F02G 2244/12
Having opposed pistons
Official title: having opposed pistons
F02G2244/12 (Having opposed pistons) appears on 16 US grants and 8 published applications in this corpus.
Search patents in F02G- Granted patents
- 16
- Published applications
- 8
- Assignees
- 10
- Inventors
- 22
- Latest grant
- 28 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 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 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Compact tandem cylinder reciprocating engine for CO2 power generation28 Jan 2025US 12,209,553 B2Indian Institute of Science
- Effective low temperature differential powered engines, systems, and methods21 Sep 2021US 11,125,183 B1Navita Energy, Inc.
- Combined wind and solar power generating system24 Dec 2019US 10,514,001 B2Solar Wind Reliance Initiatives (SWRI) Ltd.
- Free-piston stirling machine in an opposed piston gamma configuration having improved stability, efficiency and control17 Jun 2014US 8,752,375 B2Global Cooling, Inc.
- Configurations of a Stirling engine and heat pump24 Sep 2013US 8,539,764 B2
- Dual-Head Opposing-Piston Free-Piston Stirling Engine Design12 Mar 2026US 2026/0071588 A1Exowatt, Inc.
- Compact tandem cylinder reciprocating engine for co2 power generation26 Sep 2024US 2024/0318554 A1Indian Institute of Science
- Combined wind and solar power generating system14 Dec 2017US 2017/0356422 A1Solar Wind Reliance Initiatives (SWRI) Ltd.
- Free-Piston Stirling Machine In An Opposed Piston Gamma Configuration Having Improved Stability, Efficiency And Control21 Feb 2013US 2013/0042607 A1Global Cooling, Inc.
- Stirling engine12 May 2011US 2011/0107757 A1VKR Holding A/S
Most cited
By later US patents
- Method and apparatus for converting thermal energy to mechanical energy39US 7,284,372 B22007
- Mechanical arrangements for Stirling-cycle, reciprocating thermal machines33US 4,413,474 A1983
- Thermodynamic working fluids for Stirling-cycle, reciprocating thermal machines27US 4,413,475 A1983
- Magnetoelectric resonance engine26US 5,146,750 A1992
- Stirling engine with parallel flow heat exchangers14US 4,367,625 AMechanical Technology Incorporated · 1983