F01C 19/12
Sealing arrangements in rotary-piston machines or engines: for other than working fluid
Official title: for other than working fluid
F01C19/12 (Sealing arrangements in rotary-piston machines or engines: for other than working fluid) appears on 69 US grants and 45 published applications in this corpus.
Search patents in F01C- Granted patents
- 69
- Published applications
- 45
- Assignees
- 58
- Inventors
- 131
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 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 | 2 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 2 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 4 |
| 2010 | 0 | 3 |
| 2011 | 1 | 4 |
| 2012 | 3 | 5 |
| 2013 | 4 | 2 |
| 2014 | 2 | 1 |
| 2015 | 2 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 2 |
| 2018 | 2 | 2 |
| 2019 | 2 | 2 |
| 2020 | 1 | 4 |
| 2021 | 3 | 4 |
| 2022 | 4 | 1 |
| 2023 | 2 | 0 |
| 2024 | 4 | 2 |
| 2025 | 1 | 3 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Rotary engine with seal having shield and elastomeric member7 Oct 2025US 12,435,661 B1Pratt & Whitney Canada Corp.
- Rotor assembly with cooling channels separated by ribs for a rotary engine31 Dec 2024US 12,180,838 B2Pratt & Whitney Canada Corp.
- High pressure gas sealing26 Nov 2024US 12,152,598 B2Dover Pumps & Process Solutions Segment, Inc.
- Methods and systems for sealing rotating equipment such as expanders or compressors22 Oct 2024US 12,123,499 B2
- Seal assembly for high pressure single screw compressor9 Jan 2024US 11,867,180 B2Copeland Industrial LP
- Rotary engine with seal having shield and elastomeric member9 Oct 2025US 2025/0314196 A1Pratt & Whitney Canada Corp.
- Methods and systems for sealing rotating equipment such as expanders or compressors27 Mar 2025US 2025/0102067 A1
- High pressure gas sealing13 Mar 2025US 2025/0084863 A1Dover Pumps & Process Solutions Segment, Inc.
- Rotor assembly with cooling channels separated by ribs for a rotary engine10 Oct 2024US 2024/0337186 A1Pratt & Whitney Canada Corp.
- High pressure gas sealing7 Mar 2024US 2024/0077083 A1Dover Pumps & Process Solutions Segment, Inc.
Most cited
By later US patents
- Rotary internal combustion engine34US 4,241,713 A1980
- Shaft seal and bearing members for a rotary screw compressor23US 5,009,583 ASvenska Rotor Maskiner AB · 1991
- Rotary vane machine with roller seals for the vanes18US 4,168,941 A1979
- Rotary expansion power unit with valve disc connected to crankshaft18US 4,297,090 ATrochoid Power Corporation · 1981
- Joint seal on the rotor drive of an eccentric screw machine12US 4,305,596 ANetzsch-Mohnopumpen GmbH · 1981