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:
Oct. 25, 1983
Filed:
Dec. 03, 1980
Applicant:
Inventor:
Makoto Okada, Tokyo, JP;
Assignee:
Nissan Motor Company, Limited, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
4162 / ; 4162 / ; 416D / ;
Abstract
A fluid propeller fan useful as but not limited to an air-circulating cooling fan for an automotive engine, wherein each of the vanes of the fan has a pitch angle which is gradually reduced from the tip or an intermediate portion toward the radially innermost end of the vane so as to provide an increased draught volume and improved draught flow characteristics.