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:
Nov. 17, 2020
Filed:
Sep. 26, 2017
Applicant:
Sanyo Denki Co., Ltd., Tokyo, JP;
Inventors:
Yoshihisa Yamazaki, Tokyo, JP;
Satoshi Fujimaki, Tokyo, JP;
Takashi Kawashima, Tokyo, JP;
Souma Araki, Tokyo, JP;
Assignee:
SANYO DENKI CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01P 5/04 (2006.01); F04D 19/00 (2006.01); F04D 29/54 (2006.01); F04D 29/66 (2006.01); H05K 7/20 (2006.01);
U.S. Cl.
CPC ...
F01P 5/043 (2013.01); F04D 19/005 (2013.01); F04D 29/541 (2013.01); F04D 29/547 (2013.01); F04D 29/667 (2013.01); H05K 7/20145 (2013.01); F05D 2250/292 (2013.01); F05D 2250/711 (2013.01);
Abstract
A blast fan includes: a tubular frame having a first opening and a second opening to pass airflow through between the first opening and the second opening. The first opening has a first reverse tapered portion expanding from inside to outside of the frame, and the first reverse tapered portion has a surface having first convex portions projecting to the inside of the frame.