F05D 2220/34
In ram-air turbines
Official title: in ram-air turbines ("RATS")
F05D2220/34 (In ram-air turbines) appears on 123 US grants and 120 published applications in this corpus.
Search patents in F05D- Granted patents
- 123
- Published applications
- 120
- Assignees
- 48
- Inventors
- 165
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 0 |
| 2002 | 2 | 4 |
| 2003 | 3 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 3 |
| 2007 | 2 | 3 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 3 | 3 |
| 2011 | 1 | 2 |
| 2012 | 3 | 9 |
| 2013 | 1 | 5 |
| 2014 | 7 | 6 |
| 2015 | 12 | 8 |
| 2016 | 3 | 15 |
| 2017 | 7 | 9 |
| 2018 | 14 | 10 |
| 2019 | 9 | 7 |
| 2020 | 12 | 7 |
| 2021 | 5 | 5 |
| 2022 | 7 | 1 |
| 2023 | 6 | 8 |
| 2024 | 5 | 7 |
| 2025 | 8 | 1 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Turboprop capable of providing a ram air turbine function and aircraft comprising such a turboprop23 Dec 2025US 12,503,248 B2Safran Helicopter Engines
- Ram air turbine23 Dec 2025US 12,503,249 B2ESS 2 Tech, LLC
- Air turbine starter with containment assembly29 Jul 2025US 12,372,031 B2Unison Industries, LLC
- Stowable electric-hybrid propfan22 Jul 2025US 12,365,479 B2Hamilton Sundstrand Corporation
- Integration of generators in an air flow of an aircraft engine29 Apr 2025US 12,286,887 B2Safran Aircraft Engines
- Ram air turbine fixed within aircraft with energy recovery from vented cabin air9 Apr 2026US 2026/0098479 A1Hamilton Sundstrand Corporation
- Ram air turbine fixed within aircraft2 Apr 2026US 2026/0092580 A1Hamilton Sundstrand Corporation
- Ram air turbine26 Mar 2026US 2026/0084829 A1ESS 2 Tech, LLC
- Integration of generators in an air flow of an aircraft engine2 Jan 2025US 2025/0003350 A1Safran Aircraft Engines
- Air turbine starter with containment assembly21 Nov 2024US 2024/0384686 A1Unison Industries, LLC
Most cited
By later US patents
- Low drag ducted Ram air turbine generator and cooling system76US 6,270,309 B1Ghetzler Aero-Power Corporation · 2001
- Turbofan emergency generator74US 7,841,163 B2Hamilton Sundstrand Corporation · 2010
- Ram air turbine system50US 6,127,758 AAlliedSignal Inc. · 2000
- RAM air turbine generating apparatus42US 5,505,587 ANorthrop Grumman Corporation · 1996
- In-line ram air turbine power system42US 5,564,903 AAlliedSignal Inc. · 1996