Draka Comteq B.v.

Koninklijke Kpn N.v.

Koninklijke Ptt Nederland N.v.

Nkf Kabel B.v.

Plumettaz Holding Sa

Staat Der Nederlanden Staatsbedrijf Der Posterijen, Telegrafie En

Plumettaz S.a.

Ehtp Enterprise Hydraulique Et Travaux Publics

Plummettaz S.a.

Ehtp Entreprise Hydraulique Et Travaux Publics

Willem Griffioen

Pieter Lock

Willem Greven

Arie Van Wingerden

Cornelis Van 't Hul

Frans Robbert Bakker

Gerard Plumettaz

Maja Keijzer

Geert J Prins

Andrzej Bogdan Wacinski

David F Hawkins

Harm Geert Nobach

Cornelis L De Jong

Patrick Menno Versteeg

Klaus Nothofer

Cornelis Casparus Van Bijsterveld

Gérard Plumettaz

Cornelis Van T Hul

Cornelus Van T'Hul

Tobias Roland Ahl

Cornelis Van &prime;T Hul

Cornelis Van't Hul

Hendrik Antonius Backer

Henk Nijstad

Hubertus Augustinus De Graaf

Thomas Pothof

Alexandre Uhl

Christophe Gutberlet

Method for installing an elongated element, in a submarine duct, the submarine duct having an entry port and an exit port located in outer liquid (OL) at a second depth, the method comprising the steps of:

Introducing an elongated element into a submarine duct

Method for installing a cable into a duct, comprising the steps of:

Installing a cable into a duct

A method for installing an elongated element into a duct by pushing the elongated element into the duct through a pressure chamber, introducing pressurized fluid into the duct at a nominal pressure, and applying a driving force. The method including monitoring fluid pressure into the duct and the driving force and reducing the fluid pressure to a predetermined value lower than the nominal pressure.

Apparatus and method for jetting a cable into a duct

A method for operating an elongated element through a full length of a bended duct being bended over a major part of its length, the method comprising the steps consisting in:

Method for installing an elongated element into a bended duct

A duct rod system to be pushed in a conduit of a defined configuration for installing an elongated element in the conduit and comprising at least one rod having a flexible main body, the flexible main body having a bending stiffness arrangement defined in relation to the defined configuration of the conduit to permit a friction reduction of the flexible main body in the conduit.

Duct rod system for installing an elongated element in a conduit

A method for laying an elongated element in a duct using a fluid injected under pressure through a fluid inlet in a pressure housing disposed at the elongated element inlet extremity of the duct. A mechanical drive placed before the pressure housing and the duct pushes the elongated element into the pressure housing and the duct. The method includes installing a first front end pulling pig at the front end of the elongated element and installing at least one subsequent pulling pig around the elongated element. The distance between each pulling pig is mainly constant. The method also includes applying the same maximum pressure drop to each pulling pig. The total pressure of the fluid injected being mainly equally shared by all the pulling pigs.

Process, pig and pressure housing for laying an elongated element

Disclosed is a modified pre-ferrulized cable assembly that facilitates installation of an optical fiber communication cable through narrow cable guides having sharp bends. The pre-ferrulized cable assembly includes a communication cable having a free, front end, a semi-finished communication connector, and a suction plug. The invention further relates to efficient methods for installing the modified pre-ferrulized cable assembly through a cable guide.

Method for installing a communication cable assembly

An automated optical switch for use in a central office to increase coupling density including a frame having a mating plate defining a plurality of precision alignment holes formed therethrough. In one embodiment, the precision alignment holes are sized and configured to receive corresponding pairs of optical fibers with polished end faces disposed within ferrules free of connector housings. In another embodiment, the precision alignment holes are sized and configured to receive optical fibers with polished end faces free of ferrules and connector housings.

Automated optical switch and method

A cable, comprising a cylindrical cable wall () surrounding a hollow cable inner space (), wherein the cable () is provided with at least one signal conductor (), for instance glass fiber and/or glass fiber bundle, wherein, in a first position, the signal conductor () extends substantially in the cable inner space () and over a particular distance along the cable wall (), along an at least partly curved path, such that a length of the signal conductor () is larger than a length of the cable wall ().

Cable, and a network and the use of such a cable

An optical waveguide assembly is described that comprises a storage device having a housing () and a rotatable reel (), configured for storing a flexible optical waveguide, wherein the reel () is coupled to a flexible optical waveguide unit () having an external diameter (D) of at most 2 mm for winding and/or unwinding the waveguide unit ().

Optical waveguide assembly, storage device, and method for installing an optical waveguide

A cable, provided with at least one signal conductor (), for instance glass fiber and/or glass fiber bundle, received in a cable inner space (), such that a signal conductor take-out part can be taken out of the cable inner space (), wherein the length of said take-out part is at least 1% of a cable length over which the take-out part can be taken out of the cable, preferably more than 2%, in particular more than 4% and more in particular more than 10%.

Cable, and a use and method for constructing a cable network

Modified pre-ferrulized communication cable assembly and installation method

Disclosed is an improved method and apparatus for installing a cable into cable guide tubing and the like. The method typically includes rotating a reel of cable guide tubing at least 360&#xb0; while, using compressed gas, feeding a cable, such as a plurality of microducts, into the cable guide tubing. The related apparatus includes a cable injection unit and a rotation coupling unit to facilitate the installation of cable (e.g., microducts) into the rotating cable guide tubing.

Method and device for installing cable into cable guide tubing

A cable is installed in a duct by means of blowing (and, optionally, synergetic pushing) and lubricating the cable during field installation. Lubricating the cable is done after the cable exits from the cable blowing equipment and hence takes place in a pressurized airflow passage. Lubricant supplied from an external reservoir drains into a pressurized lubricator space through which the cable moves. Foam-plugs seal the entrance and the exit of the lubricator space. The cable is wetted by the lubricant as it moves through the lubricator space, and excess lubricant is wiped by the foam plug, leaving only a thin film of lubricant on the cable as it moves out of the lubricator. In one embodiment, the lubricator is fitted with a single wiping member in the form of an annular plug of open cell foam material, and the cable passes through laterally opposite sections of the annular plug. The lubricator housing is formed in mating sections, and the internal lubricator is also formed in mating sections. The lubricator is integrated with cable blowing equipment in one embodiment. A bundle of guide tubes is lubricated in another embodiment.

Optical cable lubricator with reservoir

Disclosed is an optical fiber cable that includes a main tube. A guide tube, which includes at least one optical element, is positioned within the main tube's central space. A compressible element is also positioned within the main tube's central space. To reduce the adverse effects of ice formation within the optical fiber cable, the compressible element more readily deforms than do the guide tube and main tube. Also disclosed is a method for modifying a conventional optical fiber cable with a compressible element according to the present invention.

Growing community of inventors

Ter Aar, Netherlands

Willem Griffioen