Patents by Inventor Theodorus Antonius Douven

Theodorus Antonius Douven 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).

  • Spray nozzle, and also spray boom provided therewith
    Patent number: 6196473
    Abstract: Spray nozzle for a spray boom to be fixed to a crop protection machine or the like. The spray nozzle is fixed on a supply line for spraying a fluid. The spray nozzle consists of a spray nozzle holder and a spray nozzle head. The passage of the inflow aperture to the outflow channel is regulated by means of an electromagnetic coil. Each spray nozzle holder can be controlled individually in a very accurate manner by means of such an electromagnetic shut-off valve situated in the spray nozzle holder. Connection between electric coil and spray nozzle holder is achieved by means of a connecting piece.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: March 6, 2001
    Assignee: Machinefabriek Gebr. Douven B.V.
    Inventors: Joseph Marie Henrie Beeren, Theodorus Antonius Douven