Patents by Inventor Douglas A. Puariea

Douglas A. Puariea 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).

  • Rail car door linkage
    Patent number: 4266486
    Abstract: A door linkage for a side dump railroad car operable to automatically lower the door on the low side of the car when the car body is tilted to dump its contents thereof.
    Type: Grant
    Filed: August 30, 1979
    Date of Patent: May 12, 1981
    Assignee: The Maxson Corporation
    Inventor: Douglas A. Puariea
  • Side dumping railroad car
    Patent number: 4240355
    Abstract: A side dump rail car tilted by means of hydraulic cylinders at each end of the car which are centrally located. The edge of the car is retained by an engagement lug slid into place hydraulically to determine direction of tilt.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: December 23, 1980
    Assignee: The Maxson Corporation
    Inventor: Douglas A. Puariea
  • Articulated schnabel Car
    Patent number: 4160420
    Abstract: A schnabel-type railroad car adapted to carry very large loads incorporating articulated end units having a massive hinge at a reduced pivot location so that the weight of the car can be carried at a central location on the trucks while still pivoting about a lesser radius to help negotiate tight turns. Special hydraulic systems permit the car to be raised and lowered and also shifted laterally to provide additional roadbed clearance.
    Type: Grant
    Filed: September 8, 1977
    Date of Patent: July 10, 1979
    Assignee: The Maxson Corporation
    Inventors: Richard W. Hackbarth, Douglas A. Puariea, Philip J. Kramlinger
  • Railway flat car hand brake system
    Patent number: 4102212
    Abstract: A flat car hand brake system in which a vertical wheel, high powered hand brake is positioned horizontally below the deck to provide load clearance. An adjustable chain takeup system moves the idle portion of the brake chain at exactly the same rate as the loaded or pulled portion of the chain to prevent any slack which would cause fouling.
    Type: Grant
    Filed: December 6, 1976
    Date of Patent: July 25, 1978
    Assignee: The Maxson Corporation
    Inventors: Richard W. Hackbarth, Douglas A. Puariea