F01C 3/00
Rotary-piston machines or engines with non-parallel axes of movement of co-operating members
Official title: Rotary-piston machines or engines with non-parallel axes of movement of co-operating members (with the working-chamber walls being at least partly resiliently deformable F01C5/00)
F01C3/00 (Rotary-piston machines or engines with non-parallel axes of movement of co-operating members) appears on 176 US grants and 105 published applications in this corpus.
Search patents in F01C- Granted patents
- 176
- Published applications
- 105
- Assignees
- 51
- Inventors
- 149
- Latest grant
- 31 Dec 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 7 | 0 |
| 1978 | 2 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 8 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 7 | 3 |
| 2002 | 4 | 5 |
| 2003 | 8 | 3 |
| 2004 | 5 | 4 |
| 2005 | 3 | 9 |
| 2006 | 2 | 8 |
| 2007 | 6 | 4 |
| 2008 | 3 | 4 |
| 2009 | 3 | 5 |
| 2010 | 4 | 13 |
| 2011 | 1 | 2 |
| 2012 | 3 | 4 |
| 2013 | 3 | 4 |
| 2014 | 6 | 4 |
| 2015 | 6 | 4 |
| 2016 | 2 | 0 |
| 2017 | 4 | 6 |
| 2018 | 3 | 4 |
| 2019 | 4 | 7 |
| 2020 | 4 | 3 |
| 2021 | 4 | 2 |
| 2022 | 6 | 3 |
| 2023 | 4 | 1 |
| 2024 | 3 | 2 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Rotary positive displacement device31 Dec 2024US 12,180,960 B2Spherical Rotors Inc.
- External combustion rotary engine4 Jun 2024US 12,000,287 B2
- Rotary piston and cylinder device with single stator side2 Jan 2024US 11,859,495 B2Lontra Limited
- Air-fuel system for a circulating piston engine8 Aug 2023US 11,719,187 B2WB Development Company, LLC
- Sliding vane fluid pump27 Jun 2023US 11,686,200 B2Delphi Technologies IP Limited
- Rotary positive displacement device24 Apr 2025US 2025/0129778 A1Spherical Rotors Inc.
- Rotary positive displacement device21 Nov 2024US 2024/0384720 A1Spherical Rotors Inc.
- Concentric rotary machine5 Sep 2024US 2024/0295174 A1
- External combustion rotary engine3 Aug 2023US 2023/0243261 A1
- Air-fuel system for a circulating piston engine15 Sep 2022US 2022/0290629 A1WB Development Company, LLC
Most cited
By later US patents
- Rotary positive displacement engine39US 5,755,196 AOutland Design Technologies, Inc. · 1998
- Rotary positive displacement engine29US 6,036,463 AOutland Technologies (USA), Inc. · 2000
- Variable geometry toroidal engine27US 6,546,908 B1VGT Technologies, Inc. · 2003
- Rotary engine and method for determining engagement surface contours therefor24US 6,739,852 B1Outland Technologies (USA), Inc. · 2004
- Spherical fluid pump or motor with spherical ball comprising two parts21US 5,199,864 ASouthwest Research Institute · 1993