F25B 2600/2517
Head-pressure valves
F25B2600/2517 (Head-pressure valves) appears on 28 US grants and 36 published applications in this corpus.
Search patents in F25B- Granted patents
- 28
- Published applications
- 36
- Assignees
- 23
- Inventors
- 69
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 3 |
| 2003 | 1 | 0 |
| 2004 | 2 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 2 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 3 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 1 | 2 |
| 2016 | 2 | 0 |
| 2017 | 0 | 3 |
| 2018 | 2 | 3 |
| 2019 | 1 | 4 |
| 2020 | 3 | 1 |
| 2021 | 3 | 2 |
| 2022 | 2 | 1 |
| 2023 | 1 | 0 |
| 2024 | 3 | 3 |
| 2025 | 2 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for controlling head pressure in a refrigeration system13 Jan 2026US 12,523,405 B2Lennox Industries Inc.
- Refrigeration system with emergency cooling using dedicated compressor1 Jul 2025US 12,345,455 B2Heatcraft Refrigeration Products LLC
- Refrigeration system with emergency cooling using dedicated compressor1 Jul 2025US 12,345,456 B2Heatcraft Refrigeration Products LLC
- Method and system for compressor operating range extension via active valve control25 Jun 2024US 12,018,693 B2Carrier Corporation
- Refrigeration system with emergency cooling using dedicated compressor14 May 2024US 11,982,480 B2Heatcraft Refrigeration Products LLC
- System and Method for Controlling Head Pressure in a Refrigeration System16 Jul 2026US 2026/0202111 A1Lennox Industries Inc.
- Refrigeration cycle apparatus2 Jul 2026US 2026/0185764 A1Daikin Industries, Ltd.
- System and Method for Controlling Head Pressure in a Refrigeration System16 Oct 2025US 2025/0321036 A1Lennox Industries Inc.
- System and method to modulate refrigerant pressure24 Jul 2025US 2025/0237421 A1United Coolair Corporation
- Transport method, refrigeration method, refrigeration system, and hose for refrigeration system17 Apr 2025US 2025/0123037 A1Daikin Industries, Ltd.
Most cited
By later US patents
- Ground source heat pump system62US 5,651,265 A1997
- Compact ice making machine with cool vapor defrost53US 6,705,107 B2Manitowoc Foodservice Companies, Inc. · 2004
- Method for refrigerant pressure control in refrigeration systems37US 7,559,207 B2York International Corporation · 2009
- Heat pump system having a pre-processing module30US 8,915,092 B2Venmar CES, Inc. · 2014
- CO2 refrigeration system with hot gas defrost17US 9,377,236 B2Hilll Phoenix, Inc. · 2016