F23L 11/005
Arrangements of valves or dampers after the fire: for closing the flue
Official title: {for closing the flue during interruption of burner function}
F23L11/005 (Arrangements of valves or dampers after the fire: for closing the flue) appears on 81 US grants and 30 published applications in this corpus.
Search patents in F23L- Granted patents
- 81
- Published applications
- 30
- Assignees
- 28
- Inventors
- 97
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 9 | 0 |
| 1981 | 13 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 2 | 1 |
| 2004 | 1 | 0 |
| 2005 | 1 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 1 | 3 |
| 2010 | 0 | 1 |
| 2011 | 0 | 2 |
| 2012 | 2 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 2 |
| 2015 | 1 | 0 |
| 2016 | 0 | 5 |
| 2017 | 0 | 2 |
| 2018 | 2 | 2 |
| 2019 | 4 | 2 |
| 2020 | 1 | 2 |
| 2021 | 1 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Non-return valve for a flow channel through which a flow of air flows24 Feb 2026US 12,560,242 B2Skoberne GmbH
- Vent proving system1 Mar 2022US 11,262,102 B2Field Controls, LLC
- System and method to reduce standby energy loss in a gas burning appliance and components for use therewith13 Apr 2021US 10,976,075 B2Invensys Controls Australia Pty Ltd.
- Sealed damper27 Oct 2020US 10,816,214 B2
- System and method to reduce standby energy loss in a gas burning appliance and components for use therewith10 Dec 2019US 10,502,455 B2Invensys Controls Australia Pty Ltd.
- Flexible anti-backflow damper for a fireplace system19 Feb 2026US 2026/0049715 A1HNI Technologies Inc.
- Non-return valve for a flow channel through which a flow of air flows14 Nov 2024US 2024/0376986 A1Skoberne GmbH
- Flue systems for fuel burning devices6 Jul 2023US 2023/0213188 A1Rheem Manufacturing Company
- Exhaust pipe system10 Sep 2020US 2020/0284465 A1Centrotherm Systemtechnik GmbH
- Nonreturn valve28 May 2020US 2020/0166147 A1Centrotherm Systemtechnik GmbH
Most cited
By later US patents
- Automatic boiler damper31US 4,046,318 A1977
- Apparatus and method for controlling a damper in a gas-fired appliance29US 8,113,823 B2Field Controls, LLC · 2012
- Independent biasing means for automatic flue damper25US 4,205,783 AWestinghouse Electric Corp. · 1980
- Wireless fireplace damper control device23US 7,451,759 B2Flue Sentinel, Inc. · 2008
- Automatic damper device22US 4,249,883 ASave Fuel Corporation · 1981