Patents by Inventor Stephen L. Hirschboeck

Stephen L. Hirschboeck 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).

  • Core gripper
    Patent number: 4245861
    Abstract: A device for gripping the insides of cores of rolls of materials, and comprising a polygonal central cam, multiple gripping cylinders which are held against the cam by resilient retainer rings and a cylindrical sleeve which retains the gripping cylinders in longitudinal slots passing through the sleeve. The gripping cylinders are caused to move radially inward and outward when the sleeve is rotated relative to the cam and the cylinders are urged outward by the corners of the cam or inward by the resilient retainer rings as the cylinders move from the corners of the polygon to the sides of the polygon.
    Type: Grant
    Filed: July 30, 1979
    Date of Patent: January 20, 1981
    Inventors: Edward G. Harry, Stephen L. Hirschboeck