F02B 33/12
The rear face of working piston acting as pumping member and co-operating
Official title: the rear face of working piston acting as pumping member and co-operating with a pumping chamber isolated from crankcase, the connecting-rod passing through the chamber and co-operating with movable isolating member
F02B33/12 (The rear face of working piston acting as pumping member and co-operating) appears on 41 US grants and 38 published applications in this corpus.
Search patents in F02B- Granted patents
- 41
- Published applications
- 38
- Assignees
- 16
- Inventors
- 52
- Latest grant
- 27 Sep 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 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 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 0 | 1 |
| 2004 | 4 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 1 | 1 |
| 2008 | 1 | 2 |
| 2009 | 2 | 5 |
| 2010 | 1 | 4 |
| 2011 | 1 | 2 |
| 2012 | 4 | 3 |
| 2013 | 3 | 3 |
| 2014 | 3 | 1 |
| 2015 | 0 | 0 |
| 2016 | 3 | 1 |
| 2017 | 0 | 2 |
| 2018 | 0 | 4 |
| 2019 | 2 | 0 |
| 2020 | 3 | 0 |
| 2021 | 1 | 4 |
| 2022 | 3 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
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- A two stroke engine with valves actuated by air pressure near bottom dead center23 Sep 2021US 2021/0293177 A1
- Optimal Efficiency Internal Combustion Engine5 Aug 2021US 2021/0239039 A1Creed Engines, LLC
- Internal Combustion Engine25 Mar 2021US 2021/0087996 A1Coutts Industries Inc.
- Two-stroke internal combustion engine with crankcase lubrication system6 Dec 2018US 2018/0347415 A9
Most cited
By later US patents
- Internal combustion engine50US 7,469,664 B2Advanced Propulsion Technologies, Inc. · 2008
- Self-supercharging dual piston engine apparatus26US 4,185,597 A1980
- Two-cycle internal combustion engine24US 5,791,303 A1998
- Double intake, supercharging I.C. engine19US 4,332,229 A1982
- Hybrid electric powertrain19US 6,834,626 B1General Motors Corporation · 2004