F02B 57/00
Internal-combustion aspects of rotary engines in which the combusted gases displace one
Official title: Internal-combustion aspects of rotary engines in which the combusted gases displace one or more reciprocating pistons
F02B57/00 (Internal-combustion aspects of rotary engines in which the combusted gases displace one) appears on 227 US grants and 106 published applications in this corpus.
Search patents in F02B- Granted patents
- 227
- Published applications
- 106
- Assignees
- 58
- Inventors
- 257
- Latest grant
- 22 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 15 | 0 |
| 1978 | 10 | 0 |
| 1979 | 6 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 7 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 0 |
| 2002 | 3 | 5 |
| 2003 | 6 | 6 |
| 2004 | 4 | 12 |
| 2005 | 8 | 8 |
| 2006 | 5 | 3 |
| 2007 | 3 | 6 |
| 2008 | 4 | 2 |
| 2009 | 4 | 6 |
| 2010 | 3 | 5 |
| 2011 | 2 | 5 |
| 2012 | 7 | 3 |
| 2013 | 3 | 4 |
| 2014 | 3 | 5 |
| 2015 | 5 | 5 |
| 2016 | 6 | 3 |
| 2017 | 5 | 4 |
| 2018 | 3 | 4 |
| 2019 | 1 | 0 |
| 2020 | 2 | 8 |
| 2021 | 4 | 3 |
| 2022 | 9 | 4 |
| 2023 | 2 | 3 |
| 2024 | 2 | 1 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Hydrogen-oxygen cycle engine and using method therefor22 Jul 2025US 12,366,198 B2
- Epicyclic rotary engine14 Jan 2025US 12,196,127 B1
- Bearing device for radial piston machine25 Jun 2024US 12,018,566 B2Daido Metal Company Ltd.
- System for the reversible transformation of a reciprocating motion in a rotary motion28 May 2024US 11,994,030 B2Ibs Motortech Italia Srl
- Rotary engine11 Jul 2023US 11,697,993 B1
- Rotational engine18 Sep 2025US 2025/0290419 A1Duplicent, LLC
- Hydrogen-oxygen cycle engine and using method therefor2 May 2024US 2024/0141825 A1
- Method for operating a gas engine with fuel supply device with selection option for direct injection and/or air path injection of fuel21 Sep 2023US 2023/0296052 A1Liebherr Machines Bulle SA
- System for the reversible transformation of a reciprocating motion in a rotary motion23 Feb 2023US 2023/0059790 A1Ibs Motortech Italia Srl
- Internal combustion engine with rotating pistons and cylinders and related devices and methods of using the same2 Feb 2023US 2023/0036422 A1
Most cited
By later US patents
- Rotary engine expansion chamber apparatus and method of operation therefor140US 8,523,547 B22013
- Rotary and reciprocating internal combustion engine and compressor104US 5,875,744 A1999
- Rotary engine95US 5,080,050 A1992
- Axial-piston combustion engine37US 3,939,809 A1976
- Rotary cam internal combustion radial engine37US 3,964,450 A1976