Patents by Inventor John R. Vennerholm

John R. Vennerholm 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).

  • Apparatus and method for flushing a casting
    Patent number: 5195276
    Abstract: An apparatus for flushing a workpiece including a passageway having an inlet and an outlet, the apparatus comprising structure adapted to communicate with the inlet and with the outlet for circulating only a fluid through a fluid flow loop including the workpiece passageway, and structure located downstream of the outlet and upstream of the inlet for removing from the fluid substantially all relatively large particles flushed from the passageway and for allowing relatively small particles flushed from the passageway to remain in the fluid so that the relatively small particles are recirculated through the passageway to act as the sole cleaning medium other than the fluid.
    Type: Grant
    Filed: February 15, 1991
    Date of Patent: March 23, 1993
    Assignee: Outboard Marine Corporation
    Inventor: John R. Vennerholm