F16K 15/1826
Check valves which can be actuated by a pilot valve
Official title: {Check valves which can be actuated by a pilot valve}
F16K15/1826 (Check valves which can be actuated by a pilot valve) appears on 57 US grants and 64 published applications in this corpus.
Search patents in F16K- Granted patents
- 57
- Published applications
- 64
- Assignees
- 47
- Inventors
- 129
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 6 |
| 2015 | 4 | 4 |
| 2016 | 1 | 5 |
| 2017 | 5 | 7 |
| 2018 | 3 | 4 |
| 2019 | 7 | 8 |
| 2020 | 4 | 3 |
| 2021 | 3 | 6 |
| 2022 | 7 | 5 |
| 2023 | 5 | 3 |
| 2024 | 3 | 4 |
| 2025 | 4 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Automatic fluid-mechanical actuated emergency stop valve for abnormal flow and spillage protection30 Dec 2025US 12,510,177 B2
- Valve assembly25 Nov 2025US 12,480,588 B2Jtekt Corporation
- Check valve device1 Jul 2025US 12,345,342 B2Kosmek Ltd.
- Pressure relief valve assembly, modular pressure relief valve assembly, and hydraulic control assembly having such a pressure relief valve assembly3 Jun 2025US 12,320,437 B2Robert Bosch GmbH
- Valve assembly with preloaded control oil return23 Jul 2024US 12,044,323 B2Robert Bosch GmbH
- Automatic fluid-mechanical actuated emergency stop valve for abnormal flow and spillage protection13 Feb 2025US 2025/0052332 A1
- Valve assembly19 Dec 2024US 2024/0418277 A1Jtekt Corporation
- Check valve device21 Nov 2024US 2024/0384805 A1Kosmek Ltd.
- Pressure Relief Valve Assembly, Modular Pressure Relief Valve Assembly, and Hydraulic Control Assembly Having Such a Pressure Relief Valve Assembly4 Apr 2024US 2024/0110633 A1Robert Bosch GmbH
- Grease pressure relief system29 Feb 2024US 2024/0068617 A1Patriot Research Center, LLC (DBA Atlas Pressure Control)
Most cited
By later US patents
- Check valve pull assembly17US 5,255,712 A1993
- Dry pipe/deluge valve for automatic sprinkler systems16US 7,673,695 B2The Reliable Automatic Sprinkler Co., Inc. · 2010
- By-pass pilot operated hydraulic check valve12US 4,391,296 A1983
- Pilot operated check valve11US 4,282,896 AShinei Mfg. Co., Ltd. · 1981
- Water-hammerless check valve10US 6,102,072 AKabushiki Kaisha Yokota Seisakusho · 2000