Patents by Inventor Ernst R. Lindberg

Ernst R. Lindberg 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 and apparatus for the reversal or replacement of hammers in hammer mills
    Patent number: 4288904
    Abstract: A method of mounting and dismounting hammers in a hammer mill in which the hammers are supported in rows on carrier bars, in which each such row of hammers is grasped, lifted and held, by means of a gripping and lifting device, in a position in which the carrier bar, on mounting of the hammers, may, in the unloaded state, be inserted in the row of hammers and connected to the rotor of the hammer mill in order thereafter to be loaded with the weight of the hammers. Moreover, on dismounting of the hammers, the carrier bar may, in the unloaded state, be withdrawn from the row of hammers which is thereafter lifted out of the hammer mill.
    Type: Grant
    Filed: March 2, 1979
    Date of Patent: September 15, 1981
    Assignee: Svedala-Arbra AB
    Inventor: Ernst R. Lindberg