F01C 1/10
Of internal-axis type with the outer member having more teeth or tooth-equivalents
Official title: of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
F01C1/10 (Of internal-axis type with the outer member having more teeth or tooth-equivalents) appears on 253 US grants and 210 published applications in this corpus.
Search patents in F01C- Granted patents
- 253
- Published applications
- 210
- Assignees
- 109
- Inventors
- 400
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 6 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 5 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 3 |
| 2003 | 1 | 9 |
| 2004 | 6 | 9 |
| 2005 | 1 | 6 |
| 2006 | 7 | 9 |
| 2007 | 4 | 9 |
| 2008 | 1 | 7 |
| 2009 | 6 | 10 |
| 2010 | 6 | 12 |
| 2011 | 5 | 7 |
| 2012 | 5 | 4 |
| 2013 | 5 | 10 |
| 2014 | 11 | 22 |
| 2015 | 10 | 13 |
| 2016 | 15 | 12 |
| 2017 | 16 | 15 |
| 2018 | 12 | 8 |
| 2019 | 17 | 8 |
| 2020 | 7 | 9 |
| 2021 | 7 | 6 |
| 2022 | 10 | 3 |
| 2023 | 5 | 6 |
| 2024 | 5 | 5 |
| 2025 | 5 | 4 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01C 1/104One member having simultaneously a rotational movement about its own axis and84
- F01C 1/103The two members rotating simultaneously around their respective axes68
- F01C 1/107With helical teeth40
- F01C 1/101Moineau-type38
- F01C 1/102With a crescent shaped filler element located between the intermeshing elements20
- F01C 1/113The inner member carrying rollers intermeshing with the outer member4
Recent patents
- Downhole fluid motor and associated methods11 Aug 2026US 12,704,022 B2Thru Tubing Solutions, Inc.
- Rotary piston machine3 Feb 2026US 12,540,572 B2
- Rotor tilt compensation in PDM stators2 Dec 2025US 12,486,771 B2Abaco Drilling Technologies LLC
- Pumps, compressors, and expanders with a teardrop-shaped rotor8 Jul 2025US 12,352,268 B2Rotoliptic Technologies Incorporated
- Particle adjusting drilling assembly and method20 May 2025US 12,305,640 B2Workover Solutions, Inc.
- Hydraulic Motor with an Enhanced Multi-Purpose Passage9 Jul 2026US 2026/0194037 A1Parker-Hannifin Corporation
- Two-Stroke Rotary Engine with Improved Inlet and Outlet Ports19 Mar 2026US 2026/0078674 A1LiquidPiston, Inc.
- Compensation for rotor tilt in hybrid pdm stators12 Mar 2026US 2026/0071545 A1Abaco Drilling Technologies LLC
- Downhole fluid motor and associated methods5 Mar 2026US 2026/0062999 A1Thru Tubing Solutions, Inc.
- Rotary Machines With Teardrop-Shaped Rotors2 Oct 2025US 2025/0305496 A1Rotoliptic Technologies Incorporated
Most cited
By later US patents
- Composite stator construction for downhole drilling motors85US 5,171,138 ADrilex Systems, Inc. · 1992
- Progressive cavity drive train59US 4,080,115 AA-Z International Tool Company · 1978
- Quasi-isothermal brayton cycle engine55US 6,886,326 B2The Texas A&M University System · 2005
- Quasi-isothermal Brayton Cycle engine41US 6,530,211 B22003
- Integrated energy generating damper39US 8,841,786 B2Levant Power Corporation · 2014