F04D 29/225
Channel wheels
Official title: {Channel wheels, e.g. one blade or one flow channel}
F04D29/225 (Channel wheels) appears on 50 US grants and 41 published applications in this corpus.
Search patents in F04D- Granted patents
- 50
- Published applications
- 41
- Assignees
- 34
- Inventors
- 114
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 4 |
| 2011 | 2 | 3 |
| 2012 | 2 | 3 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 4 |
| 2017 | 0 | 2 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 3 | 3 |
| 2021 | 1 | 3 |
| 2022 | 2 | 2 |
| 2023 | 3 | 0 |
| 2024 | 2 | 3 |
| 2025 | 3 | 2 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of designing single-channel pump and single-channel pump25 Aug 2026US 12,716,425 B2Korea Institute of Industrial Technology
- Impeller pump and method26 May 2026US 12,638,021 B2Pentair Flow Technologies, LLC
- Centrifugal pump system14 Oct 2025US 12,439,899 B2
- Pump for conveying wastewater and impeller for such a pump3 Jun 2025US 12,320,364 B2Sulzer Management AG
- Pump comprising an impeller body provided as an oblique cone18 Feb 2025US 12,228,138 B2Pentair Flow Technologies, LLC
- Pump9 Jul 2026US 2026/0194065 A1Ebara Corporation
- Centrifugal pump impeller with inverted expulsion chambers9 Apr 2026US 2026/0098543 A1Crane Pumps & Systems PFT Corp.
- Centrifugal Pump System15 Jan 2026US 2026/0013486 A1
- Method of designing single-channel pump and single-channel pump21 Aug 2025US 2025/0264115 A1Korea Institute of Industrial Technology
- Impeller pump and method12 Jun 2025US 2025/0188945 A1Pentair Flow Technologies, LLC
Most cited
By later US patents
- Multi-functional rotary hydraulic machine systems38US 5,017,087 A1991
- Apparatus and method for transporting and metering particulate materials into fluid pressure33US 5,402,876 AStamet, Inc. · 1995
- Open-type centrifugal pump with single-blade impeller30US 4,540,334 A1985
- Grooved disk drive apparatus and method for transporting and metering particulate material30US 5,355,993 A1994
- Apparatus and method with improved drive force capability for transporting and metering particulate material29US 5,381,886 A1995