F16J 9/18
With separate bridge-elements
Official title: with separate bridge-elements
F16J9/18 (With separate bridge-elements) appears on 21 US grants and 22 published applications in this corpus.
Search patents in F16J- Granted patents
- 21
- Published applications
- 22
- Assignees
- 18
- Inventors
- 37
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 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 | 1 | 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 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 1 |
| 2021 | 2 | 3 |
| 2022 | 1 | 4 |
| 2023 | 2 | 1 |
| 2024 | 3 | 2 |
| 2025 | 2 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Piston ring assembly14 Jul 2026US 12,680,613 B2Mahle International GmbH
- Piston sealing ring assembly having a gap cover element24 Feb 2026US 12,560,235 B2Mainspring Energy, Inc.
- Split piston ring unit11 Mar 2025US 12,247,667 B2Mahle International GmbH
- Piston ring for a piston compressor28 Jan 2025US 12,209,670 B2Burckhardt Compression AG
- Piston sealing ring assembly having a gap cover element3 Sep 2024US 12,078,249 B2Mainspring Energy, Inc.
- Piston sealing ring assembly having a gap cover element13 Aug 2026US 2026/0235203 A1Mainspring Energy, Inc.
- Piston ring assembly19 Jun 2025US 2025/0198512 A1Mahle International GmbH
- Piston sealing ring assembly having a gap cover element27 Feb 2025US 2025/0067340 A1Mainspring Energy, Inc.
- Annular seal with interlocked rings2 Jan 2025US 2025/0003349 A1Raytheon Technologies Corporation
- Split piston ring unit14 Nov 2024US 2024/0376981 A1Mahle International GmbH
Most cited
By later US patents
- Split ring seal with slip joint55US 4,759,555 AEG&G Pressure Science, Inc. · 1988
- Thermally expansive slip joint for formed sheet metal seals33US 4,602,795 AUnited Technologies Corporation · 1986
- Gastight piston ring arrangement22US 8,177,237 B2Hoerbiger Kompressortechnik Holding GmbH · 2012
- Piston ring11US 9,133,933 B1Burckhardt Compression AG · 2015
- Stepped joint piston ring9US 4,109,924 AChemprene, Inc. · 1978