F02G 2243/20
Each having a single free piston
Official title: each having a single free piston, e.g. "Beale engines"
F02G2243/20 (Each having a single free piston) appears on 12 US grants and 8 published applications in this corpus.
Search patents in F02G- Granted patents
- 12
- Published applications
- 8
- Assignees
- 6
- Inventors
- 19
- Latest grant
- 28 Dec 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 2 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 2 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Cryogenic Stirling refrigerator with a pneumatic expander28 Dec 2021US 11,209,192 B2Cryo Tech Ltd.
- Free piston stirling engine that limits overstroke18 Jun 2019US 10,323,603 B2SunPower Corporation
- Free piston stirling engine that remains stable by limiting stroke18 Jun 2019US 10,323,604 B2SunPower Corporation
- Stirling machine18 Aug 2015US 9,109,533 B2
- Two piston, concentric cylinder, alpha free piston Stirling machine14 Oct 2014US 8,857,173 B2SunPower Corporation
- Cryogenic stirling refrigerator with a pneumatic expander4 Feb 2021US 2021/0033313 A1Cryo Tech Ltd.
- Free piston stirling engine that remains stable and limits stroke despite loss of load or malfunction of engine controller or its connections26 Apr 2018US 2018/0112624 A1SunPower Corporation
- Free piston stirling engine that remains stable and limits stroke despite loss of load or malfunction of engine controller or its connections26 Apr 2018US 2018/0112625 A1SunPower Corporation
- Two Piston, Concentric Cylinder, Alpha Free Piston Stirling Machine18 Jul 2013US 2013/0180239 A1SunPower Corporation
- Stirling Machine7 Feb 2013US 2013/0031899 A1
Most cited
By later US patents
- Multiple-cylinder, free-piston, alpha configured stirling engines and heat pumps with stepped pistons33US 7,171,811 B1Global Cooling, Inc. · 2007
- Two piston, concentric cylinder, alpha free piston Stirling machine11US 8,857,173 B2SunPower Corporation · 2014
- Thermal power machine having a moving regenerator8US 6,041,599 A2000
- Stirling engine assembly6US 6,983,593 B2Microgen Energy Limited · 2006
- Thermodynamic free walking beam engine2US 7,363,760 B12008