F02B 55/04
Cooling thereof
F02B55/04 (Cooling thereof) appears on 29 US grants and 17 published applications in this corpus.
Search patents in F02B- Granted patents
- 29
- Published applications
- 17
- Assignees
- 14
- Inventors
- 44
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 6 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 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 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 3 | 1 |
| 2014 | 0 | 3 |
| 2015 | 0 | 1 |
| 2016 | 3 | 1 |
| 2017 | 2 | 1 |
| 2018 | 1 | 2 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Rotary combustion engine with integrated multistage fuel system6 Jan 2026US 12,516,623 B2
- Seal assembly for an epitrochoidal rotary engine19 Oct 2021US 11,149,547 B2LiquidPiston, Inc.
- Circle ellipse engine25 Feb 2020US 10,570,739 B2
- Internal combustion engine13 Nov 2018US 10,125,675 B2LiquidPiston, Inc.
- Rotary internal combustion engine28 Nov 2017US 9,828,907 B2
- Rotary combustion engine with integrated multistage fuel system15 Aug 2024US 2024/0271560 A1
- Rotary piston engine15 Feb 2024US 2024/0052775 A1Winkelmann Wankel GmbH
- Rotary piston engine having optimized internal cooling of intake air4 Aug 2022US 2022/0243645 A1
- Circle ellipse engine6 Dec 2018US 2018/0347363 A1
- High Power Density and Efficiency Epitrochoidal Rotary Engine25 Jan 2018US 2018/0023392 A1LiquidPiston, Inc.
Most cited
By later US patents
- Rotary engine12US 6,606,973 B22003
- System for liquid cooling of a rotor or a rotary mechanism10US 4,011,032 AAudi NSU Auto Union Aktiengesellschaft · 1977
- Rotor for a rotary engine10US 4,486,159 ANorton Motors (1978) Limited · 1984
- System for cooling the rotary engine rotor10US 4,898,522 ATeledyne Industries, Inc. · 1990
- Rotary engine and method9US 5,072,705 A1991