A fuel injection arrangement for hand-held powertools
US-2025327433-A1 · Oct 23, 2025 · US
by forming air cushion between charge and combustion residues
by forming air cushion between charge and combustion residues · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F02B25/22 |
| Official title | by forming air cushion between charge and combustion residues |
| Display label | by forming air cushion between charge and combustion residues |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 5 |
| 2017 | 7 |
| 2018 | 9 |
| 2019 | 3 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 6 |
| 2023 | 3 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Engine control device and engine control method
US-2024369027-A1 · Nov 7, 2024 · US
Air-leading type stratified scavenging two-stroke internal combustion engine, and engine working machine
US-11913371-B2 · Feb 27, 2024 · US
Two-stroke engine, and handheld power tool
US-11879381-B2 · Jan 23, 2024 · US
Engine piston, engine, hand-held tool, and method of manufacturing an engine piston
US-11725570-B2 · Aug 15, 2023 · US
Fuel feed unit and two-stroke engine having a fuel feed unit
US-11713738-B2 · Aug 1, 2023 · US
Fuel feed unit and two-stroke engine having a fuel feed unit
US-2023013645-A1 · Jan 19, 2023 · US
Air-leading type stratified scavenging two-stroke internal combustion engine, and engine working machine
US-2022325659-A1 · Oct 13, 2022 · US
Two-Stroke Engine, and Handheld Power Tool
US-2022298961-A1 · Sep 22, 2022 · US
Carburetor and two-stroke engine with a carburetor
US-11441518-B2 · Sep 13, 2022 · US
Engine Piston, Engine, Hand-Held Tool, and Method of Manufacturing an Engine Piston
US-2022049642-A1 · Feb 17, 2022 · US
Carburetor and two-stroke engine with a carburetor
US-2022025837-A1 · Jan 27, 2022 · US
Fuel supply device
US-2022025836-A1 · Jan 27, 2022 · US
Stratified scavenging engine and portable work machine
US-10927789-B2 · Feb 23, 2021 · US
Stratified scavenging engine and portable work machine
US-2020095953-A1 · Mar 26, 2020 · US
Two-stroke internal combustion engine
US-10487721-B2 · Nov 26, 2019 · US
Adjusting of air-fuel ratio of a two-stroke internal combustion engine
US-10196972-B2 · Feb 5, 2019 · US
Suction tube of stratified scavenging engine
US-10197013-B2 · Feb 5, 2019 · US
Stratified scavenging two-stroke internal combustion engine and carburetor thereof
US-10060392-B2 · Aug 28, 2018 · US
Leading-air type two-stroke air-cooled engine
US-10036304-B2 · Jul 31, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02B25/22?
- CPC F02B25/22 is the Cooperative Patent Classification code for “by forming air cushion between charge and combustion residues.”
- How many patents are filed under CPC F02B25/22 (by forming air cushion between charge and combustion residues)?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC F02B25/22 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).