F01L 7/00
Rotary or oscillatory slide valve-gear or valve arrangements
Official title: Rotary or oscillatory slide valve-gear or valve arrangements (slide valves with combined rotary and non-rotary movements, combinations of rotary and non-rotary slide valves F01L5/00)
F01L7/00 (Rotary or oscillatory slide valve-gear or valve arrangements) appears on 574 US grants and 330 published applications in this corpus.
Search patents in F01L- Granted patents
- 574
- Published applications
- 330
- Assignees
- 180
- Inventors
- 661
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 11 | 0 |
| 1978 | 10 | 0 |
| 1979 | 6 | 0 |
| 1980 | 8 | 0 |
| 1981 | 2 | 0 |
| 1982 | 6 | 0 |
| 1983 | 10 | 0 |
| 1984 | 10 | 0 |
| 1985 | 12 | 0 |
| 1986 | 10 | 0 |
| 1987 | 6 | 0 |
| 1988 | 13 | 0 |
| 1989 | 22 | 0 |
| 1990 | 14 | 0 |
| 1991 | 16 | 0 |
| 1992 | 15 | 0 |
| 1993 | 15 | 0 |
| 1994 | 15 | 0 |
| 1995 | 9 | 0 |
| 1996 | 17 | 0 |
| 1997 | 10 | 0 |
| 1998 | 8 | 0 |
| 1999 | 16 | 0 |
| 2000 | 10 | 0 |
| 2001 | 12 | 2 |
| 2002 | 6 | 6 |
| 2003 | 8 | 10 |
| 2004 | 14 | 14 |
| 2005 | 7 | 12 |
| 2006 | 14 | 15 |
| 2007 | 11 | 27 |
| 2008 | 19 | 26 |
| 2009 | 13 | 13 |
| 2010 | 16 | 18 |
| 2011 | 6 | 9 |
| 2012 | 9 | 18 |
| 2013 | 14 | 15 |
| 2014 | 13 | 18 |
| 2015 | 9 | 14 |
| 2016 | 14 | 15 |
| 2017 | 12 | 21 |
| 2018 | 15 | 12 |
| 2019 | 16 | 13 |
| 2020 | 11 | 20 |
| 2021 | 15 | 8 |
| 2022 | 22 | 11 |
| 2023 | 8 | 4 |
| 2024 | 3 | 3 |
| 2025 | 6 | 5 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01L 7/02Rotary or oscillatory slide valve-gear or valve arrangements: with cylindrical, sleeve, or400
- F01L 7/16Sealing or packing arrangements specially therefor171
- F01L 7/10Rotary or oscillatory slide valve-gear or valve arrangements: with valves of other70
- F01L 7/06Rotary or oscillatory slide valve-gear or valve arrangements: with disc type valves65
- F01L 7/12Rotary or oscillatory slide valve-gear or valve arrangements: specially for two-stroke engines56
- F01L 7/18Component parts, details, or accessories not provided for in preceding subgroups of53
- F01L 7/08Rotary or oscillatory slide valve-gear or valve arrangements: with conically or frusto-conically27
- F01L 7/14Multiple-valve arrangements21
Recent patents
- Rotary flow control apparatus19 May 2026US 12,631,082 B1Tempress Technologies, Inc.
- Multi-port exhaust valve17 Feb 2026US 12,553,402 B2Arctic Cat Inc.
- 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 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
- Plate valve four stroke head18 Sep 2025US 2025/0290434 A1
Most cited
By later US patents
- Rotary and reciprocating internal combustion engine and compressor104US 5,875,744 A1999
- Compact pressure swing reformer54US 8,551,444 B2Air Products and Chemicals, Inc. · 2013
- 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