F16D 48/04
Providing power assistance
Official title: providing power assistance
F16D48/04 (Providing power assistance) appears on 198 US grants and 91 published applications in this corpus.
Search patents in F16D- Granted patents
- 198
- Published applications
- 91
- Assignees
- 114
- Inventors
- 359
- Latest grant
- 28 Feb 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 7 | 0 |
| 1987 | 5 | 0 |
| 1988 | 7 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 6 | 0 |
| 1992 | 9 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 2 |
| 2002 | 4 | 5 |
| 2003 | 5 | 4 |
| 2004 | 5 | 3 |
| 2005 | 4 | 11 |
| 2006 | 9 | 9 |
| 2007 | 7 | 9 |
| 2008 | 3 | 13 |
| 2009 | 9 | 8 |
| 2010 | 7 | 2 |
| 2011 | 5 | 3 |
| 2012 | 5 | 3 |
| 2013 | 2 | 0 |
| 2014 | 2 | 4 |
| 2015 | 3 | 0 |
| 2016 | 1 | 5 |
| 2017 | 0 | 1 |
| 2018 | 5 | 1 |
| 2019 | 2 | 4 |
| 2020 | 2 | 1 |
| 2021 | 2 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Clutch engagement booster system28 Feb 2023US 11,592,066 B2
- Drive device for PTO shaft of working machine18 Oct 2022US 11,472,285 B2Kubota Corporation
- Silencer for clutch air booster16 Nov 2021US 11,176,921 B2Hyundai Motor Company
- Opposed high pressure hydraulic system23 Feb 2021US 10,926,753 B2Rg3 Inprop, LLC
- Power clutch actuating device8 Sep 2020US 10,767,664 B2
- Adaptive platform for hydraulic clutches12 Jun 2025US 2025/0188998 A1Pt Tech, LLC
- Opposed high pressure hydraulic system13 Jan 2022US 2022/0009467 A1Rg3 Inprop, LLC
- Clutch Engagement Booster System11 Nov 2021US 2021/0348657 A1
- Drive device for pto shaft of working machine6 Aug 2020US 2020/0248807 A1Kubota Corporation
- Power clutch actuating device22 Aug 2019US 2019/0257324 A1
Most cited
By later US patents
- Dynamic clutch control885US 6,799,669 B2Siemens VDO Automotive Corporation · 2004
- Multi-function control valve for hydraulic coupling40US 5,967,285 ANew Venture Gear, Inc. · 1999
- Coaxial push rod and hollow screw ball nut drive for master cylinder38US 4,918,921 AAutomotive Products plc · 1990
- Clutch system37US 6,789,658 B2ZF Sachs AG · 2004
- Cooling oil cut-off valve for a clutch33US 4,529,073 ADeere & Company · 1985