US3806731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for taking a continuous x-ray picture of the dental arch
Assignee: J Morita Manufaturing Corp
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Filing: 1972-03-20
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Granted: 1974-04-23
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Expires: 1992-03-20
Abstract
Abstract An apparatus for taking a continuous X-ray picture of the dental arch, wherein the X-ray tube and the film are moved together in such a manner that the line connecting them crosses an ellipse approximating the dental arch of each individual patient to be photographed, always making a right angle with a line tangent to the ellipse, without disturbing the relative position of the Xray tube and the film.
Inventors
- 👤 K Kataoka
- 👤 Y Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:30
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/50; A61B6/51
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
219 words
An apparatus for taking a continuous X-ray picture of the dental arch, comprising: a base, first and second pins fixed on said base at a distance apart from each other; an elongated support member for supporting an X-ray tube and an X-ray film at the opposite ends thereof, respectively, and having a first slot formed intermediate the length thereof, a third pin fixed on said support member; a first arm pivoted to said support member by said third pin and havIng at one end thereof a second slot in which said first pin slidably engages; a second arm having one end pivoted to the opposite end of said first arm; a third slot formed in said base in coincidence with a straight line connecting said first and second pins; a fourth pin fixed on the opposite end of said second arm and engaging in both said first and third slots; sprockets on the first, second and third pins; and a loop member endlessly passing about the sprockets and adapted to be driven so as to drive said third pin along the locus of an ellipse; said dental arch being operatively disposed intermediate said X-ray tube and film with the major axis of an ellipse approximating said dental arch coinciding with the straight line connecting said first and second pins.
Claim 2
Independent Claim
219 words
An apparatus for taking a continuous X-ray picture of the dental arch, comprising: a base, first and second pins fixed on said base at a distance apart from each other; an elongated support member for supporting an X-ray tube and an X-ray film at the opposite ends thereof, respectively, and having a first slot formed intermediate the length thereof, a third pin fixed on said support member; a first arm pivoted to said support member by said third pin and havIng at one end thereof a second slot in which said first pin slidably engages; a second arm having one end pivoted to the opposite end of said first arm; a third slot formed in said base in coincidence with a straight line connecting said first and second pins; a fourth pin fixed on the opposite end of said second arm and engaging in both said first and third slots; sprockets on the first, second and third pins; and a loop member endlessly passing about the sprockets and adapted to be driven so as to drive said third pin along the locus of an ellipse; said dental arch being operatively disposed intermediate said X-ray tube and film with the major axis of an ellipse approximating said dental arch coinciding with the straight line connecting said first and second pins.
Claim 3
Dependent Claim
118 words
In apparatus for recording a continuous X-ray picture of the dental arch, a fixed reference, a relatively rotatable drive member which is cam connected with the reference and equipped with an X-ray source and an X-ray film holder on opposite sides of the cam connection therebetween, a relatively articulated linkage cam connected with the reference and with the drive member at the cam connection between the drive member and the reference, means forming a pivotal connection between the linkage and the drive member, and drive means operable to cause the pivotal connection between the linkage and the drive member to move through an elliptical path, and thereby cause the source and the holder to trace coaxial elliptical paths.
Claim 4
Dependent Claim
118 words
In apparatus for recording a continuous X-ray picture of the dental arch, a fixed reference, a relatively rotatable drive member which is cam connected with the reference and equipped with an X-ray source and an X-ray film holder on opposite sides of the cam connection therebetween, a relatively articulated linkage cam connected with the reference and with the drive member at the cam connection between the drive member and the reference, means forming a pivotal connection between the linkage and the drive member, and drive means operable to cause the pivotal connection between the linkage and the drive member to move through an elliptical path, and thereby cause the source and the holder to trace coaxial elliptical paths.
Claim 5
Dependent Claim
51 words
The apparatus according to claim 2 wherein the drive means includes a power unit and a system of rotary members on the reference and the pivotal connection between the linkage and the drive member, interconnected with one another and with the power unit to be driven in unison by the unit.
Claim 6
Dependent Claim
134 words
In apparatus for recording a continuous X-ray picture of the dental arch, a fixed reference, a relatively rotatable drive member which is cam connected with the reference and equipped with an X-ray source and an X-ray film holder on opposite sides of the cam connection therebetween, a pair of relatively articulated links, one of which is cam connected with the reference, and the othe of which is cam connected with the drive member at the cam connection between the drive member and the reference, means forming a pivotal connection between the one link and the drive member, and drive means operable to cause the pivotal connection between the one link and the drive member to move through an elliptical path, and thereby to cause the source and the holder to trace coaxial elliptical paths.
Claim 7
Dependent Claim
134 words
In apparatus for recording a continuous X-ray picture of the dental arch, a fixed reference, a relatively rotatable drive member which is cam connected with the reference and equipped with an X-ray source and an X-ray film holder on opposite sides of the cam connection therebetween, a pair of relatively articulated links, one of which is cam connected with the reference, and the othe of which is cam connected with the drive member at the cam connection between the drive member and the reference, means forming a pivotal connection between the one link and the drive member, and drive means operable to cause the pivotal connection between the one link and the drive member to move through an elliptical path, and thereby to cause the source and the holder to trace coaxial elliptical paths.
Claim 8
Dependent Claim
123 words
The apparatus according to claim 4 wherein the drive means includes a power unit on the drive member, a rotary member on the pivotal connection between the one link and the drive member, driven by the power unit, a pair of spaced rotary members on the reference, one of which is coaxial with the cam connection between the one link and the reference, and a rotary connection between the rotary member on the pivotal connection between the one link and the drive member, and each of the rotary members on the reference, whereby the rotary member on the pivotal connection between the one link and the drive member is caused to trace an elliptical path as it is driven by the power unit.
Claim 9
Dependent Claim
23 words
The apparatus according to claim 5 wherein the rotary connection takes the form of a flexible band interengaged about the respective rotary members.
Claim 10
Dependent Claim
34 words
The apparatus according to claim 6 wherein the reference has an arcuate guide thereon, and there are yieldable biasing means interposed between the guide and the drive member to maintain tension in the band.
Claim 11
Dependent Claim
18 words
The apparatus according to claim 4 wherein the cam connections taken the form of pin and slot connections.
Claim 12
Dependent Claim
108 words
In combination, a fixed reference, a relatively rotatable drive member which is cam connected with the reference and equipped with an X-ray source and an X-ray film holder on opposite sides of the cam connection therebetween, a relatively Articulated linkage cam connected with the reference and with the drive member at the cam connection between the drive member and the reference, means forming a pivotal connection between the linkage and the drive member, and drive means operable to cause the pivotal connection between the linkage and the drive member to move through an elliptical path, and thereby cause the source and the holder to trace coaxial elliptical paths.
Claim 13
Dependent Claim
108 words
In combination, a fixed reference, a relatively rotatable drive member which is cam connected with the reference and equipped with an X-ray source and an X-ray film holder on opposite sides of the cam connection therebetween, a relatively Articulated linkage cam connected with the reference and with the drive member at the cam connection between the drive member and the reference, means forming a pivotal connection between the linkage and the drive member, and drive means operable to cause the pivotal connection between the linkage and the drive member to move through an elliptical path, and thereby cause the source and the holder to trace coaxial elliptical paths.
References Cited (Backward Citations)
US3536913A
Cited
US3636349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-22 | 1977-10-22 | 1978-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-22 | 1981-10-22 | 1982-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-22 | 1985-10-22 | 1986-04-23 | $7700.00 | Window Closed / Lapsed |