Patent ID: 6926442
Filing Date: 2005-08-09
Classification: A61B

Abstract:
1. A dental X-ray device including at least one of a X-ray emanating unit and a X-ray image detector for producing X-ray images, said device comprising at least one movable supporting structure for a system adapted to be movable for the purpose of making the X-ray images, and having a stationary supporting structure on which said movable supporting structure is displaceably mounted by means of at least one bearing having bearing elements secured to at least one of said movable and stationary supporting structures, at least one of said movable and stationary supporting structures having a bearing face for the bearing elements, regulating means provided for shifting the movable supporting structure in a direction generally parallel to said bearing face, a drive for effecting rotation of said movable supporting structure about an axis generally perpendicular to said bearing face, said bearing elements being movable on the bearing face in any direction generally parallel to said bearing face, and said bearing elements being rotatable about an axis generally perpendicular to said bearing face, wherein the drive effects rotational movement of the movable supporting structure about an instant center, said regulating means including at least two actuators provided for effecting horizontal movement of the instant center independent of the rotational movement, said actuators for effecting said horizontal movement acting directly on a rotation axis of the system or indirectly via a coupled element which follows the center of rotation but does not follow the rotational movement.