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. 07, 1996
Filed:
Mar. 28, 1994
Nippondenso Co., Ltd., Kariya, JP;
Abstract
The present invention relates to a fan having a plurality of equiangularly spaced, radially extending blades. The spacing provided between adjacent blades is substantially constant along the entire radial length of the blade for increasing a blowing efficiency, while also allowing a mold separation operation along the axial direction during the formation of the fan using a mold. In a case where the blade is a sweep-forward blade, the number of the blades is seven or more and has a sweep-forward angle of the blades between 35 to 45 degrees. Finally, in case where an electric motor for rotating the fan is supported by stays, the number of stay member and the number of blades, which are not evenly dividable by each other, should satisfy a relationship of 2,000<x.times.y.times.Nf/60, where N.sub.f is a rotational speed of the fan.