Patents by Inventor Jean Hufenus

Jean Hufenus 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).

  • Patent number: 4690406
    Abstract: A variable balance racket has a weight moveable from an inactive or rest position near the grip of the handle to an active position adjacent the head of the racket to increase the striking force of the head. The weight can be moved to the active position and held in this active position by a retainer, against the action of an elastic element which returns the weight to the rest position. The weight is released in response to the centrifugal force of the swing of the racket so it is automatically returned to the rest position before the next swing. This arrangement enables the player to move the weight to the active position prior to a serve or anticipated smash, while returning the weight to the rest position after such a swing for normal play or repositioning in the active position by the player.
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: September 1, 1987
    Inventor: Jean Hufenus