F02G 2270/40
Piston assemblies
F02G2270/40 (Piston assemblies) appears on 58 US grants and 57 published applications in this corpus.
Search patents in F02G- Granted patents
- 58
- Published applications
- 57
- Assignees
- 22
- Inventors
- 86
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 5 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 4 |
| 2009 | 2 | 0 |
| 2010 | 1 | 7 |
| 2011 | 1 | 3 |
| 2012 | 1 | 1 |
| 2013 | 3 | 2 |
| 2014 | 1 | 4 |
| 2015 | 3 | 4 |
| 2016 | 0 | 0 |
| 2017 | 6 | 1 |
| 2018 | 2 | 3 |
| 2019 | 2 | 0 |
| 2020 | 3 | 12 |
| 2021 | 7 | 2 |
| 2022 | 3 | 6 |
| 2023 | 4 | 4 |
| 2024 | 5 | 2 |
| 2025 | 2 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Maximum delivery adiabatic hot-air engine9 Jun 2026US 12,650,097 B1
- Single cylinder internally heated stirling engine24 Mar 2026US 12,584,454 B2
- System and apparatus for energy conversion18 Feb 2025US 12,228,094 B2Hyliion Holdings Corp.
- Multi-temperature double-acting piston21 Jan 2025US 12,203,427 B2
- Engine apparatus and method for operation29 Oct 2024US 12,129,812 B2Hyliion Holdings Corp.
- Single cylinder internally heated stirling engine4 Sep 2025US 2025/0277474 A1
- Stirling engine with near isothermal working spaces15 Aug 2024US 2024/0271835 A1
- Monolithic heat-exchanger bodies16 May 2024US 2024/0159201 A1Hyliion Holdings Corp.
- Moteur thermique alternatif a culasse chaude et cylindre froid28 Sep 2023US 2023/0304456 A1
- Piston a double effet multitemperature17 Aug 2023US 2023/0258145 A1
Most cited
By later US patents
- Magnetoelectric resonance engine26US 5,146,750 A1992
- Piston assembly for stirling engine19US 5,865,091 ASTM Corporation · 1999
- Piston apparatus, stirling engine, external combustion engine, and fluid device18US 7,624,574 B2Toyota Jidosha Kabushiki Kaisha · 2009
- Displacer piston assembly18US 7,866,153 B2Somemore Limited · 2011
- Compact flexure bearing spring for springing multiple bodies18US 8,960,655 B2SunPower Corporation · 2015