Patents by Inventor Fredrik Vadsten

Fredrik Vadsten 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).

  • Device for a portable tool such as a brush cutter
    Patent number: 7266892
    Abstract: This invention relates to a device for a portable tool, such as a brush cutter or the like, comprising a shaft tube (11) that via a shaft tube securing means is connected to a drive unit (10). The shaft tube securing means comprises a first sleeve shaped element (14) enclosing an inner end of the shaft tube (11) and a second sleeve shaped element (13) arranged between the first sleeve shaped element (14) and a surrounding tube shaped recess (13) in the drive unit (10). The sleeve shaped element (13) is provided with one or several portions (14f) co-operating with an abutment surface (16) in the tube shaped recess (13) in order to limit the turning movement of the shaft tube (11) with respect to the drive unit (10) when being influenced by overloads.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: September 11, 2007
    Assignee: Husqvarna AB
    Inventors: Mikael Racov, Kjell Jacobsson, Fredrik Vadsten, Bernt Käller
  • Device for a portable tool such as a brush cutter
    Publication number: 20050006114
    Abstract: This invention relates to a device for a portable tool, such as a brush cutter or the like, comprising a shaft tube (11) that via a shaft tube securing means is connected to a drive unit (10). The shaft tube securing means comprises a first sleeve shaped element (14) enclosing an inner end of the shaft t ube (11) and a second sleeve shaped element (13) arranged between the first sleeve shaped element (14) and a surrounding tube shaped recess (13) in the drive unit (10). The sleeve shaped element (13) is provided with one or several portions (14f) co-operating with an abutment surface (16) in the tube shaped recess (13) in order to limit the turning movement of the shaft tube (11) with respect to the drive unit (10) when being influenced by overloads.
    Type: Application
    Filed: May 11, 2004
    Publication date: January 13, 2005
    Inventors: Mikael Racov, Kjell Jacobsson, Fredrik Vadsten, Bernt Kaller