The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 1987
Filed:
Jan. 31, 1985
Erkki Tammisalo, Turku, FI;
Heikki Kanerva, Turku, FI;
Jaakko Aarnio, Helsinki, FI;
Markku Wederhorn, Espoo, FI;
Kai Laner, Helsinki, FI;
Orion-Yhtyma, Helsinki, FI;
Abstract
An apparatus for panoramic X-ray photography of the area of the dentition and the jaws, comprising a frame part, a bearing part linearly movable in relation to the frame part, and a support arm attached rotatably to the bearing part, and having at one end an X-ray film and at the opposite end an X-ray source. The movements of the bearing part, the support arm and the film are synchronized in such a way that an image of an area of desired shape, e.g. the patient's dental arch, is obtained on the film. The invention provides the effect that the X-ray beam can be tilted to a desired angle in relation to the horizontal, whereby it is possible with greater sharpness to photograph, for example, teeth slanted in relation to the vertical. For this purpose, the support arm is tiltable about an axis perpendicular to its rotational axis so that, when this axis is vertical, the straight line connecting the source of radiation and the film is obligue to the horizontal. The structural parts between the bearing part and the support arm are provided with co-operating curved guide means, the mutual movement of which alters the tilt position of the support arm. The control movements are performed by stepping motors.