F24F 2140/40
Damper positions
Official title: Damper positions, e.g. open or closed
F24F2140/40 (Damper positions) appears on 260 US grants and 292 published applications in this corpus.
Search patents in F24F- Granted patents
- 260
- Published applications
- 292
- Assignees
- 107
- Inventors
- 484
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 2 | 5 |
| 2006 | 5 | 2 |
| 2007 | 1 | 3 |
| 2008 | 0 | 2 |
| 2009 | 0 | 2 |
| 2010 | 1 | 2 |
| 2011 | 2 | 5 |
| 2012 | 0 | 4 |
| 2013 | 2 | 6 |
| 2014 | 4 | 14 |
| 2015 | 6 | 27 |
| 2016 | 10 | 21 |
| 2017 | 16 | 13 |
| 2018 | 20 | 26 |
| 2019 | 17 | 28 |
| 2020 | 25 | 27 |
| 2021 | 28 | 34 |
| 2022 | 32 | 20 |
| 2023 | 29 | 19 |
| 2024 | 17 | 20 |
| 2025 | 12 | 7 |
| 2026 | 10 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method, controller and system of controlling thermal power transfer through a thermal energy exchanger6 Oct 2026US 12,753,941 B2Belimo Holding AG
- Method and system for controlling a fresh air intake of an air handling unit of an HVAC system21 Jul 2026US 12,687,314 B2Honeywell International Inc.
- Adjustable split heating, ventilating, and air conditioning systems9 Jun 2026US 12,650,236 B2Rheem Manufacturing Company
- Indoor gas exchange system19 May 2026US 12,631,360 B2Microjet Technology Co., Ltd.
- Monitoring an operating condition of an HVAC flow regulator14 Apr 2026US 12,601,422 B2Belimo Holding AG
- Hvac actuator with inductive position sensing using patterns16 Jul 2026US 2026/0202222 A1Tyco Fire & Security GmbH
- System and method for management of variable air volume unit in a facility7 May 2026US 2026/0126197 A1Honeywell International Inc.
- Hvac system with wireless damper and zoning control7 May 2026US 2026/0126201 A1Lennox Industries Inc.
- System and method for controlling a flow unit18 Dec 2025US 2025/0383108 A1Siemens Industry, Inc.
- Wireless remote indoor sensor for home automation20 Nov 2025US 2025/0354715 A1Lennox Industries Inc.
Most cited
By later US patents
- Easy-to-install thermostatic control system based on room occupancy291US 5,476,221 A1995
- Air handling unit including control system that prevents outside air from entering the unit through an exhaust air damper120US 5,791,408 AJohnson Service Company · 1998
- Electronic refrigeration and air conditioner monitor and alarm116US 5,684,463 A1997
- Load control system having an energy savings mode96US 8,417,388 B2Lutron Electronics Co., Inc. · 2013
- Window system for a building70US 5,226,256 AAug. Winkhaus GmbH & Co. KG · 1993