Patents by Inventor Goran Hagelin

Goran Hagelin 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).

  • Rock drill product and method
    Patent number: 6978852
    Abstract: A threaded rock drill element for percussive rock drilling includes a body forming a center axis and having a hardened thread. The thread includes thread crests and thread bottoms and a hardened zone having increased hardness. The hardened zone includes first and second hardened areas extending radially from a crest and bottom (valley), respectively, of the thread, to a boundary curve of the hardened zone. The boundary curve has convex portions extending along the thread crests, and concave portions extending along the thread bottoms.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: December 27, 2005
    Assignee: Sandvik AB
    Inventors: Ann-Cathrin Hedlund, Göran Hagelin, Agne Lundquist
  • Rock drill product and method
    Publication number: 20030230433
    Abstract: A threaded rock drill element for percussive rock drilling includes a body forming a center axis and having a hardened thread. The thread includes thread crests and thread bottoms and a hardened zone having increased hardness. The hardened zone includes first and second hardened areas extending radially from a crest and bottom (valley), respectively, of the thread, to a boundary curve of the hardened zone. The boundary curve has convex portions extending along the thread crests, and concave portions extending along the thread bottoms.
    Type: Application
    Filed: May 16, 2003
    Publication date: December 18, 2003
    Applicant: SANDVIK AB
    Inventors: Ann-Cathrin Hedlund, Goran Hagelin, Agne Lundquist