B61F 15/22
Sealing means preventing entrance of dust or leakage of oil
B61F15/22 (Sealing means preventing entrance of dust or leakage of oil) appears on 50 US grants and 43 published applications in this corpus.
Search patents in B61F- Granted patents
- 50
- Published applications
- 43
- Assignees
- 22
- Inventors
- 75
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 3 |
| 2007 | 1 | 0 |
| 2008 | 1 | 0 |
| 2009 | 1 | 3 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 2 | 3 |
| 2013 | 1 | 2 |
| 2014 | 3 | 4 |
| 2015 | 4 | 2 |
| 2016 | 4 | 3 |
| 2017 | 1 | 1 |
| 2018 | 0 | 2 |
| 2019 | 3 | 9 |
| 2020 | 4 | 2 |
| 2021 | 7 | 2 |
| 2022 | 1 | 2 |
| 2023 | 1 | 1 |
| 2024 | 2 | 0 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Backing ring assembly for railway axles10 Feb 2026US 12,545,301 B2Aktiebolaget Skf
- Universal backing ring25 Mar 2025US 12,258,052 B2A. Stucki Company
- Universal fit backing ring assembly for railway axles26 Nov 2024US 12,151,719 B2Aktiebolaget Skf
- Sealing device5 Mar 2024US 11,920,636 B2Nok Corporation
- Adapter assembly of generator and axle-end generator assembly21 Feb 2023US 11,584,401 B2Schaeffler Technologies AG & Co. KG
- Universal backing ring19 Jun 2025US 2025/0196898 A1A. Stucki Company
- Backing ring assembly for railway axles5 Jan 2023US 2023/0001965 A1Aktiebolaget Skf
- Universal backing ring29 Dec 2022US 2022/0410947 A1A. Stucki Company
- Universal fit backing ring assembly for railway axles15 Sep 2022US 2022/0289256 A1Aktiebolaget Skf
- Sealing device4 Nov 2021US 2021/0341018 A1Nok Corporation
Most cited
By later US patents
- Bearing seal with oil deflectors45US 5,511,886 ABrenco, Incorporated · 1996
- Hydrodynamic seal44US 4,770,548 AThe Timken Company · 1988
- Compact seal41US 4,799,808 AThe Timken Company · 1989
- Compact labyrinth-type seal31US 4,770,424 AThe Timken Company · 1988
- Shielded seal assembly29US 4,819,949 AThe Timken Company · 1989