Patent US3710170A successfully refreshed from Google Patents.
US3710170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube with rotary anodes
Assignee: Siemens AG
•
Filing: 1970-09-11
•
Granted: 1973-01-09
•
Expires: 1990-09-11
Abstract
Abstract An X-ray tube has a rotary anode which is a compound body with parts of heavy metal and graphite, the focal point path lying upon the heavy metal. The invention is particularly characterized by the provision of at least one graphite part at the heavy metal part outside of the focal point path.
Inventors
- 👤 R Friedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:49
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/108
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
24 words
An X-ray tube in accordance with claim 1, wherein graphite parts are applied only to the underside of the part consisting of heavy metal.
Claim 2
Dependent Claim
19 words
An X-ray tube in accordance with claim 1, wherein the graphite parts are soldered by a layer of soldering.
Claim 3
Dependent Claim
30 words
An X-ray tube in accordance with claim 1, wherein the heavy metal part has bore holes, several graphite parts having the shape of plugs being fixed in said bore holes.
Claim 4
Dependent Claim
15 words
An X-ray tube in accordance with claim 4, wherein the bore holes have rounded ends.
Claim 5
Dependent Claim
33 words
An X-ray tube in accordance with claim 1, wherein the heavy metal part has annular grooves extenDing concentrically to its rotary axis, the graphite part consisting of graphite rings inserted into said grooves.
Claim 6
Dependent Claim
17 words
An X-ray tube in accordance with claim 6, wherein said graphite rings are divided radially into segments.
Claim 7
Dependent Claim
28 words
An X-ray tube in accordance with claim 1, wherein the graphite part consists of strips mounted as radial cooling ribs upon the underside of the heavy metal part.
Claim 8
Dependent Claim
27 words
An X-ray tube in accordance with claim 1, wherein the entire underside of the heavy metal part is covered by the graphite part consisting of a plate.
Claim 9
Dependent Claim
25 words
An X-ray tube in accordance with claim 2, wherein graphite parts are additionally applied to the upper side of the part consisting of heavy metal.
Claim 10
Dependent Claim
17 words
An X-ray tube in accordance with claim 9, wherein the graphite parts have concentrical and/or radial cutouts.
Claim 11
Dependent Claim
21 words
An X-ray tube in accordance with claim 1, wherein the heavy metal part has the shape of a rotary anode plate.
Claim 12
Dependent Claim
15 words
An X-ray tube in accordance with claim 1, wherein the heavy metal consists of molybdenum.
Claim 13
Dependent Claim
21 words
An X-ray tube in accordance with claim 3, wherein the layer of soldering consists of the eutectic of zirconium and tungsten.
Claim 14
Dependent Claim
25 words
An X-ray tube in accordance with claim 3, wherein the layer of soldering consists of an alloy containing 70 percent zirconium and 30 percent molybdenum.
Claim 15
Dependent Claim
22 words
An X-ray tube in accordance with claim 3, wherein the layer of soldering consists of the eutectic of molybdenum and molybdenum carbide.
Claim 16
Dependent Claim
34 words
An X-ray tube in accordance with claim 1, wherein the heavy metal part consists of molybdenum and wherein the graphite parts are fixed to the heavy part by heating to a temperature of 2200*C.
Claim 17
Dependent Claim
34 words
An X-ray tube in accordance with claim 3, wherein the surfaces of the graphite parts which are to be soldered are initially coated with a layer of zirconium carbide, tantalum carbide or hafmium carbide.
Claim 18
Dependent Claim
16 words
An X-ray tube in accordance with claim 3, wherein the soldering consists of zirconium or hafmium.
References Cited (Backward Citations)
US3579022A
Cited
US3610984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |