F05D 2260/4023
Through a friction clutch
Official title: through a friction clutch
F05D2260/4023 (Through a friction clutch) appears on 172 US grants and 196 published applications in this corpus.
Search patents in F05D- Granted patents
- 172
- Published applications
- 196
- Assignees
- 57
- Inventors
- 355
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 3 |
| 2007 | 2 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 3 |
| 2010 | 3 | 8 |
| 2011 | 0 | 2 |
| 2012 | 4 | 0 |
| 2013 | 4 | 8 |
| 2014 | 3 | 3 |
| 2015 | 4 | 7 |
| 2016 | 4 | 6 |
| 2017 | 6 | 18 |
| 2018 | 9 | 15 |
| 2019 | 16 | 13 |
| 2020 | 17 | 17 |
| 2021 | 11 | 26 |
| 2022 | 15 | 9 |
| 2023 | 19 | 16 |
| 2024 | 9 | 17 |
| 2025 | 15 | 10 |
| 2026 | 13 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Spool selection transmissions with towershaft connections29 Sep 2026US 12,747,704 B1Hamilton Sundstrand Corporation
- Clutch assembly for a hybrid-electric aircraft propulsion system18 Aug 2026US 12,709,403 B1Pratt & Whitney Canada Corp.
- Neutral turbine gearbox system and method18 Aug 2026US 12,709,967 B2Signal Power Group Operating LLC
- Multi-speed turbine reduction gearbox system and method18 Aug 2026US 12,709,968 B2Signal Power Group Operating LLC
- Combustor for a micro-turbine gas generator28 Jul 2026US 12,693,020 B2Jetoptera, Inc.
- Electric machine comprising a clutch assembly8 Oct 2026US 2026/0309086 A1Unison Industries, LLC
- Aircraft powerplant gearbox with selectable power coupler1 Oct 2026US 2026/0298146 A1Rtx Corporation
- Aircraft air system with boost compressor(s)13 Aug 2026US 2026/0233843 A1Rtx Corporation
- Compressed gas energy storage and recovery system having pressure control6 Aug 2026US 2026/0226859 A1
- Gas turbine engine with shaft retention system and method of inspecting using the shaft retention system9 Jul 2026US 2026/0193987 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Aircraft engine starting and emergency power generating system275US 4,979,362 ASundstrand Corporation · 1990
- Clutch to disconnect loads during turbine start-up105US 5,174,109 ASundstrand Corporation · 1992
- Aircraft with disengageable engine and auxiliary power unit components72US 7,805,947 B22010
- Aircraft power unit with elective mechanical coupling57US 5,309,029 AThe United States of America as represented by the Secretary of the Air Force · 1994
- Power unit fuel pressurization system56US 5,184,458 A1993