F16K 21/18
Closed when a rising liquid reaches a predetermined level
Official title: closed when a rising liquid reaches a predetermined level (float-actuated valves F16K31/18)
F16K21/18 (Closed when a rising liquid reaches a predetermined level) appears on 212 US grants and 157 published applications in this corpus.
Search patents in F16K- Granted patents
- 212
- Published applications
- 157
- Assignees
- 104
- Inventors
- 319
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 1 |
| 2002 | 2 | 5 |
| 2003 | 5 | 7 |
| 2004 | 8 | 2 |
| 2005 | 1 | 4 |
| 2006 | 3 | 4 |
| 2007 | 5 | 4 |
| 2008 | 2 | 6 |
| 2009 | 1 | 5 |
| 2010 | 3 | 5 |
| 2011 | 4 | 1 |
| 2012 | 5 | 2 |
| 2013 | 3 | 5 |
| 2014 | 4 | 7 |
| 2015 | 7 | 7 |
| 2016 | 6 | 3 |
| 2017 | 6 | 13 |
| 2018 | 7 | 16 |
| 2019 | 7 | 12 |
| 2020 | 20 | 13 |
| 2021 | 13 | 13 |
| 2022 | 5 | 3 |
| 2023 | 5 | 3 |
| 2024 | 6 | 6 |
| 2025 | 9 | 7 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Automatic control water valve and automatic water feeder26 May 2026US 12,638,094 B2
- Float-actuated fluid valve assembly19 May 2026US 12,631,261 B1A.O. International II, Inc.
- Optimized control of oilfield separator level and dump valves7 Apr 2026US 12,596,388 B2Devon Energy Corporation
- Flow control of an injection molding system23 Dec 2025US 12,502,816 B2Incoe Corporation
- Siphon systems and vacuum pumps2 Dec 2025US 12,486,920 B2
- Techniques for fluid control4 Jun 2026US 2026/0153162 A1
- Automatic control water valve and automatic water feeder22 Jan 2026US 2026/0022778 A1Shenzhen Rongcheng Innovation Technology Co., LTD
- Fill valve actuation systems and methods1 Jan 2026US 2026/0002600 A1Fluidmaster, Inc.
- Interface and motion translation devices, systems, and methods for endoscope valves17 Jul 2025US 2025/0228431 A1Boston Scientific Scimed, Inc.
- Devices, systems, and methods for controlling fluids in endoscope systems1 May 2025US 2025/0134350 A1Boston Scientific Scimed, Inc.
Most cited
By later US patents
- Magnetic automatic stop valve73US 6,695,004 B1Alaris Medical Systems, Inc. · 2004
- Drop tubes and overfill valves therefor60US 5,174,345 ADover Corporation · 1992
- Stop fill valve50US 4,483,367 ARochester Gauges, Inc. · 1984
- Fill valve41US 4,180,096 AJ. H. Industries, Inc. · 1979
- Tank overfill valve38US 4,667,711 A1987