F16D 2048/0221
Valves for clutch control systems
Official title: {Valves for clutch control systems; Details thereof}
F16D2048/0221 (Valves for clutch control systems) appears on 339 US grants and 223 published applications in this corpus.
Search patents in F16D- Granted patents
- 339
- Published applications
- 223
- Assignees
- 144
- Inventors
- 631
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 4 | 0 |
| 1978 | 10 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 6 | 0 |
| 1984 | 9 | 0 |
| 1985 | 10 | 0 |
| 1986 | 11 | 0 |
| 1987 | 11 | 0 |
| 1988 | 3 | 0 |
| 1989 | 8 | 0 |
| 1990 | 7 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 5 | 0 |
| 2001 | 7 | 2 |
| 2002 | 3 | 0 |
| 2003 | 2 | 4 |
| 2004 | 1 | 8 |
| 2005 | 5 | 5 |
| 2006 | 9 | 13 |
| 2007 | 5 | 8 |
| 2008 | 4 | 10 |
| 2009 | 5 | 20 |
| 2010 | 7 | 10 |
| 2011 | 10 | 9 |
| 2012 | 10 | 10 |
| 2013 | 6 | 8 |
| 2014 | 13 | 3 |
| 2015 | 7 | 9 |
| 2016 | 10 | 17 |
| 2017 | 13 | 11 |
| 2018 | 14 | 8 |
| 2019 | 6 | 16 |
| 2020 | 17 | 11 |
| 2021 | 7 | 11 |
| 2022 | 8 | 7 |
| 2023 | 10 | 11 |
| 2024 | 12 | 9 |
| 2025 | 7 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for calibrating transmission5 May 2026US 12,618,466 B2Dana Belgium N.V.
- Selective fluid delivery unit for a power transmission20 Jan 2026US 12,529,400 B2
- Method for the valve control of a hydraulic valve11 Nov 2025US 12,468,320 B2Schaeffler Technologies AG & Co. KG
- Method for controlling a hydraulic control device21 Oct 2025US 12,449,007 B2Schaeffler Technologies AG & Co. KG
- Methods and systems for improving the operation of transmissions for motor vehicles7 Oct 2025US 12,435,786 B2Transgo, LLC
- High-pressure hydraulic clutch cooling system for work vehicles30 Jul 2026US 2026/0218761 A1Deere & Company
- System and method for calibrating transmission30 Apr 2026US 2026/0117860 A1Dana Belgium N.V.
- Selective fluid delivery unit for a power transmission20 Nov 2025US 2025/0354588 A1
- Safety valve, pneumatic actuator, and vehicle24 Oct 2024US 2024/0353017 A1Zf Cv Systems Europe BV
- Safety valve, pneumatic actuator, and vehicle17 Oct 2024US 2024/0344534 A1Zf Cv Systems Europe BV
Most cited
By later US patents
- Lube assembly for a transmission friction device43US 5,577,588 AGeneral Motors Corporation · 1996
- Multi-function control valve for hydraulic coupling40US 5,967,285 ANew Venture Gear, Inc. · 1999
- Multi-mode clutch for change-speed transmissions36US 5,031,746 A1991
- Cooling oil cut-off valve for a clutch33US 4,529,073 ADeere & Company · 1985
- Pressure control valve device30US 8,701,707 B2ZF Friedrichshafen AG · 2014