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US 4,641,332 AGranted
X-ray tube comprising anode disc rotatably supported by bearing having push-pull bearing on an axial face
AssigneeU.S. Philips Corporation
InventorJan Gerkema
Life of this patent
Estimating the term…
Abstract
The bearing in an X-ray tube comprising a liquid metal lubricated helical-groove bearing is provided with a push-pull bearing at one or both end faces of a bearing member. Consequently, the bearing member need not be further secured so that, notably in the case of suitable cooling of the anode disc and the bearing, extremely precise positioning of the radiation object point in the tube can be achieved.
Claims10
An X-ray tube comprising an anode disc which is rotatably supported by a bearing member comprising cylindrical and axial face components;
- the improvement therein comprising said bearing member having a push-pull bearing on an axial face, said axial face having a pattern of helical grooves on it, and a liquid metal lubricant cooperating with said pattern of helical grooves so that a comparatively strong negative pressure occurs on said axial face upon rotation of said bearing member.
Dependencies are inferred from the claim text.