F01D 7/02
Rotors with blades adjustable in operation: having adjustment responsive to speed
Official title: having adjustment responsive to speed
F01D7/02 (Rotors with blades adjustable in operation: having adjustment responsive to speed) appears on 67 US grants and 60 published applications in this corpus.
Search patents in F01D- Granted patents
- 67
- Published applications
- 60
- Assignees
- 23
- Inventors
- 150
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 3 |
| 2010 | 2 | 0 |
| 2011 | 2 | 0 |
| 2012 | 0 | 3 |
| 2013 | 0 | 3 |
| 2014 | 0 | 3 |
| 2015 | 3 | 3 |
| 2016 | 4 | 5 |
| 2017 | 4 | 5 |
| 2018 | 6 | 1 |
| 2019 | 3 | 3 |
| 2020 | 7 | 5 |
| 2021 | 1 | 2 |
| 2022 | 1 | 7 |
| 2023 | 7 | 3 |
| 2024 | 7 | 6 |
| 2025 | 6 | 2 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Wind energy conversion system47US 4,495,423 AFelt Products Mfg. Co. · 1985
- Air driven turbine including a blade pitch control system39US 5,779,446 ASundstrand Corporation · 1998
- Hybrid turbo electric aero-propulsion system control36US 9,586,690 B2Rolls-Royce North American Technologies Inc. · 2017
- Ram air turbine control system33US 4,743,163 ASundstrand Corporation · 1988
- Propeller pitch control33US 5,213,471 AGeneral Electric Company · 1993