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:
Aug. 04, 1987
Filed:
May. 01, 1986
Applicant:
Inventor:
Alessandro Perosino, Turin, IT;
Assignee:
Gate S.p.A., Asti, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
416189 ; 416238 ; 416D / ; 415119 ;
Abstract
An axial fan in which the median line (B) of each blade (3) has a first radially-innermost, rearwardly-directed curved portion (B.sub.1) and a second radially-outermost, forwardly-directed curved portion (B.sub.2), the former portion being between 25% and 50% of the full radial extent of the blade. The profile of the blade is characterized in that its circular thickness (S) increases progressively from the interior to the exterior, and the pitch setting angle (W) of the profile decreases progressively from the interior to the exterior.