B64C 11/30
Blade pitch-changing mechanisms
B64C11/30 (Blade pitch-changing mechanisms) appears on 897 US grants and 928 published applications in this corpus.
Search patents in B64C- Granted patents
- 897
- Published applications
- 928
- Assignees
- 205
- Inventors
- 1,301
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 11 | 0 |
| 1988 | 12 | 0 |
| 1989 | 5 | 0 |
| 1990 | 14 | 0 |
| 1991 | 11 | 0 |
| 1992 | 10 | 0 |
| 1993 | 10 | 0 |
| 1994 | 8 | 0 |
| 1995 | 6 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 0 |
| 2002 | 4 | 4 |
| 2003 | 7 | 5 |
| 2004 | 4 | 3 |
| 2005 | 2 | 5 |
| 2006 | 5 | 2 |
| 2007 | 4 | 5 |
| 2008 | 0 | 7 |
| 2009 | 0 | 7 |
| 2010 | 2 | 19 |
| 2011 | 8 | 25 |
| 2012 | 17 | 20 |
| 2013 | 10 | 29 |
| 2014 | 27 | 24 |
| 2015 | 24 | 30 |
| 2016 | 29 | 39 |
| 2017 | 30 | 65 |
| 2018 | 35 | 71 |
| 2019 | 70 | 77 |
| 2020 | 86 | 83 |
| 2021 | 65 | 74 |
| 2022 | 70 | 66 |
| 2023 | 79 | 43 |
| 2024 | 65 | 80 |
| 2025 | 86 | 54 |
| 2026 | 40 | 91 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B64C 11/32Mechanical304
- B64C 11/38Fluid251
- B64C 11/44Electric119
- B64C 11/305Characterised by being influenced by other control systems105
- B64C 11/306Specially adapted for contrarotating propellers102
- B64C 11/301Characterised by blade position indicating means70
- B64C 11/303Characterised by comprising a governor61
Recent patents
- Energy recovery system and method for an aircraft6 Oct 2026US 12,752,925 B2Airbus Operations S.L.U.
- Battery and engine architecture for VTOL aircraft25 Aug 2026US 12,715,578 B2Archer Aviation Inc.
- Use of propeller electronic controller in protection from uncontrollable high thrust25 Aug 2026US 12,715,598 B1Pratt & Whitney Canada Corp.
- Systems and methods for controlling engine speed and/or pitch of propulsion members for aerial vehicles25 Aug 2026US 12,715,628 B2Sonin Hybrid, LLC
- Independent mitigation for isolation of electric motor25 Aug 2026US 12,719,398 B2Pratt & Whitney Canada Corp.
- Variable-pitch propeller passively controlled by thrust8 Oct 2026US 2026/0307780 A1Lockheed Martin Corporation
- Peak Efficiency Propeller Control8 Oct 2026US 2026/0307781 A1Pipistrel d.o.o.
- Variable toroidal propeller1 Oct 2026US 2026/0296613 A1Alpraaz AB
- Fan rotor with actuator with locking device24 Sep 2026US 2026/0285475 A1Safran Aircraft Engines
- Automated Variable Pitch Propeller Blade10 Sep 2026US 2026/0264842 A1Skydio, Inc.
Most cited
By later US patents
- Unducted, counterrotating gearless front fan engine107US 4,976,102 AGeneral Electric Company · 1990
- Pitch change mechanism100US 5,174,716 AGeneral Electric Company · 1992
- Electromechanical apparatus for varying blade of variable-pitch fan blades83US 5,281,094 AAlliedSignal Inc. · 1994
- Counter rotation power turbine80US 5,079,916 AGeneral Electric Company · 1992
- Shape memory alloy device and control method70US 6,499,952 B1The Boeing Company · 2002