Patents Assigned to Albert Hoffmann GmbH
  • Apparatus for comminuting sheet metal or similar material
    Patent number: 5950940
    Abstract: Apparatus for comminuting sheet metal or similar material, includes a striking tool rotatably supported about an axis; and an enveloping deck in the form of a grate assembly having holes formed therein or an abrasive plate assembly having depressions formed therein, with the enveloping deck interacting with the striking tool for crushing a material. The holes or the depressions are so arranged as to define a web structure which at least in direction of the axis has a pattern that deviates from a straight line.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: September 14, 1999
    Assignee: Albert Hoffmann GmbH
    Inventors: Erhard Hoof, Frank Hoof