F02K 3/04
The plant including ducted fans, i.e. fans with high volume, low pressure
Official title: the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type
F02K3/04 (The plant including ducted fans, i.e. fans with high volume, low pressure) appears on 3,439 US grants and 4,107 published applications in this corpus.
Search patents in F02K- Granted patents
- 3,439
- Published applications
- 4,107
- Assignees
- 241
- Inventors
- 3,769
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 15 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 8 | 0 |
| 1981 | 7 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 6 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 13 | 0 |
| 1989 | 10 | 0 |
| 1990 | 14 | 0 |
| 1991 | 11 | 0 |
| 1992 | 11 | 0 |
| 1993 | 14 | 0 |
| 1994 | 13 | 0 |
| 1995 | 13 | 0 |
| 1996 | 0 | 0 |
| 1997 | 5 | 0 |
| 1998 | 10 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 1 |
| 2002 | 11 | 10 |
| 2003 | 16 | 24 |
| 2004 | 20 | 29 |
| 2005 | 22 | 29 |
| 2006 | 15 | 53 |
| 2007 | 26 | 64 |
| 2008 | 27 | 123 |
| 2009 | 47 | 121 |
| 2010 | 71 | 130 |
| 2011 | 85 | 95 |
| 2012 | 90 | 101 |
| 2013 | 101 | 178 |
| 2014 | 119 | 160 |
| 2015 | 134 | 177 |
| 2016 | 85 | 284 |
| 2017 | 112 | 323 |
| 2018 | 229 | 341 |
| 2019 | 319 | 275 |
| 2020 | 358 | 396 |
| 2021 | 300 | 227 |
| 2022 | 274 | 173 |
| 2023 | 225 | 211 |
| 2024 | 232 | 176 |
| 2025 | 200 | 217 |
| 2026 | 120 | 189 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F02K 3/06With front fan2,434
- F02K 3/075Controlling flow ratio between flows526
- F02K 3/072With counter-rotating283
- F02K 3/077The plant being of the multiple flow type, i.e. having three or243
- F02K 3/068Being characterised by a short axial length relative to the diameter120
- F02K 3/062With aft fan89
- F02K 3/065With front and aft fans50
Recent patents
- Inducer assembly for a turbine engine29 Sep 2026US 12,746,491 B2General Electric Company
- Flexible support structure for a geared architecture gas turbine engine29 Sep 2026US 12,747,675 B2Rtx Corporation
- Gas turbine engine with acoustic spacing of the fan blades and outlet guide vanes29 Sep 2026US 12,747,699 B2General Electric Company
- Gas turbine engine with acoustic spacing of the fan blades and outlet guide vanes29 Sep 2026US 12,747,700 B2General Electric Company
- Gas turbine engine with acoustic spacing of the fan blades and outlet guide vanes29 Sep 2026US 12,747,735 B2General Electric Company
- Radius ratio high-speed shaft rating for turbine engines8 Oct 2026US 2026/0309105 A1General Electric Company
- Actuatable airflow splitter for aircraft propulsion system1 Oct 2026US 2026/0296664 A1Rtx Corporation
- Compact gear train for turbomachine reducer1 Oct 2026US 2026/0298150 A1Safran Transmission Systems
- Superconducting ultra power efficient radial fan augmented nano-aerodrive (superfan)1 Oct 2026US 2026/0298178 A1Sonic Blue Aerospace, Inc.
- Flow deflector having channels with double ejection angles1 Oct 2026US 2026/0298265 A1Safran Aircraft Engines
Most cited
By later US patents
- Variable area fan exhaust nozzle having mechanically separate sleeve and thrust reverser actuation systems474US 5,778,659 AUnited Technologies Corporation · 1998
- Low solidity turbofan352US 7,374,403 B2General Electric Company · 2008
- Aircraft engine with inter-turbine engine frame supported counter rotating low pressure turbine rotors329US 6,619,030 B1General Electric Company · 2003
- Counter rotating aircraft gas turbine engine with high overall pressure ratio compressor248US 6,732,502 B2General Electric Company · 2004
- Turbofan gas turbine engine242US 4,827,712 AROLLS-ROYCE plc · 1989