F02B 71/06
Free-piston combustion gas generators per se
F02B71/06 (Free-piston combustion gas generators per se) appears on 25 US grants and 19 published applications in this corpus.
Search patents in F02B- Granted patents
- 25
- Published applications
- 19
- Assignees
- 15
- Inventors
- 46
- Latest grant
- 24 Dec 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 2 |
| 2006 | 1 | 2 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 2 |
| 2015 | 2 | 1 |
| 2016 | 1 | 1 |
| 2017 | 1 | 2 |
| 2018 | 1 | 0 |
| 2019 | 2 | 4 |
| 2020 | 3 | 2 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Free-piston linear generator24 Dec 2024US 12,173,642 B1
- DC-DC converter in a non-steady system9 Feb 2021US 10,916,991 B2Mainspring Energy, Inc.
- Free piston engine power plant22 Dec 2020US 10,871,106 B2University of Durham
- Combustion chamber arrangement and system comprising said arrangement28 Apr 2020US 10,634,046 B2Finno Energy Oy
- DC-DC converter in a non-steady system4 Feb 2020US 10,554,099 B2EtaGen, Inc.
- Gas propulsion thrust device1 Oct 2026US 2026/0298134 A1
- Dc-dc converter in a non-steady system16 Jul 2020US 2020/0227976 A1Mainspring Energy, Inc.
- Engine9 Jul 2020US 2020/0217245 A1Amnext Technology, Inc.
- An alternate procedure for operating an ic engine8 Aug 2019US 2019/0242293 A1
- Dc-dc converter in a non-steady system21 Mar 2019US 2019/0089225 A1EtaGen, Inc.
Most cited
By later US patents
- Air charging system for an opposed piston opposed cylinder free piston engine39US 6,957,632 B1Ford Global Technologies, LLC · 2005
- Tandem machine with opposed free pistons13US 4,412,476 A1983
- Power plant having a free piston combustion member11US 4,399,654 A1983
- Gas turbine power production unit including a free piston gas generator9US 4,481,772 A1984
- Free-piston engine5US 5,144,917 A1992