F02B 75/285
Comprising a free auxiliary piston
Official title: {comprising a free auxiliary piston}
F02B75/285 (Comprising a free auxiliary piston) appears on 7 US grants and 9 published applications in this corpus.
Search patents in F02B- Granted patents
- 7
- Published applications
- 9
- Assignees
- 8
- Inventors
- 15
- Latest grant
- 22 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2003 | 0 | 2 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 1 |
| 2019 | 2 | 2 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
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Recent patents
- Power coupling for free piston mover22 Jul 2025US 12,368,360 B2Libertine FPE Ltd
- Movable fulcrum for differential and variable-stroke cycle engines6 Aug 2019US 10,371,046 B2Yan Engines, Inc.
- Opposed piston engine cylinder with carbon scraper29 Jan 2019US 10,190,528 B2Fairbanks Morse, LLC
- Potential energy storage engine4 Jul 2017US 9,695,746 B2
- Linear free piston combustion engine with indirect work extraction via gas linkage7 Apr 2015US 8,997,699 B2EtaGen, Inc.
- Power coupling for free piston mover2 Feb 2023US 2023/0035014 A1Libertine FPE Ltd
- Variable stroke internal combustion engine with variable airflow and compression ratio4 Jul 2019US 2019/0203650 A1Yan Engines, Inc.
- Movable fulcrum for differential and variable-stroke cycle engines18 Apr 2019US 2019/0112976 A1Yan Engines, Inc.
- Opposed piston engine cylinder with carbon scraper2 Aug 2018US 2018/0216567 A1Fairbanks Morse, LLC
- Potential Energy Storage Engine10 Nov 2016US 2016/0326953 A1
Most cited
By later US patents