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:
May. 08, 2007
Filed:
Aug. 27, 2004
Harunobu Fukushima, Tokyo, JP;
Yasuo Yoshii, Kawasaki, JP;
Hitoshi Hattori, Yokohama, JP;
Koichi Kitade, Otawara, JP;
Mitsuo Iwase, Nasu-gun, JP;
Hironori Nakamuta, Otawara, JP;
Harunobu Fukushima, Tokyo, JP;
Yasuo Yoshii, Kawasaki, JP;
Hitoshi Hattori, Yokohama, JP;
Koichi Kitade, Otawara, JP;
Mitsuo Iwase, Nasu-gun, JP;
Hironori Nakamuta, Otawara, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
In a rotary anode type X-ray tube, a rotary anode and a rotary structure supporting the anode are arranged within the vacuum envelope. A stationary shaft has a middle section which is fitted into a cylindrical portion of the rotary structure, and a dynamic pressure type radial bearing is arranged between the cylindrical portion and the middle section. The stationary shaft also has a first section between one end of the middle section and one end of the stationary shaft, and a second section between the other end of the middle section and the other end of the stationary shaft, which are fixed to the vacuum envelope. A transverse stiffness of the second section is set to be larger than a transverse stiffness of the first section, and a center of gravity is positioned in the middle section.