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:
Sep. 30, 2014
Filed:
Jan. 23, 2008
Yutaka Yamashita, Hitachi, JP;
Shigeki Senoo, Hitachi, JP;
Eiji Saito, Hitachi, JP;
Takeshi Kudo, Hitachinaka, JP;
Tateki Nakamura, Hitachi, JP;
Yutaka Yamashita, Hitachi, JP;
Shigeki Senoo, Hitachi, JP;
Eiji Saito, Hitachi, JP;
Takeshi Kudo, Hitachinaka, JP;
Tateki Nakamura, Hitachi, JP;
Mitsubishi Hitachi Power Systems, Ltd., Kanagawa, JP;
Abstract
A turbine bucket for a steam turbine low-pressure final stage has an exhaust area exceeding 9.6 mand 13.8 min steam-turbine final-stage buckets for a rated speed 3600 rpm and 300 rpm machines, respectively. The turbine bucket is made of martensite steel. A blade portion of the turbine bucket has a suction surfaceand a pressure surfacewhich are each formed, at a turbine blade root, of three areas consisting of a steam inlet side areawith curvature, a steam outlet side areawith curvature and an approximately straightly formed area located between the two areas.