Patents by Inventor David W. Tandy

David W. Tandy 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).

  • Freight discharge of railway wagons
    Patent number: 4909699
    Abstract: A freight discharge assembly particularly for a unit of railway hopper wagons (10) comprising an endless conveyor (30) arranged to run under the hoppers to receive material falling from the hoppers under gravity, a drive drum (36) at each end of the unit for selectively driving the endless belt in either direction each drive drum being mounted on arms (38) pivotally mounted on the unit whereby each loop of the endless belt around each drum (36) can be moved away from the unit.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: March 20, 1990
    Assignee: The Standard Railway Wagon Company Limited
    Inventors: David W. Tandy, Geoffrey Laycock