F04D 29/2211
More than one set of flow passages
Official title: {More than one set of flow passages}
F04D29/2211 (More than one set of flow passages) appears on 33 US grants and 17 published applications in this corpus.
Search patents in F04D- Granted patents
- 33
- Published applications
- 17
- Assignees
- 23
- Inventors
- 68
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 4 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 3 |
| 2025 | 2 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fluid pump including an impeller26 May 2026US 12,638,020 B1ITT Manufacturing Enterprises, Inc.
- Water pump with one inlet and two outlets31 Mar 2026US 12,590,587 B2Shenzhen Megmeet Electrical Co., Ltd.
- Impeller and pump for combination washer and dryer laundry appliance1 Jul 2025US 12,344,986 B2Haier US Appliance Solutions, Inc.
- High volume axial flow electric submersible pump (ESP) pump stage20 May 2025US 12,305,494 B2Halliburton Energy Services.Inc.
- Open impeller for submergible pump configured for pumping liquid comprising abrasive matter9 Jul 2024US 12,031,554 B2Xylem Europe GmbH
- Fluid pump including an impeller28 May 2026US 2026/0146622 A1ITT Manufacturing Enterprises, Inc.
- Water pump with one inlet and two outlets8 May 2025US 2025/0146504 A1Shenzhen Megmeet Electrical Co., Ltd.
- Impeller and pump for combination washer and dryer laundry appliance11 Jul 2024US 2024/0229336 A1Haier US Appliance Solutions, Inc.
- High volume axial flow electric submersible pump (esp) pump stage30 May 2024US 2024/0175339 A1Halliburton Energy Services.Inc.
- End-suction pump with dual inlet impeller4 Apr 2024US 2024/0110578 A1ITT Manufacturing Enterprises, Inc.
Most cited
By later US patents
- Blood pump having rotor with internal bore for fluid flow121US 5,938,412 AAdvanced Bionics AG · 1999
- Blood pump having radial vanes with enclosed magnetic drive components117US 5,924,848 AAdvanced Bionics AG · 1999
- High efficiency pump impeller85US 6,210,116 B12001
- Magnetically driven rotor for blood pump61US 6,206,659 B1Advanced Bionics AG · 2001
- Bearing and seal-free blood pump48US 5,685,700 AAdvanced Bionics AG · 1997