Patent US4468800A successfully refreshed from Google Patents.
US4468800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary anode X-ray tube
Assignee: Siemens AG
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Filing: 1981-06-04
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Granted: 1984-08-28
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Expires: 2001-06-04
Abstract
Abstract In exemplary embodiments, the anode is driven by an induction motor, between the stator and rotor of which the wall of the vacuum envelope of the tube is disposed. To reduce the overall length and the lever actions of the weight of the anode which act on the bearing which are disadvantageous in this construction, the disclosure provides an annular anode which is disposed in the same plane with the drive rotor. The rotor and stator can here be surrounded by the ring of the anode or they can be secured externally about the latter. X-ray tubes in accordance with the disclosure are particularly suited for use for the purpose of medical x-ray examination.
Inventors
- 👤 Rudolf Friedel
- 👤 Ernst Geldner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:08
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/101; H01J35/1017; H01J35/103; H01J2235/00; H01J2235/10; H01J2235/1026; H01J2235/1046; H01J2235/1073; H01J2235/12; H01J2235/1225; H01J2235/1262; H01J2235/1266
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
137 words
A rotary anode x-ray tube comprising a tube wall, an annular anode mounted for rotation about a central axis, motor means comprising a stator and rotor on opposite sides of the tube wall, the annular anode as well as the stator and the rotor being disposed concentrically inside is free of any shaft, and which has a rotor cylindrical surface at the side of said rotor sleeve toward said annular anode, bearing means for directly supporting the rotor sleeve itself, and the annular anode having an anode annular surface concentric with said central axis, the central part of said rotor cylindrical surface being connected with said anode annular surface to provide a supporting and driving coupling between said rotor and said annular anode, said annular anode surrounding said rotor sleeve and said stator being inside said rotor.
Claim 2
Dependent Claim
137 words
A rotary anode x-ray tube comprising a tube wall, an annular anode mounted for rotation about a central axis, motor means comprising a stator and rotor on opposite sides of the tube wall, the annular anode as well as the stator and the rotor being disposed concentrically inside is free of any shaft, and which has a rotor cylindrical surface at the side of said rotor sleeve toward said annular anode, bearing means for directly supporting the rotor sleeve itself, and the annular anode having an anode annular surface concentric with said central axis, the central part of said rotor cylindrical surface being connected with said anode annular surface to provide a supporting and driving coupling between said rotor and said annular anode, said annular anode surrounding said rotor sleeve and said stator being inside said rotor.
Claim 3
Dependent Claim
21 words
A rotary anode x-ray tube according to claim 1, characterized in that the motor means is surrounded by the annular anode.
Claim 4
Dependent Claim
20 words
A rotary anode x-ray tube according to claim 2, characterized in that the space containing the stator receives a coolant.
Claim 5
Dependent Claim
35 words
A rotary anode x-ray tube according to claim 3, characterized by means providing a through-flow path for the coolant which is delivered between the tube wall and the stator and which is centrally carried away.
Claim 6
Dependent Claim
23 words
A rotary anode x-ray tube according to claim 1, characterized in that means for electrically contacting of the anode comprises a central contact.
Claim 7
Dependent Claim
71 words
A rotary anode x-ray tube according to claim 1, characterized in that the anode has an annular anode member and a ceramic ring, and that the stator of the motor means is disposed on the opposite side of the ceramic ring from the annular anode member, said ceramic ring being connected at respective opposite sides thereof with the central part of said rotor cylindrical surface and with said anode annular surface.
Claim 8
Dependent Claim
23 words
A rotary anode x-ray tube according to claim 1, characterized in that said bearing means comprise a magnetic bearing for mounting the anode.
Claim 9
Dependent Claim
150 words
A rotory anode x-ray tube comprising a tube wall, an annular anode mounted for rotation about a central axis, motor means comprising a stator and rotor on opposite sides of the tube wall, the annular anode as well as the stator and the rotor being disposed concentrically inside one another, the rotor being in the form of a rotor sleeve which is free of any shaft, and which has a rotor cylindrical surface at the side of said rotor sleeve toward said annular anode, bearing means for directly supporting the rotor sleeve itself, and the annular anode having an anode annular surface concentric with said central axis, the central part of said rotor cylindrical surface being connected with said anode annular surface to provide a supporting and driving coupling between said rotor and said annular anode, the annular anode being inside said rotor sleeve, said rotor being inside said stator.
Claim 10
Dependent Claim
150 words
A rotory anode x-ray tube comprising a tube wall, an annular anode mounted for rotation about a central axis, motor means comprising a stator and rotor on opposite sides of the tube wall, the annular anode as well as the stator and the rotor being disposed concentrically inside one another, the rotor being in the form of a rotor sleeve which is free of any shaft, and which has a rotor cylindrical surface at the side of said rotor sleeve toward said annular anode, bearing means for directly supporting the rotor sleeve itself, and the annular anode having an anode annular surface concentric with said central axis, the central part of said rotor cylindrical surface being connected with said anode annular surface to provide a supporting and driving coupling between said rotor and said annular anode, the annular anode being inside said rotor sleeve, said rotor being inside said stator.
Claim 11
Dependent Claim
65 words
A rotary anode x-ray according to claim 8, characterized in that the anode has a ceramic ring, and that the stator of the motor means is disposed on the opposite side of the ceramic ring from the annular anode member, said ceramic ring being connected at respective opposite sides thereof with the central part of said rotor cylindrical surface and with said anode annular surface.
References Cited (Backward Citations)
US3894239A
Cited
US4167671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |