F04D 13/0646
The hollow pump or motor shaft being the conduit for the working
Official title: {the hollow pump or motor shaft being the conduit for the working fluid}
F04D13/0646 (The hollow pump or motor shaft being the conduit for the working) appears on 193 US grants and 182 published applications in this corpus.
Search patents in F04D- Granted patents
- 193
- Published applications
- 182
- Assignees
- 125
- Inventors
- 456
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 6 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 6 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 7 | 0 |
| 2000 | 9 | 0 |
| 2001 | 16 | 2 |
| 2002 | 10 | 2 |
| 2003 | 3 | 4 |
| 2004 | 4 | 4 |
| 2005 | 0 | 2 |
| 2006 | 3 | 4 |
| 2007 | 3 | 3 |
| 2008 | 1 | 4 |
| 2009 | 1 | 2 |
| 2010 | 0 | 1 |
| 2011 | 1 | 4 |
| 2012 | 1 | 1 |
| 2013 | 2 | 5 |
| 2014 | 0 | 5 |
| 2015 | 3 | 10 |
| 2016 | 1 | 7 |
| 2017 | 4 | 11 |
| 2018 | 3 | 7 |
| 2019 | 5 | 19 |
| 2020 | 12 | 11 |
| 2021 | 10 | 10 |
| 2022 | 10 | 12 |
| 2023 | 10 | 16 |
| 2024 | 15 | 8 |
| 2025 | 9 | 11 |
| 2026 | 9 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Thermistor flow path8 Sep 2026US 12,729,681 B2GHSP, Inc.
- Alternating pump gaps4 Aug 2026US 12,698,776 B2Tc1 LLC
- Magnetic drive, seal-less pump28 Jul 2026US 12,692,872 B2
- Automotive electric oil pump21 Jul 2026US 12,687,166 B2Pierburg Pump Technology GmbH
- Fluid pump including an impeller26 May 2026US 12,638,020 B1ITT Manufacturing Enterprises, Inc.
- Magnetic levitation-based hybrid propulsion system10 Sep 2026US 2026/0266195 A1MagLev Aero Inc.
- Thermistor flow path10 Sep 2026US 2026/0266285 A1GHSP, Inc.
- Thermistor flow path13 Aug 2026US 2026/0235120 A1GHSP, Inc.
- Stator assembly for micro-axial pump6 Aug 2026US 2026/0231360 A1Hewlett Packard Enterprise Development LP
- Micro-axial pump having asymmetrical stator teeth30 Jul 2026US 2026/0223323 A1Hewlett Packard Enterprise Development LP
Most cited
By later US patents
- Axial flow blood pump with hydrodynamically suspended rotor386US 5,211,546 ANu-Tech Industries, Inc. · 1993
- Implantable electric axial-flow blood pump344US 5,588,812 ANimbus, Inc. · 1996
- Magnetically driven axial-flow pump258US 6,527,521 B2Nipro Corporation · 2003
- Continuous flow rotary pump251US 6,247,892 B1IMPSA International Inc. · 2001
- Blood pump having a magnetically suspended rotor250US 6,447,266 B2The United States of America as represented by the United States National Aeronautics and Space Administration · 2002