Patent US4670895A successfully refreshed from Google Patents.
US4670895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube with a rotary anode and process for fixing a rotary anode to a support shaft
Assignee: General Electric CGR SA
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Filing: 1985-06-25
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Granted: 1987-06-02
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Expires: 2005-06-25
Abstract
Abstract The present invention relates to an X-ray tube with a rotary anode and to a process for fixing a rotary anode to a support shaft contained in such a tube. The rotary anode is fixed to the support shaft with the aid of a deformed element, positioned between the rotary anode and the support shaft, concentrically to the latter, and acting in the manner of a stuffing box.
Inventors
- 👤 Jean M. Penato
- 👤 Paul Hery
- 👤 Claude Bouhnik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:49
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/101; H01J35/1017; H01J2235/00; H01J2235/10; H01J2235/1006; H01J2235/1013
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
97 words
An X-ray tube comprising: a rotary anode having first and second opposite faces; an axial bore passing through a central portion of the rotary anode, the bore extending into at least one enlarged coaxial recess which is formed inwardly of a first corresponding anode face; a rotating shaft coaxially received in the bore and recess; and at least one permanently deformed ductile ring located within the recess and press fitted between a wall of the recess and an adjacent section of the shaft so as to secure the anode to the shaft and preventing relative motion therebetween.
Claim 2
Dependent Claim
97 words
An X-ray tube comprising: a rotary anode having first and second opposite faces; an axial bore passing through a central portion of the rotary anode, the bore extending into at least one enlarged coaxial recess which is formed inwardly of a first corresponding anode face; a rotating shaft coaxially received in the bore and recess; and at least one permanently deformed ductile ring located within the recess and press fitted between a wall of the recess and an adjacent section of the shaft so as to secure the anode to the shaft and preventing relative motion therebetween.
Claim 3
Dependent Claim
26 words
An X-ray tube as set forth in claim 1 further comprising a fastener engaging an end of the shaft and secured to the first anode face.
Claim 4
Dependent Claim
41 words
An X-ray tube as set forth in claim 1 wherein the recess further includes a coaxial groove formed in the wall of the shaft for receiving a portion of the deformed ring therein thus additionally securing the anode to the shaft.
Claim 5
Dependent Claim
84 words
An X-ray tube as set forth in claim 1 wherein: a second anode face has a second recess formed therein; a second deformed ductile ring is located within the second recess and is press fitted between a wall of the second recess and an adjacent section of the shaft; and the shaft has a shoulder formed therein for contacting the second face of the anode, the shoulder having a collar formed therein for deforming the second ring when the shoulder contacts the second face.
Claim 6
Dependent Claim
23 words
An X-ray tube as set forth in claim 1, wherein the ring is made from a refractory material having a low vapor tension.
Claim 7
Dependent Claim
29 words
An X-ray tube as set forth in claim 2, wherein the fastener has a collar formed therein for deforming the ring when said fastener is secured to said anode.
Claim 8
Dependent Claim
16 words
An X-ray tube as set forth in claim 5, wherein the ring is made from tantalum.
Claim 9
Dependent Claim
16 words
An X-ray tube as set forth in claim 5, wherein the ring is made from niobium.
Claim 10
Independent Claim
103 words
A method for securing an X-ray anode to a rotatable shaft comprising the steps: forming an axial bore through a central portion of the anode which extends into at least one enlarged coaxial recess which is formed inwardly of a first anode face; positioning a rotatable shaft through the bore and recess; placing a ductile ring within the recess; and subjecting the ring to forces causing permanent deformation of the ring until it becomes press fitted between a wall of the recess and an adjacent section of the shaft so as to secure the anode to the shaft and preventing relative motion therebetween.
Claim 11
Independent Claim
103 words
A method for securing an X-ray anode to a rotatable shaft comprising the steps: forming an axial bore through a central portion of the anode which extends into at least one enlarged coaxial recess which is formed inwardly of a first anode face; positioning a rotatable shaft through the bore and recess; placing a ductile ring within the recess; and subjecting the ring to forces causing permanent deformation of the ring until it becomes press fitted between a wall of the recess and an adjacent section of the shaft so as to secure the anode to the shaft and preventing relative motion therebetween.
Claim 12
Dependent Claim
30 words
An anode-securing method as set forth in claim 9, wherein the step of subjecting the ring to deformation forces occurs simultaneous with auxiliary fastening of the anode to the shaft.
Claim 13
Dependent Claim
50 words
The method set forth in claim 9, together with the step of heating the ring and shaft to a temperature between 1200° C. and 1600° C. for causing interdiffusion between material of the shaft and material of the ring so as to increase the adhesion between the ring and shaft.
Claim 14
Dependent Claim
34 words
The method set forth in claim 9, together with the step of forming a groove in the shaft for receiving a portion of the deformed ring thus additionally securing the anode to the shaft.
Claim 15
Dependent Claim
15 words
The method set forth in claim 11 wherein the deformation forces are maintained during heating.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |