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:
Jan. 31, 2012
Filed:
Jan. 02, 2008
Kazutaka Ikeda, Tokyo, JP;
Takashi Sasaki, Kanagawa, JP;
Satoru Asai, Kanagawa, JP;
Hitoshi Sakakida, Tokyo, JP;
Kenji Kamimura, Kanagawa, JP;
Ryohei Ogino, Kanagawa, JP;
Yasushi Ooishi, Kanagawa, JP;
Kazutaka Ikeda, Tokyo, JP;
Takashi Sasaki, Kanagawa, JP;
Satoru Asai, Kanagawa, JP;
Hitoshi Sakakida, Tokyo, JP;
Kenji Kamimura, Kanagawa, JP;
Ryohei Ogino, Kanagawa, JP;
Yasushi Ooishi, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A steam turbine has: a casing; a rotor rotatably arranged in the casing; a nozzle diaphragm concentrically arranged with respect to the rotor, the nozzle diaphragm being engaged with the casing; moving blades arranged in circumferential direction on outer circumference of the rotor at positions adjacent to the nozzle diaphragm; seal strips circumferentially extending on tips of the moving blades, the seal strips protruding in radial outward direction; and an abradable structure rigidly connected to the nozzle diaphragm. The abradable structure faces the seal strips in radial direction at a facing surface, and has an abradable part made of an abradable material arranged at the facing surface.