F16D 23/04
With an additional friction clutch
Official title: with an additional friction clutch (synchro rings per se F16D23/025)
F16D23/04 (With an additional friction clutch) appears on 627 US grants and 421 published applications in this corpus.
Search patents in F16D- Granted patents
- 627
- Published applications
- 421
- Assignees
- 219
- Inventors
- 1,032
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 8 | 0 |
| 1978 | 4 | 0 |
| 1979 | 6 | 0 |
| 1980 | 5 | 0 |
| 1981 | 12 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 6 | 0 |
| 1986 | 13 | 0 |
| 1987 | 7 | 0 |
| 1988 | 9 | 0 |
| 1989 | 24 | 0 |
| 1990 | 8 | 0 |
| 1991 | 12 | 0 |
| 1992 | 23 | 0 |
| 1993 | 5 | 0 |
| 1994 | 7 | 0 |
| 1995 | 8 | 0 |
| 1996 | 12 | 0 |
| 1997 | 18 | 0 |
| 1998 | 16 | 0 |
| 1999 | 18 | 0 |
| 2000 | 10 | 0 |
| 2001 | 13 | 3 |
| 2002 | 12 | 12 |
| 2003 | 13 | 13 |
| 2004 | 13 | 20 |
| 2005 | 9 | 11 |
| 2006 | 10 | 11 |
| 2007 | 6 | 17 |
| 2008 | 7 | 19 |
| 2009 | 9 | 8 |
| 2010 | 12 | 19 |
| 2011 | 3 | 20 |
| 2012 | 19 | 22 |
| 2013 | 21 | 15 |
| 2014 | 14 | 18 |
| 2015 | 24 | 23 |
| 2016 | 18 | 28 |
| 2017 | 24 | 31 |
| 2018 | 17 | 27 |
| 2019 | 26 | 31 |
| 2020 | 29 | 19 |
| 2021 | 28 | 17 |
| 2022 | 14 | 13 |
| 2023 | 9 | 12 |
| 2024 | 13 | 8 |
| 2025 | 6 | 4 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Transmission powertrain vehicle and method13 Jan 2026US 12,523,274 B2Traton AB
- Electromagnetic clutch comprising a selector sleeve2 Dec 2025US 12,486,876 B2Hoerbiger Antriebstechnik Holding GmbH
- Friction assisted dog clutch29 Jul 2025US 12,372,121 B1Dana Belgium N.V.
- One way clutch train for arresting backspin1 Jul 2025US 12,345,139 B2Baker Hughes Oilfield Operations LLC
- Transmission, gearbox and vehicle20 May 2025US 12,305,735 B2Volvo Truck Corporation
- Friction assisted dog clutch31 Jul 2025US 2025/0243913 A1Dana Belgium N.V.
- Transmission powertrain vehicle and method29 May 2025US 2025/0172194 A1Scania CV AB
- Sliding sleeve22 May 2025US 2025/0163975 A1Miba Sinter Austria GmbH
- Friction clutch of a multispeed transmission and electric drive of a vehicle24 Apr 2025US 2025/0129823 A1Hoerbiger Antriebstechnik Holding GmbH
- Electromagnetic clutch comprising a selector sleeve14 Nov 2024US 2024/0376941 A1Hoerbiger Antriebstechnik Holding GmbH
Most cited
By later US patents
- Synchronizer for a gear shift mechanism for a marine propulsion system1,418US 6,062,360 ABrunswick Corporation · 2000
- Synchronizer clutch assembly for multiple ratio gearing1,374US 5,531,305 ABorg-Warner Automotive, Inc. · 1996
- Reverse brake for manual transmissions170US 5,651,435 ANew Venture Gear, Inc. · 1997
- Multiple cone synchronizer for vehicle transmission168US 5,560,461 ADana Corporation · 1996
- Synchronizer clutch165US 5,975,263 ANew Venture Gear, Inc. · 1999