F03B 3/125
Rotors for radial flow at high-pressure side and axial flow at low-pressure
Official title: {Rotors for radial flow at high-pressure side and axial flow at low-pressure side, e.g. for Francis-type turbines}
F03B3/125 (Rotors for radial flow at high-pressure side and axial flow at low-pressure) appears on 65 US grants and 63 published applications in this corpus.
Search patents in F03B- Granted patents
- 65
- Published applications
- 63
- Assignees
- 33
- Inventors
- 135
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 6 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 1 | 6 |
| 2006 | 2 | 3 |
| 2007 | 4 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 2 |
| 2010 | 2 | 3 |
| 2011 | 0 | 6 |
| 2012 | 0 | 1 |
| 2013 | 5 | 2 |
| 2014 | 3 | 6 |
| 2015 | 1 | 3 |
| 2016 | 3 | 3 |
| 2017 | 2 | 2 |
| 2018 | 3 | 4 |
| 2019 | 3 | 1 |
| 2020 | 1 | 4 |
| 2021 | 4 | 4 |
| 2022 | 2 | 2 |
| 2023 | 3 | 3 |
| 2024 | 2 | 2 |
| 2025 | 3 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulic turbine29 Sep 2026US 12,747,716 B2Natel Energy Holdings, Inc.
- Energy-recovery turbine with pressure-release valve18 Nov 2025US 12,473,883 B2Corporation Bearstream Inc.
- Hydraulic machine5 Aug 2025US 12,378,939 B2Yumes Frontier Inc.
- Hydraulic turbine3 Jun 2025US 12,320,325 B2Natel Energy Holdings, Inc.
- Francis-type hydraulic machine16 Jul 2024US 12,037,975 B2Voith Patent GmbH
- Hydraulic turbine30 Oct 2025US 2025/0334094 A1Natel Energy Holdings, Inc.
- Hydraulic turbine27 Feb 2025US 2025/0067239 A1Natel Energy Holdings, Inc.
- Hydraulic machine25 Jul 2024US 2024/0247633 A1Yumes Frontier Inc.
- Energy-recovery turbine with pressure-release valve30 May 2024US 2024/0175419 A1Corporation Bearstream Inc.
- Francis-type hydraulic machine9 Nov 2023US 2023/0358201 A1Voith Patent GmbH
Most cited
By later US patents
- Hydraulic turbine28US 5,997,242 AAlden Research Laboratory, Inc. · 1999
- Water-turbine runner and process for manufacturing the same24US 5,035,579 AHitachi, Ltd. · 1991
- Runner for Francis-type hydraulic turbine22US 6,135,716 AGE Energy (Norway) AS · 2000
- Hollow blade for hydraulic turbine or pump21US 6,155,783 AVoith Siemens Hydro Power Generation, Inc. · 2000
- Blade configurations for Francis-type turbine runners20US 4,479,757 ADominion Engineering Works Limited · 1984