B64C 27/45
With a feathering hinge only
Official title: with a feathering hinge only
B64C27/45 (With a feathering hinge only) appears on 16 US grants and 3 published applications in this corpus.
Search patents in B64C- Granted patents
- 16
- Published applications
- 3
- Assignees
- 10
- Inventors
- 28
- Latest grant
- 27 Sep 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 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 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Rotor retention fitting with integral bearing and pitch control27 Sep 2022US 11,454,280 B2Textron Innovations Inc.
- Rotor blade, in particular for helicopter antitorque tail rotor11 Sep 2001US 6,287,076 B1
- Semi-articulated rotor system18 Apr 2000US 6,050,778 AThe Boeing Company
- Hub for rotary wing aircraft15 Apr 1997US 5,620,305 AThe Boeing Company
- Ducted fan and pitch controls for tail rotor of rotary wing aircraft26 Dec 1995US 5,478,204 AThe Boeing Company
Most cited
By later US patents
- Multi-blade propellers34US 4,281,966 ASociete Nationale Industrielle Aerospatiale · 1981
- Hub for rotary wing aircraft28US 5,620,305 AThe Boeing Company · 1997
- Blade-hub linkage device with a laminate attachment27US 5,383,767 AEurocopter France · 1995
- Rotor free of flapping hinges and free of lead-lag hinges17US 4,195,967 AMesserschmitt-Boelkow-Blohm GmbH · 1980
- Semi-articulated rotor system17US 6,050,778 AThe Boeing Company · 2000