Patents by Inventor Diane Cayford

Diane Cayford 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).

  • REVERSE TORQUE DRIVE SYSTEM
    Publication number: 20110265999
    Abstract: A reverse torque drive system for a wellhead has a hydraulic pump having an inlet and an outlet, and a hydraulic motor having a first port and a second port. There is a valve body having a first position that connects the outlet of the hydraulic motor to the first port and the second port to the inlet, and a second position that connects the outlet to the second port and the first port to the inlet. One or more sensors are connected to measure a condition, and a controller moves the valve body from the first position to the second position upon the sensor sensing a predetermined condition.
    Type: Application
    Filed: April 30, 2010
    Publication date: November 3, 2011
    Applicant: AMIK OILFIELD EQUIPMENT & RENTALS LTD.
    Inventors: Bill Cayford, Diane Cayford