F01C 1/14
With toothed rotary pistons
Official title: with toothed rotary pistons
F01C1/14 (With toothed rotary pistons) appears on 236 US grants and 215 published applications in this corpus.
Search patents in F01C- Granted patents
- 236
- Published applications
- 215
- Assignees
- 118
- Inventors
- 379
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 6 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 1 |
| 2002 | 5 | 3 |
| 2003 | 6 | 15 |
| 2004 | 7 | 7 |
| 2005 | 4 | 7 |
| 2006 | 7 | 7 |
| 2007 | 3 | 9 |
| 2008 | 0 | 3 |
| 2009 | 5 | 7 |
| 2010 | 3 | 14 |
| 2011 | 3 | 2 |
| 2012 | 6 | 11 |
| 2013 | 2 | 10 |
| 2014 | 8 | 11 |
| 2015 | 8 | 17 |
| 2016 | 6 | 8 |
| 2017 | 12 | 20 |
| 2018 | 13 | 16 |
| 2019 | 12 | 6 |
| 2020 | 7 | 8 |
| 2021 | 10 | 11 |
| 2022 | 7 | 5 |
| 2023 | 5 | 6 |
| 2024 | 8 | 2 |
| 2025 | 4 | 6 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- Piston compressor and method in which such a piston compressor is used30 Sep 2025US 12,429,039 B2Atlas Copco Airpower, Naamloze Vennootschap
- Rotor pair for a compression block of a screw machine8 Jul 2025US 12,352,266 B2Kaeser Kompressoren SE
- System and method of hydrogen fuel injection14 Jan 2025US 12,196,162 B1Astron Aerospace LLC
- Additively manufactured rotors for superchargers and expanders10 Dec 2024US 12,163,460 B2Eaton Intelligent Power Limited
- Planetary rotor machine with double sheer synchronizing mechanism18 Jun 2026US 2026/0168381 A1Radius 1, LLC
- Complex screw rotors28 May 2026US 2026/0146608 A1
- EPIC Cycles for the EPIC Cycle Engine30 Apr 2026US 2026/0117695 A1The United States of America as represented by the Secretary of the Navy
- Screw pump and its components9 Oct 2025US 2025/0314248 A1Illinois Tool Works Inc.
- Machine for expanding or compressing compressible media2 Oct 2025US 2025/0305497 A1BITZER Kuehlmaschinenbau GmbH
Most cited
By later US patents
- Rotary prime mover and compressor and methods of operation thereof31US 4,086,880 A1978
- Microfabricated microengine with constant rotation rate23US 5,955,801 ASandia Corporation · 1999
- Rotary engine23US 6,129,067 A2000
- Rotary machine with motor embedded in the rotor22US 4,758,132 AInstitut Cerac S. A. · 1988
- Isochoric heat addition engines and methods22US 8,863,724 B2LiquidPiston, Inc. · 2014