F16K 31/1223
One side of the piston being acted upon by the circulating fluid
Official title: {one side of the piston being acted upon by the circulating fluid}
F16K31/1223 (One side of the piston being acted upon by the circulating fluid) appears on 204 US grants and 215 published applications in this corpus.
Search patents in F16K- Granted patents
- 204
- Published applications
- 215
- Assignees
- 154
- Inventors
- 443
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 4 |
| 2005 | 2 | 2 |
| 2006 | 2 | 0 |
| 2007 | 2 | 6 |
| 2008 | 0 | 6 |
| 2009 | 1 | 4 |
| 2010 | 3 | 5 |
| 2011 | 4 | 6 |
| 2012 | 4 | 2 |
| 2013 | 4 | 6 |
| 2014 | 6 | 5 |
| 2015 | 4 | 9 |
| 2016 | 4 | 19 |
| 2017 | 13 | 17 |
| 2018 | 11 | 18 |
| 2019 | 22 | 21 |
| 2020 | 19 | 15 |
| 2021 | 20 | 15 |
| 2022 | 13 | 17 |
| 2023 | 12 | 17 |
| 2024 | 19 | 9 |
| 2025 | 11 | 7 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Flow valves operated by flow transfer means which regulate small flows of control46US 5,769,387 A1998
- Remotely-controlled valve26US 4,052,035 AConservocon, Inc. · 1977
- Actuator having Belleville washer configuration operating in concert with a piston cylinder member25US 4,445,424 ABaker CAC, Inc. · 1984
- Rupture control system25US 7,798,165 B22010
- Actuator having Belleville washer configuration operating in concert with a piston cylinder member23US 4,523,516 ABaker CAC, Inc. · 1985