F01C 20/14
Using rotating valves
Official title: using rotating valves
F01C20/14 (Using rotating valves) appears on 31 US grants and 25 published applications in this corpus.
Search patents in F01C- Granted patents
- 31
- Published applications
- 25
- Assignees
- 15
- Inventors
- 53
- Latest grant
- 1 Mar 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 3 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 2 | 4 |
| 2015 | 2 | 6 |
| 2016 | 2 | 4 |
| 2017 | 2 | 0 |
| 2018 | 2 | 2 |
| 2019 | 3 | 2 |
| 2020 | 1 | 0 |
| 2021 | 2 | 0 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Four-stroke rotary- piston engine with adjustable compression ratio and adjustable valve control times1 Mar 2022US 11,261,733 B2
- Circulating piston engine having a rotary valve assembly24 Aug 2021US 11,098,588 B2WB Development Company, LLC
- Direct port commutator and manifold assembly16 Mar 2021US 10,947,848 B2Parker-Hannifin Corporation
- Reversing mechanism for a power tool17 Mar 2020US 10,590,770 B2Snap-on Incorporated
- Rotary expansible chamber devices and systems incorporating the same12 Nov 2019US 10,472,966 B2
- Circulating piston engine having a rotary valve assembly8 Aug 2019US 2019/0242259 A1WB Development Company, LLC
- Rotary steam motor25 Apr 2019US 2019/0120054 A1
- Direct port commutator and manifold assembly27 Dec 2018US 2018/0371911 A1Parker-Hannifin Corporation
- Rotary-piston cylinder engine25 Oct 2018US 2018/0306033 A1
- Combustion Engine8 Dec 2016US 2016/0356213 A1
Most cited
By later US patents
- Distributor for the progressive and reversible supply of an air motor, in particular for hand-held dental instruments40US 4,344,746 ASociete Micro-Mega S.A. · 1982
- Rotary internal combustion engine34US 4,241,713 A1980
- Non-contact rotary vane gas expanding apparatus27US 5,501,586 A1996
- Screw-type compressor/expander with valves at each axial end of rotors19US 5,195,881 A1993
- Vacuum motor16US 4,236,589 A1980