Patent US3867636A successfully refreshed from Google Patents.
US3867636A
Expired / Lapsed
US
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Apparatus for taking a continuous x-ray picture of the dental arch
Assignee: J Morita Manufaturing Corp
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Filing: 1974-03-15
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Granted: 1975-02-18
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Expires: 1994-03-15
Abstract
Abstract Apparatus for taking a continuous X-ray picture of the dental arch wherein an X-ray tube and a film holder are held in a spaced apart relation and moved about a patient''s jaws along an elliptical arc. As the film holder is moved, it is automatically rotated about its own axis so that unexposed portions of the film on the outer lateral circumferential surface of the film holder are successively caused to face the X-ray tube.
Inventors
- 👤 Masato Miyahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:48
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/50; A61B6/51
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
180 words
In apparatus for recording a continuous X-ray picture of the dental arch, a fixed base, a drive member which is mounted to rotate opposite the base, and which is equipped with an X-ray source and an X-ray film holder on opposite sides of the rotational axis thereof, means operable to rotate the drive member, means operable during the rotation of the drive member to cause the rotational axis of the drive member to shift in relation to the base such that the source and the holder trace coaxial elliptical arcs, a fixed reference, and a pair of pivotally interconnected links, a first of which is pivotally connected with the drive member, and the second of which is cam connected with the reference, said film holder being rotatably mounted on the drive member, and there being a cam fixed on one of the links, and means on the drive member yieldably biasing the cam into engagement with the film holder so that on rotation of the drive member, the film holder is caused to rotate in relation to the X-ray source.
Claim 2
Dependent Claim
180 words
In apparatus for recording a continuous X-ray picture of the dental arch, a fixed base, a drive member which is mounted to rotate opposite the base, and which is equipped with an X-ray source and an X-ray film holder on opposite sides of the rotational axis thereof, means operable to rotate the drive member, means operable during the rotation of the drive member to cause the rotational axis of the drive member to shift in relation to the base such that the source and the holder trace coaxial elliptical arcs, a fixed reference, and a pair of pivotally interconnected links, a first of which is pivotally connected with the drive member, and the second of which is cam connected with the reference, said film holder being rotatably mounted on the drive member, and there being a cam fixed on one of the links, and means on the drive member yieldably biasing the cam into engagement with the film holder so that on rotation of the drive member, the film holder is caused to rotate in relation to the X-ray source.
Claim 3
Dependent Claim
27 words
The apparatus according to claim 1 wherein the reference is disposed on the major axis of the ellipse coinciding with the arc traced by the film holder.
Claim 4
Dependent Claim
26 words
The apparatus according to claim 2 wherein the cam connection between the second link and the reference takes the form of a pin and slot connection.
Claim 5
Dependent Claim
30 words
The apparatus according to claim 1 wherein the drive member takes the form of an elongated arm, and the means for shifting the axis of the same include an ellipsograph.
Claim 6
Dependent Claim
28 words
The apparatus according to claim 1 wherein the primary drive member rotates in a horizontal plane, and the X-ray source and the film holder depend from the same.
Claim 7
Dependent Claim
20 words
The apparatus according to claim 1 wherein the cam is curvilinear and disposed about the pivotal connection between the links.
Claim 8
Dependent Claim
15 words
The apparatus according to claim 1 wherein the cam has a part cylindrical surface thereon.
Claim 9
Dependent Claim
17 words
The apparatus according to claim 7 wherein the surface of the cam has a concave recess therein.
Claim 10
Dependent Claim
25 words
The apparatus according to claim 1 wherein the film holder includes a cylindrical wheel, and the cam is yieldably biased into engagement with the wheel.
Claim 11
Dependent Claim
15 words
The apparatus according to claim 1 wherein the cam is disposed on the second link.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |