B64C 2027/7233
Using higher-harmonic control [hhc]
Official title: {using higher-harmonic control [HHC]}
B64C2027/7233 (Using higher-harmonic control [hhc]) appears on 15 US grants and 13 published applications in this corpus.
Search patents in B64C- Granted patents
- 15
- Published applications
- 13
- Assignees
- 12
- Inventors
- 34
- Latest grant
- 7 Mar 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 0 | 1 |
| 2016 | 3 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 3 | 3 |
| 2020 | 2 | 2 |
| 2021 | 1 | 0 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Rotor head for aerial vehicle7 Mar 2023US 11,597,506 B2Ft Holdings Inc.
- Actuator system for a fly-by-wire aircraft26 Apr 2022US 11,313,391 B2Sikorsky Aircraft Corporation
- Actuator motion controller with regeneration compensation21 Dec 2021US 11,205,982 B2Lord Corporation
- Proprotor flapping control systems for tiltrotor aircraft3 Mar 2020US 10,577,096 B2Textron Innovations Inc.
- Higher harmonic control augmented with active vibration control28 Jan 2020US 10,543,912 B2Sikorsky Aircraft Corporation
- Rotor blade assembly for unmanned aerial vehicle systems and methods9 Oct 2025US 2025/0313359 A1FLIR Unmanned Aerial Systems AS
- Actuator motion controller with regeneration compensation31 Mar 2022US 2022/0103101 A1Lord Corporation
- Rotor head for aerialvehicle8 Oct 2020US 2020/0317330 A1Ft Holdings Inc.
- Improved actuator motion controller with regeneration compensation16 Jul 2020US 2020/0228037 A1Lord Corporation
- Actuator system for a fly-by-wire aircraft14 Nov 2019US 2019/0344885 A1Sikorsky Aircraft Corporation
Most cited
By later US patents
- Dual higher harmonic control (HHC) for a counter-rotating, coaxial rotor system38US 7,648,338 B1Sikorsky Aircraft Corporation · 2010
- Method and device for the reduction of the oscillations of a divergent nature of the fuselage of a helicopter27US 5,242,130 AAerospatiale Societe Nationale Industrielle · 1993
- Helicopter rotor blade control device19US 6,099,254 AZF Luftfahrttechnik GmbH · 2000
- Ring cam and ring cam assembly for dynamically controlling pitch of cycloidal rotor blades13US 9,346,535 B1The United States of America as represented by the Secretary of the Air Force · 2016
- Method and device for reducing the effect of the vibration generated by the driveline of a helicopter12US 5,895,012 AEurocopter France · 1999