Patents Assigned to S.A. Donnay International
  • Patent number: 5018733
    Abstract: A handgrip is described for a racket for ball games in which the grip body is surrounded by a grip sleeve and a ventilation chamber is formed between the grip sleeve and the grip body. For the purpose of obtaining a substantial damping of vibrations and oscillations at the ball impact moment provision is made that the volume of the ventilation chamber is variable by the pressure forces which are exerted by the hand of the respective player during the game, and that at least a part of the openings provided in the grip sleeve form an induction and/or explusion opening for the airflow which is brought about by the volume changes.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: May 28, 1991
    Assignee: S.A. Donnay International
    Inventor: Thierry M. M. Buand