F16J 9/24
Members preventing rotation of rings in grooves
F16J9/24 (Members preventing rotation of rings in grooves) appears on 32 US grants and 24 published applications in this corpus.
Search patents in F16J- Granted patents
- 32
- Published applications
- 24
- Assignees
- 34
- Inventors
- 77
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 1 | 2 |
| 2015 | 2 | 2 |
| 2016 | 0 | 1 |
| 2017 | 2 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 2 |
| 2020 | 2 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 5 |
| 2025 | 3 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Seal assembly with anti-rotation feature25 Aug 2026US 12,716,490 B2Pratt & Whitney Canada Corp.
- Compressor20 Jan 2026US 12,529,375 B2Hitachi Industrial Equipment Systems Co., Ltd.
- Piston ring and booster pump22 Apr 2025US 12,281,709 B2Mitsubishi Heavy Industries, Ltd.
- Split piston ring unit11 Mar 2025US 12,247,667 B2Mahle International GmbH
- Piston ring for a piston compressor28 Jan 2025US 12,209,670 B2Burckhardt Compression AG
- Piston ring assembly19 Jun 2025US 2025/0198513 A1Mahle International GmbH
- Compressor12 Jun 2025US 2025/0188921 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Split piston ring unit14 Nov 2024US 2024/0376981 A1Mahle International GmbH
- Piston ring with integrated anti-rotation feature17 Oct 2024US 2024/0344607 A1Pratt & Whitney Canada Corp.
- Piston ring and booster pump10 Oct 2024US 2024/0337316 A1Mitsubishi Heavy Industries, Ltd.
Most cited
By later US patents
- Self-locating piston ring for a two-stroke engine15US 5,664,536 ABrunswick Corporation · 1997
- Seal assembly14US 6,378,872 B12002
- Mounting structure of a multiple piston ring12US 4,962,691 A1990
- Piston of composite material with C-shaped ring groove12US 5,117,742 AIwata Air Compressor Mfg. Co., Ltd. · 1992
- Piston ring locator12US 6,457,721 B1White Consolidated Industries, Inc. · 2002