F16J 9/08
Piston-rings: with expansion obtained by pressure of the medium
Official title: with expansion obtained by pressure of the medium
F16J9/08 (Piston-rings: with expansion obtained by pressure of the medium) appears on 62 US grants and 56 published applications in this corpus.
Search patents in F16J- Granted patents
- 62
- Published applications
- 56
- Assignees
- 47
- Inventors
- 90
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 4 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 2 | 1 |
| 2011 | 0 | 2 |
| 2012 | 1 | 0 |
| 2013 | 1 | 2 |
| 2014 | 2 | 1 |
| 2015 | 2 | 7 |
| 2016 | 3 | 7 |
| 2017 | 5 | 4 |
| 2018 | 5 | 2 |
| 2019 | 4 | 5 |
| 2020 | 3 | 6 |
| 2021 | 3 | 3 |
| 2022 | 4 | 2 |
| 2023 | 1 | 3 |
| 2024 | 3 | 3 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Piston seal ring10 Mar 2026US 12,571,472 B2Rtx Corporation
- Piston ring for a piston compressor28 Jan 2025US 12,209,670 B2Burckhardt Compression AG
- Working cylinder with end position damping, and damping piston ring20 Aug 2024US 12,066,040 B2BüMach Engineering International B. V.
- Piston ring20 Aug 2024US 12,066,110 B2BüMach Engineering International B. V.
- Open-faced piston assembly2 Apr 2024US 11,946,435 B2Mainspring Energy, Inc.
- Pressure boosting pump and hydrogen supply system18 Dec 2025US 2025/0383047 A1Mitsubishi Heavy Industries, Ltd.
- Anti-friction sealing rings20 Mar 2025US 2025/0092951 A1Mainspring Energy, Inc.
- Piston Seal Ring7 Mar 2024US 2024/0077031 A1Rtx Corporation
- Combination Piston and Piston Ring for Reduction of Crevice Volume7 Mar 2024US 2024/0077137 A1LiquidPiston, Inc.
- Piston ring for a piston compressor8 Feb 2024US 2024/0044407 A1Burckhardt Compression AG
Most cited
By later US patents
- Fluid servo and applications57US 8,863,641 B2Isentropic Limited · 2014
- Seal mechanism for a Stirling engine33US 4,736,586 AMitsubishi Denki Kabushiki Kaisha · 1988
- Seal for a rolling cone cutter earth boring bit29US 4,179,003 ADresser Industries, Inc. · 1979
- Uniform load piston ring23US 4,289,264 AThe United States of America as represented by the Secretary of the Air Force · 1981
- Piston assembly for stirling engine19US 5,865,091 ASTM Corporation · 1999