F02G 2270/80
Engines without crankshafts
F02G2270/80 (Engines without crankshafts) appears on 37 US grants and 26 published applications in this corpus.
Search patents in F02G- Granted patents
- 37
- Published applications
- 26
- Assignees
- 12
- Inventors
- 37
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 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 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 0 | 0 |
| 2015 | 2 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 3 |
| 2018 | 0 | 2 |
| 2019 | 2 | 0 |
| 2020 | 2 | 8 |
| 2021 | 5 | 2 |
| 2022 | 2 | 3 |
| 2023 | 3 | 2 |
| 2024 | 3 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Thermo-magnetic motor10 Mar 2026US 12,571,357 B1
- Engine apparatus and method for operation29 Oct 2024US 12,129,812 B2Hyliion Holdings Corp.
- Constant density heat exchanger and system for energy conversion7 May 2024US 11,976,610 B2Hyliion Holdings Corp.
- Monolithic heat-exchanger bodies30 Jan 2024US 11,885,279 B2Hyliion Holdings Corp.
- Energy conversion apparatus29 Aug 2023US 11,739,711 B2Hyliion Holdings Corp.
- Monolithic heat-exchanger bodies16 May 2024US 2024/0159201 A1Hyliion Holdings Corp.
- Constant density heat exchanger and system for energy conversion20 Jul 2023US 2023/0228229 A1General Electric Company
- Energy conversion apparatus19 Jan 2023US 2023/0019495 A1General Electric Company
- Monolithic heat-exchanger bodies15 Sep 2022US 2022/0290630 A1General Electric Company
- Engine apparatus and method for operation23 Jun 2022US 2022/0195959 A1General Electric Company
Most cited
By later US patents
- Variable cycle stirling engine and gas leakage control system therefor66US 4,489,554 A1984
- Stirling machine32US 4,717,405 ABattelle Memorial Institute · 1988
- Magnetoelectric resonance engine26US 5,146,750 A1992
- External combustion engines25US 4,638,633 A1987
- Control scheme for power modulation of a free piston Stirling engine22US 4,873,826 AMechanical Technology Incorporated · 1989