F16J 15/43
Kept in sealing position by magnetic force
Official title: kept in sealing position by magnetic force
F16J15/43 (Kept in sealing position by magnetic force) appears on 261 US grants and 125 published applications in this corpus.
Search patents in F16J- Granted patents
- 261
- Published applications
- 125
- Assignees
- 112
- Inventors
- 403
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 6 | 0 |
| 1982 | 7 | 0 |
| 1983 | 5 | 0 |
| 1984 | 10 | 0 |
| 1985 | 11 | 0 |
| 1986 | 10 | 0 |
| 1987 | 9 | 0 |
| 1988 | 7 | 0 |
| 1989 | 10 | 0 |
| 1990 | 9 | 0 |
| 1991 | 14 | 0 |
| 1992 | 12 | 0 |
| 1993 | 5 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 1 |
| 2002 | 2 | 0 |
| 2003 | 4 | 3 |
| 2004 | 9 | 4 |
| 2005 | 3 | 2 |
| 2006 | 3 | 5 |
| 2007 | 2 | 6 |
| 2008 | 2 | 4 |
| 2009 | 1 | 3 |
| 2010 | 3 | 6 |
| 2011 | 2 | 11 |
| 2012 | 2 | 5 |
| 2013 | 6 | 6 |
| 2014 | 2 | 2 |
| 2015 | 4 | 8 |
| 2016 | 2 | 8 |
| 2017 | 12 | 11 |
| 2018 | 8 | 6 |
| 2019 | 5 | 4 |
| 2020 | 3 | 4 |
| 2021 | 11 | 6 |
| 2022 | 13 | 7 |
| 2023 | 3 | 3 |
| 2024 | 1 | 7 |
| 2025 | 5 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Anti-nuclear radiation magnetic fluid sealing device9 Jun 2026US 12,651,675 B2Beijing Jiaotong University
- Device sealed with magnetic liquid3 Mar 2026US 12,565,931 B2Beijing Jiaotong University
- Magnetic fluid sealed shaft assembly, shielded motor, and shielded pump7 Oct 2025US 12,438,411 B2Shenyang Anti-Corrosion Alloy Pump CO., LTD.
- Wellbore exclusion fluid method and apparatus for downhole logging26 Aug 2025US 12,398,608 B2Halliburton Energy Services.Inc.
- Self-cooling device sealed with magnetic liquid29 Apr 2025US 12,287,035 B2Beijing Jiaotong University
- Wellbore exclusion fluid method and apparatus for downhole logging20 Nov 2025US 2025/0354446 A1Halliburton Energy Services.Inc.
- Rotating-shaft seal and vacuum type component transfer apparatus using the same3 Jul 2025US 2025/0215980 A1Sealink Corp.
- Anti-nuclear radiation magnetic fluid sealing device27 Mar 2025US 2025/0104881 A1Beijing Jiaotong University
- Fishing reel7 Nov 2024US 2024/0365764 A1Globeride, Inc.
- Magnetic fluid seal30 May 2024US 2024/0175495 A1Magnex Corporation
Most cited
By later US patents
- Apparatus and method for noise attenuation in a speech recognition system205US 6,768,979 B1Sony Corporation · 2004
- Device for the axial transport of fluid media173US 6,719,791 B1Berlin Heart GmbH · 2004
- Electroactive fluid torque transmission apparatus with ferrofluid seal73US 5,007,513 ALord Corporation · 1991
- Automobile tire pneumatic pressure controlling apparatus64US 4,844,138 AKabushiki Kaisha Tokai Rika Denki Seisakusho · 1989
- Magnetic fluid sealing device63US 5,826,885 ARigaku/USA, Inc. · 1998