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:
Oct. 22, 2019
Filed:
Apr. 20, 2015
Mitsubishi Electric Corporation, Tokyo, JP;
Kazuki Isomura, Tokyo, JP;
Makoto Kurihara, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
Provided is a turbofan producing reduced noise and easily manufactured. A coupling portion between a blade main portion and a blade cover is formed in a surface region (pressure surface) parallel to a direction of air flowing over the pressure surface of each blade. With this configuration, the air sucked from a direction of a rotation axis of a turbofan is less liable to enter a gap of the coupling portion of the blade, thereby being capable of reducing noise. Further, noise is reduced so that high-precision dimensional control of the gap of the coupling portion of the blade is not required. Consequently, dimensional control at the time of manufacture is facilitated to thereby facilitate manufacture.