F02B 75/30
With one working piston sliding inside another
Official title: with one working piston sliding inside another
F02B75/30 (With one working piston sliding inside another) appears on 52 US grants and 40 published applications in this corpus.
Search patents in F02B- Granted patents
- 52
- Published applications
- 40
- Assignees
- 17
- Inventors
- 40
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 3 |
| 2003 | 3 | 1 |
| 2004 | 1 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 2 | 0 |
| 2008 | 2 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 2 | 1 |
| 2015 | 1 | 0 |
| 2016 | 1 | 2 |
| 2017 | 7 | 10 |
| 2018 | 4 | 3 |
| 2019 | 4 | 1 |
| 2020 | 0 | 4 |
| 2021 | 3 | 1 |
| 2022 | 2 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 2 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dual piston based gensets for vehicle electrification16 Jun 2026US 12,655,787 B2ePower Mobility LLC
- Self-charged four stroke one-cycle combustion cylinder for internal combustion engine29 Jul 2025US 12,372,016 B1
- Piston system for a compression engine29 Jul 2025US 12,372,026 B2
- Engine with gas exchange through piston rod27 Jun 2023US 11,686,199 B2Aquarius Engines (A.M.) Ltd.
- Engine with work stroke and gas exchange through piston rod31 May 2022US 11,346,219 B2Aquarius Engines (A.M.) Ltd.
- Piston System For a Compression Engine24 Apr 2025US 2025/0129740 A1
- Dual piston based gensets for vehicle electrification20 Mar 2025US 2025/0092819 A1ePower Mobility LLC
- Engine with gas exchange through piston rod8 Sep 2022US 2022/0282620 A1Aquarius Engines (A.M.) Ltd.
- A two stroke engine with valves actuated by air pressure near bottom dead center23 Sep 2021US 2021/0293177 A1
- Wireless control of actuated valve in variable compression ratio piston31 Dec 2020US 2020/0408145 A1King Abdullah University of Science and Technology
Most cited
By later US patents
- High efficiency multicycle internal combustion engine with waste heat recovery41US 8,061,140 B2Thermal Power Recovery LLC · 2011
- Dual compression and dual expansion internal combustion engine and method therefor31US 5,542,382 ACaterpillar Inc. · 1996
- Engine connecting rod and double piston assembly25US 5,865,092 A1999
- Piston-in-piston variable compression ratio engine18US 6,752,105 B2The United States of America as represented by the Administrator of the United States Environmental Protection Agency · 2004
- Internal combustion cylinder engine11US 6,032,622 ALandbank Properties, Inc. · 2000