F16K 31/18
Actuated by a float
Official title: actuated by a float (floats F16K33/00; float-actuated valves in steam-traps F16T1/20, in boilers F22D5/08)
F16K31/18 (Actuated by a float) appears on 805 US grants and 541 published applications in this corpus.
Search patents in F16K- Granted patents
- 805
- Published applications
- 541
- Assignees
- 410
- Inventors
- 1,134
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 7 | 0 |
| 1978 | 12 | 0 |
| 1979 | 7 | 0 |
| 1980 | 11 | 0 |
| 1981 | 11 | 0 |
| 1982 | 15 | 0 |
| 1983 | 5 | 0 |
| 1984 | 16 | 0 |
| 1985 | 13 | 0 |
| 1986 | 13 | 0 |
| 1987 | 13 | 0 |
| 1988 | 17 | 0 |
| 1989 | 8 | 0 |
| 1990 | 5 | 0 |
| 1991 | 13 | 0 |
| 1992 | 9 | 0 |
| 1993 | 10 | 0 |
| 1994 | 11 | 0 |
| 1995 | 18 | 0 |
| 1996 | 14 | 0 |
| 1997 | 16 | 0 |
| 1998 | 18 | 0 |
| 1999 | 26 | 0 |
| 2000 | 26 | 0 |
| 2001 | 23 | 7 |
| 2002 | 12 | 8 |
| 2003 | 14 | 9 |
| 2004 | 7 | 14 |
| 2005 | 18 | 11 |
| 2006 | 5 | 12 |
| 2007 | 4 | 13 |
| 2008 | 4 | 13 |
| 2009 | 8 | 17 |
| 2010 | 11 | 17 |
| 2011 | 11 | 13 |
| 2012 | 17 | 16 |
| 2013 | 15 | 20 |
| 2014 | 11 | 18 |
| 2015 | 10 | 19 |
| 2016 | 22 | 31 |
| 2017 | 29 | 43 |
| 2018 | 32 | 43 |
| 2019 | 40 | 41 |
| 2020 | 41 | 44 |
| 2021 | 40 | 35 |
| 2022 | 35 | 27 |
| 2023 | 18 | 19 |
| 2024 | 27 | 24 |
| 2025 | 17 | 14 |
| 2026 | 8 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Valve lift arm6 Oct 2026US 12,753,855 B2Apex Valves Limited
- Electro-hydraulic valve for proportional control of spring apply hydraulic release (SAHR) brakes4 Aug 2026US 12,697,955 B2Zf Off-Highway Solutions Minnesota Inc.
- 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.
- Back flow valve5 May 2026US 12,618,475 B2
- Apparatus for the Control of a Flow of a Liquid1 Oct 2026US 2026/0299625 A1
- System and method for fluid handling in a shower or bath24 Sep 2026US 2026/0286668 A1
- Float-controlled gate for steady water flow13 Aug 2026US 2026/0235226 A1
- Control valve6 Aug 2026US 2026/0226997 A1Nanjing Hanshu Environmental Protection Equipment Co., Ltd.
- Liquid level valve16 Jul 2026US 2026/0201974 A1Nanjing Hanshu Environmental Protection Equipment Co., Ltd.
Most cited
By later US patents
- Apparatus and method for treating storm water runoff129US 5,707,527 AStormwater Treatment LLC · 1998
- Separation valve77US 5,918,622 ABermad · 1999
- Magnetic automatic stop valve73US 6,695,004 B1Alaris Medical Systems, Inc. · 2004
- Mobile delivery and storage system for cryogenic fluids65US 5,954,101 AMVE, Inc. · 1999
- Self-cleaning siphon-actuated radial flow filter basket64US 6,027,639 AStormwater Treatment LLC · 2000