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:
May. 29, 2012
Filed:
Mar. 26, 2007
Applicants:
Takeshi Murooka, Tokyo, JP;
Ikuhisa Mizuta, Tokyo, JP;
Inventors:
Takeshi Murooka, Tokyo, JP;
Ikuhisa Mizuta, Tokyo, JP;
Assignee:
IHI Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B63H 1/26 (2006.01); B63H 7/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A leading edge part of a fan rotating blade for taking air thereinto is provided with a vertical hub portion positioned on the hub side so as to be substantially perpendicular to a fan rotary shaft, a backward mid-span portion inclined toward the downstream side from the hub side to the mid-span portion, and a forward inclined tip portion inclined toward the upstream side from the mid-span side to the tip portion.