F02F 1/22
Characterised by having ports in cylinder wall for scavenging or charging
Official title: characterised by having ports in cylinder wall for scavenging or charging
F02F1/22 (Characterised by having ports in cylinder wall for scavenging or charging) appears on 337 US grants and 171 published applications in this corpus.
Search patents in F02F- Granted patents
- 337
- Published applications
- 171
- Assignees
- 114
- Inventors
- 474
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 6 | 0 |
| 1982 | 6 | 0 |
| 1983 | 7 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 10 | 0 |
| 1988 | 11 | 0 |
| 1989 | 7 | 0 |
| 1990 | 8 | 0 |
| 1991 | 16 | 0 |
| 1992 | 7 | 0 |
| 1993 | 6 | 0 |
| 1994 | 9 | 0 |
| 1995 | 8 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 9 | 0 |
| 2000 | 14 | 0 |
| 2001 | 8 | 7 |
| 2002 | 6 | 12 |
| 2003 | 15 | 21 |
| 2004 | 11 | 4 |
| 2005 | 12 | 4 |
| 2006 | 5 | 4 |
| 2007 | 4 | 2 |
| 2008 | 3 | 3 |
| 2009 | 4 | 3 |
| 2010 | 3 | 7 |
| 2011 | 2 | 7 |
| 2012 | 3 | 7 |
| 2013 | 2 | 6 |
| 2014 | 4 | 6 |
| 2015 | 10 | 8 |
| 2016 | 7 | 8 |
| 2017 | 8 | 15 |
| 2018 | 14 | 9 |
| 2019 | 9 | 12 |
| 2020 | 9 | 6 |
| 2021 | 11 | 5 |
| 2022 | 6 | 6 |
| 2023 | 12 | 8 |
| 2024 | 4 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multi-port exhaust valve17 Feb 2026US 12,553,402 B2Arctic Cat Inc.
- System and method for deburred port holes in a two-stroke engine29 Oct 2024US 12,129,810 B2Achates Power, Inc.
- Cylinder liner for internal combustion engine and method for installing the same23 Jul 2024US 12,044,191 B2Achates Power, Inc.
- System device for stratified injecting exhaust gas recirculation for clean combustion of internal combustion engine18 Jun 2024US 12,012,912 B2Tianjin University
- Two-stroke engine and method for operating a two-stroke engine7 May 2024US 11,976,587 B2Andreas Stihl AG & CO.KG
- Cylinder Liner for Internal Combustion Engine and Method for Installing the Same16 May 2024US 2024/0159198 A1Achates Power, Inc.
- Two-stroke engine and method for operating a two-stroke engine14 Dec 2023US 2023/0399974 A1Andreas Stihl AG & CO.KG
- System and method for deburred port holes in a two-stroke engine14 Dec 2023US 2023/0399994 A1Achates Power, Inc.
- Multi-port exhaust valve9 Nov 2023US 2023/0359403 A1Arctic Cat Inc.
- Multi-port exhaust valve for two-stroke engines17 Aug 2023US 2023/0258110 A1Arctic Cat Inc.
Most cited
By later US patents
- Combustion chamber importing system for two-cycle diesel engine54US 4,774,919 AYamaha Hatsudoki Kabushiki Kaisha · 1988
- Stratified scavenging two-cycle engine53US 6,289,856 B1Komatsu Zenoah Co. · 2001
- Continuously variable volume scavenging passage for two-stroke engines37US 5,379,732 A1995
- Two stroke engine having exhaust timing control valve means35US 4,388,894 AYamaha Hatsudoki Kabushiki Kaisha · 1983
- Two-stroke internal combustion engine34US 4,576,126 A1986