Patents by Inventor Stefan Zivkovic

Stefan Zivkovic 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).

  • Thread cutting tap and a method of its manufacture
    Patent number: 7553114
    Abstract: A thread cutting tap having a threaded portion for cutting out a thread in a wall of a workpiece opening into which the threaded portion is to be introduced. The threaded portion is provided with at least two cutting edges extending in a circumferential direction of the body. Each cutting edge is an integral peripheral part of a flank portion extending substantially radially from the body. The flank portions define between one another a chip removal flute extending in the longitudinal extension of the body for removal of chips. At least one of the flank portions has a side wall divided into a pair of elongated concave surfaces separated by an elongated ridge constituting a chip-breaking member. The chip removal flutes are at least partly helically shaped.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: June 30, 2009
    Assignee: Sandvik Intellectual Property AB
    Inventors: Markus Oknestam, Stefan Zivkovic
  • Thread cutting tap and a method of its manufacture
    Publication number: 20060216124
    Abstract: A thread cutting tap having a threaded portion for cutting out a thread in a wall of a workpiece opening into which the threaded portion is to be introduced. The threaded portion is provided with at least two cutting edges extending in a circumferential direction of the body. Each cutting edge is an integral peripheral part of a flank portion extending substantially radially from the body. The flank portions define between one another a chip removal flute extending in the longitudinal extension of the body for removal of chips. At least one of the flank portions has a side wall divided into a pair of elongated concave surfaces separated by an elongated ridge constituting a chip-breaking member. The chip removal flutes are at least partly helically shaped.
    Type: Application
    Filed: April 29, 2002
    Publication date: September 28, 2006
    Inventors: Markus Oknestam, Stefan Zivkovic