F02B 25/02
Engines characterised by using fresh charge for scavenging cylinders: using unidirectional scavenging
Official title: using unidirectional scavenging
F02B25/02 (Engines characterised by using fresh charge for scavenging cylinders: using unidirectional scavenging) appears on 392 US grants and 330 published applications in this corpus.
Search patents in F02B- Granted patents
- 392
- Published applications
- 330
- Assignees
- 119
- Inventors
- 501
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 10 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 8 | 0 |
| 1990 | 6 | 0 |
| 1991 | 14 | 0 |
| 1992 | 7 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 9 | 2 |
| 2002 | 4 | 2 |
| 2003 | 4 | 7 |
| 2004 | 9 | 6 |
| 2005 | 9 | 8 |
| 2006 | 2 | 8 |
| 2007 | 5 | 6 |
| 2008 | 4 | 9 |
| 2009 | 7 | 7 |
| 2010 | 2 | 9 |
| 2011 | 7 | 21 |
| 2012 | 6 | 23 |
| 2013 | 14 | 18 |
| 2014 | 15 | 26 |
| 2015 | 23 | 30 |
| 2016 | 22 | 37 |
| 2017 | 22 | 20 |
| 2018 | 29 | 14 |
| 2019 | 20 | 13 |
| 2020 | 9 | 15 |
| 2021 | 16 | 14 |
| 2022 | 16 | 4 |
| 2023 | 5 | 15 |
| 2024 | 12 | 7 |
| 2025 | 5 | 6 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Valve system for two-stroke engine4 Aug 2026US 12,698,744 B2GM Global Technology Operations LLC
- Intake over intake engine21 Jul 2026US 12,687,135 B1
- Port assembly for 2-stroke diesel engine9 Jun 2026US 12,650,106 B2DeltaHawk Engines, Inc.
- High-efficiency linear generator23 Sep 2025US 12,421,890 B2Mainspring Energy, Inc.
- Self-charged four stroke one-cycle combustion cylinder for internal combustion engine29 Jul 2025US 12,372,016 B1
- Two stroke apposed pistons parallel cylinders internal combustion engine1 Oct 2026US 2026/0298132 A1
- Internal combustion engine20 Aug 2026US 2026/0243195 A1
- Internal combustion engine20 Aug 2026US 2026/0243196 A1
- Valve system for two-stroke engine20 Nov 2025US 2025/0354528 A1GM Global Technology Operations LLC
- Operating Modes for Two-Cycle Uniflow-Scavenged Diesel Engine21 Aug 2025US 2025/0264068 A1
Most cited
By later US patents
- Internal combustion engine with a single crankshaft and having opposed cylinders with opposed pistons130US 6,170,443 B22001
- Internal combustion engine with an exhaust gas recirculation system118US 5,740,786 AMercedes-Benz AG · 1998
- Dual fuel engine60US 4,527,516 APro-Staff Overload Enterprises Limited · 1985
- Two-stroke diesel engine55US 6,182,619 B2General Atomics Aeronautical Systems, Inc. · 2001
- Dual compression and dual expansion engine51US 5,623,894 ACaterpillar Inc. · 1997