F01C 1/084
Toothed wheels
Official title: {Toothed wheels}
F01C1/084 (Toothed wheels) appears on 131 US grants and 103 published applications in this corpus.
Search patents in F01C- Granted patents
- 131
- Published applications
- 103
- Assignees
- 83
- Inventors
- 219
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 0 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 1 |
| 2002 | 2 | 2 |
| 2003 | 2 | 7 |
| 2004 | 3 | 2 |
| 2005 | 2 | 6 |
| 2006 | 4 | 4 |
| 2007 | 3 | 5 |
| 2008 | 1 | 5 |
| 2009 | 4 | 3 |
| 2010 | 4 | 8 |
| 2011 | 4 | 0 |
| 2012 | 1 | 3 |
| 2013 | 2 | 6 |
| 2014 | 3 | 6 |
| 2015 | 2 | 4 |
| 2016 | 6 | 2 |
| 2017 | 4 | 6 |
| 2018 | 3 | 4 |
| 2019 | 5 | 4 |
| 2020 | 3 | 5 |
| 2021 | 5 | 5 |
| 2022 | 3 | 4 |
| 2023 | 4 | 3 |
| 2024 | 8 | 3 |
| 2025 | 2 | 4 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Logarithmic hollow shaft speed reducer14 Apr 2026US 12,601,391 B2
- Complex screw rotors with a central circular cross section connecting right-hand and left-hand sections of the rotors4 Nov 2025US 12,460,640 B2Industrial Technologies and Services, LLC
- Rotor pair for a compression block of a screw machine8 Jul 2025US 12,352,266 B2Kaeser Kompressoren SE
- Complex screw rotors having multiple helical profiles joined by a centeral portion with a pocket8 Oct 2024US 12,110,888 B2Industrial Technologies and Services, LLC
- Rotary airlock combustion engine3 Sep 2024US 12,078,098 B2
- Complex screw rotors28 May 2026US 2026/0146608 A1
- Logarithmic hollow shaft speed reducer9 Oct 2025US 2025/0314289 A1
- Internal combustion engine21 Aug 2025US 2025/0264023 A1
- Rotary airlock combustion engine22 May 2025US 2025/0163845 A1
- Rotary positive displacement device24 Apr 2025US 2025/0129778 A1Spherical Rotors Inc.
Most cited
By later US patents
- Rotary engine and method of operation36US 5,720,251 A1998
- Screw rotor machine and rotor profile therefor22US 4,435,139 ASvenska Rotor Maskiner Aktiebolag · 1984
- Helical screw rotor profiles21US 4,412,796 AIngersoll-Rand Company · 1983
- Axial flow positive displacement worm compressor16US 7,726,115 B2General Electric Company · 2010
- Screw-rotor machine with straight flank sections15US 4,140,445 ASvenka Rotor Haskiner Aktiebolag · 1979