F15B 15/222
Having a piston with a piston extension or piston recess which throttles
Official title: {having a piston with a piston extension or piston recess which throttles the main fluid outlet as the piston approaches its end position}
F15B15/222 (Having a piston with a piston extension or piston recess which throttles) appears on 83 US grants and 63 published applications in this corpus.
Search patents in F15B- Granted patents
- 83
- Published applications
- 63
- Assignees
- 73
- Inventors
- 171
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 6 | 4 |
| 2003 | 2 | 1 |
| 2004 | 0 | 2 |
| 2005 | 1 | 2 |
| 2006 | 2 | 1 |
| 2007 | 1 | 4 |
| 2008 | 1 | 2 |
| 2009 | 2 | 1 |
| 2010 | 1 | 3 |
| 2011 | 1 | 2 |
| 2012 | 2 | 0 |
| 2013 | 0 | 5 |
| 2014 | 3 | 2 |
| 2015 | 1 | 5 |
| 2016 | 3 | 3 |
| 2017 | 4 | 2 |
| 2018 | 3 | 3 |
| 2019 | 3 | 0 |
| 2020 | 0 | 2 |
| 2021 | 1 | 3 |
| 2022 | 4 | 3 |
| 2023 | 0 | 2 |
| 2024 | 1 | 3 |
| 2025 | 5 | 0 |
| 2026 | 2 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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- Fluid pressure cylinder26 Mar 2026US 2026/0085705 A1KYB Corporation
- Single acting hydraulic cylinder with head end cushioning5 Mar 2026US 2026/0063152 A1Wipro Enterprises Pvt Ltd
Most cited
By later US patents
- Pneumatic cylinder utilizing cushioning sleeves, quick exhaust valves and quick supply valves68US 5,517,898 AKorea Institute of Machinery & Materials · 1996
- Fluid cylinder decelerating means30US 3,974,910 A1976
- Cushioned hydraulic lift mechanism with slot in cylinder wall24US 5,461,965 AReliance Medical Products, Inc. · 1995
- Driving device especially for return stiffening of a safety belt in an automatic safety belt wind-up device22US 4,573,322 ARepa Feinstanswerk GmbH · 1986
- Pneumatic cylinder and control valve therefor22US 5,623,861 ASavair Inc. · 1997