F01L 7/027
With two or more valves arranged coaxially
Official title: {with two or more valves arranged coaxially (F01L7/045 takes precedence)}
F01L7/027 (With two or more valves arranged coaxially) appears on 38 US grants and 39 published applications in this corpus.
Search patents in F01L- Granted patents
- 38
- Published applications
- 39
- Assignees
- 12
- Inventors
- 40
- Latest grant
- 30 Sep 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 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 3 | 2 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 4 |
| 2007 | 1 | 15 |
| 2008 | 8 | 0 |
| 2009 | 4 | 0 |
| 2010 | 4 | 0 |
| 2011 | 1 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 0 | 4 |
| 2017 | 1 | 1 |
| 2018 | 2 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 2 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Engine and method of operating the same30 Sep 2025US 12,429,003 B2Alpha-Otto Technologies Inc.
- Engine and method of operating the same10 Dec 2024US 12,163,480 B2Alpha-Otto Technologies Inc.
- Head assembly with rotating valves for an internal combustion engine23 Aug 2022US 11,421,563 B2Vaztec Engine Venture, LLC
- Power system with internal combustion engine12 Oct 2021US 11,143,136 B1New Generation Engines LLC
- Methods and devices for controlling the compression ratio of an opposed piston engine2 Feb 2021US 10,907,515 B2
- Engine and method of operating the same1 Jan 2026US 2026/0002480 A1Alpha-Otto Technologies Inc.
- Engine and method of operating the same27 Mar 2025US 2025/0101925 A1Alpha-Otto Technologies Inc.
- Engine and method of operating the same15 Feb 2024US 2024/0052793 A1Alpha-Otto Technologies Inc.
- Head assembly with rotating valves for an internal combustion engine17 Feb 2022US 2022/0049634 A1Vaztec Engine Venture, LLC
- Methods and Devices For Controlling The Compression Ratio of an Opposed Piston Engine30 Jan 2020US 2020/0032680 A1Warren Engine Company, Inc.
Most cited
By later US patents
- Rotary valve for internal combustion engine45US 5,205,251 AIbex Technologies Ltd. · 1993
- Rotary valve for piston engine26US 6,578,538 B22003
- Internal combustion engine24US 3,993,036 A1976
- Rotary valve apparatus for internal combustion engines and methods of operating same18US 5,706,775 ANew Avenue Development Corp. · 1998
- Rotary valve system and engine using the same18US 7,325,520 B2Zajac Optimum Output Motors, Inc. · 2008