Backing ring assembly for railway axles
US-12545301-B2 · Feb 10, 2026 · US
Sealing means preventing entrance of dust or leakage of oil
Sealing means preventing entrance of dust or leakage of oil · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B61F15/22 |
| Official title | Sealing means preventing entrance of dust or leakage of oil |
| Display label | Sealing means preventing entrance of dust or leakage of oil |
| Total patents | 49 |
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 | 6 |
| 2016 | 4 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 13 |
| 2020 | 7 |
| 2021 | 7 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Universal fit backing ring assembly for railway axles
US-12151719-B2 · Nov 26, 2024 · US
Sealing device
US-11920636-B2 · Mar 5, 2024 · US
Adapter assembly of generator and axle-end generator assembly
US-11584401-B2 · Feb 21, 2023 · US
Backing ring assembly for railway axles
US-2023001965-A1 · Jan 5, 2023 · US
Temperature-robust polymer shroud for roller bearing seal
US-11506243-B2 · Nov 22, 2022 · US
Universal fit backing ring assembly for railway axles
US-2022289256-A1 · Sep 15, 2022 · US
Insert and wear ring for a railway roller bearing
US-11220279-B2 · Jan 11, 2022 · US
Bearing housing, and bogie for rail vehicles comprising a housing of this kind
US-11186299-B2 · Nov 30, 2021 · US
Sealing device
US-2021341018-A1 · Nov 4, 2021 · US
Adapter assembly of generator and axle-end generator assembly
US-2021323586-A1 · Oct 21, 2021 · US
Railcar adapter for connecting a railcar body to a bearing
US-11052928-B2 · Jul 6, 2021 · US
Railcar adapter for connecting a railcar body to a bearing
US-10974742-B2 · Apr 13, 2021 · US
Railcar adapter for connecting a railcar body to a bearing
US-10974740-B2 · Apr 13, 2021 · US
Railcar adapter for connecting a railcar body to a bearing
US-10960904-B2 · Mar 30, 2021 · US
Bearing device for axle
US-10851839-B2 · Dec 1, 2020 · US
Temperature-Robust Polymer Shroud For Roller Bearing Seal
US-2020340719-A1 · Oct 29, 2020 · US
Temperature-robust polymer shroud for roller bearing seal
US-10746228-B2 · Aug 18, 2020 · US
Box type sealing structure and conical roller bearing
US-10731706-B2 · Aug 4, 2020 · US
Roller bearing seal assembly and a component thereof
US-10711842-B2 · Jul 14, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B61F15/22?
- CPC B61F15/22 is the Cooperative Patent Classification code for “Sealing means preventing entrance of dust or leakage of oil.”
- How many patents are filed under CPC B61F15/22 (Sealing means preventing entrance of dust or leakage of oil)?
- Our database includes 49 publications tagged with this CPC code.
- Is patent activity under CPC B61F15/22 growing?
- Publication counts under this code: 2 in 2023 vs 2 in 2024 (latest complete years).