F02B 55/08
Outer members for co-operation with rotary pistons
Official title: Outer members for co-operation with rotary pistons; Casings
F02B55/08 (Outer members for co-operation with rotary pistons) appears on 177 US grants and 161 published applications in this corpus.
Search patents in F02B- Granted patents
- 177
- Published applications
- 161
- Assignees
- 60
- Inventors
- 233
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 9 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 2 | 3 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 3 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 2 |
| 2012 | 0 | 3 |
| 2013 | 0 | 3 |
| 2014 | 0 | 6 |
| 2015 | 5 | 11 |
| 2016 | 11 | 15 |
| 2017 | 6 | 10 |
| 2018 | 8 | 12 |
| 2019 | 10 | 7 |
| 2020 | 13 | 10 |
| 2021 | 16 | 15 |
| 2022 | 12 | 8 |
| 2023 | 10 | 10 |
| 2024 | 17 | 12 |
| 2025 | 14 | 20 |
| 2026 | 6 | 9 |
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.
- 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 piston machine3 Feb 2026US 12,540,572 B2
- 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 internal combustion engine with pilot subchamber22US 9,528,434 B1Pratt & Whitney Canada Corp. · 2016
- Rotary engine cooling system20US 4,759,325 ADeere & Company · 1988
- Valveless two-stroke-cycle oscillating engine17US 5,228,414 A1993
- Rotary internal combustion engine with pilot subchamber16US 9,038,594 B2Pratt & Whitney Canada Corp. · 2015
- Rotary engine15US 4,010,716 A1977