F16J 9/065
Spring expander with massive cross-section
Official title: {Spring expander with massive cross-section}
F16J9/065 (Spring expander with massive cross-section) appears on 8 US grants and 3 published applications in this corpus.
Search patents in F16J- Granted patents
- 8
- Published applications
- 3
- Assignees
- 5
- Inventors
- 14
- Latest grant
- 3 May 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 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 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Piston ring combination3 May 2022US 11,320,049 B2Tpr Co., Ltd.
- Combined oil control ring16 Jul 2019US 10,352,446 B2Riken
- Combined oil control ring11 Apr 2017US 9,618,115 B2Riken
- Oil scraper ring for pistons of internal combustion engines8 Jul 2008US 7,396,018 B1Mahle GmbH
- Oil sealing ring16 Jul 2002US 6,419,234 B1
Most cited
By later US patents
- Piston construction5US 4,079,661 ACaterpillar Tractor Co. · 1978
- Two-piece type oil ring assembly5US 5,052,698 ANippon Piston Ring Co., Ltd. · 1991
- Oil sealing ring4US 6,419,234 B12002
- Oil scraper ring for pistons of internal combustion engines4US 7,396,018 B1Mahle GmbH · 2008
- Three-piece type oil ring assembly2US 5,193,820 ANippon Piston Ring Co., Ltd. · 1993