F04C 18/10
Of internal-axis type with the outer member having more teeth or tooth
Official title: of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member
F04C18/10 (Of internal-axis type with the outer member having more teeth or tooth) appears on 146 US grants and 107 published applications in this corpus.
Search patents in F04C- Granted patents
- 146
- Published applications
- 107
- Assignees
- 82
- Inventors
- 230
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 7 | 0 |
| 1992 | 8 | 0 |
| 1993 | 5 | 0 |
| 1994 | 8 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 1 |
| 2002 | 4 | 3 |
| 2003 | 3 | 4 |
| 2004 | 1 | 4 |
| 2005 | 2 | 1 |
| 2006 | 3 | 3 |
| 2007 | 2 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 2 | 4 |
| 2011 | 3 | 1 |
| 2012 | 2 | 1 |
| 2013 | 1 | 3 |
| 2014 | 1 | 5 |
| 2015 | 5 | 16 |
| 2016 | 6 | 12 |
| 2017 | 9 | 12 |
| 2018 | 13 | 3 |
| 2019 | 9 | 5 |
| 2020 | 2 | 1 |
| 2021 | 5 | 4 |
| 2022 | 1 | 4 |
| 2023 | 4 | 6 |
| 2024 | 7 | 5 |
| 2025 | 6 | 2 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Screw pump and its components4 Aug 2026US 12,698,769 B2Illinois Tool Works Inc.
- Pump control system for a refuse vehicle27 Jan 2026US 12,534,294 B2Oshkosh Corporation
- Secondary airflow paths for air compressors9 Sep 2025US 12,410,799 B2Doosan Bobcat North America, Inc.
- Electric motor and vacuum pump24 Jun 2025US 12,338,823 B2Vacuubrand GmbH + Co KG
- Cooling pump assembly20 May 2025US 12,305,644 B1
- Vacuum pump24 Sep 2026US 2026/0286961 A1Edwards Limited
- Internal gear pump25 Jun 2026US 2026/0177055 A1Sumitomo Electric Sintered Alloy, Ltd.
- Pump control system for a refuse vehicle14 May 2026US 2026/0131970 A1Oshkosh Corporation
- Screw pump and its components9 Oct 2025US 2025/0314248 A1Illinois Tool Works Inc.
- Oil-Free Air Compressor27 Mar 2025US 2025/0101984 A1Hitachi Industrial Equipment Systems Co., Ltd.
Most cited
By later US patents
- Quasi-isothermal brayton cycle engine55US 6,886,326 B2The Texas A&M University System · 2005
- Quasi-isothermal Brayton Cycle engine41US 6,530,211 B22003
- Convertible engine-air compressor apparatus for driving a vehicle34US 3,963,379 A1976
- Axial flow fluid compresser32US 4,871,304 AKabushiki Kaisha Toshiba · 1989
- Quasi-isothermal Brayton cycle engine30US 6,336,317 B12002