F03B 3/186
Spiral or volute casings
Official title: {Spiral or volute casings}
F03B3/186 (Spiral or volute casings) appears on 25 US grants and 31 published applications in this corpus.
Search patents in F03B- Granted patents
- 25
- Published applications
- 31
- Assignees
- 21
- Inventors
- 52
- Latest grant
- 5 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 2 | 2 |
| 2009 | 0 | 1 |
| 2010 | 3 | 3 |
| 2011 | 1 | 2 |
| 2012 | 0 | 1 |
| 2013 | 1 | 4 |
| 2014 | 1 | 3 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 1 | 3 |
| 2018 | 0 | 2 |
| 2019 | 5 | 0 |
| 2020 | 1 | 2 |
| 2021 | 3 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Hydraulic machine5 Aug 2025US 12,378,939 B2Yumes Frontier Inc.
- Vortex generator20 Jul 2021US 11,067,054 B2National University of Ireland, Galway
- Gravitational vortex water turbine assembly8 Jun 2021US 11,028,816 B2Turbulent Bvba
- Double-flow type volute casing having structure for changing direction of flow in turbine inlet19 Jan 2021US 10,895,165 B2Dong Hse Engineering Co., Ltd.
- Guide vane of hydraulic machinery and hydraulic machine17 Mar 2020US 10,590,904 B2Kabushiki Kaisha Toshiba
- Hydraulic machine25 Jul 2024US 2024/0247633 A1Yumes Frontier Inc.
- The impeller assembly for hydroelectric power generation device5 May 2022US 2022/0136479 A1
- Vortex generator23 Apr 2020US 2020/0124019 A1National University of Ireland, Galway
- Double-flow type volute casing having structure for changing direction of flow in turbine inlet6 Feb 2020US 2020/0040758 A1Dong Hae Engineering Co., Ltd.
- A gravitational vortex water turbine assembly27 Dec 2018US 2018/0372059 A1Turbulent Bvba
Most cited
By later US patents
- Fluid pump apparatus81US 6,547,530 B2Ntn Corporation · 2003
- Method for utilizing angular momentum in energy conversion devices and an apparatus therefore72US 5,167,483 A1992
- Miniature hydro-power generation system22US 7,956,481 B2Access Business Group International LLC · 2011
- Miniature hydro-power generation system15US 7,768,147 B2Access Business Group International LLC · 2010
- Miniature hydro-power generation system14US 7,675,188 B2Access Business Group International LLC · 2010