Control of piston trajectory in a linear generator
US-12209548-B2 · Jan 28, 2025 · US
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Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type · 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 | F01B11/00 |
| Official title | Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type |
| Display label | Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type |
| Total patents | 24 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2018 | 2 |
| 2019 | 5 |
| 2020 | 4 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Control of piston trajectory in a linear generator
US-2024125281-A1 · Apr 18, 2024 · US
Opposed, free-piston engine
US-11879338-B2 · Jan 23, 2024 · US
Control of piston trajectory in a linear generator
US-11739705-B2 · Aug 29, 2023 · US
Opposed, free-piston engine
US-2023098581-A1 · Mar 30, 2023 · US
Control of piston trajectory in a linear generator
US-2022381192-A1 · Dec 1, 2022 · US
Control of piston trajectory in a linear generator
US-11339735-B2 · May 24, 2022 · US
Control of piston trajectory in a linear generator
US-2021324812-A1 · Oct 21, 2021 · US
Control of piston trajectory in a linear generator
US-11053876-B2 · Jul 6, 2021 · US
Fuel injection device of engine
US-10914244-B2 · Feb 9, 2021 · US
Control of piston trajectory in a free-piston combustion engine
US-2021010437-A1 · Jan 14, 2021 · US
Free piston engine power plant
US-10871106-B2 · Dec 22, 2020 · US
Control of piston trajectory in a free-piston combustion engine
US-10731586-B2 · Aug 4, 2020 · US
Device and system for monitoring a pneumatically actuated alternating linear displacement pump
US-10626862-B2 · Apr 21, 2020 · US
Free piston device and method for operating a free piston device
US-10612380-B2 · Apr 7, 2020 · US
Free piston device
US-10472995-B2 · Nov 12, 2019 · US
Free piston device and method for operating a free piston device
US-2019085695-A1 · Mar 21, 2019 · US
Fuel injection device of engine
US-2019063338-A1 · Feb 28, 2019 · US
Free Piston Engine Power Plant
US-2019055898-A1 · Feb 21, 2019 · US
Systems and methods for transient control of a free-piston engine
US-10202897-B2 · Feb 12, 2019 · US