Patent US4785201A successfully refreshed from Google Patents.
Patent EP0149869A2 successfully refreshed from Google Patents.
EP0149869A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
X-ray tube comprising a helical-groove bearing
Assignee: Koninklijke Philips NV
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Filing: 1984-12-19
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Granted: —
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Expires: 2004-12-19
Abstract
Abstract @ An X-ray tube comprising a rotary anode which is journalled in a helical-groove bearing is constructed so that the axial median plane of the rotary anode system is approximately coincident with the axial centre of the helical-groove bearing. The bearing block for the anode system is connected to the tube base preferably via a connection whose rigidity is adapted to the weight, the geometry and the weight distribution of the anode system, said connection allowing for cooling of the bearing block by means of a cooling liquid.
Inventors
- 👤 Jan Gerkema
- 👤 Johannes Ludovicus Maria Hagen
- 👤 Johan Adriaan Rietdijk
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 17:15
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/101; H01J35/1017; H01J35/104; H01J2235/00; H01J2235/10; H01J2235/1006; H01J2235/1013; H01J2235/1046; H01J2235/106; H01J2235/12; H01J2235/1225; H01J2235/1262; H01J2235/1266
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
56 words
An X-ray tube comprising an anode disc which is connected, via a rotary shaft, to a rotor which is journalled in a metal-lubricated helical-groove bearing, characterized in that the anode disc is journalled at one side only by means of a helical-groove bearing which is mounted about an axial median plane of the rotary anode system.
Claim 2
Dependent Claim
56 words
An X-ray tube comprising an anode disc which is connected, via a rotary shaft, to a rotor which is journalled in a metal-lubricated helical-groove bearing, characterized in that the anode disc is journalled at one side only by means of a helical-groove bearing which is mounted about an axial median plane of the rotary anode system.
Claim 3
Dependent Claim
55 words
An X-ray tube as claimed in Claim 1, characterized in that the bearing is formed by a cylindrical bearing block which is provided with helical grooves on a cylinder surface and on both end faces, said grooves cooperating in a bearing fashion with helical grooves provided in a bearing sleeve which supports the anode disc.
Claim 4
Dependent Claim
39 words
An X-ray tube as claimed in Claim 2, characterized in that the bearing block is connected, via a connection having a rigidity adapted to the anode system, to a tube base portion which is remote from the anode disc.
Claim 5
Dependent Claim
35 words
An X-ray tube as claimed in Claim 1, characterized in that the axial median plane of the rotary anode system is situated at least substantially halfway between two end faces of a cylindrical bearing block.
Claim 6
Dependent Claim
45 words
An X-ray tube as claimed in Claim 4, characterized in that the non-rotary portion of the bearing is connected to a tube base portion via an electricallly insulating ceramic connection, means being provided for applying a high voltage to the anode disc via the bearing.
Claim 7
Dependent Claim
46 words
An X-ray tube as claimed in any one of the preceding Claims, characterized in that wall portions of the helical-groove bearing which are provided with helical grooves are made of Mo or W, the helical-groove bearing being lubricated by means of Ga or a Ga alloy.
Claim 8
Dependent Claim
36 words
An X-ray tube as claimed in any one of the Claims 1 to 5, characterized in that the bearing sleeve and the bearing block are made mainly of steel, the bearing being heatable from the outside.
Claim 9
Dependent Claim
26 words
An X-ray tube as claimed in Claim 7, characterized in that the lubricant for the bearing consists of a metal alloy containing Bi, In and/or Pb.
Claim 10
Dependent Claim
40 words
An X-ray tube as claimed in any one of the preceding Claims, characterized in that at least a portion of the bearing block which faces the base portion of the tube is provided with a passage for a cooling liquid.
References Cited (Backward Citations)
No citation records indexed.
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