Title:
DUCTED FAN, MULTICOPTER, VERTICAL TAKEOFF AND LANDING AIRCRAFT, CPU COOLING FAN, AND RADIATOR COOLING FAN
Document Type and Number:
WIPO Patent Application WO/2019/069591
Kind Code:
A1
Abstract:
[Problem] To maximize the static thrust of a ducted fan. [Solution] This ducted fan 1 has a duct 10, a propeller 20, a motor 30, a housing 40, and a stator 50. The propeller 20 has a hub 21 disposed concentrically with respect to the duct 10, and four blades 22 provided at equal intervals on the outer periphery of the hub 21. The chord length CL of each of the blades 22 decreases gradually from the base toward a blade tip 22a, and expands from a blade tip vicinity section 22B toward a blade tip 21A.
Inventors:
HARADA MASASHI (JP)
Application Number:
PCT/JP2018/032006
Publication Date:
April 11, 2019
Filing Date:
August 29, 2018
Export Citation:
Assignee:
JAPAN AEROSPACE EXPLORATION (JP)
International Classes:
B64C27/20; B64C11/18; H01L23/467
Domestic Patent References:
| WO2012080737A2 | 2012-06-21 |
Foreign References:
| US20120003098A1 | 2012-01-05 | |||
| JP2011513688A | 2011-04-28 | |||
| CN102935892A | 2013-02-20 | |||
| US20020104919A1 | 2002-08-08 | |||
| US20110182740A1 | 2011-07-28 | |||
| JP2009539033A | 2009-11-12 | |||
| US20140234112A1 | 2014-08-21 | |||
| US20120195767A1 | 2012-08-02 | |||
| JP2000264295A | 2000-09-26 |
Attorney, Agent or Firm:
OMORI, Junichi (JP)
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