Patents by Inventor Josef Ujvary

Josef Ujvary has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4247779
    Abstract: Film drive mechanism for use with a panoramic X-ray machine which provides continuous and discontinuous radiographic images of dental arch areas of a shifting patient. The mechanism utilizes electromagnetic clutches, linkage structures and cams for varying the rotational speed of a film drive shaft in accordance with the mode of radiographing selected, i.e., continuous or discontinuous. The film drive shaft controls rotation of a drum which has the film wrapped therearound.
    Type: Grant
    Filed: March 29, 1979
    Date of Patent: January 27, 1981
    Assignee: Pennwalt Corporation
    Inventors: Anthony Ciavattoni, Jack Flynn, Josef Ujvary
  • Patent number: 4168633
    Abstract: Excursion mechanism for rotating a large rotating disc member having a column upstanding therefrom at an outer portion thereof, the column being permanently affixed thereto. The column supports an X-ray source and camera for radiographing a patient's dental arch area. The column circularly orbits about the patient seated in a patient chair which rests on a stationary platform disposed above the large rotating disc member. A sprocket is rotatably mounted on the rotating disc member. A belt articulates between the sprocket and the stationary patient platform such that rotation of the sprocket through external motor means causes the large rotating disc member and column to orbit the patient.
    Type: Grant
    Filed: December 1, 1977
    Date of Patent: September 25, 1979
    Assignee: Pennwalt Corporation
    Inventors: Anthony Ciavattoni, Josef Ujvary, Robert H. Cushman
  • Patent number: 4125774
    Abstract: A dental X-ray machine for providing both continuous and discontinuous radiographic images of a patient's dental arch area. Continuous images are obtained when an X-ray source-camera assembly orbits a patient in one direction while the patient is transported in a substantially semicircular pattern in the opposite direction. The pattern is achieved through improved X-Y drive mechanism which rotates a crank assembly having a pair of depending roller guides, one of which roller guides engages guideway means affixed to a plate which is capable of traveling in an X-direction only, and the other roller guide engaging similar guideway means affixed to another plate which is capable of traveling in a Y direction only. The combined motion of the plates, upon rotation of the crank assembly produces an X-Y pattern resembling a semicircle.
    Type: Grant
    Filed: December 1, 1977
    Date of Patent: November 14, 1978
    Assignee: Pennwalt Corporation
    Inventors: Anthony Ciavattoni, Josef Ujvary, John M. Gardella