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:
Dec. 09, 2003
Filed:
Oct. 07, 2002
Denso Corporation, Kariya, JP;
Abstract
Front edges of blades are so constituted as to be deviated toward the upstream side in the air stream beyond an axial end surface , as viewed from a direction at right angles to the axial direction of a boss and the blades on the root side thereof are continuous to the axial end surface through smoothly curved surfaces This enables the air to flow from the side of the axial end surface toward the root side of the blades . Due to the air flowing from the side of the axial end surface to the root side of the blades therefore, the resistance decreases between the air and the surfaces of the blades on the root side, making it possible to suppress the occurrence of stalling on the root side of the blades The air on the front side of the boss is effectively guided toward the outer direction (toward the blades ), preventing a drop in the flow rate and in the fan efficiency of a blower