Patents by Inventor DAVID WICKSTRÖM

DAVID WICKSTRÖM 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).

  • Drill rod or adaptor with strengthened spigot coupling
    Patent number: 11162619
    Abstract: An elongate component, such as a drill rod or adaptor, forms part of a drill string having a shoulder contact male spigot coupling. The male spigot includes a non-threaded shank and a threaded section in which an axial length of the non-threaded shank is provided at a predetermined minimum relative to an outside diameter of the spigot at the threaded section.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: November 2, 2021
    Assignee: SANDVIK INTELLECTUAL PROPERTY AB
    Inventors: Petri Ahola, David Wickström, Andreas Norman
  • Threaded coupling end for a percussion drill string component
    Patent number: 10627023
    Abstract: A threaded coupling for a drill string component includes a body on which is formed a thread. A reduction in stress concentrations and a resistance to bending moments are achieved at the thread by reducing a thread depth at at least one axial end of the thread and by arranging an endmost flank of a crest or root of the thread at an endmost helical turn.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: April 21, 2020
    Assignee: SANDVIK INTELLECTUAL PROPERTY AB
    Inventors: David Wickström, Andreas Norman
  • THREADED COUPLING END FOR A PERCUSSION DRILL STRING COMPONENT
    Publication number: 20180135783
    Abstract: A threaded coupling for a drill string component includes a body on which is formed a thread. A reduction in stress concentrations and a resistance to bending moments are achieved at the thread by reducing a thread depth at at least one axial end of the thread and by arranging an endmost flank of a crest or root of the thread at an endmost helical turn.
    Type: Application
    Filed: May 19, 2016
    Publication date: May 17, 2018
    Inventors: DAVID WICKSTRÖM, ANDREAS NORMAN
  • DRILL ROD OR ADAPTOR WITH STRENGTHENED SPIGOT COUPLING
    Publication number: 20180135782
    Abstract: An elongate component, such as a drill rod or adaptor, forms part of a drill string having a shoulder contact male spigot coupling. The male spigot includes a non-threaded shank and a threaded section in which an axial length of the non-threaded shank is provided at a predetermined minimum relative to an outside diameter of the spigot at the threaded section.
    Type: Application
    Filed: May 19, 2016
    Publication date: May 17, 2018
    Inventors: PETRI AHOLA, DAVID WICKSTRÖM, ANDREAS NORMAN