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.

Date of Patent:
Sep. 14, 1993

Filed:

Oct. 11, 1991
Applicant:
Inventors:

William P Gallivan, London, CA;

Haran K Periyathamby, London, CA;

Assignee:
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D / ; F04D / ;
U.S. Cl.
CPC ...
416189 ; 4161 / ; 416242 ; 4152082 ; 4152112 ; 415220 ;
Abstract

The fan has an outer circular band that is spaced axially rearwardly of the hub. Forwardly skewed blades extend between the band and hub. Each blade has a radially intermediate portion that has reverse curvatures, namely a radially inner section curving about a location that is axially rearwardly of the blade and a radially outer section curving about a location that is axially forwardly of the blade. The fan is disposed within an aperture of a shroud having a central mount for an electric motor that drives the fan. The shroud has radial members that extend from the edge of the shroud aperture to the hub and that contain an axial offset.


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