F04D 29/448
Bladed diffusers
Official title: {bladed diffusers}
F04D29/448 (Bladed diffusers) appears on 202 US grants and 165 published applications in this corpus.
Search patents in F04D- Granted patents
- 202
- Published applications
- 165
- Assignees
- 119
- Inventors
- 420
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 2 | 0 |
| 1994 | 10 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 2 |
| 2002 | 3 | 1 |
| 2003 | 3 | 3 |
| 2004 | 4 | 3 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 4 |
| 2008 | 0 | 3 |
| 2009 | 3 | 5 |
| 2010 | 4 | 5 |
| 2011 | 2 | 6 |
| 2012 | 2 | 7 |
| 2013 | 4 | 5 |
| 2014 | 6 | 7 |
| 2015 | 6 | 9 |
| 2016 | 5 | 7 |
| 2017 | 11 | 15 |
| 2018 | 5 | 7 |
| 2019 | 10 | 9 |
| 2020 | 7 | 5 |
| 2021 | 5 | 10 |
| 2022 | 12 | 6 |
| 2023 | 10 | 8 |
| 2024 | 14 | 19 |
| 2025 | 8 | 9 |
| 2026 | 10 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pump diffuser anti-rotation and alignment assembly6 Oct 2026US 12,753,774 B2Pentair Flow Technologies, LLC
- Water flow system for washer, and washer1 Sep 2026US 12,721,496 B2Ningbo Fotile Kitchen Ware Co., Ltd.
- Composite cross-over diffuser for a centrifugal pump, centrifugal pump comprising the same and corresponding manufacturing process9 Jun 2026US 12,650,131 B2Waterax Inc.
- Submersible pump with external slicer19 May 2026US 12,631,185 B1
- Heat collecting pump and washing appliance having the same7 Apr 2026US 12,595,809 B2Foshan Shunde Midea Washing Appliances Manufacturing Co., Ltd.
- Pump and domestic appliance having such a pump17 Sep 2026US 2026/0276002 A1E. G. O. Elektro-Geratebau GmbH
- Flow Reversing Pump Apparatus23 Jul 2026US 2026/0210323 A1
- Anti-swirl ribs for erosion resistance of electric submersible pumps16 Jul 2026US 2026/0201902 A1Schlumberger Technology Corporation
- Flow guiding element, heat collecting pump, and dishwasher2 Jul 2026US 2026/0185537 A1Foshan Shunde Midea Washing Appliances Manufacturing Co., Ltd.
- Pump and domestic appliance having such a pump11 Jun 2026US 2026/0160265 A1E. G. O. Elektro-Geratebau GmbH
Most cited
By later US patents
- Mixed flow pump183US 6,692,318 B2The Penn State Research Foundation · 2004
- Dishwasher having a wash liquid recirculation system77US 5,924,432 AWhirlpool Corporation · 1999
- Hydraulic energy recovery device51US 6,345,961 B1Fluid Equipment Development Company, LLC · 2002
- Method and apparatus for reducing axial thrust in centrifugal pumps43US 5,320,482 AThe United States of America as represented by the Secretary of the Navy · 1994
- Centrifugal pump having a housing and a volute casing wherein the volute casing has a tear-drop shaped inner wall defined by a circular body region and a converging apex with the inner wall comprising a blocker below at least one perimeter end of one diffuser blade34US 11,193,504 B1Aquastar Pool Products, Inc. · 2021