F04D 29/428
Discharge tongues
Official title: {Discharge tongues (F04D17/04 takes precedence)}
F04D29/428 (Discharge tongues) appears on 74 US grants and 54 published applications in this corpus.
Search patents in F04D- Granted patents
- 74
- Published applications
- 54
- Assignees
- 56
- Inventors
- 147
- Latest grant
- 26 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 2 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 3 |
| 2012 | 0 | 1 |
| 2013 | 1 | 4 |
| 2014 | 2 | 7 |
| 2015 | 5 | 5 |
| 2016 | 2 | 4 |
| 2017 | 6 | 2 |
| 2018 | 2 | 6 |
| 2019 | 1 | 1 |
| 2020 | 5 | 2 |
| 2021 | 2 | 1 |
| 2022 | 2 | 2 |
| 2023 | 5 | 3 |
| 2024 | 5 | 4 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pump with precast concrete dual volute26 Aug 2025US 12,398,730 B1Flowserve Pte. Ltd.
- Volute design for lower manufacturing cost and radial load reduction27 May 2025US 12,313,082 B2Fluid Handling LLC
- Parallel flow pump12 Nov 2024US 12,140,156 B2Electrolux Professional S.p.A.
- Centrifugal pumps, casings and vehicles using the same15 Oct 2024US 12,117,017 B2W. S. Darley & Co.
- Pump and hydraulic unit of a pump17 Sep 2024US 12,092,129 B2Xylem Europe GmbH
- Slurry pump28 May 2026US 2026/0146627 A1
- Parallel flow pump24 Apr 2025US 2025/0129793 A1Electrolux Professional S.p.A.
- Centrifugal pump for conveying a fluid19 Dec 2024US 2024/0418183 A1Sulzer Management AG
- Pump and hydraulic unit of a pump15 Aug 2024US 2024/0271635 A1Xylem Europe GmbH
- Slurry pump9 May 2024US 2024/0151241 A1Metso Outotec Sweden AB
Most cited
By later US patents
- Impeller position compensation using field oriented control75US 9,371,826 B2Thoratec Corporation · 2016
- Centrifugal pump with offset volute41US 8,517,699 B2The Cleveland Clinic Foundation · 2013
- 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
- Method of reducing hydraulic instability28US 5,286,162 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1994
- Junction for shears sensitive biological fluid paths28US 6,293,752 B12001