Patent ID: 7961477

Claim:
A housing having a liquid-tight electric bushing, the housing comprising: an opening in the housing of an X-ray tube, wherein a coolant oil is circulated through the housing at an overpressure to cool the X-ray tube during operation thereof; a printed circuit board mounted to the housing and having at least first and second layers, the at least first and second layers being configured without a continuous opening such that the printed circuit board is a liquid-tight closure that prevents the coolant oil from flowing outside of the housing, the first layer being produced from an electrical insulation material and being a top side of the printed circuit board that spans the opening and the second layer being a conductor track in the interior of the printed circuit board, wherein a first contact element is disposed on the top side and in a bore through the first layer that extends to at least the second layer; a seal disposed around the opening in the housing and between the printed circuit board and the housing; and a pressure plate that contacts an underside of the printed circuit board and is mounted on the housing such that the pressure plate presses the first layer of the printed circuit board against the seal around the opening in the housing such that the first layer of the printed circuit board forms the liquid tight closure that prevents the coolant oil from flowing out the opening in the housing.