X-ray or gamma ray systems or devices – Source – Electron tube
Patent
1995-05-03
1996-01-02
Porta, David P.
X-ray or gamma ray systems or devices
Source
Electron tube
378136, 378 15, H01J 3504
Patent
active
054815851
ABSTRACT:
The rotary cathode X-ray tube equipment of the present invention is constructed so as to permit radiation of X-ray from all directions with respect to the whole circumference of a subject, and is used for x-ray CT. The equipment of the invention is constructed to prevent an X-ray radiation window 40 of a low strength from being influenced by atmospheric deformations of a vacuum vessel 1 or by machining and assembling errors, for example by using a joint portion disposed between the X-ray radiation window and an inner ring and having both a surface perpendicular to a rotational axis of a rotary member and a cylindrical surface parallel to the rotational axis, a face seal formed on the surface of the joint portion perpendicular to the rotational axis, and an axial seal formed on the cylindrical surface of the joint portion parallel to the rotational axis.
REFERENCES:
patent: 4099059 (1978-07-01), Distler
patent: 5090048 (1992-02-01), Blake
patent: 5268955 (1993-12-01), Burke et al.
Daikoku Akihiro
Horikawa Hiroshi
Ikeshima Tetsuhiko
Inoue Masao
Kimura Yutaro
Mitsubishi Denki & Kabushiki Kaisha
Porta David P.
Shimadzu Corporation
Wong Don
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