F02F 1/24
Cylinder heads
F02F1/24 (Cylinder heads) appears on 2,864 US grants and 1,724 published applications in this corpus.
Search patents in F02F- Granted patents
- 2,864
- Published applications
- 1,724
- Assignees
- 570
- Inventors
- 4,911
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 13 | 0 |
| 1978 | 32 | 0 |
| 1979 | 13 | 0 |
| 1980 | 22 | 0 |
| 1981 | 22 | 0 |
| 1982 | 29 | 0 |
| 1983 | 16 | 0 |
| 1984 | 59 | 0 |
| 1985 | 74 | 0 |
| 1986 | 46 | 0 |
| 1987 | 73 | 0 |
| 1988 | 64 | 0 |
| 1989 | 65 | 0 |
| 1990 | 75 | 0 |
| 1991 | 57 | 0 |
| 1992 | 60 | 0 |
| 1993 | 62 | 0 |
| 1994 | 54 | 0 |
| 1995 | 50 | 0 |
| 1996 | 50 | 0 |
| 1997 | 53 | 0 |
| 1998 | 82 | 0 |
| 1999 | 82 | 0 |
| 2000 | 80 | 0 |
| 2001 | 95 | 40 |
| 2002 | 93 | 105 |
| 2003 | 112 | 78 |
| 2004 | 75 | 79 |
| 2005 | 73 | 53 |
| 2006 | 48 | 20 |
| 2007 | 28 | 31 |
| 2008 | 10 | 28 |
| 2009 | 18 | 51 |
| 2010 | 28 | 50 |
| 2011 | 26 | 40 |
| 2012 | 28 | 62 |
| 2013 | 37 | 65 |
| 2014 | 59 | 62 |
| 2015 | 59 | 109 |
| 2016 | 46 | 122 |
| 2017 | 99 | 139 |
| 2018 | 124 | 106 |
| 2019 | 113 | 114 |
| 2020 | 101 | 114 |
| 2021 | 129 | 86 |
| 2022 | 85 | 59 |
| 2023 | 50 | 38 |
| 2024 | 39 | 39 |
| 2025 | 34 | 14 |
| 2026 | 12 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F02F 1/42Shape or arrangement of intake or exhaust channels in cylinder heads1,353
- F02F 2001/244Arrangement of valve stems in cylinder headsIndexing code1,186
- F02F 1/26Having cooling means740
- F02F 1/242Arrangement of spark plugs or injectors488
- F02F 1/243Cylinder heads and inlet or exhaust manifolds integrally cast together225
- F02F 2001/241Specially adapted to pent roof shape of the combustion chamberIndexing code102
- F02F 2001/249With flame plateIndexing code54
- F02F 2001/248Methods for avoiding thermal stress-induced cracks in the zone between valve seatIndexing code34
Recent patents
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- Cylinder block and internal combustion engine system22 Sep 2026US 12,742,432 B2Cummins Inc.
- Grooved injector nozzle combustion shield11 Aug 2026US 12,704,103 B2Cummins Inc.
- Intake over intake engine21 Jul 2026US 12,687,135 B1
- Engine assembly oil management14 Jul 2026US 12,680,519 B2Arctic Cat Inc.
- Spark ignition engine and method for operating spark ignition engine17 Sep 2026US 2026/0275932 A1Mazda Motor Corporation
- Ducted fuel injection strategy employing baffle for redirection of combusting fuel plumes10 Sep 2026US 2026/0266213 A1Caterpillar Inc.
- Engine13 Aug 2026US 2026/0235068 A1Ishikawa Energy Research Co., Ltd.
- Passive prechamber fueling device and method23 Jul 2026US 2026/0210285 A1Aramco Services Company
- Wall-guided spark assistance for cold operations in gasoline compression ignition engines16 Jul 2026US 2026/0201828 A1Aramco Services Company
Most cited
By later US patents
- Plasma jet ignition engine and method122US 4,203,393 AFord Motor Company · 1980
- Method and apparatus for improved operation of internal combustion engines115US 5,343,699 A1994
- Internal combustion engine102US 4,805,571 AHumphrey Cycle Engine Partners, L.P. · 1989
- In-cylinder direct-injection spark-ignition engine98US 6,138,639 ANissan Motor Co., Ltd. · 2000
- Device for driving electrical current generator for use in motorcycle96US 4,631,469 AHonda Giken Kogyo Kabushiki Kaisha · 1986