Patent US4520496A successfully refreshed from Google Patents.
US4520496A
Expired / Lapsed
US
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Rotary-anode X-ray tube
Assignee: US Philips Corp
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Filing: 1983-07-06
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Granted: 1985-05-28
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Expires: 2003-07-06
Abstract
Abstract The invention relates to an anode disc for a rotary-anode X-ray tube which consists of a rotationally-symmetrical body of molybdenum and a corresponding body of graphite. The connection zone between the two bodies is smaller than the inner diameter of the focal path. Thanks to this construction the connection zone between the two bodies will not be thermally overloaded.
Inventors
- 👤 Peter Schreiber
- 👤 Klaus Huth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:24
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/108
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
A rotary-anode X-ray tube comprising an anode disc having a body which comprises first and second rotationally-symmetrical, interconnected parts which are adjacently situated in the direction of an axis of rotation, the first part bearing a focal path on a surface extending transversely of said axis and consisting essentially of molybdenum or a molybdenum alloy and the second part consisting essentially of graphite, the volume of the second part amounting to at least one half of the volume of the first part, characterized in that an outer diameter of a connection zone between the first and second parts is smaller than an inner diameter of the focal path.
Claim 2
Dependent Claim
108 words
A rotary-anode X-ray tube comprising an anode disc having a body which comprises first and second rotationally-symmetrical, interconnected parts which are adjacently situated in the direction of an axis of rotation, the first part bearing a focal path on a surface extending transversely of said axis and consisting essentially of molybdenum or a molybdenum alloy and the second part consisting essentially of graphite, the volume of the second part amounting to at least one half of the volume of the first part, characterized in that an outer diameter of a connection zone between the first and second parts is smaller than an inner diameter of the focal path.
Claim 3
Dependent Claim
30 words
A rotary-anode X-ray tube as claimed in claim 1, characterized in that the second part has an outer diameter which is larger than the outer diameter of the connection zone.
Claim 4
Dependent Claim
23 words
A rotary-anode X-ray tube as claimed in claim 1, characterized in that the first part consists essentially of titanium, zirconium, molybdenum and carbon.
Claim 5
Dependent Claim
38 words
A rotary-anode X-ray tube as claimed in claim 1, 2 or 3, characterized in that on a side which is remote from the focal path the first part comprises an annular recess into which the second part projects.
Claim 6
Dependent Claim
50 words
A rotary-anode X-ray tube as claimed in claim 1, 2 or 3, characterized in that on a side which is remote from the focal path the first part is provided, outside the connection zone, with a thermally emissive layer consisting essentially of Al 2 O 3 and TiO 2 .
Claim 7
Dependent Claim
44 words
A rotary-anode as in claim 4, characterized in that on a side which is remote from the focal path the first part is provided, outside the connection zone, with a thermally emissive layer consisting essentially of Al 2 O 3 and TiO 2 .
References Cited (Backward Citations)
US2345722A
Cited
US2489080A
Cited
GB1337232A
Cited
US4063124A
Cited
US4119879A
Cited
GB2073945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |