Magnetic debris filter for compressor and compressor with magnetic debris filter
US-2026078757-A1 · Mar 19, 2026 · US
of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth equivalents than the outer member
of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth equivalents than the outer 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 | F04C18/22 |
| Official title | of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth equivalents than the outer member |
| Display label | of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth equivalents than the outer member |
| Total patents | 42 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 1 |
| 2017 | 3 |
| 2018 | 1 |
| 2019 | 1 |
| 2021 | 7 |
| 2022 | 5 |
| 2023 | 7 |
| 2024 | 7 |
| 2025 | 4 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Oil separator for compressor and compressor with oil separator
US-2026078758-A1 · Mar 19, 2026 · US
Rotary compressor and refrigeration apparatus including the same
US-2025347278-A1 · Nov 13, 2025 · US
Non-lubricated compressor with abradable sealing element and related method for assembling it
US-12345262-B2 · Jul 1, 2025 · US
Rotary compressor
US-12313073-B2 · May 27, 2025 · US
Pump body assembly, fluid machinery, and heat exchange device
US-12286972-B2 · Apr 29, 2025 · US
Non-lubricated compressor with abradable sealing element and related method for assembling it
US-2024426300-A1 · Dec 26, 2024 · US
Pump body assembly and fluid machine
US-12158139-B2 · Dec 3, 2024 · US
Fluid transfer apparatus
US-12158149-B2 · Dec 3, 2024 · US
Rotary compressor
US-2024344518-A1 · Oct 17, 2024 · US
Compressible fluid separator pump
US-12036507-B2 · Jul 16, 2024 · US
Pump body assembly, heat exchange apparatus, fluid machine and operating method thereof
US-11971031-B2 · Apr 30, 2024 · US
Fluid transfer apparatus with a plurality of rotor housings arranged at different angularity with the neighboring rotor housings
US-11867179-B2 · Jan 9, 2024 · US
Rotary piston compressor and system for temperature conditioning with rotary piston compressor
US-11841019-B2 · Dec 12, 2023 · US
Liquid blade pump
US-2023296095-A1 · Sep 21, 2023 · US
Liquid blade pump
US-2023279875-A1 · Sep 7, 2023 · US
Compressible fluid separator pump
US-2023256383-A1 · Aug 17, 2023 · US
Pump having liquid blades and an associated method of pumping
US-11719244-B2 · Aug 8, 2023 · US
Pump body assembly and fluid machine
US-2023160376-A1 · May 25, 2023 · US
Fluid transfer device
US-11629712-B2 · Apr 18, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C18/22?
- CPC F04C18/22 is the Cooperative Patent Classification code for “of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth equivalents than the outer member.”
- How many patents are filed under CPC F04C18/22 (of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth equivalents than the outer member)?
- Our database includes 42 publications tagged with this CPC code.
- Is patent activity under CPC F04C18/22 growing?
- Publication counts under this code: 7 in 2024 vs 4 in 2025 (latest complete years).