Crankcase scavenged two-stroke engine and handheld power tool
US-2026092554-A1 · Apr 2, 2026 · US
using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke
using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke · 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 | F02B25/14 |
| Official title | using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke |
| Display label | using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke |
| Total patents | 56 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 8 |
| 2017 | 7 |
| 2018 | 6 |
| 2019 | 5 |
| 2020 | 5 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 10 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Two-stroke engine
US-2026092553-A1 · Apr 2, 2026 · US
Air intake-type two-stroke engine
US-2025207527-A1 · Jun 26, 2025 · US
Two-stroke engine
US-12098669-B2 · Sep 24, 2024 · US
Schnuerle scavenging two-stroke engine
US-11828221-B2 · Nov 28, 2023 · US
Two-stroke engine
US-2023265781-A1 · Aug 24, 2023 · US
Fuel feed unit and two-stroke engine having a fuel feed unit
US-11713738-B2 · Aug 1, 2023 · US
Schnuerle scavenging two-stroke engine
US-2023193811-A1 · Jun 22, 2023 · US
Two-cycle engine
US-11624337-B2 · Apr 11, 2023 · US
Two-stroke internal combustion engine
US-11598247-B2 · Mar 7, 2023 · US
Two-cycle engine
US-2023036494-A1 · Feb 2, 2023 · US
Fuel feed unit and two-stroke engine having a fuel feed unit
US-2023013645-A1 · Jan 19, 2023 · US
Two-stroke engine
US-2023017963-A1 · Jan 19, 2023 · US
Two-stroke engine
US-11549430-B1 · Jan 10, 2023 · US
Mixture formation unit and two stroke engine having a mixture formation unit
US-11384715-B2 · Jul 12, 2022 · US
Two-stroke internal combustion engine
US-2022154629-A1 · May 19, 2022 · US
Two-stroke internal combustion engine
US-11149676-B2 · Oct 19, 2021 · US
Stratified scavenging engine and portable work machine
US-10927789-B2 · Feb 23, 2021 · US
Mixture formation unit and two stroke engine having a mixture formation unit
US-2020386192-A1 · Dec 10, 2020 · US
Exhaust-tuning port and timing and combustion chamber shape
US-10648399-B2 · May 12, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02B25/14?
- CPC F02B25/14 is the Cooperative Patent Classification code for “using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke.”
- How many patents are filed under CPC F02B25/14 (using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke)?
- Our database includes 56 publications tagged with this CPC code.
- Is patent activity under CPC F02B25/14 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).