Patents by Inventor David N. Ferrence

David N. Ferrence 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: 5131713
    Abstract: A vehicle for a freight transportation system has a platform with end walls located at opposite ends. A pair of doors are pivotally connected to the end walls and are pivotal upwardly between closed and open positions. The doors are held in the closed position by a latch that includes a release member projecting laterally from the door. Upward movement of the release member releases the latch and allows the doors to be moved to the open position.
    Type: Grant
    Filed: July 3, 1991
    Date of Patent: July 21, 1992
    Assignee: UTDC, Inc.
    Inventor: David N. Ferrence
  • Patent number: 5078566
    Abstract: A freight transportation system is provided and comprises a loading station, an unloading station and a vehicle moveable therebetween to transport freight. The vehicle includes a lower platform for carrying freight and a pair of doors moveable between open and closed positions. In the closed position, the doors constitute side walls to prevent removal of the freight from the vehicle. In the open position, the doors are located to facilitate removal of the freight from the vehicle. The unloading station includes a door moving mechanism for moving the doors of the vehicle to the open position upon its arrival at the station. A freight removal device moves the freight off of one side of the platform when the doors are moved to the open position.
    Type: Grant
    Filed: November 8, 1990
    Date of Patent: January 7, 1992
    Assignee: UTDC, Inc.
    Inventor: David N. Ferrence
  • Patent number: 5015141
    Abstract: A freight transportation system is provided and comprises a loading station, an unloading station and a vehicle moveable therebetween to transport freight. The vehicle includes a lower platform for carrying freight and a pair of doors moveable between open and closed positions. In the closed position, the doors constitute side walls to prevent removal of the freight from the vehicle. In the open position, the doors are located to facilitate removal of the freight from the vehicle. The unloading station includes a door moving mechanism for moving the doors of the vehicle to the open position upon its arrival at the station. A freight removal device moves the freight off of one side of the platform when the doors are moved to the open position.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: May 14, 1991
    Assignee: Utdc, Inc.
    Inventor: David N. Ferrence