F04D 29/283
Rotors of the squirrel-cage type
Official title: {rotors of the squirrel-cage type}
F04D29/283 (Rotors of the squirrel-cage type) appears on 165 US grants and 174 published applications in this corpus.
Search patents in F04D- Granted patents
- 165
- Published applications
- 174
- Assignees
- 110
- Inventors
- 415
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 1 |
| 2002 | 4 | 2 |
| 2003 | 2 | 7 |
| 2004 | 2 | 1 |
| 2005 | 4 | 7 |
| 2006 | 1 | 10 |
| 2007 | 2 | 3 |
| 2008 | 4 | 4 |
| 2009 | 2 | 5 |
| 2010 | 2 | 4 |
| 2011 | 2 | 3 |
| 2012 | 5 | 7 |
| 2013 | 0 | 12 |
| 2014 | 4 | 4 |
| 2015 | 6 | 11 |
| 2016 | 10 | 12 |
| 2017 | 8 | 12 |
| 2018 | 14 | 14 |
| 2019 | 12 | 7 |
| 2020 | 10 | 6 |
| 2021 | 2 | 5 |
| 2022 | 6 | 10 |
| 2023 | 5 | 3 |
| 2024 | 6 | 11 |
| 2025 | 5 | 7 |
| 2026 | 0 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Air blower2 Dec 2025US 12,486,855 B2Coway Co., Ltd.
- Cross-flow fan and air conditioner9 Sep 2025US 12,410,811 B2Gree Electric Appliances, Inc. of Zhuhai
- Centrifugal compressor2 Sep 2025US 12,404,866 B1Kabushiki Kaisha Toyota Jidoshokki
- Fan and indoor equipment8 Apr 2025US 12,270,402 B2Fujitsu General Limited
- Blower and indoor unit8 Apr 2025US 12,270,403 B2Fujitsu General Limited
- Fan Impeller Mid-Segment, Cross-Flow Fan Impeller and Air Conditioner27 Aug 2026US 2026/0251160 A1Gree Electric Appliances, Inc. of Zhuhai
- Volute, fan and air conditioner30 Jul 2026US 2026/0218722 A1Gd Midea Air-Conditioning Equipment Co., Ltd.
- Impeller for a fan and a range hood25 Jun 2026US 2026/0177059 A1Whirlpool (China) Co., Ltd.
- Vehicle blower unit25 Jun 2026US 2026/0177068 A1Hanon Systems
- Asymmetric impeller and multi-blade centrifugal fan21 May 2026US 2026/0139691 A1China Academy of Aerospace Aerodynamics Technology
Most cited
By later US patents
- Centrifugal blower wheel with an upwardly extending, smoothly contoured hub43US 5,988,979 AHoneywell Consumer Products, Inc. · 1999
- Blower wheel with axial inlet for ventilation41US 5,814,908 ASiemens Electric Limited · 1998
- Multiblade radial fan and method for making same37US 5,741,118 AToto Ltd. · 1998
- Rotating filtration cartridge and blower for HVAC applications37US 6,099,608 A3M Innovative Properties Company · 2000
- Method for designing a multiblade radial fan and a multiblade radial fan33US 6,050,772 AToto Ltd. · 2000