F22D 5/00
Controlling water feed or water level
Official title: Controlling water feed or water level; Automatic water feeding or water-level regulators
F22D5/00 (Controlling water feed or water level) appears on 132 US grants and 127 published applications in this corpus.
Search patents in F22D- Granted patents
- 132
- Published applications
- 127
- Assignees
- 97
- Inventors
- 352
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 2 | 3 |
| 2007 | 1 | 2 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 15 |
| 2014 | 1 | 10 |
| 2015 | 8 | 12 |
| 2016 | 8 | 8 |
| 2017 | 9 | 11 |
| 2018 | 10 | 6 |
| 2019 | 11 | 11 |
| 2020 | 4 | 9 |
| 2021 | 13 | 9 |
| 2022 | 11 | 10 |
| 2023 | 4 | 5 |
| 2024 | 8 | 6 |
| 2025 | 4 | 0 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F22D 5/26Automatic feed-control systems99
- F22D 5/18Controlling water feed or water level: for varying the speed or delivery6
- F22D 5/24Controlling water feed or water level: with electric switches5
- F22D 5/02Controlling water feed or water level: with an intermediate compartment from which1
- F22D 5/06Controlling water feed or water level: with receptacles external to, but in1
- F22D 5/08Controlling water feed or water level: with float-actuated valves1
- F22D 5/14Responsive to thermal expansion and contraction1
- F22D 5/04Controlling water feed or water level: with pivoting buckets0
Recent patents
- Integrated control logic device and operating method thereof to control water level of steam generator of nuclear power plant26 May 2026US 12,638,171 B2Kepco Engineering & Construction Company, Inc.
- Electronic cooking apparatus having steam supply device26 May 2026US 12,638,190 B2LG Electronics Inc.
- Operating a domestic steam-treatment appliance, and domestic steam-treatment appliance23 Dec 2025US 12,504,164 B2BSH Hausgeräte GmbH
- Solar steam electricity system25 Nov 2025US 12,480,428 B1Prince Mohammad Bin Fahd University
- Solar electrical grid with distributed solar generation21 Oct 2025US 12,451,762 B1Prince Mohammad Bin Fahd University
- Energy storage and utilisation system12 Feb 2026US 2026/0043541 A1Graphite Energy (Assets) Pty Limited
- Steam generator8 Jan 2026US 2026/0009532 A1Kohler Novita., Ltd.
- Steam boiler system and method of circulating water and steam in a steam boiler system19 Dec 2024US 2024/0418361 A1Maxi-Therme Inc.
- Steam generation control method19 Dec 2024US 2024/0418362 A1New Watt (Fujian) High-Tech Co. Ltd
- Steam generator and method24 Oct 2024US 2024/0353093 A1
Most cited
By later US patents
- Steam generator32US 10,125,978 B2Panasonic Intellectual Property Management Co., Ltd. · 2018
- Portable steam and heat generator30US 7,100,540 B2Hot Water Holdings Ltd · 2006
- Boiler level control system26US 4,242,989 AGeneral Electric Company · 1981
- Liquid level control25US 4,491,146 AGroen Division - Dover Corporation · 1985
- Apparatus for controlling drum water level of drum type boiler22US 4,619,224 AHitachi, Ltd. · 1986