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:
Jul. 29, 2003
Filed:
Sep. 18, 2001
Sylvain Nadeau, London, CA;
Konstantin Kurbatskii, London, CA;
Siemens Automotive, Inc., Mississauga, CA;
Abstract
A low tone axial flow fan structure includes a hub an inner fan including a number of inner blades attached to the hub and extending radially outwardly to a first circumferentially extending blade support structure and an outer fan including a number of outer blades attached to the first circumferentially extending blade support structure and extending radially outwardly to a second circumferentially extending blade support structure The number of outer blades defines an outer fan blade passing order. The number of inner blades ensures creation of blade passing orders or multiple of said blade passing orders within one blade passing order of the outer fan blade passing order so as to provide masking of the outer fan blade passing order.