Rotary anode X-ray tube

X-ray or gamma ray systems or devices – Source – Electron tube

Reexamination Certificate

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Details

C378S132000, C378S144000

Reexamination Certificate

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07746982

ABSTRACT:
In a rotary anode X-ray tube, a disc portion is fitted into a rotary anode with a first gap therebetween and a fixed shaft is fitted into a rotary shaft to support the anode with a second gap therebetween. The disc portion and the fixed shaft are formed integral with each other to have a hollow portion therein. A cooling liquid is allowed to flow through the hollow portion. A liquid metal is filled in the first and second gaps. Dynamic pressure type bearings is formed in the second gap. A passage is formed to directly communicate the first gap to the second gap, whereby the liquid metal being directly supplied from the second gap to the first gap. Thus, the liquid metal can be fed rapidly and surely into the gap between the anode target and a cooling vessel.

REFERENCES:
patent: 3399000 (1968-08-01), Remmers
patent: 5068885 (1991-11-01), Vetter
patent: 5541975 (1996-07-01), Anderson et al.
patent: 5559852 (1996-09-01), Vetter
patent: 5583907 (1996-12-01), Ono et al.
patent: 5602898 (1997-02-01), Vetter et al.
patent: 5668849 (1997-09-01), Sugiura et al.
patent: 5737387 (1998-04-01), Smither
patent: 5809106 (1998-09-01), Kitade et al.
patent: 6430260 (2002-08-01), Snyder
patent: 6477232 (2002-11-01), Yoshida
patent: 6546078 (2003-04-01), Ide
patent: 6636583 (2003-10-01), Ratzmann et al.
patent: 7050541 (2006-05-01), Bittl
patent: 2960089 (1999-07-01), None

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