F16J 9/062
Coiled spring along the entire circumference
Official title: {Coiled spring along the entire circumference}
F16J9/062 (Coiled spring along the entire circumference) appears on 72 US grants and 58 published applications in this corpus.
Search patents in F16J- Granted patents
- 72
- Published applications
- 58
- Assignees
- 41
- Inventors
- 152
- Latest grant
- 24 Dec 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 2 |
| 2003 | 4 | 4 |
| 2004 | 3 | 3 |
| 2005 | 1 | 0 |
| 2006 | 1 | 4 |
| 2007 | 3 | 2 |
| 2008 | 1 | 2 |
| 2009 | 1 | 2 |
| 2010 | 1 | 3 |
| 2011 | 1 | 1 |
| 2012 | 0 | 4 |
| 2013 | 3 | 10 |
| 2014 | 2 | 3 |
| 2015 | 4 | 1 |
| 2016 | 4 | 2 |
| 2017 | 1 | 3 |
| 2018 | 5 | 3 |
| 2019 | 2 | 0 |
| 2020 | 0 | 2 |
| 2021 | 1 | 3 |
| 2022 | 2 | 0 |
| 2023 | 1 | 1 |
| 2024 | 2 | 1 |
| 2025 | 0 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Oil control ring24 Dec 2024US 12,173,799 B2Tpr Co., Ltd.
- Cylinder of an internal combustion engine14 May 2024US 11,982,357 B2MAN Energy Solutions SE
- Piston having oil return passage19 Dec 2023US 11,846,351 B2Mahle Automotive Technologies (China) Co., Ltd.
- Oil ring for internal combustion engine and piston assembly including the same12 Jul 2022US 11,384,837 B2Samyoung Machinery Co., Ltd.
- Piston for an internal combustion engine15 Mar 2022US 11,274,747 B2Mahle International GmbH
- Oil control ring26 Feb 2026US 2026/0055813 A1Riken
- Oil ring and method for manufacturing oil ring2 Oct 2025US 2025/0305582 A1Nippon Piston Ring Co., Ltd.
- Oil control ring2 May 2024US 2024/0141993 A1Tpr Co., Ltd.
- Piston with oil return passage and engine11 May 2023US 2023/0145204 A1Mahle Automotive Technologies (China) Co., Ltd.
- Oil ring for internal combustion engine and piston assembly including the same9 Dec 2021US 2021/0381596 A1Samyoung Machinery Co., Ltd.
Most cited
By later US patents
- Cryogenic refrigerator and regenerative heat exchange material23US 5,447,034 AKabushiki Kaisha Toshiba · 1995
- Combined oil ring21US 5,295,696 ATeikoku Piston Ring Co., Ltd. · 1994
- Spring loaded guide ring20US 4,906,109 A1990
- Oil ring with coil expander18US 4,522,412 AKeikoku Piston Ring Co., Ltd. · 1985
- Piston ring structural body and method of mounting the piston ring structural body17US 6,283,478 B1Teikoku Piston Ring Co., Ltd. · 2001