F01L 2003/25
Valve configurations in relation to engine
Official title: {Valve configurations in relation to engine}
F01L2003/25 (Valve configurations in relation to engine) appears on 181 US grants and 143 published applications in this corpus.
Search patents in F01L- Granted patents
- 181
- Published applications
- 143
- Assignees
- 94
- Inventors
- 358
- Latest grant
- 8 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 11 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 4 |
| 2003 | 3 | 2 |
| 2004 | 1 | 5 |
| 2005 | 7 | 4 |
| 2006 | 4 | 5 |
| 2007 | 4 | 10 |
| 2008 | 4 | 10 |
| 2009 | 8 | 14 |
| 2010 | 7 | 16 |
| 2011 | 6 | 7 |
| 2012 | 10 | 17 |
| 2013 | 12 | 13 |
| 2014 | 7 | 6 |
| 2015 | 8 | 1 |
| 2016 | 3 | 4 |
| 2017 | 2 | 5 |
| 2018 | 4 | 2 |
| 2019 | 3 | 5 |
| 2020 | 5 | 3 |
| 2021 | 4 | 6 |
| 2022 | 1 | 1 |
| 2023 | 4 | 1 |
| 2024 | 0 | 0 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01L 2003/258Opening away from cylinderIndexing code53
- F01L 2003/256Configured other than perpendicular to camshaft axisIndexing code42
- F01L 2003/251Large number of valvesIndexing code38
- F01L 2003/255Configured other than parallel or symmetrical relative to piston axisIndexing code17
- F01L 2003/253Configured parallel to piston axisIndexing code5
Recent patents
- Compressed-air engine with integrated active chamber and active distribution with balanced valve8 Jul 2025US 12,352,171 B2Motor Development International S.A.
- Valve for an overhead cam engine and an overhead cam engine assembly27 May 2025US 12,312,982 B1
- Internal combustion engine with at least one hollow-head valve28 Nov 2023US 11,828,207 B2Mahle International GmbH
- Multi-valve22 Aug 2023US 11,732,621 B2Dr. Ing. h,c.F. Porsche Aktiengesellschaft
- Device and method for cold testing engine component operation9 May 2023US 11,644,384 B2Ford Motor Company
- Engine13 Aug 2026US 2026/0235053 A1Ishikawa Energy Research Co., Ltd.
- Multifuel closed-loop thermal cycle piston engine, system and method5 Jun 2025US 2025/0179967 A1Engine Development Corp, LLC
- Compressed-air engine with integrated active chamber and active distribution with balanced valve21 Dec 2023US 2023/0407747 A1Motor Development International S.A.
- Multi-valve27 Oct 2022US 2022/0341350 A1Dr. Ing. h,c.F. Porsche Aktiengesellschaft
- Scavenger Valve Method and Device23 Dec 2021US 2021/0396163 A1Compressor Engineering Corporation
Most cited
By later US patents
- Harmonic engine70US 7,603,858 B2Lawrence Livermore National Security, LLC · 2009
- Cold air super-charged internal combustion engine, working cycle and method69US 6,951,211 B22005
- Passive valve assembly64US 6,883,775 B2innogy SE · 2005
- Compact pressure swing reformer54US 8,551,444 B2Air Products and Chemicals, Inc. · 2013
- Four-stroke Otto engine having hybrid control51US 5,647,312 AFEV Motorentechnik GmbH & Co. Kommanditgesellschaft · 1997