F04C 2250/20
Geometry: of the rotor
Official title: of the rotor
F04C2250/20 (Geometry: of the rotor) appears on 197 US grants and 236 published applications in this corpus.
Search patents in F04C- Granted patents
- 197
- Published applications
- 236
- Assignees
- 128
- Inventors
- 437
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 1 | 1 |
| 2007 | 1 | 2 |
| 2008 | 1 | 1 |
| 2009 | 3 | 2 |
| 2010 | 1 | 4 |
| 2011 | 1 | 6 |
| 2012 | 3 | 5 |
| 2013 | 7 | 7 |
| 2014 | 7 | 11 |
| 2015 | 9 | 14 |
| 2016 | 3 | 9 |
| 2017 | 8 | 18 |
| 2018 | 13 | 20 |
| 2019 | 9 | 33 |
| 2020 | 15 | 19 |
| 2021 | 30 | 18 |
| 2022 | 18 | 17 |
| 2023 | 15 | 13 |
| 2024 | 24 | 15 |
| 2025 | 14 | 11 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Rotary pump with telescoping rotor sections that vary the flow rate18 Aug 2026US 12,710,040 B1Pratt & Whitney Canada Corp.
- Pump device, respiratory device and method for providing a respiratory gas24 Mar 2026US 12,582,793 B2Weinmann Emergency Medical Technology GmbH + Co. KG
- Devices for dispensing fluids24 Mar 2026US 12,583,003 B2PSG Germany GmbH
- Positive displacement rotary machine10 Feb 2026US 12,546,221 B2Tocircle Industries AS
- Volume expansion for cavitation reduction in a gear pump mesh2 Dec 2025US 12,486,843 B2Triumph Engine Control Systems, LLC
- Armahn Rotary Pump27 Aug 2026US 2026/0251143 A1
- Scroll compressor18 Jun 2026US 2026/0168493 A1Siam Compressor Industry Co., Ltd.
- Complex screw rotors28 May 2026US 2026/0146608 A1
- Enhanced bi-helical toothed wheel with variable helix angle and non-encapsulating tooth profile for hydraulic gear30 Apr 2026US 2026/0117767 A1Settima Meccanica S.r.l.
- Toothed wheel pump comprising multiple sets of internal-axle toothed wheels5 Feb 2026US 2026/0036124 A1Schwäbische Hüttenwerke Automotive GmbH
Most cited
By later US patents
- Self compensating adjustable fit progressing cavity pump for oil-well applications with varying temperatures32US 6,457,958 B1Weatherford/Lamb, Inc. · 2002
- Adjustable fit progressive cavity pump/motor apparatus and method31US 6,358,027 B1Weatherford/Lamb, Inc. · 2002
- Optimized helix angle rotors for Roots-style supercharger24US 7,488,164 B2Eaton Corporation · 2009
- Optimized helix angle rotors for Roots-style supercharger21US 7,866,966 B2Eaton Corporation · 2011
- Positive displacement rotary devices with uniquely configured voids20US 9,664,047 B2Mallen Research Limited Partnership · 2017