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:
Oct. 07, 2025
Filed:
Jul. 22, 2024
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Energy Systems & Solutions Corporation, Kawasaki, JP;
Shogo Iwai, Ota, JP;
Tomohiko Tsukuda, Yokohama, JP;
Yoshifumi Iwasaki, Yokohama, JP;
Tsuguhisa Tashima, Yokohama, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, Kawasaki, JP;
Abstract
According to an embodiment, a turbine shaft sealing device suppresses leakage of a working fluid between a rotary part, and a lower half stationary part and an upper half stationary. Six packing ring segments of the turbine shaft sealing device are formed of a lower half center segment and two lower half side segments, and an upper half center segment and two upper half side segments, and configure an annular packing ring having an inner peripheral ring part on which a hook that engages with a hook engagement annular groove of the lower half stationary part and the upper half stationary part, and a seal fin protruding toward the rotary part side are arranged. A biasing part is formed of a lower half center biasing part, a lower half side biasing part, an upper half side biasing part, and upper half center biasing part.