Patents by Inventor Gunnar K. Lofgren

Gunnar K. Lofgren 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: 4780817
    Abstract: A method for providing destination and vehicle function information to an AGV comprises the steps of providing one or more stationary dynamically codeable passage transducers (5) at predetermined spaced-apart points along an AGV path (220). The AGV path (220) is provided with a separate guidance wire (W1, W2, W3) or other guidance system. Each of the transducers (5) has a digital readable instruction set representing instructions to the vehicle. A transducer reader is provided on each AGV (200) for reading the instruction set of each transducer (5) as the AGV (200) proceeds along path 220 past the transducer (5) in reading relation. The instructions read are interfaced with the control system of the AGV (200) to provide a predetermined AGV (200) response.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: October 25, 1988
    Assignee: NDC Technologies, Inc.
    Inventor: Gunnar K. Lofgren
  • Patent number: 4626995
    Abstract: An optical guidance system for remotely controlled, self-propelled vehicles in which a single light source is used as an aiming point by the vehicle. The light source is detected by a camera lens and the vehicle is maneuvered according to the position of the light within the field of view of the lens. A computer is provided to determine the cartesian coordinates of the light source and calculate the position of the vehicle relative to the light source. The light source also transmits optically coded information for controlling the vehicle relative to the position of other vehicles, the condition of the vehicle path or other related information.
    Type: Grant
    Filed: March 26, 1984
    Date of Patent: December 2, 1986
    Assignee: NDC Technologies, Inc.
    Inventors: Gunnar K. Lofgren, Goran P. R. Netzler