Rotary anode X-ray tube
AssigneeSiemens Aktiengesellschaft
InventorsRudolf Friedel, Ernst Geldner
Life of this patent
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Abstract
In exemplary embodiments, the anode is driven by an induction motor, between the stator and rotor of which the wall of the vacuum envelope of the tube is disposed. To reduce the overall length and the lever actions of the weight of the anode which act on the bearing which are disadvantageous in this construction, the disclosure provides an annular anode which is disposed in the same plane with the drive rotor. The rotor and stator can here be surrounded by the ring of the anode or they can be secured externally about the latter. X-ray tubes in accordance with the disclosure are particularly suited for use for the purpose of medical x-ray examination.
Claims9
A rotary anode x-ray tube comprising a tube wall, an annular anode mounted for rotation about a central axis, motor means comprising a stator and rotor on opposite sides of the tube wall, the annular anode as well as the stator and the rotor being disposed concentrically inside is free of any shaft, and which has a rotor cylindrical surface at the side of said rotor sleeve toward said annular anode, bearing means for directly supporting the rotor sleeve itself, and the annular anode having an anode annular surface concentric with said central axis, the central part of said rotor cylindrical surface being connected with said anode annular surface to provide a supporting and driving coupling between said rotor and said annular anode, said annular anode surrounding said rotor sleeve and said stator being inside said rotor.
A rotory anode x-ray tube comprising a tube wall, an annular anode mounted for rotation about a central axis, motor means comprising a stator and rotor on opposite sides of the tube wall, the annular anode as well as the stator and the rotor being disposed concentrically inside one another, the rotor being in the form of a rotor sleeve which is free of any shaft, and which has a rotor cylindrical surface at the side of said rotor sleeve toward said annular anode, bearing means for directly supporting the rotor sleeve itself, and the annular anode having an anode annular surface concentric with said central axis, the central part of said rotor cylindrical surface being connected with said anode annular surface to provide a supporting and driving coupling between said rotor and said annular anode, the annular anode being inside said rotor sleeve, said rotor being inside said stator.
Dependencies are inferred from the claim text.