F25B 2600/2521
On-off valves controlled by pulse signals
F25B2600/2521 (On-off valves controlled by pulse signals) appears on 63 US grants and 79 published applications in this corpus.
Search patents in F25B- Granted patents
- 63
- Published applications
- 79
- Assignees
- 36
- Inventors
- 133
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 3 | 4 |
| 2004 | 1 | 3 |
| 2005 | 2 | 0 |
| 2006 | 1 | 2 |
| 2007 | 0 | 2 |
| 2008 | 1 | 9 |
| 2009 | 1 | 7 |
| 2010 | 0 | 11 |
| 2011 | 4 | 6 |
| 2012 | 5 | 5 |
| 2013 | 4 | 2 |
| 2014 | 1 | 3 |
| 2015 | 5 | 3 |
| 2016 | 3 | 4 |
| 2017 | 4 | 4 |
| 2018 | 6 | 1 |
| 2019 | 3 | 0 |
| 2020 | 1 | 3 |
| 2021 | 3 | 4 |
| 2022 | 5 | 3 |
| 2023 | 1 | 2 |
| 2024 | 2 | 1 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Heat pump device11 Nov 2025US 12,467,670 B2Daikin Europe N.V.
- Temperature regulating refrigeration systems for varying loads8 Jul 2025US 12,352,482 B2Tark Thermal Solutions, Inc.
- System and method for modulating hot gas reheat utilizing multiple compressor systems18 Jun 2024US 12,013,140 B2Johnson Controls Tyco IP Holdngs LLP
- Heat-driven vapor-compression system for air conditioning and refrigeration7 May 2024US 11,976,853 B2HyperBorean, Inc.
- Temperature regulating refrigeration systems for varying loads4 Apr 2023US 11,619,433 B2Laird Thermal Systems, Inc.
- Heat-Driven Vapor-Compression System for Air Conditioning and Refrigeration11 Jul 2024US 2024/0230173 A1HyperBorean, Inc.
- Temperature Regulating Refrigeration Systems for Varying Loads27 Jul 2023US 2023/0235934 A1Laird Thermal Systems, Inc.
- System and method for modulating hot gas reheat utilizing multiple compressor systems5 Jan 2023US 2023/0003415 A1Johnson Controls Tyco IP Holdings LLP
- Heat pump device8 Dec 2022US 2022/0390160 A1Daikin Europe N.V.
- Heat-Driven Vapor-Compression System for Air Conditioning and Refrigeration18 Aug 2022US 2022/0260289 A1HyperBorean, Inc.
Most cited
By later US patents
- Modulated temperature control for environmental chamber84US 5,226,472 ALab-Line Instruments, Inc. · 1993
- Pulsed flow for capacity control65US 6,047,556 ACarrier Corporation · 2000
- Compressor capacity modulation60US 6,206,652 B1Copeland Corporation · 2001
- Refrigeration or heat pump installation31US 5,007,247 ADanfoss A/S · 1991
- Heat pump system with auxiliary water heating30US 8,220,531 B2Carrier Corporation · 2012