Patents by Inventor Cesar A. Fierro

Cesar A. Fierro 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).

  • Wear resistant plates on a leading transitional surface of the leg for a rotary cone drill bit
    Patent number: 9488007
    Abstract: A rotary cone drill bit includes: a body, a leg depending from the body, a bearing shaft extending from the leg and a cone mounted to the bearing shaft. The leg includes a leading transitional surface. A bottom surface of a hard material plate is attached to a substantially conforming surface of the leg in a position where the hard material plate is disposed on a floor surface formed in or by the leading transitional surface of the leg.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: November 8, 2016
    Assignee: VAREL INTERNATIONAL IND., L.P.
    Inventors: David Michel Harrington, Amnach Kongamnach, Cesar A. Fierro
  • WEAR RESISTANT PLATES ON A LEADING TRANSITIONAL SURFACE OF THE LEG FOR A ROTARY CONE DRILL BIT
    Publication number: 20140299384
    Abstract: In an embodiment, a rotary cone drill bit comprises: a body, a leg depending from the body, a bearing shaft extending from the leg and a cone mounted to the bearing shaft. The leg includes a leading transitional surface. A bottom surface of a hard material plate is attached to a substantially conforming surface of the leg in a position where the hard material plate is disposed on a floor surface formed in or by the leading transitional surface of the leg.
    Type: Application
    Filed: February 28, 2014
    Publication date: October 9, 2014
    Applicant: Varel International Ind., L.P.
    Inventors: David Michel Harrington, Amnach Kongamnach, Cesar A. Fierro