Filed
- Published
- Projected expiry
- Today
1 sheet
Sheet 1
Every citation, both ways
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| US4120607A | Cites | United States of America | A | Search report | 1 |
| US4453890A | Cites | United States of America | A | Search report | 1 |
| US5443365A | Cites | United States of America | A | Search report | 1 |
8 members in 4 offices
Priority claims4
| Document | Office | Kind | Date |
|---|---|---|---|
| 839997 | United States of America | – | |
| 83999797 | United States of America | A | |
| 839997 | – | – | – |
| US19970839997 | – | – | – |
Members8
| Document | Office | Kind | |
|---|---|---|---|
| EP0874136A2 | European Patent Office (EPO) | A2 | |
| US5836744A | United States of America | A | |
| JPH116499A | Japan | A | |
| EP0874136A3This record | European Patent Office (EPO) | A3 | |
| US6146099A | United States of America | A | |
| EP0874136B1 | European Patent Office (EPO) | B1 | |
| DE69817065D1 | Germany | D1 | |
| DE69817065T2 | Germany | T2 |
27 legal events, as 3 offices reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | Office | |
|---|---|---|---|
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Notification of lapseLapsedST | ST | FR | |
| Gb: european patent ceased through non-payment of renewal feeCeasedGBPC | GBPC | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| No opposition filedOpposition26N | 26N | EP | |
| No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE | PLBE | EP | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA | STAA | EP | |
| Fr: translation filedET | ET | EP | |
| Corresponds to:REF | REF | EP | |
| Designated contracting statesAK | AK | EP | |
| European patent grantedGrantedFG4D | FG4D | GB | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH | GRAH | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH | GRAH | EP | |
| First examination report despatched17Q | 17Q | EP | |
| Designation fees paidDE FR GBAKX | AKX | EP | |
| Request for examination filed17P | 17P | EP | |
| Designated contracting statesAK | AK | EP | |
| Request for extension of the european patentAL;LT;LV;MK;RO;SIAX | AX | EP | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | EP | |
| Designated contracting statesAK | AK | EP | |
| Request for extension of the european patentAL;LT;LV;MK;RO;SIAX | AX | EP | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI | EP |
Numbers
- Publication
- 0874136
- Publication, DOCDB
- 0874136
- Publication, EPODOC
- EP0874136
- Application
- 98303199
- Application, DOCDB
- 98303199
- Application, EPODOC
- EP19980303199
Titles3
- German
- Schaufelblatt mit Sollbruchstelle
- English
- Frangible fan blade
- French
- Aube de soufflante frangible
Classification
- CPC, 5
- F01D21/045
- F01D5/147
- F04D29/083
- F04D29/388
- F05D2240/80
- IPC, 5
- F02C7 04
- F01D5 14
- F01D21 04
- F04D29 08
- F04D29 38
Designated states25
- Contracting states, 19
- Austria
- Belgium
- Switzerland
- Cyprus
- Germany
- Denmark
- Spain
- Finland
- France
- United Kingdom
- Greece
- Ireland
- Italy
- Liechtenstein
- Luxembourg
- Monaco
- Netherlands (Kingdom of the)
- Portugal
- Sweden
- Extension states, 6
- Albania
- Lithuania
- Latvia
- North Macedonia
- Romania
- Slovenia