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. 06, 2001
Filed:
Feb. 11, 1999
Hiroki Fukuno, Hyogo-ken, JP;
Yasuoki Tomita, Hyogo-ken, JP;
Shigeyuki Maeda, Hyogo-ken, JP;
Yukihiro Hashimoto, Hyogo-ken, JP;
Kiyoshi Suenaga, Hyogo-ken, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A number of air-transpiration holes (,) are provided at a leading edge portion (,) of a cooled blade (,). Cooling air flowing through a cooling air passage (,) formed inside of the blade blows out to the blade surface of the leading edge portion (,) of the cooled blade (,) by way of the air-transpiration holes (,), to thereby shower-head cool the surface of the leading edge portion (,). The air-transpiration holes (,) are formed so as to extend substantially orthogonal to the leading edge surface of the cooled blade (,) such that the acute-angled portions are eliminated, whereby thermal stress is reduced and cracking is prevented.