F02B 25/22
By forming air cushion between charge and combustion residues
Official title: by forming air cushion between charge and combustion residues
F02B25/22 (By forming air cushion between charge and combustion residues) appears on 198 US grants and 179 published applications in this corpus.
Search patents in F02B- Granted patents
- 198
- Published applications
- 179
- Assignees
- 55
- Inventors
- 283
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 7 | 5 |
| 2002 | 11 | 12 |
| 2003 | 17 | 14 |
| 2004 | 5 | 12 |
| 2005 | 18 | 11 |
| 2006 | 12 | 17 |
| 2007 | 8 | 15 |
| 2008 | 13 | 13 |
| 2009 | 13 | 13 |
| 2010 | 9 | 6 |
| 2011 | 5 | 8 |
| 2012 | 8 | 11 |
| 2013 | 7 | 7 |
| 2014 | 11 | 6 |
| 2015 | 4 | 6 |
| 2016 | 4 | 4 |
| 2017 | 5 | 4 |
| 2018 | 10 | 3 |
| 2019 | 3 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 5 |
| 2023 | 3 | 2 |
| 2024 | 2 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Air-leading type stratified scavenging two-stroke internal combustion engine, and engine working machine27 Feb 2024US 11,913,371 B2Yamabiko Corporation
- Two-stroke engine, and handheld power tool23 Jan 2024US 11,879,381 B2Husqvarna AB
- Engine piston, engine, hand-held tool, and method of manufacturing an engine piston15 Aug 2023US 11,725,570 B2Husqvarna AB
- Fuel feed unit and two-stroke engine having a fuel feed unit1 Aug 2023US 11,713,738 B2Andreas Stihl AG & CO.KG
- Two-stroke engine and handheld work apparatus23 Jul 2026US 2026/0210286 A1Andreas Stihl AG & CO.KG
- A fuel injection arrangement for hand-held powertools23 Oct 2025US 2025/0327433 A1Husqvarna AB
- Engine control device and engine control method7 Nov 2024US 2024/0369027 A1Yamabiko Corporation
- Rotary type carburetor for stratefied scavenging engine14 Sep 2023US 2023/0287849 A1Zama Japan Kabushiki Kaisha
- Fuel feed unit and two-stroke engine having a fuel feed unit19 Jan 2023US 2023/0013645 A1Andreas Stihl AG & CO.KG
Most cited
By later US patents
- Stratified-charge two-stroke internal combustion engines42US 4,253,433 AThe Queen's University of Belfast · 1981
- Stratified scavenging two-cycle engine39US 6,216,650 B1Komatsu Zenoah Co. · 2001
- Continuously variable volume scavenging passage for two-stroke engines37US 5,379,732 A1995
- Stratified scavenging two-cycle engine33US 6,112,708 AKomatsu Zenoah Co. · 2000
- Crankcase scavenged two-stroke engines32US 6,101,991 ARicardo Consulting Engineers Limited · 2000