Patents by Inventor Jeffrey Bertelsen

Jeffrey Bertelsen 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).

  • Publication number: 20070261893
    Abstract: A power slip that utilizes modified SDXL slips and regular drilling bowls that fits to the pin drive master bushings of the rotary table and utilizes the depth of the drive pin holes as part of the actuators, thus allowing the power slip to set lower for added clearance and safety during drilling operations. Cables are anchored to a base plate and slip linkages and slip connectors are pivotally mounted to the slips and to the top plate so that, when the lift cylinders are actuated, the slips are moved to the released position. This two-stage linkage and cable design maximizes the movement of the slip assemblies with minimum vertical movement of the power slip's housing.
    Type: Application
    Filed: April 29, 2006
    Publication date: November 15, 2007
    Inventors: Frank Campisi, Jeffrey Bertelsen
  • Patent number: D365978
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: January 9, 1996
    Assignee: TUMI
    Inventors: Richard J. Rekuc, Jeffrey Bertelsen