F04D 1/00
Radial-flow pumps
Official title: Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D7/00; priming or boosting F04D9/00)
F04D1/00 (Radial-flow pumps) appears on 1,358 US grants and 1,486 published applications in this corpus.
Search patents in F04D- Granted patents
- 1,358
- Published applications
- 1,486
- Assignees
- 689
- Inventors
- 2,751
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 10 | 0 |
| 1978 | 16 | 0 |
| 1979 | 7 | 0 |
| 1980 | 10 | 0 |
| 1981 | 19 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 12 | 0 |
| 1988 | 6 | 0 |
| 1989 | 10 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 9 | 0 |
| 1993 | 18 | 0 |
| 1994 | 11 | 0 |
| 1995 | 11 | 0 |
| 1996 | 13 | 0 |
| 1997 | 9 | 0 |
| 1998 | 13 | 0 |
| 1999 | 17 | 0 |
| 2000 | 5 | 0 |
| 2001 | 14 | 4 |
| 2002 | 14 | 4 |
| 2003 | 6 | 12 |
| 2004 | 10 | 11 |
| 2005 | 11 | 22 |
| 2006 | 5 | 16 |
| 2007 | 7 | 24 |
| 2008 | 11 | 19 |
| 2009 | 7 | 12 |
| 2010 | 16 | 25 |
| 2011 | 11 | 21 |
| 2012 | 16 | 19 |
| 2013 | 20 | 46 |
| 2014 | 21 | 46 |
| 2015 | 27 | 105 |
| 2016 | 32 | 112 |
| 2017 | 72 | 136 |
| 2018 | 82 | 87 |
| 2019 | 107 | 105 |
| 2020 | 100 | 105 |
| 2021 | 100 | 97 |
| 2022 | 78 | 88 |
| 2023 | 89 | 70 |
| 2024 | 104 | 114 |
| 2025 | 93 | 101 |
| 2026 | 65 | 85 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F04D 1/06Multi-stage pumps562
- F04D 1/04Helico-centrifugal pumps109
- F04D 1/12Pumps with scoops or like paring members protruding in the fluid circulating85
- F04D 1/006Double suction pumps81
- F04D 1/14Pumps raising fluids by centrifugal force within a conical rotary bowl with44
- F04D 1/02Radial-flow pumps: having non-centrifugal stages39
- F04D 1/003Radial-flow pumps: having contrarotating parts20
Recent patents
- Multistage disc pump for multiphase fluids6 Oct 2026US 12,753,771 B2
- Pump diffuser anti-rotation and alignment assembly6 Oct 2026US 12,753,774 B2Pentair Flow Technologies, LLC
- Multiple blade rows for impeller and diffuser stages15 Sep 2026US 12,736,061 B2
- Split thrust chamber for downhole pump25 Aug 2026US 12,716,417 B2Halliburton Energy Services.Inc.
- Pump unit for a centrifugal pump and centrifugal pump25 Aug 2026US 12,716,422 B2Levitronix LLC
- Gas separator for electrical submersible pump8 Oct 2026US 2026/0309018 A1Halliburton Energy Services.Inc.
- Systems and methods of prediction and management of scaling on components8 Oct 2026US 2026/0309156 A1Schlumberger Technology Corporation
- Melamine process with urea melt-based washing of melamine offgas1 Oct 2026US 2026/0297039 A1Casale SA
- Vertical turbine pump with roller bearing support1 Oct 2026US 2026/0298243 A1Unted Flo, LLC
- Modularized lease automated custody transfer assembly incorporated into a shipping container styled skid1 Oct 2026US 2026/0298244 A1Cape Construction, LLC
Most cited
By later US patents
- Single-stage axial flow blood pump493US 4,846,152 ANimbus Medical, Inc. · 1989
- Percutaneous bloom pump with mixed-flow output417US 4,817,586 ANimbus Medical, Inc. · 1989
- Blood pump using cross-flow principles295US 6,217,541 B1Kriton Medical, Inc. · 2001
- Magnetically suspended and rotated impellor pump apparatus and method291US 4,688,998 A1987
- Sealless rotodynamic pump with fluid bearing280US 5,370,509 AThe Cleveland Clinic Foundation · 1994