Patents by Inventor Bernard Lodder

Bernard Lodder 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).

  • Welding sleeve with connecting means having an upper and lower part
    Patent number: 4855574
    Abstract: Welding sleeve comprising electrically conductive material embedded in the thermoplastic material of the wall of said sleeve.In a sleeve at least two connecting means are present which each comprise at least two metal parts which can cooperate in clamping contact with the electrically conductive material.One metal part is inserted from the inside of the sleeve and one part from the outside; appropriate coaxial bores being present to allow passage of a pin on the lower part and the body of the upper part.Upon mounting the upper part and lower part are connected with use of a force; the electrically conductive material is clampingly contacted.The invention also relates to a method for forming a welding sleeve according to the invention and to an equipment for use in carrying out such a method.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: August 8, 1989
    Assignee: Wavin BV
    Inventors: Bernard Lodder, Roelof Koopman, Jan Visscher