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:
Jun. 30, 2009
Filed:
Oct. 11, 2005
Friedrich Soechting, Miami, FL (US);
Charles Ellis, Miami, FL (US);
Yasuoki Tomita, Takasago, JP;
Yugo Tokunaga, Takasago, JP;
Friedrich Soechting, Miami, FL (US);
Charles Ellis, Miami, FL (US);
Yasuoki Tomita, Takasago, JP;
Yugo Tokunaga, Takasago, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
In order to provide a turbine blade fatigue life evaluating method for quantitively evaluating the fatigue life of a turbine blade, the turbine blade is determined to be within its fatigue life if the creep elongation strain in the longitudinal direction of the turbine blade is less than 0.5% of an initial length, and is determined to exceed its fatigue life if the creep elongation strain is 0.5% or more than the initial length. A turbine blade creep elongation strain measuring apparatuscomprises a first fixed end, a second fixed end, and a dial gauge. A dimension in the longitudinal direction is stamped on the surface of a turbine blade.