F01C 20/12
Using sliding valves
Official title: using sliding valves
F01C20/12 (Using sliding valves) appears on 16 US grants and 14 published applications in this corpus.
Search patents in F01C- Granted patents
- 16
- Published applications
- 14
- Assignees
- 18
- Inventors
- 29
- Latest grant
- 6 Aug 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 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 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 4 |
| 2007 | 1 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Screw expander with variable volume controlled by the pressure ratio, and plant for recovering electrical energy from heat with a screw expander6 Aug 2024US 12,055,042 B2BITZER Kuehlmaschinenbau GmbH
- Screw expander with adjustable valve5 Jan 2021US 10,883,368 B2Fu Sheng Industrial Co., Ltd.
- Screw compressor having a volume ratio being adjusted by end faces extending along from a low-pressure side end wall to discharge edges of a slider24 Jul 2018US 10,030,653 B2BITZER Kuehlmaschinenbau GmbH
- Rotary piston and cylinder devices16 Jun 2015US 9,057,268 B2Lontra Limited
- Electric machine having rotor and stator configurations20 Sep 2011US 8,022,586 B2StarRotor Corporation
- Modular rotary engine1 Dec 2022US 2022/0381145 A1
- Screw expander, and plant for recovering electrical energy from heat with a screw expander16 Dec 2021US 2021/0388834 A1BITZER Kuehlmaschinenbau GmbH
- Screw expander27 Dec 2018US 2018/0371934 A1Fu Sheng Industrial Co., Ltd.
- Screw Compressor8 May 2014US 2014/0127067 A1BITZER Kuehlmaschinenbau GmbH
- Electric machine having a high-torque switched reluctance motor26 Aug 2010US 2010/0213786 A1StarRotor Corporation
Most cited
By later US patents
- Rotary vane motor23US 6,886,527 B2Rare Industries Inc. · 2005
- Toroidal engine with variable displacement volume21US 7,341,041 B2VGT Technologies, Inc. · 2008
- Rotary screw machine with two intermeshing gate rotors and two independently controlled gate regulating valves18US 4,261,691 AHall-Thermotank Products Limited · 1981
- Multi-step regenerated organic fluid helical screw expander hermetic induction generator system16US 4,185,465 ADunham-Bush, Inc. · 1980
- Screw compressors14US 4,074,957 AMonovis B. V. · 1978