Patents by Inventor Yan Kuhn de Chizzelle

Yan Kuhn de Chizzelle 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).

  • Method and a system for early detection of defects in multiplex positive displacement pumps
    Patent number: 5720598
    Abstract: A method and a system for the early detection of defects in at least one multiplex pump, which includes a plurality of cylinders or chambers, by determination and analysis of pump harmonics based upon pressure fluctuations in a line in fluid communication with the multiplex pump and multiplex pump frequency. The presence of a defect, the type defect, and specific pump unit having the defect, is determined.
    Type: Grant
    Filed: October 4, 1995
    Date of Patent: February 24, 1998
    Assignee: Dowell, a division of Schlumberger Technology Corp.
    Inventor: Yan Kuhn de Chizzelle