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:
May. 02, 2006
Filed:
Oct. 11, 2002
Yoshiaki Oono, Osaka, JP;
Masahiro Saito, Osaka, JP;
Yoshiaki Oono, Osaka, JP;
Masahiro Saito, Osaka, JP;
Yanmar Co., Ltd., , JP;
Abstract
Whereas for each propeller blade of a radiator fan, an attachment angle θat a propeller blade base portion, projected onto a plane parallel to an attachment surface of the propeller blades with respect to the boss is set in a range of 35 to 45°, an attachment angle θof a propeller blade tip portion is set in a range of 15 to 22°. Seven propeller blades and a chord length Ct of the propeller blade tip portion, and an outer circumference length π×Df of the propeller blades are set to satisfy a relationship 0.65<7Ct/(π×Df)<0.85. A tip broadening ratio of the propeller blades is set to within a range Ct/Cb=1.5 to 2.1, based on the chord length Ct at the propeller blade tip portion, and a chord length Cb at the propeller blade base portion. A fan sweep angle θis set in a range of 15 to 25°.