Plumettaz S.a.

Koninklijke Kpn N.v.

Draka Comteq B.v.

Nkf Kabel B.v.

Plumettaz Holding Sa

Ehtp Enterprise Hydraulique Et Travaux Publics

Plumettaz As

Gebr. Kupfer

Entreprise Hydraulique Et Travaux Publics—e.h.t.p.

Plumettaz

Gerard Plumettaz

Willem Griffioen

Arie Van Wingerden

Pieter Lock

Willem Greven

Cornelis Van 't Hul

Frans Robbert Bakker

Tobias Roland Ahl

Walter Wiederkehr

Andrzej Wacinski

Joe Kupfer

Joel Perelle

Giovanni Pozzati

Claude Trichard

Stephane Oberli

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

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 straightener removes mini-bends from cable as it is unwound from a reel for installation in an underground duct, providing improved blowing performance for any cable with non-negligible stiffness and that exhibits reel-set or shape memory recovery, for example cables enclosed within small diameter tubular steel jackets, cables enclosed within aluminum laminated polymer sheets, and cables enclosed within hard polymer tubing. Residual stresses induced in such cables are reduced by first and second sets of straightener rollers prior to pushing/blowing installation.

Optical cable installation with mini-bend reduction

When a tube is laid in a duct by a blowing process, the extremity of the tube first introduced in the duct is fitted with an end cap fastened in an airtight fashion on said extremity and fitted with a valve suitable to control the pressure P inside the tube, so that is always greater than the pressure P in the duct. In this matter, deformations or implosions of the tube are avoided.

Process for laying a tube in a duct and device for pressurizing a tube during laying

A pulling apparatus includes a frame having a securing stirrup for securing a beam. The beam is provided at one end with a return pulley. Due to the structure of the securing stirrup, the tractive forces are transferred completely to the beam and the frame so that the means for securing the apparatus to the ground can be minimized. Such a design easily allows the beam to be set at an angle when the pipe is off center. The apparatus may also be easily placed in a cable chamber for operation.

Apparatus for pulling a traction cable through an underground pipe

A cable (5) is inserted in a tube (2) wound on a tube reel (1). The cable is fed from a cable reel (6) through a cable-advancing unit (4) into a free inlet end (2.1) of the tube (2). Compressed air is applied to an air inlet (8) of the advancing unit (4), and led through the tube along the cable already inserted in the tube. The tube reel is put on a support 7, which is driven to a periodic movement in the vertical direction between to extreme positions (amplitude A, period P). During part of each period the movement is a free fall, or at least approximates a free fall. The movement may be sinusoidal with period P=2.pi.�A/g!.sup.1/2 (g is gravitational constant). In this case, the support (7) may be part of a rotatably supported lever, or may be part of a seesaw. In addition, the movement may be the vertical component of a maintained swinging movement. In this case the support (7) may be the swinging part of a Chinese swing.

Method for inserting a cable-like element into a tube coiled in or on a

A cable (5) is inserted, by way of a free end (2.1), into a tube (2) wound around a tube reel (1) which is fixed, with its winding axis (y) vertical, onto a carrier (7). The carrier with the tube reel is subjected to a periodical movement having a vertical component and a longitudinal component. The vertical component is a vertical oscillation having a period (P) and an amplitude (A.sub.v =gP.sup.2 /32) for an, at any rate approximately, 'free-fall' movement during part of each period, preferably during half a period. The longitudinal component is an oscillating rotation around the vertical winding axis of the tube reel having the same period (P) and an amplitude (A.sub.L). The 'free-fall' movement is preferably commenced when the rotational direction of the oscillating rotation is reversed and becomes backward, as opposed to the insertion direction of the cable.

Method and device for inserting a cable-shaped member into an elongated,

A process and apparatus for stocking cables and other coilable elements such as, for example, hosepipes, pipes and tubes. A stocking device includes a stocking basket formed by a circular outer wall. An edge of a bottom wall serving as a winding base is disposed against the outer wall. A guide member and a fixed or rotary laying stocking device assist in coiling the element. The laying stocking device angularly leads the element to be coiled from the guide toward the stocking basket. At least one height adjustment mechanism is also provided. The height adjustment mechanism adjusts the height of the laying device in order to insure that there is ample space between a stack of the coilable elements in the stocking basket and the laying device. The height adjustment mechanism may be automatic, manual or self regulating.

Stocking device for coilable elements and method of use

Apparatus for suspending a scaffold or the like, used for working on the outer walls of buildings, comprising a capstan made up of four pairs of pulleys driven by an electric motor. The pulleys have grooves for receiving suspension cables, each of which is wound over a pair of pulleys in five turns. On the slack-portion side, each cable is guided over a traverse mechanism, then runs onto a reel mounted via friction couplings on a shaft. This shaft is driven by the motor when the scaffold is raised, while during the descent it is locked by a monodirectional coupling, a driving wheel then being free on the shaft. A safety release device intended to intervene in case of lessening of the tractive force yielded by the friction couplings is combined with the traverse mechanism. If the tension of the slack portion of cable drops below a given threshold, a safety release cuts off the current supply to the motor and actuates an electromagnetic brake.

Suspension apparatus for a scaffold

A cable is supported and advanced by two moving assemblies disposed in the form of a V and each preferably comprising a notched belt of rectangular cross-section. Rollers supporting the notched belts are in turn supported by shafts and are placed overhangingly on these shafts, the lower ends of which are connected to a frame. Neither the frame nor the drive means exceed the driving belts in width. A holding assembly, supported by a framework which has four uprights and also does not exceed the driving belts in width, is removable, and the uprights are hinged to the upper ends of fixed shafts of the intermediate rollers.

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Territet-Veyraux, Switzerland

Gerard Plumettaz