F16J 9/22
Rings for preventing wear of grooves or like seatings
F16J9/22 (Rings for preventing wear of grooves or like seatings) appears on 115 US grants and 86 published applications in this corpus.
Search patents in F16J- Granted patents
- 115
- Published applications
- 86
- Assignees
- 85
- Inventors
- 258
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 4 |
| 2005 | 0 | 2 |
| 2006 | 3 | 4 |
| 2007 | 0 | 0 |
| 2008 | 1 | 3 |
| 2009 | 1 | 3 |
| 2010 | 1 | 0 |
| 2011 | 1 | 4 |
| 2012 | 1 | 5 |
| 2013 | 1 | 3 |
| 2014 | 2 | 2 |
| 2015 | 6 | 5 |
| 2016 | 3 | 5 |
| 2017 | 3 | 3 |
| 2018 | 3 | 2 |
| 2019 | 4 | 6 |
| 2020 | 6 | 9 |
| 2021 | 5 | 8 |
| 2022 | 10 | 4 |
| 2023 | 3 | 4 |
| 2024 | 3 | 2 |
| 2025 | 3 | 3 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wear ring and wear ring arrangement29 Sep 2026US 12,747,788 B2Trelleborg Sealing Solutions Germany GmbH
- Anti-friction sealing rings4 Aug 2026US 12,698,829 B2Mainspring Energy, Inc.
- Sealing ring assemblies configured for pressure locking19 May 2026US 12,631,163 B2Mainspring Engergy, Inc.
- Compressor, disc body and seal10 Feb 2026US 12,546,302 B2Neuman & Esser GmbH & Co. KG
- Piston ring and internal combustion engine30 Dec 2025US 12,510,155 B2Mahle International GmbH
- Method for reducing adhesive damage due to loss of lubrication in aerospace piston rings23 Jul 2026US 2026/0210257 A1Rtx Corporation
- Piston ring and method for manufacturing a piston ring19 Feb 2026US 2026/0049659 A1Mahle International GmbH
- Piston assemblies and cylinders that control gas flow5 Feb 2026US 2026/0036202 A1Cummins Inc.
- Sealing ring assemblies configured for pressure locking7 Aug 2025US 2025/0250970 A1Mainspring Energy, Inc.
- Piston ring and internal combustion engine27 Mar 2025US 2025/0102062 A1Mahle International GmbH
Most cited
By later US patents
- Piston for an internal combustion engine and method for producing same38US 4,334,507 AMahle GmbH · 1982
- Composite metal articles29US 4,008,051 ABrico Engineering Limited · 1977
- Method for reinforcing pistons28US 3,947,607 AWellworthy Limited · 1976
- Method of making aluminum piston with reinforced piston ring groove27US 4,125,926 ACaterpillar Tractor Co. · 1978
- Method for manufacturing a forged piston with reinforced ring groove22US 4,364,159 ATRW Inc. · 1982