F02B 33/14
Working and pumping pistons forming stepped piston
Official title: working and pumping pistons forming stepped piston
F02B33/14 (Working and pumping pistons forming stepped piston) appears on 40 US grants and 13 published applications in this corpus.
Search patents in F02B- Granted patents
- 40
- Published applications
- 13
- Assignees
- 16
- Inventors
- 45
- Latest grant
- 7 Jun 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 1 |
| 2003 | 0 | 2 |
| 2004 | 1 | 1 |
| 2005 | 3 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 2 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 2 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Four-stroke relative motion cylinder with dedicated compression space7 Jun 2022US 11,352,942 B2
- Two-cycle motor31 May 2022US 11,346,277 B1
- Multi-cylinder opposed stepped piston engine17 Oct 2017US 9,790,846 B2OSP Engines Limited
- Turbocompound free piston linear alternator20 May 2014US 8,729,717 B2GM Global Technology Operations LLC
- Opposed free piston linear alternator31 Dec 2013US 8,616,162 B2GM Global Technology Operations LLC
- Four-stroke relative motion cylinder with dedicated compression space20 Jan 2022US 2022/0018280 A1
- Internal Combustion Engine with Integrated Air Compressor19 Jan 2017US 2017/0016387 A1Tonand Inc.
- Multi-Cylinder Opposed Stepped Piston Engine31 Mar 2016US 2016/0090900 A1OSP Engines Limited
- Opposed free piston linear alternator10 May 2012US 2012/0112468 A1GM Global Technology Operations LLC
- Turbocompound free piston linear alternator10 May 2012US 2012/0112469 A1GM Global Technology Operations LLC
Most cited
By later US patents
- Internal combustion engine50US 7,469,664 B2Advanced Propulsion Technologies, Inc. · 2008
- Internal combustion engine37US 5,261,358 AAardvark Pty Ltd. · 1993
- Stepped piston and stepped piston engine27US 4,522,163 A1985
- High efficiency explosion engine with a double acting piston24US 5,816,202 A1998
- High-efficiency explosion engine provided with a double-acting piston cooperating with auxiliary feed inlet units23US 5,676,097 A1997