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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.:

US 9653248 B1

PDFFull Text
Date of Patent:
May. 16, 2017

Filed:

Dec. 24, 2014

X-ray tube

Applicants:

Kabushiki Kaisha Toshiba, Minato-ku, JP;

Toshiba Electron Tubes & Devices Co., Ltd., Otawara-shi, JP;

Inventors:

Tomonari Ishihara, Otawara, JP;

Naoki Akahori, Otawara, JP;

Hidero Anno, Otawara, JP;

Assignee:

Toshiba Electron Tubes & Devices Co., Ltd., Otawara-shi, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Anastasia Midkiff

Int. Cl.
CPC ...
H01J 35/14 (2006.01); H01J 35/06 (2006.01); H01J 3/06 (2006.01); H01J 29/50 (2006.01); H01J 37/065 (2006.01); H01J 19/42 (2006.01); H01J 19/10 (2006.01); H01J 1/88 (2006.01); A61B 6/00 (2006.01); H01J 1/16 (2006.01); H01J 1/18 (2006.01); H01J 23/083 (2006.01); H01J 3/18 (2006.01); H01J 23/04 (2006.01); H01J 29/04 (2006.01); H01J 29/62 (2006.01);
U.S. Cl.
CPC ...
H01J 35/06 (2013.01); H01J 3/06 (2013.01); H01J 19/10 (2013.01); H01J 19/42 (2013.01); H01J 29/50 (2013.01); H01J 35/14 (2013.01); H01J 37/065 (2013.01); A61B 6/44 (2013.01); H01J 1/16 (2013.01); H01J 1/18 (2013.01); H01J 1/88 (2013.01); H01J 3/18 (2013.01); H01J 23/04 (2013.01); H01J 23/083 (2013.01); H01J 29/04 (2013.01); H01J 29/62 (2013.01); H01J 2229/481 (2013.01); H01J 2229/4827 (2013.01); H01J 2229/4831 (2013.01); H01J 2229/50 (2013.01); H01J 2229/582 (2013.01); H01J 2229/5835 (2013.01); H01J 2235/06 (2013.01); H01J 2237/032 (2013.01); H01J 2237/049 (2013.01); H01J 2237/06375 (2013.01); H01J 2893/0005 (2013.01); H01J 2893/005 (2013.01); H01J 2893/0088 (2013.01); H01J 2893/0089 (2013.01); H01J 2893/0094 (2013.01);
Abstract

According to one embodiment, an X-ray tube includes an anode target, a cathode including a filament and a convergence electrode which includes a groove portion, and an envelope. The groove portion includes a pair of first bottom surfaces which are located in the same plane as the filament and between which the filament is interposed in a width direction of the groove portion, and a pair of second bottom surfaces between which the filament and the pair of first bottom surfaces are interposed in a length direction of the groove portion and which are located closer to an opening of the groove portion than the pair of first bottom surfaces.

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