Patents by Inventor Douglas P. Rauen

Douglas P. Rauen 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).

  • Method and apparatus for extracting selected materials
    Patent number: 5299693
    Abstract: An apparatus for removing recyclable or other selected items from a load of mixed trash. An identifier generating a non-visual identifying signal is secured to the item and is used in conjunction with sensor devices to locate the position of the item anywhere within the load of mixed trash, to control the movement of the load along a conveyor to an extracting device, to control the movement of the extracting device and the operation of the extracting device so as to remove the selected item from the load without human intervention and under automated control.
    Type: Grant
    Filed: August 11, 1992
    Date of Patent: April 5, 1994
    Inventors: Richard A. Ubaldi, Garrett A. Smith, Mark W. Hrehovcik, Douglas P. Rauen