Patents by Inventor Ulf S. Thorstensson

Ulf S. Thorstensson 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: 5516044
    Abstract: A drop nozzle system on an agricultural vehicle such as a sprayer unit includes a plurality of mounting plates attached in a spaced manner to a trailing boom structure. A plurality of drop nozzle assemblies each coupled by suitable hosing to the nozzle bodies on an agricultural spray boom are adapted for secure attachment to the mounting plates. With the mounting plates attached to the boom structure at predetermined, standard row spacings such as 30", 34", 36", 38", etc., the drop nozzle assemblies may be attached to the appropriately spaced mounting plates as determined by the inter-row spacing of the field to be sprayed. Attachment of each nozzle assembly to a respective mounting plate employs a quick disconnect coupling arrangement which facilitates re-configuring the drop nozzle system for various inter-row spacings.
    Type: Grant
    Filed: June 22, 1994
    Date of Patent: May 14, 1996
    Assignee: Hardi, Inc.
    Inventor: Ulf S. Thorstensson
  • Patent number: 5375767
    Abstract: A cushion suspension system for coupling an agricultural tool to a vehicle includes a flexible frame which permits vertical movement of the tool relative to the vehicle while maintaining the tool laterally fixed relative to the vehicle to prevent side-by-side oscillation. The flexible frame includes an air spring with an air filled bellows for providing vertical cushioning and a restoring force as the wheels of the vehicle encounter irregularities in the ground. Pressure within the air spring is adjustable to accommodate a range of agricultural tool sizes. The frame further includes a shock absorber for dampening vertical oscillation of the frame, with stops provided for limiting upward and downward displacement of the tool. The suspension system is particularly adapted for attaching an agricultural boom having a plurality of nozzles to a trailer-type sprayer.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: December 27, 1994
    Assignee: Hardi Inc
    Inventor: Ulf S. Thorstensson