Patents by Inventor Robert Eric Maki

Robert Eric Maki 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).

  • Valve stem assembly for rotary valve and method
    Patent number: 8490949
    Abstract: A valve body defines a valve stem opening. A valve stem comprises an enlarged portion greater than the valve stem opening to thereby secure the valve stem within the valve body by limiting radially outward movement of the valve stem with respect to the valve body. A rotary member comprise upper and lower bosses. Upper and lower split trunnions, with split components that can be inserted from opposite sides of the valve body, are used to rotationally support the upper and lower bosses to permit rotation of the rotary member while preventing axial movement of the axial flow path of the valve.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: July 23, 2013
    Assignee: Worldwide Oilfield Machine, Inc.
    Inventors: William W. Lanning, Robert Eric Maki
  • VALVE STEM ASSEMBLY FOR ROTARY VALVE AND METHOD
    Publication number: 20110240898
    Abstract: A valve body defines a valve stem opening. A valve stem comprises an enlarged portion greater than the valve stem opening to thereby secure the valve stem within the valve body by limiting radially outward movement of the valve stem with respect to the valve body. A rotary member comprise upper and lower bosses. Upper and lower split trunnions, with split components that can be inserted from opposite sides of the valve body, are used to rotationally support the upper and lower bosses to permit rotation of the rotary member while preventing axial movement of the axial flow path of the valve.
    Type: Application
    Filed: July 13, 2010
    Publication date: October 6, 2011
    Inventors: W.W. Lanning, Robert Eric Maki