Patents by Inventor Erwin Schill

Erwin Schill 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).

  • Method of drawing-in or flattening dents in sheet metal
    Patent number: 3959619
    Abstract: One side of a source of electrical energy is connected to a dented metal sheet and a hammer electrode connected to the other side of the source is successively brought into instantaneous contact with a multiplicity of locations spaced apart over the dent. The sheet is electrically heated at the location so that stresses in the sheet are relieved, thereby relaxing the sheet and flattening the dent. The electrode is generally L-shaped and has a pointed copper tip surrounded by a safety sleeve with only the point of the tip projecting from the sleeve.
    Type: Grant
    Filed: March 27, 1974
    Date of Patent: May 25, 1976
    Inventor: Erwin Schill