Patents by Inventor Robert Wald

Robert Wald 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).

  • Apparatus for resistance welding
    Patent number: 4902869
    Abstract: Apparatus for resistance welding consisting of two electrodes that face one another and are biased toward one another by a spring force. Each electrode is held by an electrode support through which an electro-magnetic force is generated to urge the supports away from each other and augment the bias exerted thereon, by converting the movement of the electrode supports away from one, into movement of the electrodes toward one another.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: February 20, 1990
    Assignee: Heinz Finzer KG
    Inventor: Robert Wald