F01L 11/00
Valve arrangements in working piston or piston-rod
F01L11/00 (Valve arrangements in working piston or piston-rod) appears on 54 US grants and 36 published applications in this corpus.
Search patents in F01L- Granted patents
- 54
- Published applications
- 36
- Assignees
- 21
- Inventors
- 57
- Latest grant
- 4 Jul 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 3 | 1 |
| 2004 | 1 | 2 |
| 2005 | 4 | 7 |
| 2006 | 1 | 3 |
| 2007 | 5 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 3 |
| 2010 | 0 | 1 |
| 2011 | 0 | 2 |
| 2012 | 1 | 2 |
| 2013 | 1 | 1 |
| 2014 | 5 | 3 |
| 2015 | 3 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 2 |
| 2018 | 2 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 2 | 3 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Linear combustion engines with valve in piston4 Jul 2023US 11,692,478 B2Intelline Inc.
- Internal combustion engine22 Mar 2022US 11,280,293 B2Coutts Industries Inc.
- Internal combustion engine6 Jul 2021US 11,053,884 B2Coutts Industries Inc.
- Enhanced piston for improving the efficiency of an internal combustion engine13 Apr 2021US 10,975,798 B2
- Overhead sliding rotary valve assembly and method of use8 Sep 2020US 10,767,521 B1
- Valved-piston and actuator with recycled combustion4 Dec 2025US 2025/0369373 A1
- Linear combustion engines with valve in piston23 Feb 2023US 2023/0058375 A1Intelline Inc.
- Internal Combustion Engine18 Nov 2021US 2021/0355892 A1Coutts Industries Inc.
- Internal Combustion Engine25 Mar 2021US 2021/0087996 A1Coutts Industries Inc.
- Enhanced piston for improving the efficiency of an internal combustion engine18 Feb 2021US 2021/0047982 A1
Most cited
By later US patents
- Two-way rotary supercharged, variable compression engine43US 5,437,251 A1995
- Internal combustion engine37US 5,261,358 AAardvark Pty Ltd. · 1993
- Internal combustion engine machine incorporating significant improvements in power, efficiency and emissions control35US 7,104,227 B22006
- Dual compression and dual expansion internal combustion engine and method therefor31US 5,542,382 ACaterpillar Inc. · 1996
- Two-stroke cycle engine having linear gear drive30US 5,158,046 A1992