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:
Mar. 18, 1997
Filed:
Jul. 27, 1994
Applicant:
Inventors:
Akira Yoshinari, Katsuta, JP;
Hideki Tamaki, Hitachi, JP;
Tosiaki Saito, Katsuta, JP;
Mitsuru Kobayashi, Hitachiota, JP;
Katsumi Iijima, Hitachi, JP;
Katsuo Wada, Hitachi, JP;
Kimio Kano, Sendai, JP;
Hiroyuki Matsuzaki, Sendai, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Tohoku Electric Power Co., Inc., Miyagi-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D / ;
U.S. Cl.
CPC ...
4162 / ; 148404 ; 148902 ; 1641221 ; 1641222 ;
Abstract
A gas-turbine moving blade made of a Ni-base superalloy containing less grain boundary strengthening elements, in which a blade portion is formed of a single crystal and the rest is formed of columnar crystals, and a gas turbine including the moving blade. A thermal efficiency of the gas turbine can be improved to 35% or more, and a thermal efficiency of complex power generation with a steam turbine can be improved to 45% or more.