F02F 3/0015
Multi-part pistons
Official title: {Multi-part pistons}
F02F3/0015 (Multi-part pistons) appears on 570 US grants and 499 published applications in this corpus.
Search patents in F02F- Granted patents
- 570
- Published applications
- 499
- Assignees
- 181
- Inventors
- 801
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 15 | 0 |
| 1986 | 9 | 0 |
| 1987 | 10 | 0 |
| 1988 | 7 | 0 |
| 1989 | 9 | 0 |
| 1990 | 11 | 0 |
| 1991 | 14 | 0 |
| 1992 | 14 | 0 |
| 1993 | 9 | 0 |
| 1994 | 11 | 0 |
| 1995 | 4 | 0 |
| 1996 | 8 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 7 | 0 |
| 2000 | 8 | 0 |
| 2001 | 14 | 3 |
| 2002 | 8 | 7 |
| 2003 | 8 | 5 |
| 2004 | 8 | 12 |
| 2005 | 3 | 6 |
| 2006 | 4 | 10 |
| 2007 | 8 | 9 |
| 2008 | 6 | 21 |
| 2009 | 6 | 19 |
| 2010 | 6 | 25 |
| 2011 | 17 | 29 |
| 2012 | 19 | 31 |
| 2013 | 17 | 27 |
| 2014 | 23 | 39 |
| 2015 | 21 | 49 |
| 2016 | 30 | 43 |
| 2017 | 37 | 38 |
| 2018 | 27 | 31 |
| 2019 | 36 | 24 |
| 2020 | 25 | 23 |
| 2021 | 19 | 8 |
| 2022 | 12 | 13 |
| 2023 | 7 | 7 |
| 2024 | 10 | 3 |
| 2025 | 7 | 9 |
| 2026 | 4 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Multi-part piston construction for an opposed-piston engine29 Sep 2026US 12,747,713 B2General Atomics Aeronautical Systems, Inc.
- Piston system for a compression engine8 Sep 2026US 12,729,642 B2
- Port assembly for 2-stroke diesel engine9 Jun 2026US 12,650,106 B2DeltaHawk Engines, Inc.
- Steel piston for an internal combustion engine24 Mar 2026US 12,584,453 B2Federal-Mogul Nurnberg GmbH
- Internal combustion engine25 Nov 2025US 12,480,457 B2
- Piston and engine9 Jul 2026US 2026/0194026 A1Baudouin (Weifang) Power Co., Ltd.
- A piston head for combustion cylinder, and a cooling gallery for a piston head of a combustion cylinder9 Jul 2026US 2026/0194027 A1Cummins Inc.
- Piston head and piston head assembly28 May 2026US 2026/0146574 A1Cummins Power Generation Inc.
- Internal combustion engine12 Feb 2026US 2026/0043373 A1
- Internal combustion engine12 Feb 2026US 2026/0043374 A1
Most cited
By later US patents
- Piston for internal combustion engines56US 4,581,983 AKarl Schmidt GmbH · 1986
- Two-piece piston assembly53US 4,377,967 AMack Trucks, Inc. · 1983
- Two-piece oil-cooled piston52US 4,180,027 AMack Trucks, Inc. · 1979
- Piston assembly49US 4,013,057 ADana Corporation · 1977
- Oil cooled piston47US 4,286,505 ACaterpillar Tractor Co. · 1981