F01P 3/10
Cooling by flow of coolant through pistons
F01P3/10 (Cooling by flow of coolant through pistons) appears on 76 US grants and 85 published applications in this corpus.
Search patents in F01P- Granted patents
- 76
- Published applications
- 85
- Assignees
- 51
- Inventors
- 193
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 2 |
| 2006 | 2 | 1 |
| 2007 | 2 | 2 |
| 2008 | 1 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 3 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 4 |
| 2014 | 0 | 5 |
| 2015 | 4 | 11 |
| 2016 | 6 | 3 |
| 2017 | 6 | 16 |
| 2018 | 7 | 5 |
| 2019 | 6 | 10 |
| 2020 | 9 | 4 |
| 2021 | 6 | 7 |
| 2022 | 5 | 3 |
| 2023 | 0 | 1 |
| 2024 | 5 | 2 |
| 2025 | 2 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Piston bearing assembly for an opposed-piston engine30 Dec 2025US 12,510,015 B2General Atomics Aeronautical Systems, Inc.
- Lubrication system for a pin joint of an engine piston, an engine piston, and a method of lubricating a pin joint of an engine piston12 Aug 2025US 12,385,447 B2Cummins Inc.
- Method for absorbing hydrogen in a crankcase of a hydrogen internal combustion engine, a system for a motor vehicle, and a motor vehicle31 Dec 2024US 12,180,877 B1Hyundai Motor Company
- Heat management system and heat management method of an internal combustion engine10 Sep 2024US 12,085,007 B2Ino8 Pty Ltd.
- Piston for an internal combustion engine and method for producing the piston7 May 2024US 11,976,608 B2Mahle International GmbH
- Piston and internal combustion engine5 Feb 2026US 2026/0036073 A1Isuzu Motors Limited
- Heat Management System and Heat Management Method of an Internal Combustion Engine19 Dec 2024US 2024/0418118 A1Ino8 Pty Ltd.
- Lubrication system for a pin joint of an engine piston, an engine piston, and a method of lubricating a pin joint of an engine piston15 Aug 2024US 2024/0271586 A1Cummins Inc.
- Heat Management System and Heat Management Method of an Internal Combustion Engine30 Nov 2023US 2023/0383688 A1Ino8 Pty Ltd.
- Compact piston valve8 Dec 2022US 2022/0389855 A1Bontaz Centre R & D
Most cited
By later US patents
- Opposed piston engine33US 7,360,511 B2Achates Power, Inc. · 2008
- Ringless piston engine32US 4,724,800 ASouthwest Research Institute · 1988
- Piston of combustion engine26US 4,517,930 AKawasaki Jukogyo Kabushiki Kaisha · 1985
- Cooling structure of diesel engine piston21US 5,595,145 AKabushiki Kaisha Komatsu Seisakusho · 1997
- Nozzle assembly for controlled spray14US 4,408,575 ACaterpillar Tractor Co. · 1983