F15B 15/1452
Piston sealings
Official title: {Piston sealings}
F15B15/1452 (Piston sealings) appears on 121 US grants and 148 published applications in this corpus.
Search patents in F15B- Granted patents
- 121
- Published applications
- 148
- Assignees
- 100
- Inventors
- 288
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 3 |
| 2003 | 2 | 0 |
| 2004 | 1 | 1 |
| 2005 | 2 | 3 |
| 2006 | 2 | 2 |
| 2007 | 1 | 2 |
| 2008 | 1 | 8 |
| 2009 | 2 | 0 |
| 2010 | 3 | 7 |
| 2011 | 0 | 6 |
| 2012 | 2 | 7 |
| 2013 | 4 | 4 |
| 2014 | 3 | 4 |
| 2015 | 4 | 5 |
| 2016 | 6 | 10 |
| 2017 | 3 | 9 |
| 2018 | 11 | 7 |
| 2019 | 8 | 12 |
| 2020 | 11 | 11 |
| 2021 | 7 | 8 |
| 2022 | 12 | 4 |
| 2023 | 3 | 16 |
| 2024 | 6 | 10 |
| 2025 | 14 | 6 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Piston ring seal with reduced stiction18 Aug 2026US 12,710,063 B2
- Constant pressure generating system7 Jul 2026US 12,674,497 B2White's Welding, LLC
- Force overshoot and other pressure disturbance mitigation in pneumatic force control devices21 Apr 2026US 12,605,849 B2ATI Industrial Automation, Inc.
- Stability and control augmentation system actuator10 Mar 2026US 12,570,393 B2Microtecnica S.R.L.
- Oil leak mitigation for hydraulic systems30 Dec 2025US 12,510,109 B2J. E. Myles, Inc. Control Power Division
- Constant pressure generating system24 Sep 2026US 2026/0287034 A1White's Welding, LLC
- Hydraulic power tool with piston seals14 May 2026US 2026/0132804 A1
- Retraction mechanism and dimension-measuring device provided with same16 Apr 2026US 2026/0104063 A1Tokyo Seimitsu Co., Ltd.
- Internal floating piston11 Dec 2025US 2025/0376994 A1Fox Factory, Inc.
- Working cylinder with pressure medium overflow1 May 2025US 2025/0137473 A1BüMach Engineering International B. V.
Most cited
By later US patents
- Fluid pressure cylinder apparatus86US 6,568,313 B2Sakagami Seisakusho Ltd. · 2003
- Fluid servo and applications57US 8,863,641 B2Isentropic Limited · 2014
- Cover seals with latching locking features30US 7,210,398 B2Bal Seal Engineering, Inc. · 2007
- Hydraulic actuator having frangible or deformable components20US 5,014,603 AAllied-Signal Inc. · 1991
- Contaminant resistant piston seal with energized backup scrapers19US 5,328,177 A1994