B64C 27/51
Damping of blade movements
B64C27/51 (Damping of blade movements) appears on 198 US grants and 166 published applications in this corpus.
Search patents in B64C- Granted patents
- 198
- Published applications
- 166
- Assignees
- 67
- Inventors
- 321
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 2 |
| 2004 | 3 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 4 |
| 2007 | 1 | 3 |
| 2008 | 1 | 5 |
| 2009 | 1 | 6 |
| 2010 | 4 | 6 |
| 2011 | 1 | 4 |
| 2012 | 7 | 7 |
| 2013 | 4 | 11 |
| 2014 | 12 | 10 |
| 2015 | 8 | 9 |
| 2016 | 15 | 9 |
| 2017 | 6 | 41 |
| 2018 | 6 | 14 |
| 2019 | 18 | 13 |
| 2020 | 22 | 6 |
| 2021 | 7 | 6 |
| 2022 | 6 | 3 |
| 2023 | 8 | 2 |
| 2024 | 2 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fast response rotor system5 May 2026US 12,617,526 B2The United States of America as represented by the Secretary of the Army
- Blade provided with a root comprising an integrated pitch attachment and two integrated damper attachments, and a rotor provided with such a blade11 Mar 2025US 12,246,825 B2Airbus Helicopters
- Active propeller system11 Jun 2024US 12,006,027 B2Ideaforge Technology Pvt. Ltd.
- Single-blade aircraft rotor21 May 2024US 11,987,347 B2Hutchinson
- Self-balancing propeller assembly5 Dec 2023US 11,834,166 B2
- Blade provided with a root comprising an integrated pitch attachment and two integrated damper attachments, and a rotor provided with such a blade2 May 2024US 2024/0140599 A1Airbus Helicopters
- Rotor hub system with rotating pitch control actuator18 Apr 2024US 2024/0124136 A1Korea Aerospace Research Institute
- Active propeller system24 Aug 2023US 2023/0264839 A1Ideaforge Technology Pvt. Ltd.
- Fast response rotor system6 Apr 2023US 2023/0108395 A1U.S. Army DEVCOM Army Research Laboratory
- Single-blade aircraft rotor8 Dec 2022US 2022/0388641 A1Hutchinson
Most cited
By later US patents
- Soft inplane bearingless helicopter rotor66US 4,427,340 ABell Helicopter Textron Inc. · 1984
- Rotor blade internal damper55US 4,329,119 AThe Boeing Company · 1982
- Bearingless hub structure for rotary-wing aircrafts48US 4,676,720 AKawasaki Jukogyo Kabushiki Kaisha · 1987
- Hybrid fluid and elastomer damper45US 5,501,434 ALord Corporation · 1996
- Rotary-wing aircraft rotor head having resilient-return interblade ties with built-in damping44US 4,915,585 AAerospatiale Societe National Industrielle · 1990