F01L 3/12
Cooling of valves
F01L3/12 (Cooling of valves) appears on 146 US grants and 133 published applications in this corpus.
Search patents in F01L- Granted patents
- 146
- Published applications
- 133
- Assignees
- 69
- Inventors
- 298
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 3 |
| 2003 | 0 | 2 |
| 2004 | 4 | 3 |
| 2005 | 4 | 0 |
| 2006 | 1 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 2 | 4 |
| 2010 | 1 | 2 |
| 2011 | 1 | 4 |
| 2012 | 2 | 8 |
| 2013 | 4 | 4 |
| 2014 | 5 | 6 |
| 2015 | 3 | 6 |
| 2016 | 6 | 12 |
| 2017 | 10 | 7 |
| 2018 | 8 | 10 |
| 2019 | 5 | 9 |
| 2020 | 9 | 12 |
| 2021 | 9 | 18 |
| 2022 | 20 | 7 |
| 2023 | 9 | 5 |
| 2024 | 4 | 4 |
| 2025 | 4 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Poppet valve24 Feb 2026US 12,560,110 B2Eaton Intelligent Power Limited
- Hydrogen combustion engine and passenger car and commercial vehicle19 Aug 2025US 12,392,266 B2Mahle International GmbH
- Value for an internal combustion engine and production method22 Jul 2025US 12,366,182 B2Mahle International GmbH
- Hollow poppet valve and method of manufacturing8 Jul 2025US 12,352,188 B2Eaton Intelligent Power Limited
- Valve for an overhead cam engine and an overhead cam engine assembly27 May 2025US 12,312,982 B1
- Multi-composition thermal management coating systems for combustion chamber components26 Feb 2026US 2026/0055714 A1Cummins Inc.
- Systems and methods for engine valve cooling4 Sep 2025US 2025/0277461 A1Eaton Intelligent Power Limited
- Hollow poppet valve and method of manufacturing1 Aug 2024US 2024/0254900 A1Eaton Intelligent Power Limited
- Value for an internal combustion engine and production method18 Jul 2024US 2024/0240577 A1Mahle International GmbH
- Hydrogen combustion engine and passenger car and commercial vehicle11 Jul 2024US 2024/0229687 A1Mahle International GmbH
Most cited
By later US patents
- Two-phase heat-transfer systems82US 6,866,092 B12005
- Temperature control in an ultra light engine valve31US 5,458,314 AEaton Corporation · 1995
- Ultra light engine valve30US 5,413,073 AEaton Corporation · 1995
- Engine valve and method of producing the same26US 4,597,367 ANissan Motor Co., Ltd. · 1986
- Method of manufacturing hollow engine valve25US 5,056,219 AAisan Kogyo Kabushiki Kaisha · 1991