F01L 7/04
Surrounding working cylinder or piston
Official title: surrounding working cylinder or piston
F01L7/04 (Surrounding working cylinder or piston) appears on 52 US grants and 43 published applications in this corpus.
Search patents in F01L- Granted patents
- 52
- Published applications
- 43
- Assignees
- 27
- Inventors
- 57
- Latest grant
- 27 Jun 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 1 | 3 |
| 2008 | 3 | 4 |
| 2009 | 4 | 5 |
| 2010 | 1 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 6 |
| 2013 | 2 | 2 |
| 2014 | 4 | 3 |
| 2015 | 2 | 4 |
| 2016 | 1 | 0 |
| 2017 | 3 | 0 |
| 2018 | 1 | 1 |
| 2019 | 2 | 1 |
| 2020 | 1 | 3 |
| 2021 | 1 | 1 |
| 2022 | 5 | 4 |
| 2023 | 4 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Engine with gas exchange through piston rod27 Jun 2023US 11,686,199 B2Aquarius Engines (A.M.) Ltd.
- Internal combustion engine valve system and method11 Apr 2023US 11,624,300 B2
- Vessel valve with purge feature11 Apr 2023US 11,624,446 B1Dynamic Ratings, Inc.
- Internal combustion engine valve system and method10 Jan 2023US 11,549,409 B2
- Valve timing system and method8 Nov 2022US 11,492,933 B2
- Distribution cylinder20 Jun 2024US 2024/0200519 A1
- Internal combustion engine valve system and method24 Nov 2022US 2022/0372897 A1Lse R&D Engineering Limited
- Internal combustion engine valve system and method17 Nov 2022US 2022/0364484 A1Lse R&D Engineering Limited
- Engine with gas exchange through piston rod8 Sep 2022US 2022/0282620 A1Aquarius Engines (A.M.) Ltd.
- Valve timing system and method28 Apr 2022US 2022/0127979 A1Lse R&D Engineering Limited
Most cited
By later US patents
- Internal combustion engine50US 7,469,664 B2Advanced Propulsion Technologies, Inc. · 2008
- Internal combustion engine40US 7,234,423 B22007
- Internal combustion engine35US 7,559,298 B2Cleeves Engines Inc. · 2009
- Rotary valve for internal-combustion engine25US 4,481,917 A1984
- Dual rotor pulse detonation apparatus25US 5,615,548 ALockheed Martin Corporation · 1997