F01L 5/20
Slide valve-gear or valve-arrangements: specially for two-stroke engines
Official title: specially for two-stroke engines (F01L5/06, F01L5/14 take precedence)
F01L5/20 (Slide valve-gear or valve-arrangements: specially for two-stroke engines) appears on 17 US grants and 16 published applications in this corpus.
Search patents in F01L- Granted patents
- 17
- Published applications
- 16
- Assignees
- 7
- Inventors
- 29
- Latest grant
- 24 Oct 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 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 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 2 |
| 2016 | 1 | 1 |
| 2017 | 0 | 2 |
| 2018 | 1 | 2 |
| 2019 | 2 | 1 |
| 2020 | 1 | 1 |
| 2021 | 2 | 1 |
| 2022 | 2 | 1 |
| 2023 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Motorcycle engine with an always spring biased open exhaust valve24 Oct 2023US 11,795,859 B2
- Motorcycle engine with an always spring biased open exhaust valve13 Dec 2022US 11,525,383 B2
- Internal combustion engine valve system and method1 Nov 2022US 11,486,275 B2
- Turbocharger for an internal combustion engine28 Sep 2021US 11,131,242 B2Brp-Rotax GmbH & Co. KG
- Rotational valve for two stroke engine9 Feb 2021US 10,914,205 B2
- Motorcycle engine with an always spring biased open exhaust valve16 Feb 2023US 2023/0052834 A1
- Internal combustion engine valve system and method28 Apr 2022US 2022/0127977 A1Lse R&D Engineering Limited
- Turbocharger for an internal combustion engine14 Jan 2021US 2021/0010420 A1Brp-Rotax GmbH & Co. KG
- Motorcycle engine with an always spring biased open exhaust valve30 Jul 2020US 2020/0240313 A1
- Exhaust valve assembly for a two-stroke internal combustion engine and method for cleaning same3 Jan 2019US 2019/0003350 A1Brp-Rotax GmbH & Co. KG
Most cited
By later US patents
- Internal combustion engine comprising means for controlling the axial extent of an exhaust port in a cylinder31US 4,399,788 ABombardier-Rotax Gesellschaft m.b.H. · 1983
- Exhaust valve assembly for a two-stroke engine9US 9,404,399 B2Brp-Rotax GmbH & Co. KG · 2016
- Exhaust-outlet control for 2-stroke engine7US 7,213,544 B2Brp-Rotax GmbH & Co. KG · 2007
- Four-stroke internal combustion engine6US 6,467,455 B12002
- Exhaust valve assembly for a two-stroke internal combustion engine and method for cleaning same4US 10,113,452 B2Brp-Rotax GmbH & Co. KG · 2018