F16J 9/068
Corrugated in the axial direction
Official title: {corrugated in the axial direction}
F16J9/068 (Corrugated in the axial direction) appears on 52 US grants and 49 published applications in this corpus.
Search patents in F16J- Granted patents
- 52
- Published applications
- 49
- Assignees
- 20
- Inventors
- 124
- Latest grant
- 19 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 4 |
| 2007 | 1 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 2 |
| 2010 | 2 | 0 |
| 2011 | 0 | 2 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 5 |
| 2015 | 0 | 4 |
| 2016 | 4 | 0 |
| 2017 | 5 | 6 |
| 2018 | 2 | 4 |
| 2019 | 4 | 3 |
| 2020 | 4 | 4 |
| 2021 | 3 | 3 |
| 2022 | 2 | 2 |
| 2023 | 2 | 1 |
| 2024 | 6 | 3 |
| 2025 | 1 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Piston unit, top land member, and combination of piston unit parts19 Aug 2025US 12,392,301 B2Tpr Co., Ltd.
- Oil control ring10 Dec 2024US 12,163,592 B2Federal-Mogul Burscheid GmbH
- Dynamic axial seal systems and methods8 Oct 2024US 12,110,967 B2OneSubsea IP UK Limited
- Piston ring combination, and internal combustion engine17 Sep 2024US 12,092,222 B2Tpr Co., Ltd.
- Side rail and oil control ring comprising same28 May 2024US 11,994,219 B2
- Piston ring set30 Apr 2026US 2026/0117867 A1Riken
- Piston Unit, Top Land Member, and Combination of Piston Unit Parts3 Apr 2025US 2025/0109722 A1Tpr Co., Ltd.
- Piston ring and piston ring set13 Feb 2025US 2025/0052320 A1Riken
- Piston Ring Combination, and Internal Combustion Engine8 Aug 2024US 2024/0263700 A1Tpr Co., Ltd.
- Dynamic axial seal systems and methods4 Jul 2024US 2024/0218931 A1OneSubsea IP UK Limited
Most cited
By later US patents
- Spacer and expander member for holding and biasing piston ring rails21US 4,429,885 ARiken · 1984
- Piston ring assembly for automotive internal combustion engine21US 4,475,739 ANissan Motor Co., Ltd. · 1984
- Three-piece oil control ring assembly19US 5,195,758 AHastings Manufacturing Company · 1993
- Three-piece oil ring and combination of the three-piece oil ring and piston17US 7,854,191 B2Nippon Piston Ring Co., Ltd. · 2010
- Steel oil ring assembly14US 5,129,661 ARiken · 1992