Hydrostatic radial piston unit
US-12523201-B2 · Jan 13, 2026 · US
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of internal axis type
of internal axis 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 | F04C2/04 |
| Official title | of internal axis type |
| Display label | of internal axis type |
| Total patents | 21 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2017 | 1 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 1 |
| 2022 | 3 |
| 2023 | 7 |
| 2024 | 2 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Radial piston pump
US-2025320868-A1 · Oct 16, 2025 · US
Compressor unit and refrigeration apparatus
US-2024263631-A1 · Aug 8, 2024 · US
Compressor modulation system with multi-way valve
US-11879460-B2 · Jan 23, 2024 · US
Motor-integrated fluid machine
US-11821428-B2 · Nov 21, 2023 · US
Scroll assembly and scroll compressor
US-11746779-B2 · Sep 5, 2023 · US
Motor-Integrated Fluid Machine
US-2023184252-A1 · Jun 15, 2023 · US
Compressor modulation system with multi-way valve
US-11655813-B2 · May 23, 2023 · US
Scroll assembly and scroll compressor
US-2023063530-A1 · Mar 2, 2023 · US
Compressor Modulation System With Multi-Way Valve
US-2023055642-A1 · Feb 23, 2023 · US
Compressor Modulation System With Multi-Way Valve
US-2023036027-A1 · Feb 2, 2023 · US
Motor-driven compressor and method of assembling motor-driven compressor
US-11437882-B2 · Sep 6, 2022 · US
Compressor having external temperature sensor and method of manufacturing compressor
US-11261866-B2 · Mar 1, 2022 · US
Rotary device and power transmission device
US-2022010794-A1 · Jan 13, 2022 · US
Compressor and method of manufacturing compressor
US-2021310489-A1 · Oct 7, 2021 · US
Motor-driven compressor and method of assembling motor-driven compressor
US-2020343783-A1 · Oct 29, 2020 · US
Scroll compressor
US-2020025197-A1 · Jan 23, 2020 · US
Screw Compressor for a Utility Vehicle
US-2019309747-A1 · Oct 10, 2019 · US
Pump device
US-2019277280-A1 · Sep 12, 2019 · US
Hydraulic motor-pump with fixed or variable displacement
US-9546654-B2 · Jan 17, 2017 · US