Patents by Inventor Walter Kracht

Walter Kracht 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: 4728292
    Abstract: A dentinal retention pin and dental tool for inserting the retention pin into the healthy dentine portion of a tooth. A cylindrical hole with a beveled top is predrilled in the tooth to receive a threaded end portion of the pin such that the threads cut into the dentine to secure the pin. A chamfered stop is positioned above the threaded portion, which seats against the beveled top of the hole to limit penetration of the pin into the tooth. The pin is dimensioned to stop before the threaded portion engages the bottom of the hole. A supra-coronal portion of the pin pertrudes above the stop and provides a surface for securely attaching a reconstructed coronal portion to the tooth. A manipulating section of the pin attaches to the supra-coronal section by a frangible link. The manipulating section comprises a cylindrical extension of the pin having a flat engagement surface in a plane approximately along the diameter of the pin.
    Type: Grant
    Filed: December 19, 1985
    Date of Patent: March 1, 1988
    Assignee: Gebr. Brasseler
    Inventors: Leopold P. Lustig, Peter Malata, Walter Kracht