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:
Jan. 25, 2022
Filed:
Oct. 08, 2020
Nidec Corporation, Kyoto, JP;
Hideyuki Takemoto, Kyoto, JP;
Kazuhiro Inouchi, Kyoto, JP;
NIDEC CORPORATION, Kyoto, JP;
Abstract
An impeller includes Z blades, where Z is an integer equal to 5 or more, arranged in a circumferential direction of the impeller and extending radially, pitch angles between adjacent blades being all different. In terms of an arbitrary pitch angle θ, when a pitch angle αadjacent to the pitch angle θ, and a pitch angle αadjacent to the pitch angle θ, different from the pitch angle αsatisfy a relation, αa pitch angle βdifferent from the pitch angle θ adjacent to the pitch angle αand a pitch angle βadjacent to the pitch angle βdifferent from the pitch angle θ, satisfy a relation, β