F04C 2/14
With toothed rotary pistons
Official title: with toothed rotary pistons
F04C2/14 (With toothed rotary pistons) appears on 806 US grants and 957 published applications in this corpus.
Search patents in F04C- Granted patents
- 806
- Published applications
- 957
- Assignees
- 469
- Inventors
- 1,578
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 7 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 6 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 13 | 0 |
| 2001 | 19 | 2 |
| 2002 | 10 | 14 |
| 2003 | 17 | 14 |
| 2004 | 15 | 25 |
| 2005 | 7 | 18 |
| 2006 | 16 | 15 |
| 2007 | 12 | 32 |
| 2008 | 6 | 23 |
| 2009 | 19 | 33 |
| 2010 | 13 | 48 |
| 2011 | 15 | 28 |
| 2012 | 27 | 46 |
| 2013 | 29 | 50 |
| 2014 | 31 | 52 |
| 2015 | 34 | 53 |
| 2016 | 34 | 51 |
| 2017 | 44 | 59 |
| 2018 | 50 | 68 |
| 2019 | 49 | 47 |
| 2020 | 46 | 50 |
| 2021 | 50 | 44 |
| 2022 | 42 | 41 |
| 2023 | 40 | 48 |
| 2024 | 47 | 41 |
| 2025 | 35 | 28 |
| 2026 | 17 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Diagnostic checks of a gear pump in a fluid system25 Aug 2026US 12,716,414 B2Project Phoenix, LLC
- In-situ serviceable gear pump11 Aug 2026US 12,704,125 B1Ace Machine Design Inc.
- Screw pump and its components4 Aug 2026US 12,698,769 B2Illinois Tool Works Inc.
- Screw pump and its components28 Jul 2026US 12,692,863 B2Illinois Tool Works Inc.
- Pump with pressure disc7 Jul 2026US 12,674,454 B2ITT Bornemann GmbH
- Rotary internal combustion engine with integrated pump8 Oct 2026US 2026/0309074 A1Pratt & Whitney Canada Corp.
- Screw spindle pump8 Oct 2026US 2026/0309150 A1Leistritz Pumpen GmbH
- Multiphase pump of the screw spindle pump type1 Oct 2026US 2026/0298229 A1Leistritz Pumpen GmbH
- Triple gear pump10 Sep 2026US 2026/0266286 A1IHI Corporation
- Eccentric Screw Pump Device, Pump System, Discharge System and Use13 Aug 2026US 2026/0235121 A1Putzmeister Engineering GmbH
Most cited
By later US patents
- Distributor apparatus with a pair of intermeshing screw rotors255US 9,938,972 B2Fish Engineering Limited · 2018
- System and method for driving a pump174US 8,801,394 B2Solar Turbines Incorporated · 2014
- Sealless multiphase screw-pump-and-motor package132US 6,457,950 B1Flowserve Management Company · 2002
- Fluid pump/generator with integrated motor and related stator and rotor and method of pumping fluid97US 7,021,905 B2Advanced Energy Conversion, LLC · 2006
- Oil pump pressure control device85US 8,038,416 B2Yamada Manufacturing Co., Ltd. · 2011