Patents by Inventor Hendrik Antonius Backer

Hendrik Antonius Backer 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 and method for removing cables from tubes
    Patent number: 6089546
    Abstract: For removing cables from tubes, the invention provides a method wherein a cable is sucked from a tube, by connecting an evacuating pump to a cable lead-through apparatus one end of which is connected to the tube and the other end of which is provided with a lead-out opening for the free end of the cable. In one embodiment, the final portion of the cable is removed from the tube by connecting a compressor to the same cable lead-through apparatus. The invention also provides an apparatus for removing cables through suction force, wherein, in one embodiment, the same apparatus can also be used for installing cables in a tube through blowing.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: July 18, 2000
    Assignee: Koninklijke KPN N.V.
    Inventors: Willem Griffioen, Hendrik Antonius Backer