F04C 2/24
Rotary-piston machines or pumps: 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
F04C2/24 (Rotary-piston machines or pumps: of counter-engagement type, i.e. the movement of co-operating) appears on 11 US grants and 11 published applications in this corpus.
Search patents in F04C- Granted patents
- 11
- Published applications
- 11
- Assignees
- 9
- Inventors
- 24
- Latest grant
- 26 Sep 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 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 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 2 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 1 |
| 2015 | 1 | 5 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Electric pump actuator, stepless transmission with electric pump actuator and control method for an electric pump actuator26 Sep 2023US 11,767,842 B2Schaeffler Technologies AG & Co. KG
- Metering pump made of plastic28 Aug 2018US 10,060,431 B2Robert Bosch GmbH
- Rotary-piston engine26 Sep 2017US 9,771,934 B2
- Rotary compressor having gate axially movable with respect to rotor13 Sep 2016US 9,441,629 B2Torad Engineering, LLC
- Rotary three dimensional variable volume machine8 Dec 2015US 9,206,801 B2
- Electric pump actuator, stepless transmission with electric pump actuator and control method for an electric pump actuator16 Sep 2021US 2021/0285442 A1Schaeffler Technologies AG & Co. KG
- Hollow rotor lobe and control of tip deflection4 Jul 2019US 2019/0203708 A1Eaton Intelligent Power Limited
- Valve device for a hydraulic circuit, and oil pump control assembly21 May 2015US 2015/0139840 A1Pierburg GmbH
- Rotary-piston engine2 Apr 2015US 2015/0093278 A1
- Electric oil pump26 Mar 2015US 2015/0086405 A1Aisin Aw Co., Ltd.
Most cited
By later US patents
- Self-scraping mixers7US 4,188,131 AAgence Nationale de Valorisation de la Recherche (ANVAR) · 1980
- Rotary fluid-displacement assembly5US 8,113,805 B2Torad Engineering, LLC · 2012
- Multiphase pump with high compression ratio4US 8,562,318 B1Exponential Technologies, Inc. · 2013
- Rotary pump apparatus with plural abutting pumping segments3US 4,385,874 A1983
- Rotary compressor having gate axially movable with respect to rotor2US 8,177,536 B22012