Abstract: Machine to recover a cable, comprising at least one hydraulic pump with variable cubic capacity, provided with a system to adjust the cubic capacity, driven by a servo controller, and at least one hydraulic motor fed by said hydraulic pump by means of at least one pipe to deliver a fluid and at least one pipe to return the fluid.

Abstract: Roller unit for laying cables (11, 12, 13), comprising a frame (23, 23?) where at least one pair of sliders (25, 25?) are positioned aligned parallel to a laying direction (S1, S2) of the cables (11, 12, 13) and each provided with at least one pair of wheels (28, 28a, 28b) supporting a cable (11, 12, 13) to be laid; said sliders (25, 25?) are hinged to said frame (23, 23?) and rotatable around respective axes of rotation (A, A?) so as to vary the inclination thereof with respect to said frame (23, 23?) and therefore to vary the radius of curvature of the cable (11, 12, 13) supported; said wheels (28, 28a, 28b) are provided with an annular groove (32) to support the cables, delimited by containing wings (33) and able to define a contact and sliding surface of at least one of said cables (11, 12, 13), wherein at least said annular support groove (32) is made of or covered by a technoplastic material with polyamide (PA) base reinforced with glass fiber, if the supported cable is a conductor (11, 13), or by means

Abstract: Connection joint for cables for a cable stringing plant, comprising at least one first tubular element (18) to which a first segment (22) of a flexible member (19) is attached and positioned rotatable, at least with respect to a longitudinal axis (L) of the joint, inside a second tubular element (23) open at a first end and closed at the other end by a bottom wall (25); the bottom wall (25) comprises at least one hole (26) from which a second segment (27) of the flexible member (19) emerges; the second segment (27) is attached to a portion (32) of a third tubular element (31); the second and third tubular elements (23, 31) are provided on opposite ends with a corresponding hole (29, 35) directed substantially in a longitudinal direction and able to house a respective segment of cable (11a, 11b) to be laid.

Abstract: A cable recovery machine, having at least one traction module configured to hold and draw at least one cable, in particular of a cable laying plant, and at least one cutting module located downstream of the traction module and able to receive the cable that is introduced into the cutting module in a direction of feed (X1); the cutting module having at least one cutting unit provided with at least one cutting blade and integral with a shaft made to rotate by corresponding drive means, so that by rotating the shaft, the cutting unit is made to rotate and cuts the cable when the latter enters the cutting module in the direction of feed (X1).

Abstract: Apparatus to lay cables, comprising a work unit bearing at least a pair of capstans to support the cables and provided with a safety device cooperating with the pair of capstans; a winding and unwinding unit for the cables, provided with a dynamic braking device cooperating with a reel for winding and unwinding the cables; an adjustment and safety hydraulic circuit in which a work fluid flows and with which the following are associated: a first power transmission unit to transmit power to the work unit and to pump the work fluid toward the safety device and toward said dynamic braking device, a second motorized braking unit of the work unit cooperating with a third command unit of the safety device, and a fourth regulation unit to regulate the winding and unwinding unit comprising at least a motorized counter-traction valve of the winding and unwinding unit and cooperating with said power transmission unit.

Abstract: Machine to recover a cable, comprising at least one hydraulic pump with variable cubic capacity, provided with a system to adjust the cubic capacity, driven by a servo controller, and at least one hydraulic motor fed by said hydraulic pump by means of at least one pipe to deliver a fluid and at least one pipe to return the fluid.

Abstract: Connection joint for cables for a cable stringing plant, comprising at least one first tubular element (18) to which a first segment (22) of a flexible member (19) is attached and positioned rotatable, at least with respect to a longitudinal axis (L) of the joint, inside a second tubular element (23) open at a first end and closed at the other end by a bottom wall (25); the bottom wall (25) comprises at least one hole (26) from which a second segment (27) of the flexible member (19) emerges; the second segment (27) is attached to a portion (32) of a third tubular element (31); the second and third tubular elements (23, 31) are provided on opposite ends with a corresponding hole (29, 35) directed substantially in a longitudinal direction and able to house a respective segment of cable (11a, 11b) to be laid.

Abstract: Roller unit for laying cables (11, 12, 13), comprising a frame (23, 23?) where at least one pair of sliders (25, 25?) are positioned aligned parallel to a laying direction (S1, S2) of the cables (11, 12, 13) and each provided with at least one pair of wheels (28, 28a, 28b) supporting a cable (11, 12, 13) to be laid; said sliders (25, 25?) are hinged to said frame (23, 23?) and rotatable around respective axes of rotation (A, A?) so as to vary the inclination thereof with respect to said frame (23, 23?) and therefore to vary the radius of curvature of the cable (11, 12, 13) supported; said wheels (28, 28a, 28b) are provided with an annular groove (32) to support the cables, delimited by containing wings (33) and able to define a contact and sliding surface of at least one of said cables (11, 12, 13), wherein at least said annular support groove (32) is made of or covered by a technoplastic material with polyamide (PA) base reinforced with glass fiber, if the supported cable is a conductor (11, 13), or by means

Abstract: A cable recovery machine, comprising at least one traction module configured to hold and draw at least one cable, in particular of a cable laying plant; the traction module comprises a frame on which one or more traction wheels and one or more idle wheels are positioned; between the traction wheels and the idle wheels a space is defined for the passage and traction of the cable to be recovered; the idle wheels are provided with a support connected in a mobile manner to the frame of the traction module and provided with actuators configured to press the idle wheels against the cable that passes between them and the traction wheels, so that the space between the idle wheels and the traction wheels can be automatically adjusted on the basis of the external diameter (D1, D2) or thickness of the cable drawn.

