F02F 3/18
The means being a liquid or solid coolant
Official title: the means being a liquid or solid coolant, e.g. sodium, in a closed chamber in piston
F02F3/18 (The means being a liquid or solid coolant) appears on 57 US grants and 55 published applications in this corpus.
Search patents in F02F- Granted patents
- 57
- Published applications
- 55
- Assignees
- 28
- Inventors
- 88
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 2 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 3 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 7 |
| 2014 | 2 | 4 |
| 2015 | 3 | 8 |
| 2016 | 3 | 5 |
| 2017 | 3 | 10 |
| 2018 | 4 | 4 |
| 2019 | 9 | 4 |
| 2020 | 6 | 2 |
| 2021 | 4 | 3 |
| 2022 | 1 | 2 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Internal combustion engine19 May 2026US 12,631,138 B2Carnot, S.A.
- Pistons and piston assemblies for internal combustion engines16 Apr 2024US 11,959,412 B2Achates Power, Inc.
- Method for producing a piston for an internal combustion engine, piston for an internal combustion engine, piston blank for producing the piston, and casting mold or forging die for producing a piston blank16 Aug 2022US 11,415,076 B2Federal-Mogul Nurnberg GmbH
- Cooling apparatus of piston and control method thereof31 Aug 2021US 11,105,252 B2Hyundai Motor Company
- Dual gallery steel piston20 Jul 2021US 11,067,033 B2Tenneco Inc.
- Internal combustion engine30 Nov 2023US 2023/0383693 A1Carnot, S.A.
- Pistons and piston assemblies for internal combustion engines10 Nov 2022US 2022/0356834 A1Cummins Inc.
- One-piece cast piston for an internal combustion engine13 Oct 2022US 2022/0325676 A1Federal-Mogul Nurnberg GmbH
- Piston for an internal combustion engine having liquid metal cooling28 Oct 2021US 2021/0332773 A1Mahle International GmbH
- Cooling apparatus of piston and control method thereof15 Apr 2021US 2021/0108553 A1Hyundai Motor Company
Most cited
By later US patents
- Fully hydrodynamic piston ring and piston assembly with elastomerically conforming geometry and internal cooling27US 4,470,375 AAutomotive Engine Associates · 1984
- Heat piped piston24US 4,493,292 AAutomotive Engine Associates · 1985
- Engine piston22US 5,454,351 A1995
- Liquid-cooled, composite piston for internal-combustion engines18US 4,356,800 AKarl Schmidt GmbH · 1982
- Cooling duct piston for a direct-injection diesel engine17US 6,892,689 B2Mahle GmbH · 2005