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:
Feb. 11, 1986
Filed:
Aug. 06, 1984
Applicant:
Inventor:
Leslie M Gray, III, Lincoln, MA (US);
Assignee:
Airflow Research and Manufacturing Corp., Watertown, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
416189 ; 416238 ; 416D / ; 4161 / ;
Abstract
A fan in which the root-to-tip net blade skew angle (A.sub.b) (either forward or rearward) is less than 1/2 of the blade spacing; in a first radially inward region of the blade, the blade is rearwardly skewed as indicated by the leading edge skew angle (A.sub.e); in a second region radially outward of the first region, the leading edge skew angle indicates a forward skew.