Patents by Inventor Franz Salm

Franz Salm 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).

  • Reversible cutting bit
    Patent number: 4607988
    Abstract: A reversible cutting bit has, in a view of the bit plane, cutting projections which are at an angle of approximately 90.degree. to one another, so that the basic shape of the reversible cutting bit is angular. In order to obtain reversible symmetry, the cutting bit is constructed in fold-symmetrical manner to a fold axis located in the angle bisector between the projections, so that the in each case not used cutting edge is located on the bottom of the cutting bit.
    Type: Grant
    Filed: December 5, 1984
    Date of Patent: August 26, 1986
    Assignee: Herrli AG
    Inventors: Franz Salm, Eduard Zangerle, Jean-Fracois Muriset