F15B 15/225
With valve stems operated by contact with the piston end face or
Official title: {with valve stems operated by contact with the piston end face or with the cylinder wall}
F15B15/225 (With valve stems operated by contact with the piston end face or) appears on 43 US grants and 32 published applications in this corpus.
Search patents in F15B- Granted patents
- 43
- Published applications
- 32
- Assignees
- 43
- Inventors
- 82
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 3 |
| 2007 | 2 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 3 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 2 | 1 |
| 2015 | 1 | 1 |
| 2016 | 2 | 2 |
| 2017 | 0 | 0 |
| 2018 | 2 | 4 |
| 2019 | 0 | 1 |
| 2020 | 4 | 4 |
| 2021 | 6 | 6 |
| 2022 | 2 | 1 |
| 2023 | 1 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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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
- Jacks26US 3,998,132 ASociete Anonyme: Poclain · 1976
- Rack and pinion pneumatic actuator with counter-pressure control and damping device25US 5,385,218 AUniver S . P . A. · 1995
- Pneumatic cylinder and control valve therefor22US 5,623,861 ASavair Inc. · 1997
- Fluid cushioning apparatus for hydraulic intensifier assembly15US 5,273,405 AJet Edge, Inc. · 1993