US4344012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anode disc for a rotary-anode X-ray tube
Assignee: US Philips Corp
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Filing: 1980-03-11
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Granted: 1982-08-10
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Expires: 2000-03-11
Abstract
Abstract The focal path (4) of an anode disc in accordance with the invention is provided on a pyrographite ring (1) which is oriented so that the surfaces of higher thermal and electrical conductivity extend parallel to the axis of rotation (3) of the anode disc. As a result, suitable removal of heat can be ensured without thermal overloading of the bearings.
Inventors
- 👤 Horst Hubner
- 👤 Bernhard Lersmacher
- 👤 Hans Lydtin
- 👤 Rolf Wilden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:52
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/108
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
65 words
An anode disc for a rotary-anode X-ray tube, comprising a supporting body connected to a ring of pyrographite which is concentric with an axis about which the disc is rotated in operation, said ring having a surface forming a focal path and surfaces of higher and lower thermal conductivity, characterized in that the surfaces of higher thermal conductivity extend parallel to the axis of rotation.
Claim 2
Dependent Claim
65 words
An anode disc for a rotary-anode X-ray tube, comprising a supporting body connected to a ring of pyrographite which is concentric with an axis about which the disc is rotated in operation, said ring having a surface forming a focal path and surfaces of higher and lower thermal conductivity, characterized in that the surfaces of higher thermal conductivity extend parallel to the axis of rotation.
Claim 3
Dependent Claim
20 words
An anode disc as in claim 1, characterized in that the focal path is transverse to the axis of rotation.
Claim 4
Dependent Claim
17 words
An anode disc as in claim 1 characterized in that the pyrographite ring surrounds the supporting body.
Claim 5
Dependent Claim
31 words
An anode disc as in claim 1, characterized in that the supporting body includes a groove which is concentric to the axis of rotation, the ring being inserted in this groove.
Claim 6
Dependent Claim
34 words
An anode disc as in claim 3 or 4, characterized in that the pyrographite ring is an integral unit, the surfaces of higher thermal conductivity of the ring concentrically enclosing the axis of rotation.
Claim 7
Dependent Claim
19 words
An anode disc as in claim 3 or 4, characterized in that the ring comprises individual segments of pyrographite.
Claim 8
Dependent Claim
48 words
An anode disc as in claim 6 and further including a heat trapping ring whose thermal conductivity in the radial direction is substantially lower than that of the pyrographite ring, said heat trapping ring being arranged between the inner diameter of the pyrographite ring and the supporting body.
Claim 9
Dependent Claim
39 words
An anode disc as in claim 7, characterized in that the heat trapping ring consists of pyrographite and has surfaces of higher and lower thermal conductivity, the surfaces of higher thermal conductivity extending concentrically about the axis of rotation.
Claim 10
Dependent Claim
17 words
An anode disc as in claim 6 and further including an outer ring surrounding the segmented ring.
Claim 11
Dependent Claim
20 words
An anode disc as in claim 9, characterized in that the outer ring includes apertures on its radially outer side.
Claim 12
Dependent Claim
16 words
A rotary-anode X-ray tube comprising an anode disc as in claim 1, 2, 3 or 4.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |