Patents by Inventor Franciscus J. G. M. Oostendoys

Franciscus J. G. M. Oostendoys 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).

  • Flow straightener for a turbine-wheel gasmeter
    Patent number: 5596152
    Abstract: Flow straightener for eliminating vortices in a gas stream through a flow tube. The flow straightener consists of a plate with a circular symmetric hole pattern, wherein the diameter of the holes is smaller than 0.1 times the diameter of the flow tube. The passage area of the holes is between 0.4 and 0.8 times the passage area of the flow tube. The diameter of the largest hole is bigger than 1.3 times the diameter of the smallest hole. The thickness of the plate is between 0.8 and 1 times the square root of the average passage area of the holes. The plate is disposed upstream in front of a turbine-wheel gas meter, which is mounted, so as to run on bearings, on a cylindrical body. In the annular gap between the cylindrical body and the flow tube, a second flow straightener is arranged consisting of a number of vanes, the ratio of the height of the vanes and the spacing between the vanes being between 0.8 and 1.
    Type: Grant
    Filed: April 14, 1995
    Date of Patent: January 21, 1997
    Assignee: Instromet B.V.
    Inventors: Josephus T. M. Bergervoet, Franciscus J. G. M. Oostendoys