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, 2009
Filed:
Jun. 01, 2006
Tsutomu Hatsugai, Wako, JP;
Takahiro Ideguchi, Wako, JP;
Yutaka Tabata, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
In a multi-blade fan for an air-cooled engine, by defining the inlet angle βand the angle β'to make the sum thereof less than 80° (preferably defining βas 32° and β′as 36°), the multi-blade fan achieves greater air volume than in the case where the sum is made 80° or greater, where βis the angle between the relative velocity direction and the peripheral direction on the inlet side of the blades, βis the angle between the relative velocity direction and the peripheral direction on the outlet side of the blades, and β′is the difference obtained by subtracting βfrom 180°. The number of blades can therefore be reduced to realize lower noise level while still maintaining the same air volume as the prior art multi-blade fan.