Patents by Inventor Koorn, Maarten

Koorn, Maarten 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: 4860527
    Abstract: A mowing machine comprising at least three mower members which are arranged rotatably about substantially vertical axes on a supporting beam containing drive means. The drive means includes a rotating torsion shaft which is driven at both ends thereof and carries gears for driving the mower members.
    Type: Grant
    Filed: November 12, 1987
    Date of Patent: August 29, 1989
    Assignee: C. van der Lely, N.V.
    Inventor: Koorn Maarten
  • Patent number: 4838013
    Abstract: A mowing machine having a mobile frame, made up of a portion including the mower units and a support frame, which can be coupled by means of a pivotal arm to a prime mover. During operation, the mobile frame is located behind and offset to one side of the prime mover. The pivotal arm carries drive means for driving the mowing machine through the PTO-shaft of the prime mover. The pivotal arm is constructed so that it may pivot over a broad range of angles thereby facilitating turns. To accomodate the construction of the pivotable arm, the drive means may be divided into three sections interconnected by two universal joints.
    Type: Grant
    Filed: November 10, 1987
    Date of Patent: June 13, 1989
    Assignee: C. van der Lely, N.V.
    Inventors: Louet Feisser, Arnold, Koorn, Maarten, Sape Sikkema