US3752990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray device having an anode tube with filtering means thereon
Assignee: Individual
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Filing: 1971-06-18
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Granted: 1973-08-14
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Expires: 1991-06-18
Abstract
Abstract A device for use in the production of dental X-ray photographs comprises a hollow-anode X-ray tube projecting from a housing with the tube specially mounted to absorb shocks and stresses imposed on the anode tube. The anode tube which projects from the housing is preferably shielded when not in use by a projecting tube slidable relative to the housing. The device may also include a second X-ray tube for intra-oral and extra-oral photography with this second tube emitting X-rays at 90* to the axis of the hollow anode X-ray tube. Prefiltering material may be provided on the head of the anode tube or the head of the anode tube may be specially shaped so that uniform prefiltering of the radiation from the anode tube occurs over the beam angle necessary for full-mouth photography.
Inventors
- 👤 H Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:26
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/50; A61B6/51; A61B6/512; H; H01; H01J; H01J35/00; H01J35/24; H01J35/26; H01J35/32; H05; H05G; H05G1/00; H05G1/02; H05G1/04; H05G1/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
156 words
In an X-ray device for use in producing dental X-ray radiographs, a. a tube housing; b. anode tube means projecting from said tube housing, said tube means having a longitudinal axis; c. an anode mounted in said anode tube means adjacent the end of said anode tube means opposite said tube housing, said anode, when bombarded by electrons, emitting X-rays over a beam angle that extends both radially and longitudinally of said anode tube means to produce a full-mouth radiograph when said anode tube means is correctly positioned within a patient''s mouth; the improvement d. wherein said anode tube means comprises filtering means, said filtering means having a variable thickness along the longitudinal axis of said tube means such that the X-rays pass through substantially equal thicknesses of filtering material irrespective of the emission angle relative to the longitudinal axis of said anode tube means whereby the X-rays are uniformly filtered over the entire beam angle.
Claim 2
Dependent Claim
156 words
In an X-ray device for use in producing dental X-ray radiographs, a. a tube housing; b. anode tube means projecting from said tube housing, said tube means having a longitudinal axis; c. an anode mounted in said anode tube means adjacent the end of said anode tube means opposite said tube housing, said anode, when bombarded by electrons, emitting X-rays over a beam angle that extends both radially and longitudinally of said anode tube means to produce a full-mouth radiograph when said anode tube means is correctly positioned within a patient''s mouth; the improvement d. wherein said anode tube means comprises filtering means, said filtering means having a variable thickness along the longitudinal axis of said tube means such that the X-rays pass through substantially equal thicknesses of filtering material irrespective of the emission angle relative to the longitudinal axis of said anode tube means whereby the X-rays are uniformly filtered over the entire beam angle.
Claim 3
Dependent Claim
42 words
The X-ray device as set forth in claim 1 wherein the thickness of said anode tube means varies such that all X-ray radiation emitted within said beam angle travels a path of equal length through the wall of said anode tube means.
Claim 4
Dependent Claim
74 words
The device as set forth in claim 2 wherein said filtering means comprises a first portion of filtering material of uniform thickness forming said anode tube means and a second portion of filtering material of varying thickness covering preselected areas of said first portion of filtering material wherein said second portion of filtering material provides additional filtering to said X-ray radiation such that said X-ray radiation travels equal path lengths within said filtering means.
Claim 5
Dependent Claim
78 words
The apparatus as set forth in claim 3 wherein said anode tube means comprises: a. an anode tube of cylindrical cross sectioning having walls of uniform thickness wherein said walls comprise said first portion of said filtering means; and b. an applicator tube for covering at least a portion of said anode tube means, surrounding said at least a portion of said anode tube, wherein said second portion of said filtering means is affixed to said applicator tube.
Claim 6
Dependent Claim
30 words
The device as set forth in claim 2 wherein said anode tube means comprises: a. an anode tube including said filtering means; and b. an applicator surrounding said anode tube.
Claim 7
Dependent Claim
48 words
The device as set forth in claim 2 wherein said anode tube means comprises: a. an anode tube; b. an applicator surrounding said anode tube; and c. wherein said filtering means comprises a first portion disposed of said anode tube and a second portion disposed on said applicator.
Claim 8
Dependent Claim
25 words
The apparatus as set forth in claim 1 wherein said anode tube means is formed from a ceramic based material such as a ceramic oxide.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |