Patents by Inventor Ingvar Eklund

Ingvar Eklund 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).

  • Self-tapping screw
    Patent number: 4161132
    Abstract: A self-tapping screw, particularly for use in hard materials, such as bricks, concrete and rock, having a screw thread comprising a plurality of circumferentially successive thread portions between which there are voids, wherein at least the front end of each such thread portion is smoothly rounded from the central essentially cylindrical core portion of the screw and rearwardly toward the apex of the screw thread portion.
    Type: Grant
    Filed: December 6, 1977
    Date of Patent: July 17, 1979
    Assignee: Bulten-Kanthal Aktiebolog
    Inventors: Ingvar A. Eklund, Sixten H. Lejdegard
  • Method of assembling and disassembling a pre-tensioned screwed joint and a device for carrying out the method
    Patent number: 3947948
    Abstract: A pre-tensioned, screwed joint is assembled or disassembled by using a piston and rod arrangement to elastically extend the screw while a nut is applied or removed.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: April 6, 1976
    Assignee: Aktiebolaget Motala Verkstad
    Inventors: Roland Fredriksson, Ingvar Eklund