Patents by Inventor Hari Upadhyay

Hari Upadhyay 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).

  • Reciprocating pump control system
    Patent number: 6890156
    Abstract: A pumpjack speed control system includes a user interface, a controller and a variable speed drive. The user interface includes a mathematical representation of the pumpjack geometry which permits the conversion of rod speed profiles to crank speed profiles.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: May 10, 2005
    Assignee: Polyphase Engineered Controls
    Inventors: Jeff Watson, Ramesh Aggarwal, Hari Upadhyay
  • Reciprocating pump control system
    Publication number: 20040084179
    Abstract: A pumpjack speed control system includes a user interface, a controller and a variable speed drive. The user interface includes a mathematical representation of the pumpjack geometry which permits the conversion of rod speed profiles to crank speed profiles.
    Type: Application
    Filed: November 1, 2002
    Publication date: May 6, 2004
    Inventors: Jeff Watson, Ramesh Aggarwal, Hari Upadhyay