F25B 41/31
Expansion valves
F25B41/31 (Expansion valves) appears on 1,440 US grants and 1,378 published applications in this corpus.
Search patents in F25B- Granted patents
- 1,440
- Published applications
- 1,378
- Assignees
- 417
- Inventors
- 2,860
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 8 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 9 | 0 |
| 1983 | 3 | 0 |
| 1984 | 11 | 0 |
| 1985 | 12 | 0 |
| 1986 | 17 | 0 |
| 1987 | 16 | 0 |
| 1988 | 9 | 0 |
| 1989 | 22 | 0 |
| 1990 | 14 | 0 |
| 1991 | 21 | 0 |
| 1992 | 16 | 0 |
| 1993 | 21 | 0 |
| 1994 | 17 | 0 |
| 1995 | 23 | 0 |
| 1996 | 16 | 0 |
| 1997 | 23 | 0 |
| 1998 | 26 | 0 |
| 1999 | 29 | 0 |
| 2000 | 46 | 0 |
| 2001 | 48 | 19 |
| 2002 | 58 | 37 |
| 2003 | 44 | 28 |
| 2004 | 22 | 36 |
| 2005 | 26 | 29 |
| 2006 | 15 | 26 |
| 2007 | 18 | 36 |
| 2008 | 12 | 28 |
| 2009 | 8 | 27 |
| 2010 | 18 | 36 |
| 2011 | 17 | 22 |
| 2012 | 19 | 26 |
| 2013 | 12 | 28 |
| 2014 | 14 | 35 |
| 2015 | 30 | 55 |
| 2016 | 30 | 56 |
| 2017 | 39 | 44 |
| 2018 | 51 | 66 |
| 2019 | 69 | 66 |
| 2020 | 55 | 97 |
| 2021 | 60 | 104 |
| 2022 | 84 | 111 |
| 2023 | 76 | 106 |
| 2024 | 112 | 100 |
| 2025 | 78 | 74 |
| 2026 | 48 | 86 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F25B 41/34With the valve member being actuated by electric means812
- F25B 41/33With the valve member being actuated by the fluid pressure383
- F25B 41/325Having two or more valve members91
- F25B 41/315Actuated by floats51
- F25B 41/32Having flow rate limiting means other than the valve member18
- F25B 41/36With the valve member being actuated by bimetal elements or shape-memory elements7
Recent patents
- Refrigeration cycle device6 Oct 2026US 12,752,599 B2Denso Corporation
- Vapor compression and absorption refrigeration cycle (VCARC)6 Oct 2026US 12,753,955 B2Effusio, LLC
- Heat pump system and control method thereof6 Oct 2026US 12,753,957 B2Samsung Electronics Co., Ltd.
- Electromotive expansion valve and refrigeration circuit6 Oct 2026US 12,753,958 B2Mahle International GmbH
- Valve head structure and flow regulating valve with valve head structure29 Sep 2026US 12,747,794 B2Zhejiang Dunan Artificial Environment Co., Ltd.
- Heat pump8 Oct 2026US 2026/0309378 A1Daikin Europe N.V.
- Heat pump module, plant comprising such heat pump module and method for heating a substance8 Oct 2026US 2026/0309379 A1Snf Group
- Valve core assembly, thermostatic expansion valve, and refrigeration system1 Oct 2026US 2026/0298361 A1Zhejiang Dunan Artificial Environment Co., Ltd.
- Expander control in hvacr systems1 Oct 2026US 2026/0298514 A1Trane Air Conditioning Systems (China) Co., Ltd.
- Cooling System and Respective Operation1 Oct 2026US 2026/0298518 A1
Most cited
By later US patents
- Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor194US 6,047,557 ACopeland Corporation · 2000
- Economizer control with variable capacity193US 5,095,712 ACarrier Corporation · 1992
- Heat pump motor optimization and sensor fault detection164US 5,630,325 ACopeland Corporation · 1997
- Heat pump motor optimization and sensor fault detection156US 5,440,895 ACopeland Corporation · 1995
- Capacity modulated scroll machine156US 5,741,120 ACopeland Corporation · 1998