Patents Assigned to Renfert GmbH & Co.
  • Patent number: 4976073
    Abstract: An apparatus for moving a granulate material for use on dental prostheses comprises a container for the material, with at least one riser pipe which projects into the space in the container above the material therein and which is fixed to a support base connected to the container. With at least one metering nozzle which terminates in the interior of the container, the riser pipe is connected to an air feed means for carrying a flow of air for conveying the material from the container in the form of an air/material mixture. At least one closure member is disposed in the mixture discharge means of the apparatus. In the method of moving the granulate material, the material is mixed with compressed air and fed in the form of a mixed flow to the dental prosthesis to be operated on, wherein a flow of control air may be fed to the granulate material prior to mixing thereof with the compressed air for fluidization of that material with the control air.
    Type: Grant
    Filed: March 3, 1988
    Date of Patent: December 11, 1990
    Assignee: Renfert GmbH & Co.
    Inventor: Rieger Klaus-Ulfert
  • Patent number: 4846718
    Abstract: A dental prosthesis with a metal body which has an internal cavity open at one end and which is provided with a facing of plastic, ceramic or the like is to be comparatively light and is to be of adequate strength, as well as being able to be used as posts for bridge constructions.For that purpose it is proposed that the metal body is formed as a carrier element (12) from a filigree grid or lattice having meshes, and is fixedly connected to the facing which surrounds same as a casing layer (10). In addition, two carrier elements (12) formed from the grid or lattice are to be connected by at least one bar (22) and supplemented by a grid or lattice portion (23) cast thereon, to form a bridge construction (21).
    Type: Grant
    Filed: June 18, 1987
    Date of Patent: July 11, 1989
    Assignee: Renfert GmbH & Co.
    Inventor: Klaus Rieger