Patents Assigned to P. J. Zweegers end Zonen Landbouwmachinefabriek B.V.
  • Ground working implement
    Patent number: 4091878
    Abstract: An agricultural implement for pulverizing the top layer of the soil. It comprises a positively coupled pair of rollers rolling over the ground at unequal surface speeds so that at least one of the rollers is constantly slipping. A harrow is mounted in front of each roller. The assembly of rollers and harrows is pressed onto the ground by a rod comprising a built-in compression spring, which may be adjustable. Each roller is composed of a set of longitudinal strips mounted on an axle.
    Type: Grant
    Filed: January 30, 1976
    Date of Patent: May 30, 1978
    Assignee: P. J. Zweegers end Zonen Landbouwmachinefabriek B.V.
    Inventor: Cornelius Jan Steketee