F16J 15/447
Labyrinth packings
F16J15/447 (Labyrinth packings) appears on 722 US grants and 717 published applications in this corpus.
Search patents in F16J- Granted patents
- 722
- Published applications
- 717
- Assignees
- 315
- Inventors
- 1,498
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 8 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 6 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 8 | 0 |
| 1992 | 3 | 0 |
| 1993 | 8 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 8 | 0 |
| 2000 | 18 | 0 |
| 2001 | 13 | 2 |
| 2002 | 15 | 4 |
| 2003 | 4 | 10 |
| 2004 | 6 | 7 |
| 2005 | 4 | 8 |
| 2006 | 8 | 10 |
| 2007 | 5 | 25 |
| 2008 | 6 | 9 |
| 2009 | 6 | 13 |
| 2010 | 9 | 20 |
| 2011 | 13 | 19 |
| 2012 | 13 | 23 |
| 2013 | 10 | 16 |
| 2014 | 14 | 33 |
| 2015 | 23 | 37 |
| 2016 | 24 | 46 |
| 2017 | 31 | 48 |
| 2018 | 35 | 60 |
| 2019 | 51 | 57 |
| 2020 | 61 | 55 |
| 2021 | 62 | 49 |
| 2022 | 46 | 49 |
| 2023 | 40 | 39 |
| 2024 | 47 | 37 |
| 2025 | 32 | 27 |
| 2026 | 14 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Armament system with a non-rotating slip-fit labyrinth seal8 Sep 2026US 12,729,767 B1The United States of America as represented by the Secretary of the Army
- Sealing ring25 Aug 2026US 12,716,361 B2Industria De Turbo Propulsores, S.A.U.
- Labyrinth seal for rear of internal combustion engine25 Aug 2026US 12,716,504 B1Deere & Company
- Blast furnace distributing device with nitrogen sealing structure4 Aug 2026US 12,698,540 B2
- High pressure gas sealing23 Jun 2026US 12,663,015 B2Dover Pumps & Process Solutions Segment, Inc.
- Seal structure, rotary table device, and machine tool8 Oct 2026US 2026/0309233 A1Fanuc Corporation
- Seal device24 Sep 2026US 2026/0287062 A1Mitsubishi Heavy Industries, Ltd.
- Machine tool control device10 Sep 2026US 2026/0267309 A1Fanuc Corporation
- Shaft Seal Assembly3 Sep 2026US 2026/0258869 A1Inpro/Seal LLC
- Turbomachine compressor exit region seal flow circuit23 Jul 2026US 2026/0210260 A1
Most cited
By later US patents
- Woven seal and hybrid cloth-brush seals for turbine applications79US 5,474,306 AGeneral Electric Company · 1995
- Trenched brush seal75US 5,181,728 AGeneral Electric Company · 1993
- Brush seals and combined labyrinth and brush seals for rotary machines73US 6,131,910 AGeneral Electric Company · 2000
- Sealing rings70US 4,022,479 A1977
- Combined brush seal and labyrinth seal segment for rotary machines69US 5,749,584 AGeneral Electric Company · 1998