F25B 2309/1408
Pulse-tube cycles with pulse tube having u-turn or l-turn type geometrical arrangements
Official title: Pulse-tube cycles with pulse tube having U-turn or L-turn type geometrical arrangements
F25B2309/1408 (Pulse-tube cycles with pulse tube having u-turn or l-turn type geometrical arrangements) appears on 126 US grants and 103 published applications in this corpus.
Search patents in F25B- Granted patents
- 126
- Published applications
- 103
- Assignees
- 59
- Inventors
- 207
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 9 | 1 |
| 2002 | 8 | 5 |
| 2003 | 6 | 2 |
| 2004 | 1 | 9 |
| 2005 | 0 | 14 |
| 2006 | 9 | 8 |
| 2007 | 13 | 15 |
| 2008 | 7 | 14 |
| 2009 | 9 | 6 |
| 2010 | 1 | 2 |
| 2011 | 1 | 6 |
| 2012 | 0 | 2 |
| 2013 | 7 | 4 |
| 2014 | 2 | 3 |
| 2015 | 3 | 4 |
| 2016 | 2 | 1 |
| 2017 | 3 | 0 |
| 2018 | 4 | 0 |
| 2019 | 1 | 2 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 3 | 1 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Hydrogen or helium throttling liquefaction system using direct current flow from the cold and hot ends of the regenerative cryocoolers23 Dec 2025US 12,504,225 B2Zhejiang University
- Regenerator for a cryo-cooler with helium as a working gas and as a heat-storing material18 Nov 2025US 12,474,092 B2Pressure Wave Systems GmbH
- Coaxial pulse tube cryocoolers26 Nov 2024US 12,152,821 B1Boscryo LLC
- Pulse tube cryocooler and method of manufacturing pulse tube cryocooler22 Nov 2022US 11,506,426 B2Sumitomo Heavy Industries, Ltd.
- Cryocooler17 May 2022US 11,333,405 B2Sumitomo Heavy Industries, Ltd.
- A hydrogen or helium throttling liquefaction system using direct current flow from the cold and hot ends of the regenerative cryocoolers8 Aug 2024US 2024/0263871 A1Zhejiang University
- Regenerator for a Cryo-Cooler With Helium as a Working Gas and as a Heat-Storing Material2 Nov 2023US 2023/0349596 A1Pressure Wave Systems GmbH
- Regenerator For A Cryo-Cooler That Uses Helium As A Working Gas24 Feb 2022US 2022/0057114 A9Pressure Wave Systems GmbH
- Pulse tube cryocooler and method of manufacturing pulse tube cryocooler8 Jul 2021US 2021/0207853 A1Sumitomo Heavy Industries, Ltd.
- Cryocooler3 Dec 2020US 2020/0378653 A1Sumitomo Heavy Industries, Ltd.
Most cited
By later US patents
- Intrinsically irreversible heat engine59US 4,489,553 AThe United States of America as represented by the United States Department of Energy · 1984
- Acoustic cryocooler58US 4,953,366 AThe United States of America as represented by the United States Department of Energy · 1990
- Acoustical heat pumping engine55US 4,398,398 A1983
- High-efficiency heat-driven acoustic cooling engine with no moving parts46US 5,901,556 AThe United States of America as represented by the Secretary of the Navy · 1999
- Multi-bypass pulse tube refrigerator44US 5,295,355 ACryogenic Laboratory of Chinese Academy of Sciences · 1994