F05B 2220/31
In ram-air turbines
Official title: in ram-air turbines ("RATS")
F05B2220/31 (In ram-air turbines) appears on 58 US grants and 36 published applications in this corpus.
Search patents in F05B- Granted patents
- 58
- Published applications
- 36
- Assignees
- 18
- Inventors
- 80
- Latest grant
- 16 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 2 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 2 |
| 2012 | 1 | 3 |
| 2013 | 2 | 3 |
| 2014 | 3 | 1 |
| 2015 | 3 | 4 |
| 2016 | 1 | 3 |
| 2017 | 3 | 0 |
| 2018 | 4 | 3 |
| 2019 | 2 | 3 |
| 2020 | 4 | 4 |
| 2021 | 3 | 0 |
| 2022 | 0 | 1 |
| 2023 | 4 | 2 |
| 2024 | 2 | 2 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Fluid accelerator16 Sep 2025US 12,415,615 B2ESS 2 Tech, LLC
- Auxiliary power unit system of an aircraft17 Dec 2024US 12,168,522 B2Airbus Operations S.L.U.
- Geometric approach to stress reduced intra-flow path shrouds for tuning modal responses in ram air turbine rotors2 Jul 2024US 12,025,026 B2Honeywell International Inc.
- Electronic controller with off-load and anti-stall capability for Ram air turbine variable displacement hydraulic pump21 Nov 2023US 11,820,528 B2Hamilton Sundstrand Corporation
- Geometric approach to stress reduced intra-flow path shrouds for tuning modal responses in ram air turbine rotors26 Sep 2023US 11,767,760 B2Honeywell International Inc.
- Fluid accelerator29 Aug 2024US 2024/0286756 A1ESS 2 Tech, LLC
- Geometric approach to stress reduced intra-flow path shrouds for tuning modal responses in ram air turbine rotors21 Mar 2024US 2024/0093609 A1Honeywell International Inc.
- Auxiliary power unit system of an aircraft30 Nov 2023US 2023/0382553 A1Airbus Operations S.L.U.
- Electronic controller with off-load and anti-stall capability for ram air turbine variable displacement hydraulic pump28 Sep 2023US 2023/0303265 A1Hamilton Sundstrand Corporation
- Geometric approach to stress reduced intra-flow path shrouds for tuning modal responses in ram air turbine rotors5 May 2022US 2022/0135242 A1Honeywell International Inc.
Most cited
By later US patents
- Ram air turbine and deployment mechanism53US 4,742,976 ASundstrand Corporation · 1988
- Support strut for ram air driven turbine51US 5,484,120 ASundstrand Corporation · 1996
- Ram air turbine with speed increasing gearbox47US 6,676,379 B2Honeywell International Inc. · 2004
- 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