The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 2020
Filed:
Oct. 24, 2017
Applicant:
Nidec Corporation, Kyoto, JP;
Inventor:
Ryosuke Ishida, Kyoto, JP;
Assignee:
NIDEC CORPORATION, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 29/52 (2006.01); F04D 29/54 (2006.01); F04D 19/00 (2006.01); F04D 25/08 (2006.01);
U.S. Cl.
CPC ...
F04D 29/522 (2013.01); F04D 19/002 (2013.01); F04D 25/08 (2013.01); F04D 29/526 (2013.01); F04D 29/545 (2013.01);
Abstract
An axial fan according to an exemplary embodiment of the present disclosure includes an impeller, a motor, and a housing. The impeller is configured to rotate about a rotation axis extending in a vertical direction. The motor is configured to rotationally drive the impeller. The housing is disposed radially outside the impeller and the motor. In a region overlapping in the vertical direction with the impeller, an inner wall surface of the housing includes at least one first wall having a narrow gap with a radially outer edge of the impeller and at least one second wall having a wide gap with the radially outer edge of the impeller.