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:
Mar. 29, 2005
Filed:
Jun. 05, 2003
Applicants:
Brian Havel, London, CA;
Bonifacio Castillo, London, CA;
Inventors:
Brian Havel, London, CA;
Bonifacio Castillo, London, CA;
Assignee:
Siemens VDO Automotive Inc., Chatham, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D029/38 ;
U.S. Cl.
CPC ...
Abstract
A fanincludes a hub, a plurality of fan bladesattached to the hub at one end and extending outwardly from the hub, and a ringconcentric with the hub and coupled to tipsof the blades. A dimensionless radius (r/R) is defined from a center of the hub (r/R=0) radially outwardly, wherein each tip of the blades is r/R=1. A pitch ratio increases up to about r/R=0.85, and decreases in a range of about 0.85<r/R<1.0. In the range of about 0.6<r/R<1.0, a chord length decreases continually.