F01C 1/02
Rotary-piston machines or engines: of arcuate-engagement type, i.e. with circular translatory movement
Official title: of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F01C1/02 (Rotary-piston machines or engines: of arcuate-engagement type, i.e. with circular translatory movement) appears on 646 US grants and 400 published applications in this corpus.
Search patents in F01C- Granted patents
- 646
- Published applications
- 400
- Assignees
- 163
- Inventors
- 862
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 13 | 0 |
| 1978 | 9 | 0 |
| 1979 | 12 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 16 | 0 |
| 1984 | 21 | 0 |
| 1985 | 11 | 0 |
| 1986 | 16 | 0 |
| 1987 | 15 | 0 |
| 1988 | 11 | 0 |
| 1989 | 11 | 0 |
| 1990 | 16 | 0 |
| 1991 | 14 | 0 |
| 1992 | 20 | 0 |
| 1993 | 16 | 0 |
| 1994 | 22 | 0 |
| 1995 | 16 | 0 |
| 1996 | 10 | 0 |
| 1997 | 8 | 0 |
| 1998 | 10 | 0 |
| 1999 | 4 | 0 |
| 2000 | 16 | 0 |
| 2001 | 9 | 1 |
| 2002 | 11 | 3 |
| 2003 | 3 | 3 |
| 2004 | 3 | 18 |
| 2005 | 4 | 19 |
| 2006 | 7 | 26 |
| 2007 | 11 | 17 |
| 2008 | 17 | 15 |
| 2009 | 8 | 12 |
| 2010 | 11 | 18 |
| 2011 | 12 | 17 |
| 2012 | 11 | 17 |
| 2013 | 15 | 29 |
| 2014 | 9 | 26 |
| 2015 | 20 | 35 |
| 2016 | 30 | 23 |
| 2017 | 28 | 26 |
| 2018 | 14 | 13 |
| 2019 | 20 | 15 |
| 2020 | 20 | 21 |
| 2021 | 16 | 12 |
| 2022 | 13 | 10 |
| 2023 | 11 | 8 |
| 2024 | 11 | 6 |
| 2025 | 7 | 7 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tangential internal combustion engine19 May 2026US 12,631,137 B2Fnf Innovation Sh.P.K.
- Organic rankine cycle decompression heat engine17 Feb 2026US 12,553,345 B2Heat Source Energy Corp.
- Bidirectional rotary hydraulic motor and pump13 Jan 2026US 12,523,153 B2
- Rotational engine with inner and outer rings7 Oct 2025US 12,435,632 B2Duplicent, LLC
- Three-cycle (stroke) rotary radial vane piston internal combustion engine23 Sep 2025US 12,421,852 B1
- Rotational Engine With Inner and Outer Rings17 Sep 2026US 2026/0275867 A1Duplicent, LLC
- Organic Rankine Cycle Decompression Heat Engine21 May 2026US 2026/0139592 A1Heat Source Energy Corp.
- Tangential internal combustion engine26 Feb 2026US 2026/0055723 A1Fnf Innovation Sh.P.K.
- Full-hybrid rotary motor with fuel thermo units and generator drive23 Oct 2025US 2025/0330063 A1
- Rotational engine18 Sep 2025US 2025/0290419 A1Duplicent, LLC
Most cited
By later US patents
- Scroll-type machine with axially compliant mounting226US 4,877,382 ACopeland Corporation · 1989
- Scroll-type machine with axially compliant mounting122US 4,767,293 ACopeland Corporation · 1988
- Non-orbiting scroll mounting arrangements for a scroll machine115US 5,102,316 ACopeland Corporation · 1992
- Scroll-type apparatus with hydrodynamic thrust bearing102US 4,065,279 AArthur D. Little, Inc. · 1977
- Scroll machine having liquid injection controlled by internal valve92US 5,640,854 ACopeland Corporation · 1997