F01L 7/02
Rotary or oscillatory slide valve-gear or valve arrangements: with cylindrical, sleeve, or
Official title: with cylindrical, sleeve, or part-annularly shaped valves (of disc type F01L7/06; of conical type F01L7/08)
F01L7/02 (Rotary or oscillatory slide valve-gear or valve arrangements: with cylindrical, sleeve, or) appears on 400 US grants and 246 published applications in this corpus.
Search patents in F01L- Granted patents
- 400
- Published applications
- 246
- Assignees
- 115
- Inventors
- 417
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 7 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 8 | 0 |
| 1987 | 4 | 0 |
| 1988 | 8 | 0 |
| 1989 | 10 | 0 |
| 1990 | 8 | 0 |
| 1991 | 5 | 0 |
| 1992 | 12 | 0 |
| 1993 | 9 | 0 |
| 1994 | 7 | 0 |
| 1995 | 7 | 0 |
| 1996 | 13 | 0 |
| 1997 | 8 | 0 |
| 1998 | 6 | 0 |
| 1999 | 15 | 0 |
| 2000 | 6 | 0 |
| 2001 | 9 | 2 |
| 2002 | 5 | 6 |
| 2003 | 8 | 7 |
| 2004 | 11 | 12 |
| 2005 | 5 | 9 |
| 2006 | 13 | 13 |
| 2007 | 7 | 22 |
| 2008 | 16 | 24 |
| 2009 | 12 | 9 |
| 2010 | 13 | 11 |
| 2011 | 5 | 8 |
| 2012 | 8 | 12 |
| 2013 | 8 | 11 |
| 2014 | 10 | 13 |
| 2015 | 6 | 12 |
| 2016 | 6 | 8 |
| 2017 | 10 | 18 |
| 2018 | 15 | 10 |
| 2019 | 14 | 8 |
| 2020 | 8 | 12 |
| 2021 | 10 | 6 |
| 2022 | 15 | 5 |
| 2023 | 4 | 1 |
| 2024 | 1 | 2 |
| 2025 | 5 | 4 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01L 7/021With one rotary valve163
- F01L 7/026With two or more rotary valves, their rotational axes being parallel118
- F01L 7/04Surrounding working cylinder or piston52
- F01L 7/027With two or more valves arranged coaxially38
- F01L 7/028Having the rotational axis coaxial with the cylinder axis and the valve31
- F01L 7/029Having the rotational axis of the valve parallel to the cylinder axis19
Recent patents
- Opposed-piston internal combustion engine25 Nov 2025US 12,480,439 B2Umu Devising LLC
- Combustion injection and control method for rotary valve engine4 Nov 2025US 12,460,563 B2King Fahd University of Petroleum and Minerals
- Fuel injected independent rotary valve engine28 Oct 2025US 12,454,899 B1King Fahd University of Petroleum and Minerals
- Engine and method of operating the same30 Sep 2025US 12,429,003 B2Alpha-Otto Technologies Inc.
- Independent rotary valve engine22 Jul 2025US 12,366,183 B1King Fahd University of Petroleum and Minerals
- Engine and method of operating the same1 Jan 2026US 2026/0002480 A1Alpha-Otto Technologies Inc.
- Fuel injected independent rotary valve engine30 Oct 2025US 2025/0334062 A1King Fahd University of Petroleum and Minerals
- Combustion injection and control method for rotary valve engine30 Oct 2025US 2025/0334063 A1King Fahd University of Petroleum and Minerals
- Opposed-piston internal combustion engine2 Oct 2025US 2025/0305446 A1Umu Devising LLC
- Engine and method of operating the same27 Mar 2025US 2025/0101925 A1Alpha-Otto Technologies Inc.
Most cited
By later US patents
- Rotary and reciprocating internal combustion engine and compressor104US 5,875,744 A1999
- Rolled electroactive polymers52US 7,233,097 B2SRI International · 2007
- Internal combustion engine50US 7,469,664 B2Advanced Propulsion Technologies, Inc. · 2008
- Stratified charge engine49US 3,948,227 A1976
- Exhaust valve arrangement and a fuel system incorporating an exhaust valve arrangement48US 7,533,656 B2Delphi Technologies, Inc. · 2009