Patent ID: 6707882
Filing Date: 2004-03-16
Classification: H01J,H05G

Abstract:
An x-ray tube comprising:an envelope which encloses an evacuated chamber; a cathode disposed within the chamber for providing a source of electrons; an anode disposed within the chamber positioned to be struck by the electrons and generate x-rays; a bearing assembly surrounded by the anode, the bearing assembly including a stationary portion and a rotatable portion, the rotatable portion being connected with the anode and rotating with the anode relative to the stationary portion during operation of the x-ray tube; and a heat shield between the bearing assembly and the anode which reduces the radiative transfer of heat from the anode to the bearing assembly, the heat shield including a first generally cylindrical body and a second generally cylindrical body spaced from the first generally cylindrical body by a vacuum gap, the first and second generally cylindrical bodies being disposed between the target portion of the anode and the bearing assembly.