Patents by Inventor Wilhelm Lindfeld

Wilhelm Lindfeld 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).

  • Device for loading a fragmenting machine for example a hammer crusher
    Patent number: 6612421
    Abstract: The invention relates to a device for loading a fragmenting machine, such as a hammer crusher, including a front and rear upper drive roller which are equipped, independently of each other, with a drive mechanism and arranged above the feed plane of a feed chute. The drive rollers are mounted on a displaceable and pressure exerting system of levers, such that a continuous, pre-pressed and controlled feed of recyclable material for fragmenting is guaranteed.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: September 2, 2003
    Assignee: Metso Lindemann GmbH
    Inventors: Erich Köhl, Wilhelm Lindfeld