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:
Apr. 13, 2010
Filed:
May. 20, 2009
Tetsuya Yonezawa, Yaita, JP;
Hironori Nakamuta, Otawara, JP;
Ryoichi Takahashi, Yokosuka, JP;
Yasuo Yoshii, Kawasaki, JP;
Hitoshi Hattori, Yokohama, JP;
Yasutaka Ito, Kawasaki, JP;
Tetsuya Yonezawa, Yaita, JP;
Hironori Nakamuta, Otawara, JP;
Ryoichi Takahashi, Yokosuka, JP;
Yasuo Yoshii, Kawasaki, JP;
Hitoshi Hattori, Yokohama, JP;
Yasutaka Ito, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Electron Tubes & Devices Co., Ltd., Tochigi-ken, JP;
Abstract
A rotating anode X-ray tube includes a fixed body having a radial sliding bearing surface and a channel therein through which a coolant flows, a rotor including a discoid large-diameter portion, which has a recess fitted with one end portion of the fixed body with a clearance therebetween and constitutes an anode target, and a small-diameter portion, which has on an inner surface thereof a radial sliding bearing surface which faces the aforesaid radial sliding bearing surface with a clearance, and is united with the large-diameter portion at one end portion thereof, a lubricant filling the clearances, a cathode arranged opposite to the anode target, and a vacuum envelope which contains the fixed body, the rotor, the lubricant and the cathode, and fixes the fixed body at another end portion of the fixed body situated opposite the one end portion of the fixed body fitted in the recess.