F16J 9/203
Oil-scraping rings
Official title: {Oil-scraping rings}
F16J9/203 (Oil-scraping rings) appears on 91 US grants and 49 published applications in this corpus.
Search patents in F16J- Granted patents
- 91
- Published applications
- 49
- Assignees
- 42
- Inventors
- 150
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 3 |
| 2003 | 1 | 0 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 0 | 3 |
| 2014 | 1 | 3 |
| 2015 | 1 | 5 |
| 2016 | 3 | 2 |
| 2017 | 7 | 8 |
| 2018 | 3 | 3 |
| 2019 | 6 | 4 |
| 2020 | 1 | 3 |
| 2021 | 4 | 4 |
| 2022 | 2 | 1 |
| 2023 | 3 | 2 |
| 2024 | 2 | 0 |
| 2025 | 2 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Piston ring set28 Jul 2026US 12,692,938 B2
- Oil scraper ring for pistons of an internal combustion engine2 Dec 2025US 12,486,897 B2Federal-Mogul Burscheid GmbH
- Piston ring6 May 2025US 12,292,118 B2Tpr Co., Ltd.
- Combination of piston rings, and combination structure of piston and piston rings4 Jun 2024US 12,000,491 B2Tpr Co., Ltd.
- Cylinder of an internal combustion engine14 May 2024US 11,982,357 B2MAN Energy Solutions SE
- Piston ring set30 Apr 2026US 2026/0117867 A1Riken
- Piston Ring10 Apr 2025US 2025/0116331 A1Tpr Co., Ltd.
- Combination of Piston Rings, and Combination Structure of Piston and Piston Rings9 Nov 2023US 2023/0358313 A1Tpr Co., Ltd.
- Oil scraper ring for pistons of an internal combustion engine20 Jul 2023US 2023/0228329 A1Federal-Mogul Burscheid GmbH
- Piston ring6 Jan 2022US 2022/0003316 A1Nippon Piston Ring Co., Ltd.
Most cited
By later US patents
- Continuous piston rings for an internal combustion engine24US 6,065,438 ACaterpillar Inc. · 2000
- Piston ring employing elastomeric sealing member within the ring groove23US 5,474,307 A1995
- Combined oil ring21US 5,295,696 ATeikoku Piston Ring Co., Ltd. · 1994
- Piston ring having tapered outwardly extending wiper19US 5,253,877 A1993
- Oil ring with coil expander18US 4,522,412 AKeikoku Piston Ring Co., Ltd. · 1985