Patents by Inventor Jan Winkel

Jan Winkel 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: 4793558
    Abstract: A device for disseminating spreadable material, such as fertilizer pellets or powders, consisting substantially of a frame (1) that is pulled or carried, a storage holder (3) for that material, a dosage mechanism (4) fitted beneath the holder (3) and a reciprocally driven spreading pipe (12) connected to the mechanism (4) wherein on either side of the vertical longitudinal plane the spreader pipe (12) is provided with a surface for instance formed by a longitudinal rib (22) guiding the spreadable material, said surface enclosing an angle .alpha. with the vertical and extending at least over a part of or over the whole length of the pipe (12) so obtaining an even spread of the material and in particular a symmetrical spreading pattern.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: December 27, 1988
    Assignee: Multinoru B.V.
    Inventors: Jan Winkel, Gerrit J. Lamfers
  • Patent number: 4688377
    Abstract: In an apparatus for farming vegetation lying on the ground, comprising a central frame, two first carrying arms that are pivotably mounted at the opposite sides of the frame and two second carrying arms that are pivotably mounted at the ends of the first carrying arms. Each second carrying arm is mechanically connected with the frame in such a way that pivoting the first carrying arm automatically leads to pivoting the second carrying arms. For this purpose a coupling bar can be provided between the central frame and each second carrying arm.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: August 25, 1987
    Assignee: Multinorm B.V.
    Inventors: Jan Winkel, Hermanus H. Vissers
  • Patent number: 4329837
    Abstract: An agricultural implement for raking or spreading crop lying on the field, for example, mown grass, comprising at least one carrier rotatably driven around an upright axis and having upright shaft pins arranged in a circle, on each of which is journalled in a freely pivotable manner a crop-engaging, tine-shaped element of non-circular cross section, wherein a flexible member independently of each element is arranged so that the tine-shaped element is held in an outwardly directed position with respect to the upright axis, said tine-shaped elements preferably consisting of two or more tines in overlying position the bending resistance in the vertical plane of the superjacent tines differs from that of the lower-tine.
    Type: Grant
    Filed: August 8, 1979
    Date of Patent: May 18, 1982
    Assignee: Expert N.V.
    Inventors: Hermanus H. Vissers, Jan Winkel
  • Patent number: D782913
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: April 4, 2017
    Assignee: Bruni Glass, S.p.A.
    Inventor: Jan Winkels