F01L 7/14
Multiple-valve arrangements
Official title: Multiple-valve arrangements (with valves surrounding working cylinder or piston F01L7/04; specially for two-stroke engines F01L7/12)
F01L7/14 (Multiple-valve arrangements) appears on 21 US grants and 19 published applications in this corpus.
Search patents in F01L- Granted patents
- 21
- Published applications
- 19
- Assignees
- 10
- Inventors
- 23
- Latest grant
- 11 Apr 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 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 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 1 | 4 |
| 2020 | 3 | 1 |
| 2021 | 1 | 1 |
| 2022 | 3 | 4 |
| 2023 | 3 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Internal combustion engine valve system and method11 Apr 2023US 11,624,300 B2
- Internal combustion engine valve system and method7 Mar 2023US 11,598,229 B2
- Internal combustion engine valve system and method10 Jan 2023US 11,549,409 B2
- Valve timing system and method8 Nov 2022US 11,492,933 B2
- Apparatus and method for valve timing in an internal combustion engine2 Aug 2022US 11,401,840 B2
- Plate valve four stroke head18 Sep 2025US 2025/0290434 A1
- Distribution cylinder20 Jun 2024US 2024/0200519 A1
- Internal combustion engine valve system and method1 Dec 2022US 2022/0381164 A1Lse R&D Engineering Limited
- 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
Most cited
By later US patents
- Engine part27US 4,538,562 ANGK Insulators, Ltd. · 1985
- Rotary-poppet valve internal combustion engine24US 4,075,986 A1978
- Sliding valve aspiration system18US 8,210,147 B2Grace Capital Partners, LLC · 2012
- Sliding valve aspiration17US 8,459,227 B2Grace Capital Partners, LLC · 2013
- Internal combustion engine9US 4,461,151 AKanesaka Technical Institute Ltd. · 1984