F01B 7/18
Machines or engines with two or more pistons reciprocating within same cylinder
Official title: with differential piston (F01B7/20 takes precedence)
F01B7/18 (Machines or engines with two or more pistons reciprocating within same cylinder) appears on 16 US grants and 10 published applications in this corpus.
Search patents in F01B- Granted patents
- 16
- Published applications
- 10
- Assignees
- 4
- Inventors
- 22
- Latest grant
- 28 May 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 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 | 0 |
| 2007 | 0 | 0 |
| 2008 | 2 | 1 |
| 2009 | 2 | 1 |
| 2010 | 1 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Piston in piston variable displacement hydraulic device28 May 2024US 11,994,121 B1Tonand Inc.
- Two-cycle motor31 May 2022US 11,346,277 B1
- Fuel ignition methods for opposed piston engines and related structures27 Apr 2021US 10,989,109 B2
- Engine block and a process for hybrid ignition of an engine2 Oct 2018US 10,087,818 B2
- Piston type internal combustion engine9 Feb 2016US 9,255,544 B2
- Piston in piston variable displacement hydraulic device30 Jul 2026US 2026/0218690 A1
- Piston in piston variable displacement hydraulic device12 Dec 2024US 2024/0410345 A1
- Fuel ignition methods for opposed piston engines and related structures23 Jan 2020US 2020/0025064 A1Warren Engine Company, Inc.
- An engine block and a process for hybrid ignition of an engine20 Apr 2017US 2017/0107894 A1
- Piston type internal combustion engine27 Aug 2015US 2015/0240742 A1
Most cited
By later US patents