B64D 41/007
Ram air turbines
Official title: {Ram air turbines}
B64D41/007 (Ram air turbines) appears on 286 US grants and 288 published applications in this corpus.
Search patents in B64D- Granted patents
- 286
- Published applications
- 288
- Assignees
- 77
- Inventors
- 362
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 2 |
| 2003 | 2 | 3 |
| 2004 | 1 | 0 |
| 2005 | 2 | 2 |
| 2006 | 3 | 8 |
| 2007 | 4 | 2 |
| 2008 | 2 | 1 |
| 2009 | 1 | 4 |
| 2010 | 3 | 3 |
| 2011 | 3 | 9 |
| 2012 | 4 | 20 |
| 2013 | 5 | 21 |
| 2014 | 19 | 17 |
| 2015 | 20 | 23 |
| 2016 | 18 | 24 |
| 2017 | 21 | 23 |
| 2018 | 21 | 22 |
| 2019 | 25 | 15 |
| 2020 | 24 | 21 |
| 2021 | 13 | 15 |
| 2022 | 14 | 8 |
| 2023 | 18 | 14 |
| 2024 | 11 | 15 |
| 2025 | 14 | 7 |
| 2026 | 6 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ram air turbine (RAT) restow pump drive system8 Sep 2026US 12,729,009 B2Hamilton Sundstrand Corporation
- Emergency power generation system for an aircraft28 Jul 2026US 12,692,012 B2Airbus Operations S.L.U.
- Mode selection valve for RAT re-stow pump14 Apr 2026US 12,601,345 B2Hamilton Sundstrand Corporation
- Ducted supplemental power unit of aircraft10 Feb 2026US 12,545,427 B2Hamilton Sundstrand Corporation
- RAM air cooling power recovery20 Jan 2026US 12,528,589 B2Hamilton Sundstrand Corporation
- Method and system for monitoring the performance of a pair of hydraulic accumulators on an aircraft16 Jul 2026US 2026/0204108 A1Airbus Canada Limited Partnership
- Electric power generation system for an aircraft18 Jun 2026US 2026/0167346 A1Airbus Operations, S L.
- Air system with generator for cabin pressurization7 May 2026US 2026/0125156 A1Honeywell International Inc.
- System and methods for implementing regional air transit network using hybrid-electric aircraft16 Apr 2026US 2026/0104259 A1Zunum Aero, Inc.
- Ram air turbine fixed within aircraft with energy recovery from vented cabin air9 Apr 2026US 2026/0098479 A1Hamilton Sundstrand Corporation
Most cited
By later US patents
- Low drag ducted Ram air turbine generator and cooling system76US 6,270,309 B1Ghetzler Aero-Power Corporation · 2001
- Independent power generation in aircraft68US 8,657,227 B1The Boeing Company · 2014
- Independent power generation in aircraft63US 8,950,703 B2The Boeing Company · 2015
- Aircraft auxiliary air intake with ram and flush opening door56US 6,349,899 B1The Boeing Company · 2002
- RAM fan system for an aircraft environmental control system54US 7,757,502 B2Hamilton Sundstrand Corporation · 2010