F02F 3/24
Pistons: having means for guiding gases in cylinders
Official title: having means for guiding gases in cylinders, e.g. for guiding scavenging charge in two-stroke engines
F02F3/24 (Pistons: having means for guiding gases in cylinders) appears on 125 US grants and 128 published applications in this corpus.
Search patents in F02F- Granted patents
- 125
- Published applications
- 128
- Assignees
- 66
- Inventors
- 266
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 0 | 4 |
| 2004 | 2 | 0 |
| 2005 | 2 | 2 |
| 2006 | 4 | 4 |
| 2007 | 1 | 2 |
| 2008 | 0 | 0 |
| 2009 | 2 | 2 |
| 2010 | 0 | 5 |
| 2011 | 2 | 6 |
| 2012 | 2 | 5 |
| 2013 | 3 | 3 |
| 2014 | 7 | 3 |
| 2015 | 6 | 14 |
| 2016 | 3 | 10 |
| 2017 | 6 | 8 |
| 2018 | 13 | 11 |
| 2019 | 13 | 8 |
| 2020 | 9 | 15 |
| 2021 | 13 | 5 |
| 2022 | 3 | 3 |
| 2023 | 11 | 7 |
| 2024 | 2 | 2 |
| 2025 | 2 | 2 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Valve system for two-stroke engine4 Aug 2026US 12,698,744 B2GM Global Technology Operations LLC
- Piston and injector for reduced head thermal loading12 May 2026US 12,624,671 B1Deere & Company
- Low compression natural gas engine piston bowl for improved combustion stability1 Apr 2025US 12,264,636 B2Caterpillar Inc.
- Internal combustion engine for gaseous fuel18 Mar 2025US 12,253,046 B2Volvo Truck Corporation
- Annular ring groove of a piston3 Sep 2024US 12,078,122 B2Ai Alpine US Bidco Inc
- 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
- Piston and injector for reduced head thermal loading14 May 2026US 2026/0132756 A1Deere & Company
- Two-stroke engine2 Apr 2026US 2026/0092553 A1Andreas Stihl AG & CO.KG
Most cited
By later US patents
- Stratified scavenging two-cycle engine53US 6,289,856 B1Komatsu Zenoah Co. · 2001
- Engine valve means and porting27US 4,000,723 APerformance Industries, Inc. · 1977
- Combustion chamber constructions for opposed-piston engines26US 8,800,528 B2Achates Power, Inc. · 2014
- Two-stroke internal combustion engine20US 7,025,021 B1Aktiebolaget Electrolux · 2006
- Ducted combustion chamber for direct injection engines and method19US 8,967,129 B2Caterpillar Inc. · 2015