Device to transfer high frequency electrical signals between a rotating component and a stationary component

A computed tomography gantry comprising:

• a gantry frame comprising a stator mounted therein;
• a rotor mounted in said gantry frame for rotation relative to said stator, said rotor being configured to co-rotatably carry computed tomography imaging components thereon;
• at least one brush attached to said stator, comprising a plurality of electrically conductive fibers that establish a sliding electrical contact with the rotor;
• a slideway mounted at a side of the rotor facing toward the stator, said brush being attached to said stator with the fibers thereof resting on the slideway;
• a lubricant located in the slideway;
• a capture device at the rotor configured to capture lubricant at a location in the slideway to which the lubricant is moved by centrifugal force occurring upon rotation of said stator;
• and
• at least one return element in fluid communication with said capture device that returns lubricant captured by the capture device to the slideway, said return element being attached at the stator.

A computed tomography apparatus comprising:

• a gantry frame comprising a stator mounted therein;
• a rotor mounted in said gantry frame for rotation relative to said stator;
• an x-ray source and a radiation detector mounted on said rotor for co-rotation therewith to generate computed tomography data from an examination subject around which said rotor rotates;
• at least one brush attached to said stator, comprising a plurality of electrically conductive fibers that establish a sliding electrical contact with the rotor;
• a slideway mounted at a side of the rotor facing toward the stator, said brush being attached to said stator with the fibers thereof resting on the slideway;
• a lubricant located in the slideway;
• a capture device at the rotor configured to capture lubricant at a location in the slideway to which the lubricant is moved by centrifugal force occurring upon rotation of said stator;
• and
• at least one return element in fluid communication with said capture device that returns lubricant captured by the capture device to the slideway, said return element being attached at the stator.