Patents by Inventor Johannes Gardstam

Johannes Gardstam 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).

  • Pierce nut and use thereof
    Patent number: 8931990
    Abstract: A pierce nut (1) for attachment to a plastically deformable metal sheet (4) has an abutment surface (14) adapted to abut against the metal sheet (4), an undercut pilot (11) protruding relatively to the abutment surface (14), and a countersunk groove (16a, 16b) which is formed in the abutment surface (14) and at least partly surrounds the pilot (11). The groove (16a, 16b) is without active undercuts facing the pilot (11). The groove comprises an inner groove (16a) and an outer groove (16b) and a ridge (17) located therebetween.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: January 13, 2015
    Assignee: Stromsholmen AB
    Inventor: Johannes Gardstam
  • Pierce nut and use thereof
    Publication number: 20070258788
    Abstract: A pierce nut (1) for attachment to a plastically deformable metal sheet (4) has an abutment surface (14) adapted to abut against the metal sheet (4), an undercut pilot (11) protruding relatively to the abutment surface (14), and a countersunk groove (16a, 16b) which is formed in the abutment surface (14) and at least partly surrounds the pilot (11). The groove (16a, 16b) is without active undercuts facing the pilot (11). The groove comprises an inner groove (16a) and an outer groove (16b) and a ridge (17) located therebetween.
    Type: Application
    Filed: June 5, 2007
    Publication date: November 8, 2007
    Inventor: Johannes Gardstam