Pump for evaporative emissions system
US-12209561-B2 · Jan 28, 2025 · US
the inner and outer member being in contact along more than one line or surface
the inner and outer member being in contact along more than one line or surface · 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 | F04C18/3446 |
| Official title | {the inner and outer member being in contact along more than one line or surface} |
| Display label | the inner and outer member being in contact along more than one line or surface |
| Total patents | 44 |
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 | 12 |
| 2016 | 2 |
| 2017 | 6 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 5 |
| 2022 | 8 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vane pump
US-11873815-B2 · Jan 16, 2024 · US
Rotary compressor with unequally spaced vane slots
US-11732584-B2 · Aug 22, 2023 · US
Vane cell pump
US-11603838-B2 · Mar 14, 2023 · US
Oil supply to the back pressure groove of a vane pump
US-11519270-B2 · Dec 6, 2022 · US
Pump body assembly and compressor
US-11454240-B2 · Sep 27, 2022 · US
Compressor pump body, compressor, and air conditioner with a vane enlargement portion
US-11408287-B2 · Aug 9, 2022 · US
Rotary compressor
US-2022228587-A1 · Jul 21, 2022 · US
Vane pump
US-2022196014-A1 · Jun 23, 2022 · US
Backpressure passage rotary compressor
US-11346221-B2 · May 31, 2022 · US
Vane gas pump with sliding element trmporaily completely covering the elongated fluid outlet opening
US-11261868-B2 · Mar 1, 2022 · US
Oil line structure of compressor and compressor
US-11248609-B2 · Feb 15, 2022 · US
Pump body assembly and compressor with pump body assembly
US-2021270268-A1 · Sep 2, 2021 · US
Compressor pump body, compressor, and air conditioner
US-2021231123-A1 · Jul 29, 2021 · US
Pump Body Assembly and Compressor
US-2021207602-A1 · Jul 8, 2021 · US
Oil Line Structure of Compressor and Compressor
US-2021131437-A1 · May 6, 2021 · US
Vane cell pump
US-2021108634-A1 · Apr 15, 2021 · US
Compressor
US-2020248689-A1 · Aug 6, 2020 · US
Pressure intensifier, arrangement in an aircraft or spacecraft comprising a device driveable by a driving pressure difference, aircraft or spacecraft, and method
US-2020166027-A1 · May 28, 2020 · US
Internal combustion engine
US-10634018-B2 · Apr 28, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C18/3446?
- CPC F04C18/3446 is the Cooperative Patent Classification code for “the inner and outer member being in contact along more than one line or surface.”
- How many patents are filed under CPC F04C18/3446 (the inner and outer member being in contact along more than one line or surface)?
- Our database includes 44 publications tagged with this CPC code.
- Is patent activity under CPC F04C18/3446 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).