Patents by Inventor Otto Kjellberg

Otto Kjellberg 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).

  • Exercise apparatus and a weight selection system
    Patent number: 7946968
    Abstract: The present invention relates to an exercise apparatus comprising a weight stack for opposing a given exercise motion through a cable and pulley system. The weight stack comprises a set of weights vertically stacked on each other. The weights have a central aperture formed therein through which a lifting stem is downwardly insertable. Each weight is provided with weight selector means, which are pivotally engagable with said lifting stem for connecting and locking a selectable number of weights to the central lifting stem.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: May 24, 2011
    Assignee: Mats Thulin AB
    Inventor: Otto Kjellberg
  • EXERCISE APPARATUS AND A WEIGHT SELECTION SYSTEM
    Publication number: 20100227745
    Abstract: The present invention relates to an exercise apparatus comprising a weight stack for opposing a given exercise motion through a cable and pulley system. The weight stack comprises a set of weights vertically stacked on each other. The weights have a central aperture formed therein through which a lifting stem is downwardly insertable. Each weight is provided with weight selector means, which are pivotally engagable with said lifting stem for connecting and locking a selectable number of weights to the central lifting stem.
    Type: Application
    Filed: December 18, 2009
    Publication date: September 9, 2010
    Applicant: MATS THULIN AB
    Inventor: Otto KJELLBERG