F16J 9/04
Helical rings
F16J9/04 (Helical rings) appears on 9 US grants and 8 published applications in this corpus.
Search patents in F16J- Granted patents
- 9
- Published applications
- 8
- Assignees
- 10
- Inventors
- 20
- Latest grant
- 1 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 2 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 2 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Helical dynamic seal ring1 Jul 2025US 12,344,369 B2Goodrich Corporation
- Dynamic axial seal systems and methods8 Oct 2024US 12,110,967 B2OneSubsea IP UK Limited
- Seal chain15 Nov 2022US 11,499,605 B2Tsubakimoto Chain Co.
- Stamp-sealing unit and ultrasonic processing device comprising same27 Aug 2019US 10,393,152 B2Herrmann Ultraschalltechnik GmbH & Co. KG
- Valve having double wound lamellar ring3 Jul 2007US 7,237,761 B2Siemens Aktiengesellschaft
- Helical dynamic seal ring7 Nov 2024US 2024/0367783 A1Goodrich Corporation
- Dynamic axial seal systems and methods4 Jul 2024US 2024/0218931 A1OneSubsea IP UK Limited
- Seal chain16 Sep 2021US 2021/0285516 A1Tsubakimoto Chain Co.
- A seal for barrel shaped cylinder14 Mar 2019US 2019/0076929 A1Neo Mechanics Limited
- Stamp-Sealing Unit and Ultrasonic Processing Device Comprising Same14 Mar 2019US 2019/0078591 A1Herrmann Ultraschalltechnik GmbH & Co. KG
Most cited
By later US patents
- Expanding helical seal for pistons and the like10US 4,333,661 AHughes Aircraft Company · 1982
- Spiral piston ring with tapered ends and recesses8US 4,576,381 ARix Industries · 1986
- Valve having double wound lamellar ring5US 7,237,761 B2Siemens Aktiengesellschaft · 2007
- Pressure sealing device for the gap between two coaxial cylindrical surfaces3US 5,029,880 AVolvo Hydraulik AB · 1991
- Piston ring structure2US 3,949,997 A1976