Patents by Inventor Allen D. Dvorak

Allen D. Dvorak 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).

  • Multi-vane flow rate stabilizer for throttling valves
    Patent number: 5931445
    Abstract: A valve includes a fluid inlet passageway coupled to a fluid outlet passageway through an orifice and a valve plug that is moveable with respect to the orifice to vary the rate of fluid flow through the orifice. A seat ring is disposed at the orifice and includes a structural member having three vanes connected in a Y-shaped configuration extending into the fluid inlet passageway adjacent the orifice. The Y-shaped vane configuration prevents disturbances, such as intermittent vortices, from forming within the fluid in the fluid inlet passageway and, thereby, provides a stable rate of fluid flow through the valve.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: August 3, 1999
    Assignee: Fisher Controls International, Inc.
    Inventors: Allen D. Dvorak, Paul J. Schafbuch, David J. Westwater, Gerald L. Mimick
  • Flow rate stabilizer for throttling valves
    Patent number: 5765814
    Abstract: A valve includes a fluid inlet passageway coupled to a fluid outlet passageway through an orifice and a valve plug which is moveable with respect to the orifice to vary the rate of fluid flow through the orifice. A seat ring is disposed at the orifice and includes a structural member extending into the fluid inlet passageway adjacent the orifice which prevents disturbances, such as intermittent vortices, from forming within the fluid in the fluid inlet passageway and which, thereby, provides a stable rate of fluid flow through the valve. The structural member may, alternatively, be connected to the valve plug or a wall of the fluid inlet passageway.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: June 16, 1998
    Assignee: Fisher Controls International, Inc.
    Inventors: Allen D. Dvorak, Paul J. Schafbuch, David J. Westwater