Patents by Inventor David Lyle Wehrs

David Lyle Wehrs 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).

  • Detection of position of a plunger in a well
    Patent number: 9534491
    Abstract: A system for detecting when a plunger reaches a bottom of a well includes a pressure sensor configured to measure a pressure of the well and provide a measured pressure output. Derivative calculation circuitry calculates a derivative of the measured pressure output. Detection circuitry detects when the plunger reaches the bottom of the well based upon the calculated derivative.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: January 3, 2017
    Assignee: Rosemount Inc.
    Inventors: John Philip Miller, David Lyle Wehrs
  • Detection of Position of a Plunger in a Well
    Publication number: 20150090445
    Abstract: A system for detecting when a plunger reaches a bottom of a well includes a pressure sensor configured to measure a pressure of the well and provide a measured pressure output. Derivative calculation circuitry calculates a derivative of the measured pressure output. Detection circuitry detects when the plunger reaches the bottom of the well based upon the calculated derivative.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 2, 2015
    Inventors: John Philip Miller, David Lyle Wehrs