Patents by Inventor Hans Andre Johan Theeuwen

Hans Andre Johan Theeuwen 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 boom with dampening device
    Patent number: 7913930
    Abstract: A spray linkage (10) for a crop sprayer includes a support (16) and a central frame (18) pivotally connected to the support (16), the central frame (18) being pivotable about an axis (32) from a neutral position. At least one hydraulic cylinder (34, 36) is fastened at one end to the support (16) and at the other end to the central frame (18). To damp the spray linkage (10) during oscillating movements, at least a first hydraulic cylinder (34, 36) has a first and a second hydraulic chamber (44, 46, 48, 50), a first hydraulic line (52, 54) is provided which discharges into the first hydraulic chamber (44, 46) and a second hydraulic line (54, 52) is provided which discharges into the second hydraulic chamber (48, 50). Restrictor structure (58, 60, 62, 64) throttles hydraulic flow from a hydraulic chamber (44, 46, 48, 50) while hydraulic flow into a hydraulic chamber (44, 46, 48, 50) is relatively unthrottled.
    Type: Grant
    Filed: November 26, 2008
    Date of Patent: March 29, 2011
    Assignee: John Deere Fabriek Horst B.V.
    Inventors: Hans Andre Johan Theeuwen, Petrus Johannes Maria Fransen, Kent Alvin Klemme
  • SPRAY BOOM WITH DAMPENING DEVICE
    Publication number: 20090173802
    Abstract: A spray linkage (10) for a crop sprayer includes a support (16) and a central frame (18) pivotally connected to the support (16), the central frame (18) being pivotable about an axis (32) from a neutral position. At least one hydraulic cylinder (34, 36) is fastened at one end to the support (16) and at the other end to the central frame (18). To damp the spray linkage (10) during oscillating movements, at least a first hydraulic cylinder (34, 36) has a first and a second hydraulic chamber (44, 46, 48, 50), a first hydraulic line (52, 54) is provided which discharges into the first hydraulic chamber (44, 46) and a second hydraulic line (54, 52) is provided which discharges into the second hydraulic chamber (48, 50). Restrictor structure (58, 60, 62, 64) throttles hydraulic flow from a hydraulic chamber (44, 46, 48, 50) while hydraulic flow into a hydraulic chamber (44, 46, 48, 50) is relatively unthrottled.
    Type: Application
    Filed: November 26, 2008
    Publication date: July 9, 2009
    Inventors: Hans Andre Johan Theeuwen, Petrus Johannes Maria Fransen, Kent Alvin Klemme