Patents by Inventor James J. Hartwig

James J. Hartwig 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).

  • Publication number: 20040148977
    Abstract: A balance ring attachment with a spinner basket having an annular upper edge surrounding an opening therein. The spinner basket has a first cam surface adjacent the annular upper edge. A balance ring is sized to fit and register with the annular upper edge of the spinner basket. The balance ring has a second cam surface retentively engaging the first cam surface for attaching the balance ring to the annular upper edge of the spinner basket.
    Type: Application
    Filed: February 3, 2003
    Publication date: August 5, 2004
    Inventor: James J. Hartwig
  • Patent number: 5077898
    Abstract: A shield and structure for mounting the shield to a hand held grass trimmer is provided. The generally flat shield is perpendicularly mounted to a gear box extension which is carried coaxial with the drive shaft tube. Twisting and moment forces incurred by the shield when the trimmer is resting on the ground are reduced by mounting the shield to support the weight of the trimmer generally perpendicular to the length of the drive shaft tube. The mounting structure prevents sliding of the shield on the drive tube and provides multiple attaching members to prevent rotation of the shield on the drive tube.
    Type: Grant
    Filed: July 25, 1990
    Date of Patent: January 7, 1992
    Assignee: Deere & Company
    Inventor: James J. Hartwig