F01C 1/24
Rotary-piston machines or engines: of counter-engagement type, i.e. the movement of co-operating
Official title: of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions
F01C1/24 (Rotary-piston machines or engines: of counter-engagement type, i.e. the movement of co-operating) appears on 51 US grants and 32 published applications in this corpus.
Search patents in F01C- Granted patents
- 51
- Published applications
- 32
- Assignees
- 22
- Inventors
- 71
- Latest grant
- 13 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 2 |
| 2005 | 2 | 0 |
| 2006 | 1 | 2 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 2 | 4 |
| 2010 | 2 | 3 |
| 2011 | 1 | 0 |
| 2012 | 1 | 1 |
| 2013 | 1 | 3 |
| 2014 | 0 | 1 |
| 2015 | 3 | 4 |
| 2016 | 3 | 1 |
| 2017 | 2 | 0 |
| 2018 | 1 | 1 |
| 2019 | 3 | 3 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 2 | 1 |
| 2023 | 1 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Planetary rotor machine with double sheer synchronizing mechanism18 Jun 2026US 2026/0168381 A1Radius 1, LLC
- Rotary motor with integral fluid seal27 Nov 2025US 2025/0361808 A1Coool.Energy Ltd
- Rotary Machine5 May 2022US 2022/0136392 A1
- Magnetically engaged pump12 Sep 2019US 2019/0277283 A1Wilden Pump & Engineering Co.
- Hollow rotor lobe and control of tip deflection4 Jul 2019US 2019/0203708 A1Eaton Intelligent Power Limited
Most cited
By later US patents
- Rotary internal combustion engine25US 4,934,325 A1990
- Positive displacement rotary devices with uniquely configured voids20US 9,664,047 B2Mallen Research Limited Partnership · 2017
- Rotary engine with pistons and lenticular valves18US 4,083,663 A1978
- Planetary rotary engine18US 8,356,585 B2Planetary Rotor Engine Company · 2013
- Rotary internal combustion engine17US 5,341,782 A1994