F04D 1/04
Helico-centrifugal pumps
F04D1/04 (Helico-centrifugal pumps) appears on 109 US grants and 116 published applications in this corpus.
Search patents in F04D- Granted patents
- 109
- Published applications
- 116
- Assignees
- 87
- Inventors
- 244
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 2 | 2 |
| 2004 | 2 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 2 |
| 2012 | 0 | 1 |
| 2013 | 2 | 7 |
| 2014 | 2 | 8 |
| 2015 | 4 | 18 |
| 2016 | 5 | 2 |
| 2017 | 13 | 4 |
| 2018 | 4 | 1 |
| 2019 | 10 | 14 |
| 2020 | 4 | 10 |
| 2021 | 8 | 3 |
| 2022 | 4 | 4 |
| 2023 | 2 | 4 |
| 2024 | 7 | 9 |
| 2025 | 12 | 9 |
| 2026 | 2 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pump unit, pump system, and pump system operation method30 Jun 2026US 12,669,128 B2Nikkiso Co., Ltd.
- Automatic exhaust mechanism17 Feb 2026US 12,553,442 B2Belgravia Wood Limited
- Electrical submersible pump with single direction lubricant flow25 Nov 2025US 12,480,498 B2Baker Hughes Oilfield Operations LLC
- Automatic exhaust mechanism25 Nov 2025US 12,480,499 B2Belgravia Wood Limited
- Automatic exhaust mechanism25 Nov 2025US 12,480,500 B2Belgravia Wood Limited
- Liquid-flow cooling device3 Sep 2026US 2026/0262193 A1Cooler Master Co., Ltd.
- Axial gap-type electric motor including integrated stator core, and water pump using same6 Aug 2026US 2026/0226900 A1Amotech Co., Ltd.
- Axial gap-type electric motor equipped with coreless stator, and water pump using same6 Aug 2026US 2026/0226901 A1Amotech Co., Ltd.
- Flow Reversing Pump Apparatus23 Jul 2026US 2026/0210323 A1
- System and method for handling thrust loads in axial flow pump23 Jul 2026US 2026/0210372 A1Schlumberger Technology Corporation
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
- Sealless rotodynamic pump with fluid bearing280US 5,370,509 AThe Cleveland Clinic Foundation · 1994
- Sealless heart pump248US 5,049,134 AThe Cleveland Clinic Foundation · 1991
- Sealless rotodynamic pump with radially offset rotor122US 5,324,177 AThe Cleveland Clinic Foundation · 1994