Patents by Inventor Max Ragaller

Max Ragaller 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).

  • Fastening screw for assembly plates
    Patent number: 5064324
    Abstract: Threaded fasteners adapted to be preliminarily inserted in bore holes of assemblies are modified to prevent their dislodgement by placing an elastic, plastic material on the fastener shaft in an amount sufficient to protrude outwardly from the shaft far enough to frictionally engage the wall of the bore hole into which the fastener is to be inserted. In a preferred embodiment, a polyamide plastic is placed on the shaft of the fastener in the region of the threaded portion thereof.
    Type: Grant
    Filed: June 19, 1990
    Date of Patent: November 12, 1991
    Assignee: Marker Deutschland GmbH
    Inventor: Max Ragaller