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. 02, 2012
Filed:
Jan. 23, 2008
Nobuaki Kizuka, Hitachinaka, JP;
Hidetaro Murata, Hitachi, JP;
Hidetoshi Kuroki, Hitachi, JP;
Kenji Nanataki, Hitachi, JP;
Nobuaki Kizuka, Hitachinaka, JP;
Hidetaro Murata, Hitachi, JP;
Hidetoshi Kuroki, Hitachi, JP;
Kenji Nanataki, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An airfoil profile is formed such that a passage width ratio, represented in a dimensionless manner, of an inter-blade passage width of vane root cross-section to an outlet throat width substantially monotonously decreases from a blade inlet toward a blade outlet. The blade has a blade airfoil profile shape in an envelope within a range of .+−.2.0 mm in a direction normal to any surface location of an airfoil profile portion. The airfoil profile portion has a reference airfoil contour represented in Cartesian coordinates wherein Z is a distance representing a sectional height from a root of the airfoil profile portion. The contours represented by X and Y at each section Z are joined smoothly with one another in a blade height direction to form a complete shape of the airfoil profile portion.