F02F 3/00
Pistons
F02F3/00 (Pistons) appears on 2,191 US grants and 1,777 published applications in this corpus.
Search patents in F02F- Granted patents
- 2,191
- Published applications
- 1,777
- Assignees
- 563
- Inventors
- 3,615
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 15 | 0 |
| 1978 | 16 | 0 |
| 1979 | 15 | 0 |
| 1980 | 11 | 0 |
| 1981 | 20 | 0 |
| 1982 | 20 | 0 |
| 1983 | 14 | 0 |
| 1984 | 16 | 0 |
| 1985 | 42 | 0 |
| 1986 | 23 | 0 |
| 1987 | 48 | 0 |
| 1988 | 37 | 0 |
| 1989 | 41 | 0 |
| 1990 | 36 | 0 |
| 1991 | 44 | 0 |
| 1992 | 48 | 0 |
| 1993 | 32 | 0 |
| 1994 | 35 | 0 |
| 1995 | 23 | 0 |
| 1996 | 27 | 0 |
| 1997 | 32 | 0 |
| 1998 | 42 | 0 |
| 1999 | 37 | 0 |
| 2000 | 58 | 0 |
| 2001 | 56 | 10 |
| 2002 | 59 | 45 |
| 2003 | 55 | 38 |
| 2004 | 41 | 52 |
| 2005 | 39 | 40 |
| 2006 | 33 | 45 |
| 2007 | 25 | 66 |
| 2008 | 40 | 56 |
| 2009 | 26 | 55 |
| 2010 | 29 | 60 |
| 2011 | 45 | 67 |
| 2012 | 38 | 69 |
| 2013 | 38 | 95 |
| 2014 | 68 | 93 |
| 2015 | 63 | 123 |
| 2016 | 67 | 124 |
| 2017 | 85 | 145 |
| 2018 | 106 | 124 |
| 2019 | 134 | 91 |
| 2020 | 102 | 127 |
| 2021 | 98 | 70 |
| 2022 | 61 | 49 |
| 2023 | 50 | 44 |
| 2024 | 48 | 25 |
| 2025 | 31 | 30 |
| 2026 | 13 | 34 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F02F 3/16Pistons: having cooling means580
- F02F 3/0015Multi-part pistons570
- F02F 3/26Pistons: having combustion chamber in piston head453
- F02F 3/28Pistons: other pistons with specially-shaped head313
- F02F 3/10Pistons: having surface coverings308
- F02F 3/02Pistons: having means for accommodating or controlling heat expansion175
- F02F 3/0084The pistons being constructed from specific materials158
- F02F 3/24Pistons: having means for guiding gases in cylinders125
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
- Valve system for two-stroke engine4 Aug 2026US 12,698,744 B2GM Global Technology Operations LLC
- Profiled cover plate for a piston23 Jun 2026US 12,662,976 B2Cummins Inc.
- Port assembly for 2-stroke diesel engine9 Jun 2026US 12,650,106 B2DeltaHawk Engines, Inc.
- Piston cooling arrangement1 Oct 2026US 2026/0298174 A1Cummins Inc.
- Spark ignition engine and method for operating spark ignition engine17 Sep 2026US 2026/0275932 A1Mazda Motor Corporation
- Direct injection-type internal combustion engine17 Sep 2026US 2026/0275933 A1Mitsubishi Jidosha Kogyo Kabushiki Kaisha
- Direct injection-type internal combustion engine10 Sep 2026US 2026/0266211 A1Mitsubishi Jidosha Kogyo Kabushiki Kaisha
- Internal combustion engine10 Sep 2026US 2026/0266237 A1Mitsubishi Jidosha Kogyo Kabushiki Kaisha
Most cited
By later US patents
- External combustion slidable vane motor with air cushions149US 4,672,813 A1987
- Plasma jet ignition engine and method122US 4,203,393 AFord Motor Company · 1980
- In-cylinder direct-injection spark-ignition engine98US 6,138,639 ANissan Motor Co., Ltd. · 2000
- Spark-assist type self-ignition engine92US 6,293,246 B1Toyota Jidosha Kabushiki Kaisha · 2001
- Direct fuel injection type spark ignition internal combustion engine having a squish flow for assisting fuel evaporation75US 4,920,937 AToyota Jidosha Kabushiki Kaisha · 1990