F02B 33/26
Four-stroke engines characterised by having crankcase pumps
F02B33/26 (Four-stroke engines characterised by having crankcase pumps) appears on 60 US grants and 41 published applications in this corpus.
Search patents in F02B- Granted patents
- 60
- Published applications
- 41
- Assignees
- 27
- Inventors
- 87
- Latest grant
- 9 Nov 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 7 |
| 2002 | 5 | 3 |
| 2003 | 7 | 0 |
| 2004 | 2 | 9 |
| 2005 | 2 | 2 |
| 2006 | 6 | 3 |
| 2007 | 3 | 3 |
| 2008 | 1 | 6 |
| 2009 | 2 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 2 | 2 |
| 2021 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Four stroke engine, handheld work apparatus having a four stroke engine, and method for operating a four stroke engine9 Nov 2021US 11,168,593 B2Andreas Stihl AG & CO.KG
- Internal combustion engine22 Jun 2021US 11,041,456 B2Quest Engines, LLC
- Mixture-lubricated four-stroke engine13 Oct 2020US 10,801,396 B2Andreas Stihl AG & CO.KG
- Systems and methods of forced air induction in internal combustion engines15 Sep 2020US 10,774,730 B2Nautilus Engineering, LLC
- Powering an internal combustion engine7 Oct 2014US 8,851,025 B2
- Systems and methods of forced air induction in internal combustion engines31 Dec 2020US 2020/0408138 A1Nautilus Engineering, LLC
- Four stroke engine, handheld work apparatus having a four stroke engine, and method for operating a four stroke engine4 Jun 2020US 2020/0173319 A1Andreas Stihl AG & CO.KG
- Mixture-lubricated four-stroke engine18 Jul 2019US 2019/0218961 A1Andreas Stihl AG & CO.KG
- Internal combustion engine4 Oct 2018US 2018/0283312 A1Quest Engines, LLC
- Systems and methods of forced air induction in internal combustion engines8 Sep 2016US 2016/0258347 A1Nautilus Engineering, LLC
Most cited
By later US patents
- Internal combustion engine83US 6,279,550 B12001
- Cold air super-charged internal combustion engine, working cycle and method69US 6,951,211 B22005
- Engine supercharged in crankcase chamber38US 6,055,959 AYamaha Hatsudoki Kabushiki Kaisha · 2000
- Crankcase-scavenged four stroke engine36US 3,973,532 A1976
- Four stroke engine having flexible arrangement28US 6,415,759 B2Bombardier-Rotax GmbH · 2002