Patents by Inventor Henry A. Heer

Henry A. Heer 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).

  • Gate valve
    Patent number: 6089530
    Abstract: A swing gate valve for closing a lateral discharge opening in an elongated conduit includes a swing gate shaped to fit around the exterior of the conduit in an open position adjacent the lateral opening. A pair of pivotable swing arms are connected to the swing gate on opposite sides of the conduit, and are operated by an air ram to swing the gate to move it to a closed position over the discharge opening to an open position.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: July 18, 2000
    Inventor: Henry A. Heer