Oil-Free Air Compressor
US-2025101984-A1 · Mar 27, 2025 · US
of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member
of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member · 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 | F04C18/10 |
| Official title | of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member |
| Display label | of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member |
| Total patents | 38 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 7 |
| 2017 | 2 |
| 2018 | 5 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 1 |
| 2022 | 5 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Compressor assembly
US-2024360830-A1 · Oct 31, 2024 · US
Electronic positive displacement fluid pump with motor cooling and air purging
US-2024328415-A1 · Oct 3, 2024 · US
Scroll compressor and refrigeration cycle apparatus
US-11933306-B2 · Mar 19, 2024 · US
Stacked gerotor pump pressure pulsation reduction
US-11795948-B2 · Oct 24, 2023 · US
Hermetic compressor including an intermediate plate having a curved suction passage
US-11754071-B2 · Sep 12, 2023 · US
Stacked gerotor pump pressure pulsation reduction
US-2023235737-A1 · Jul 27, 2023 · US
Pump system and method for optimized torque requirements and volumetric efficiencies
US-11661938-B2 · May 30, 2023 · US
Pump system and method for optimized torque requirements and volumetric efficiencies
US-2023062955-A1 · Mar 2, 2023 · US
Rotary pump
US-2022389925-A1 · Dec 8, 2022 · US
Compressor having oil guide path
US-11434888-B2 · Sep 6, 2022 · US
Cylindrical symmetric volumetric machine
US-11384762-B2 · Jul 12, 2022 · US
Scroll compressor and refrigeration cycle apparatus
US-2022154719-A1 · May 19, 2022 · US
Hermetic compressor
US-2022025886-A1 · Jan 27, 2022 · US
Hermetic compressor having inlet port arrangement including a suction passage defined in an intermediate plate
US-11174865-B2 · Nov 16, 2021 · US
Scroll compressor
US-2020248692-A1 · Aug 6, 2020 · US
Cylindrical symmetric volumetric machine
US-2020217320-A1 · Jul 9, 2020 · US
Compressor
US-2020088180-A1 · Mar 19, 2020 · US
Electric pump
US-2019353168-A1 · Nov 21, 2019 · US
Arrangement for specifying a pressure
US-10480505-B2 · Nov 19, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C18/10?
- CPC F04C18/10 is the Cooperative Patent Classification code for “of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member.”
- How many patents are filed under CPC F04C18/10 (of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC F04C18/10 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).