Abstract: A cable recovery machine, comprising at least one traction module configured to hold and draw at least one cable, in particular of a cable laying plant, and at least one cutting module located downstream of the traction module and able to receive the cable that is introduced into the cutting module in a direction of feed (X1); the cutting module comprises at least one cutting unit provided with at least one cutting blade and integral with a shaft made to rotate by means of corresponding drive means, so that by rotating the shaft, the cutting unit is made to rotate and cuts the cable when the latter enters the cutting module in the direction of feed (X1).

Abstract: A cable recovery machine, comprising at least one traction module configured to hold and draw at least one cable, in particular of a cable laying plant; the traction module comprises a frame on which one or more traction wheels and one or more idle wheels are positioned; between the traction wheels and the idle wheels a space is defined for the passage and traction of the cable to be recovered; the idle wheels are provided with a support connected in a mobile manner to the frame of the traction module and provided with actuators configured to press the idle wheels against the cable that passes between them and the traction wheels, so that the space between the idle wheels and the traction wheels can be automatically adjusted on the basis of the external diameter (D1, D2) or thickness of the cable drawn

Abstract: Unit for winding and unwinding cables of a cable-laying apparatus, comprising a reel to support the cables to be wound or unwound, a support frame configured to keep said reel in a raised position with respect to the ground, and a rotation shaft solid with the reel and associated with a corresponding hydraulic drive unit; the unit also comprises at least a dynamic braking device associated with the rotation shaft and configured to allow, according to a first operating mode, the normal rotation of the shaft and therefore of the reel for winding or unwinding the cables, and to exert on the shaft and therefore on the reel, according to another operating mode, a dynamic braking condition that allows the shaft to rotate in a braked configuration for at least a certain period of time and prevents the instantaneous stoppage of the rotation of the reel.

Abstract: Apparatus to lay cables, comprising a work unit bearing at least a pair of capstans to support the cables and provided with a safety device cooperating with the pair of capstans; a winding and unwinding unit for the cables, provided with a dynamic braking device cooperating with a reel for winding and unwinding the cables; an adjustment and safety hydraulic circuit in which a work fluid flows and with which the following are associated: a first power transmission unit to transmit power to the work unit and to pump the work fluid toward the safety device and toward said dynamic braking device, a second motorized braking unit of the work unit cooperating with a third command unit of the safety device, and a fourth regulation unit to regulate the winding and unwinding unit comprising at least a motorized counter-traction valve of the winding and unwinding unit and cooperating with said power transmission unit.

Abstract: Unit for winding and unwinding cables of a cable-laying apparatus, comprising a reel to support the cables to be wound or unwound, a support frame configured to keep said reel in a raised position with respect to the ground, and a rotation shaft solid with the reel and associated with a corresponding hydraulic drive unit; the unit also comprises at least a dynamic braking device associated with the rotation shaft and configured to allow, according to a first operating mode, the normal rotation of the shaft and therefore of the reel for winding or unwinding the cables, and to exert on the shaft and therefore on the reel, according to another operating mode, a dynamic braking condition that allows the shaft to rotate in a braked configuration for at least a certain period of time and prevents the instantaneous stoppage of the rotation of the reel.

Abstract: Liquid reactive thermosetting compositions comprising:A) At least one polyepoxide or a mixture of one or more polyepoxides with at least one monoepoxide, of an aliphatic, cycloaliphatic or mixed nature;B) at least one anhydride of a di- or polycarboxylic acid of an aliphatic, cycloaliphatic or mixed nature;C) at least one catalyst capable of promoting the rapid polymerization of the mixture A+B under microwave irradiation and having general formula (I):N.tbd.C--CH.sub.2 --CH(Z)--(O).sub.r --Y.sup.+ NR.sub.1 R.sub.2 R.sub.3 X.sup.-.

Abstract: Crosslinkable liquid composition based on organic isocyanates and epoxy compounds, comprising the following components:(A) an organic polyisocyanate;(B) a polyepoxide or mixture of a polyepoxide and a monoepoxide; and(C) a catalyst constituted by at least one cyanoderivative containing a quaternary nitrogen atom,which composition can be polymerized at temperatures of 40.degree. C. or higher, by a process comprising exposure thereof to a non-ionizing electromagnetic radiation having a frequency comprised in the microwave range of frequencies, to obtain a solid material endowed with an excellent combination of physical, chemical and mechanical properties.

Abstract: Reactive compositions liquid at a temperature lower than 70.degree. C., comprising: A) at least one organic polyisocyanate; B) a mono- or poly-epoxide, or a mixture of different mono- and/or poly-epoxides: C) a catalyst, liquid at a temperature lower than 70.degree. C., consisting of a solution of at least one alkali metal halide in a polyoxyalkylenic compound or in a mixture of different polyoxyalkylenic compounds, said polyoxyalkylenic compound containing at least one hydroxyl group of alcoholic type. These reactive compositions are able to gel and solidify rapidly at temperatures between 0.degree. and 70.degree. C., to form a glassy polymer of high softening point.

Abstract: Mixtures of polyisocyanates and epoxides are cured by microwave irradiation, optionally with microwave or thermal post-curing to produce cured polymer articles having good chemical, electrical and mechanical properties.

Abstract: The present invention relates to quaternary .beta.-hydroxy-alkyl-ammonium halides and quaternary .beta.-hydroxy-cycloalkylammonium halides, which are liquid at temperatures lower than 60.degree. C., are easily and rapidly miscible in liquid epoxides, as well as in liquid poly-isocianates, generating liquid compositions which spontaneously polymerize, with fast polymerization rate, already at temperatures comprised within the range of from 0.degree. C. to 60.degree. C., yielding a solid, insoluble polymeric material endowed with very high values of softening temperature.

Abstract: Carbonate monomers are polymerized in the presence or absence of a polymerization initiator by irradiation with electromagnetic radiation in the absence of solvent or diluent.