Patents by Inventor David W. Hermansen

David W. Hermansen 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: 7562681
    Abstract: Sandbags are filled with sand with a minimum of manual lifting. A truck has a sandbag filling unit thereon with a large sand hopper. The sand hopper has a sand holding tank underneath with one or more funnels for feeding the sand to sand blowers underneath. One or more compressors drive the sand into one or more hoses that are used to feed the sand into empty sandbags on a first conveyor located in close proximity so that workers can use the hoses to fill empty sandbags thereon. When the filled sandbags reach the end of the first conveyor, other workers would seal the bags. As the filled and sealed bags reach the end of the first conveyor, a second conveyor may be positioned to load the sandbags onto a transporting device or a pallet. One or more large sandbags are dropped into a breach of a levee.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: July 21, 2009
    Inventor: David W. Hermansen