Patents by Inventor Crister K. G. Stark

Crister K. G. Stark 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).

  • Patent number: 4905771
    Abstract: A suspension unit in agricultural rollers, for elastically connecting the frame of the roller to a roller set including a shaft and a plurality of roller rings. An outer axially extending housing (4) is connected to the frame (2) of the roller (1) with the aid of an attachment (3). An inner mounting (5) carries the end of the roller set shaft. On either side of the inner mounting (5) there are axialy arranged horizontal abutments (6), of elastic material, e.g. rubber, connecting the housing (4) to the mounting (5). Through openings (7, 8) are formed at the upper side (7) and under side (8) of the inner mounting. There is thus obtained low stiffness vertically, and the inner mounting (5) is allowed large movement vertically, whereby the roller set is given great adaptability to ground irregularities. By having large stiffness in the horizontal direction, the roller set is only allowed small movement in the travelling direction of the roller.
    Type: Grant
    Filed: April 19, 1989
    Date of Patent: March 6, 1990
    Inventor: Crister K. G. Stark
  • Patent number: 4896732
    Abstract: An agricultural roller has two or more pivotably connected sections arranged side by side. A central frame has a towing bar pivotably connected to the central frame. The roller has roller sections (4, 6) on either side of the central frame (8) and transport wheels (15, 16), which are settable between an inactive position above the ground in the work position of the roller and a transport position where the roller means are lifted up from the ground and swung towards each other to achieve a small transport width. The two side sections (4, 6) situated closest the central frame (8) carry the transport wheels connected to the section frames, and between the sections there are pivot joints (17, 18) implemented such that the sections can adjust themselves to irregularities in the ground in the working position of the roller. A hydraulic cylinder (21) is arranged between the towing bar (2) and central frame (8), and can swing the central frame and the roller sections (4, 5, 6) connected thereto about 90.degree.
    Type: Grant
    Filed: April 19, 1989
    Date of Patent: January 30, 1990
    Inventor: Crister K. G. Stark