F04B 49/04
Regulating by means of floats
Official title: Regulating by means of floats (F04B49/025 takes precedence)
F04B49/04 (Regulating by means of floats) appears on 81 US grants and 69 published applications in this corpus.
Search patents in F04B- Granted patents
- 81
- Published applications
- 69
- Assignees
- 49
- Inventors
- 122
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 2 | 2 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 2 |
| 2013 | 2 | 1 |
| 2014 | 4 | 1 |
| 2015 | 2 | 3 |
| 2016 | 1 | 1 |
| 2017 | 1 | 1 |
| 2018 | 2 | 12 |
| 2019 | 5 | 14 |
| 2020 | 13 | 4 |
| 2021 | 7 | 5 |
| 2022 | 2 | 7 |
| 2023 | 8 | 3 |
| 2024 | 4 | 4 |
| 2025 | 2 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Sump/ejector pump monitor and sump/ejector pump failure warning system24 Feb 2026US 12,560,650 B2RF Group LLC
- Motor leakage current detector, devices using same and related methods12 Aug 2025US 12,385,985 B2Grid Connect, Inc.
- Pumping system27 May 2025US 12,313,056 B2
- Compressor and refrigeration cycle device having the same17 Sep 2024US 12,092,379 B2Samsung Electronics Co., Ltd.
- Pump, multi-function valve, and controller apparatus18 Jun 2024US 12,013,051 B2PumpOne Environmental, LLC
- Basement sump control systems and methods2 Jul 2026US 2026/0185519 A1DNI Realty, LLC
- Fluid Control System for Supplying Pressurized Fluid to Hand Operated Pumps23 Apr 2026US 2026/0111045 A1
- Compressor and refrigeration cycle device having the same12 Dec 2024US 2024/0410629 A1Samsung Electronics Co., Ltd.
- Pumping system27 Jun 2024US 2024/0209848 A1
- Sump/ejector pump monitor and sump/ejector pump failure warning system6 Jun 2024US 2024/0183904 A1RF Group LLC
Most cited
By later US patents
- Peristaltic pumping method and apparatus67US 4,515,589 A1985
- Wet-dry vacuum apparatus with pump means for discharging liquid therefrom61US 4,080,104 A1978
- Battery monitoring and charging circuit for sump pumps56US 5,015,152 AThe Marley Company · 1991
- Fluid analysis system42US 5,105,085 A1992
- Apparatus for warning of the failure of a sump pump32US 3,932,853 A1976