Patents by Inventor Cornelis L. De Jong

Cornelis L. De Jong 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: 4934662
    Abstract: A method and device for installing a cable, more in particular a glass fiber cable, into a duct of a channelization system, the consideration which has led to this being based on the fact that the dragging working, considered from the cable inlet end, as caused by a flow of compressed gas effected in a relevant duct portion will increase according to a non-constant function and, dependent on the geometry and the length of the duct portion, can be insufficient over the initial part of it to compensate the friction forces exerted on the cable locally. According to the invention it has now been suggested to fulfill such a compensation function by exerting on the cable a pushing force working extending to the point where the dragging working will be sufficient to compensate the friction forces.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: June 19, 1990
    Assignee: Staat der Nederlanden (Staatsbedrijf der Posterijen, Telegrafie en Telefonie)
    Inventors: Willem Griffioen, Cornelis L. De Jong
  • Patent number: 4850569
    Abstract: A method for installing a cable, more in particular a glass fibre cable, into a duct of a channelization system, the consideration which has led to this being based on the fact that the dragging working, considered from the cable inlet end, as caused by a flow of compressed gas effected in a relevant duct portion will increase according to a non-constant function and, dependent on the geometry and the length of the duct portion, can be insufficient over the initial part of it to compensate the friction forces exerted on the cable locally. According to the invention it has now been suggested to fulfill such a compensation function by exerting on the cable a pushing force working extending to the point where the dragging working will be sufficient to compensate the friction forces.
    Type: Grant
    Filed: April 20, 1988
    Date of Patent: July 25, 1989
    Assignee: Staat Der Nederlanden (Staatsbedrijf Der Posterijen, Telegrafie En Telefonie)
    Inventors: Willem Griffioen, Cornelis L. De Jong