F02B 55/00
Internal-combustion aspects of rotary pistons
Official title: Internal-combustion aspects of rotary pistons; Outer members for co-operation with rotary pistons
F02B55/00 (Internal-combustion aspects of rotary pistons) appears on 428 US grants and 330 published applications in this corpus.
Search patents in F02B- Granted patents
- 428
- Published applications
- 330
- Assignees
- 123
- Inventors
- 523
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 29 | 0 |
| 1977 | 22 | 0 |
| 1978 | 24 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 8 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 3 | 4 |
| 2004 | 0 | 4 |
| 2005 | 5 | 5 |
| 2006 | 2 | 3 |
| 2007 | 0 | 1 |
| 2008 | 3 | 11 |
| 2009 | 4 | 4 |
| 2010 | 1 | 5 |
| 2011 | 4 | 14 |
| 2012 | 3 | 7 |
| 2013 | 12 | 17 |
| 2014 | 12 | 20 |
| 2015 | 12 | 22 |
| 2016 | 21 | 25 |
| 2017 | 17 | 27 |
| 2018 | 23 | 23 |
| 2019 | 17 | 13 |
| 2020 | 21 | 24 |
| 2021 | 26 | 22 |
| 2022 | 21 | 16 |
| 2023 | 19 | 15 |
| 2024 | 26 | 14 |
| 2025 | 15 | 23 |
| 2026 | 7 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Aircraft power plant with heat management system15 Sep 2026US 12,736,005 B2Pratt & Whitney Canada Corp.
- Fretting resistant rotary engine housings18 Aug 2026US 12,709,983 B2Pratt & Whitney Canada Corp.
- Laminated universal effort machine30 Jun 2026US 12,669,081 B1
- Rotary machine5 May 2026US 12,618,328 B2Lumenium LLC
- Method of assembling parts with different coefficients of thermal expansion24 Feb 2026US 12,558,747 B2Pratt & Whitney Canada Corp.
- Rotary internal combustion engine with integrated pump8 Oct 2026US 2026/0309074 A1Pratt & Whitney Canada Corp.
- Rotational Engine With Inner and Outer Rings17 Sep 2026US 2026/0275867 A1Duplicent, LLC
- Rotary machine17 Sep 2026US 2026/0275868 A1Lumenium LLC
- Rotary Vane Internal Combustion Engine17 Sep 2026US 2026/0275869 A1
- High-Efficiency Rotary Engine with Perpendicular Force Transmission and Compound Energy Recovery System17 Sep 2026US 2026/0275904 A1
Most cited
By later US patents
- Rotary positive displacement device134US 5,431,551 A1995
- Thermodynamic rotary engine53US 4,553,513 A1985
- Constant pressure heating vane rotary engine52US 3,989,011 A1976
- Rotary energy converter with respiring chambers40US 4,106,472 A1978
- Precombustion chamber rotary piston diesel engine38US 3,957,021 ACurtiss-Wright Corporation · 1976