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. 01, 2013
Filed:
Dec. 05, 2007
Applicants:
Hidetake Ota, Kiryu, JP;
Hirohiko Maekawa, Kiryu, JP;
Yuichi Katayama, Kiryu, JP;
Inventors:
Assignee:
Mitsuba Corporation, Gunma, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47C 7/74 (2006.01); A47C 21/04 (2006.01); B63H 1/00 (2006.01); B63H 3/00 (2006.01); B63H 5/00 (2006.01); B64C 11/00 (2006.01); B64C 27/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A cooling fan of the present invention includes: a bottomed cylindrical boss portion; and a plurality of blades provided on an outer circumferential surface of the boss portion, the blades radiating in a radial direction, in which a ring member for connecting the blades with each other is provided on a side radially inner from tips of the blades. According to the present invention, it is possible to provide a cooling fan capable of preventing the worsening of the noise characteristic and also of enhancing the versatility even if the blades are made thinner.