Patents by Inventor Willem H. M. van Dreumel

Willem H. M. van Dreumel 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: 5536344
    Abstract: A method of installing a thermoplastic fastener insert unit into a thermoplastic composite resin panel includes the steps of cutting a hole in the plastic resin panel of a diameter less than the annular flange of the fastener insert unit. The fastener insert unit is then rotated to frictionally generate heat between the annular flange and the plastic resin panel until sufficient heat has been generated to enable the welding of a fastener insert unit directly to the plastic resin panel. Additionally, the lower surface of the fastener insert unit can also be frictionally welded to an interior surface of the plastic resin panel.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: July 16, 1996
    Assignee: Shur-Lok Corporation
    Inventor: Willem H. M. van Dreumel