F04D 17/164
Multi-stage fans
Official title: {Multi-stage fans, e.g. for vacuum cleaners}
F04D17/164 (Multi-stage fans) appears on 100 US grants and 102 published applications in this corpus.
Search patents in F04D- Granted patents
- 100
- Published applications
- 102
- Assignees
- 64
- Inventors
- 198
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 4 |
| 2004 | 0 | 1 |
| 2005 | 2 | 2 |
| 2006 | 1 | 1 |
| 2007 | 0 | 5 |
| 2008 | 0 | 0 |
| 2009 | 2 | 3 |
| 2010 | 2 | 3 |
| 2011 | 1 | 4 |
| 2012 | 6 | 5 |
| 2013 | 3 | 2 |
| 2014 | 6 | 5 |
| 2015 | 3 | 4 |
| 2016 | 3 | 3 |
| 2017 | 3 | 7 |
| 2018 | 3 | 2 |
| 2019 | 7 | 7 |
| 2020 | 5 | 6 |
| 2021 | 5 | 4 |
| 2022 | 4 | 6 |
| 2023 | 5 | 8 |
| 2024 | 8 | 13 |
| 2025 | 8 | 2 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Bearing sleeve for blower17 Mar 2026US 12,576,229 B2ResMed Motor Technologies Inc.
- Fan assembly and vacuum cleaner having same27 Jan 2026US 12,532,995 B2Jiangsu Midea Cleaning Appliances Co., Ltd.
- Respiratory apparatus13 Jan 2026US 12,521,503 B2ResMed Pty Ltd
- Compact low noise efficient blower for CPAP devices25 Nov 2025US 12,480,504 B2ResMed Motor Technologies Inc.
- Respiratory pressure therapy system14 Oct 2025US 12,440,632 B2ResMed Pty Ltd
- Blower with a gas pressurization system30 Jul 2026US 2026/0218713 A1Wallenberg Union LLC
- Fan motor23 Jul 2026US 2026/0210365 A1LG Electronics Inc.
- Bearing sleeve for blower25 Jun 2026US 2026/0174983 A1ResMed Motor Technologies Inc.
- Respiratory pressure therapy system8 Jan 2026US 2026/0007843 A1ResMed Pty Ltd
- Respiratory pressure therapy system2 Oct 2025US 2025/0303096 A1ResMed Pty Ltd
Most cited
By later US patents
- Compact low noise efficient blower for CPAP devices351US 7,866,944 B2ResMed Motor Technologies Inc. · 2011
- Medical ventilator268US 6,543,449 B1Respironics, Inc. · 2003
- Air guide assembly for an electric motor and methods of making147US 5,296,769 AAB Electrolux · 1994
- Double-ended blower and volutes therefor139US 6,910,483 B2ResMed Limited · 2005
- Electric air pump having multiple impellers and method50US 6,296,459 B1Intex Recreation Corp. · 2001