F15B 15/227
Having an auxiliary cushioning piston within the main piston or the cylinder
Official title: {having an auxiliary cushioning piston within the main piston or the cylinder end face}
F15B15/227 (Having an auxiliary cushioning piston within the main piston or the cylinder) appears on 42 US grants and 32 published applications in this corpus.
Search patents in F15B- Granted patents
- 42
- Published applications
- 32
- Assignees
- 41
- Inventors
- 76
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 0 |
| 2004 | 1 | 4 |
| 2005 | 1 | 1 |
| 2006 | 1 | 5 |
| 2007 | 1 | 1 |
| 2008 | 2 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 4 |
| 2017 | 2 | 4 |
| 2018 | 4 | 2 |
| 2019 | 3 | 1 |
| 2020 | 3 | 1 |
| 2021 | 0 | 1 |
| 2022 | 3 | 2 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 2 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Pneumatic cylinder motor with end-of-travel cushioning mechanism38US 4,700,611 AShoketsu Kinzoku Kogyo Kabushiki Kaisha · 1987
- Hydraulic actuator with shock absorbing capability25US 6,176,170 B1Brunswick Corporation · 2001
- Method and device for braking the speed of movement of the piston of a plunger-cylinder device16US 4,210,064 AHydraudyne B.V. · 1980
- Fluid-operated cylinder with cushioning flow rate control valve means14US 4,706,781 AKabushiki Kaisha Toyoda Jidoshokki Seisakusho · 1987
- Pneumatic cylinder14US 7,395,749 B22008