Patents by Inventor Alberto Bareggi
Alberto Bareggi 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).
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Publication number: 20210115233Abstract: Power cable having an insulation system comprising at least one layer made of a thermoplastic material based on a polypropylene matrix admixed with a dielectric fluid, the thermoplastic material having a melting enthalpy of from 15 to 50 J/g and the polypropylene matrix being made of a material selected from: a heterophasic ethylene-propylene copolymer (a) having a melting enthalpy of from 15 to 50 J/g; or an intimate admixture of (a) and a propylene homopolymer or an ethylene propylene copolymer (b) having a melting enthalpy greater than 50 J/g. The cable is particularly suitable for current transport at high voltage or extra high voltage.Type: ApplicationFiled: November 30, 2016Publication date: April 22, 2021Applicant: PRYSMIAN S.p.A.Inventors: Alberto BAREGGI, Luigi CAIMI
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Patent number: 10839978Abstract: An electric cable for high-voltage applications is disclosed which comprises a core surrounded by an electrically insulating layer made of a composition based on a thermoplastic polymeric material charged with boron nitride powder in an amount up to 20 wt % with respect to the weight of the insulating composition, the boron nitride powder having a particle size distribution D50 up 0 to 15 ?m. Such a cable has improved thermal conductivity property as well as good dielectric resistance and workability in particular through extrusion processes.Type: GrantFiled: October 12, 2017Date of Patent: November 17, 2020Assignee: Prysmian S.p.A.Inventors: Romain Besson, Luigi Caimi, Alberto Bareggi, Armando Michele Ferrari, Ivan Troia
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Publication number: 20200312482Abstract: An electric cable for high-voltage applications is disclosed which comprises a core surrounded by an electrically insulating layer made of a composition based on a thermoplastic polymeric material charged with boron nitride powder in an amount up to 20 wt % with respect to the weight of the insulating composition, the boron nitride powder having a particle size distribution D50 up to 15 ?m. Such a cable has improved thermal conductivity property as well as good dielectric resistance and workability in particular through extrusion processes.Type: ApplicationFiled: October 12, 2017Publication date: October 1, 2020Applicant: Prysmain S.p.A.Inventors: Romain BESSON, Luigi CAIMI, Alberto BAREGGI, Armando Michele FERRARI, Ivan TROIA
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Publication number: 20200126687Abstract: An electric cable comprising: a cable core having a radius and comprising an electric conductor and an insulating system; a first metal layer in radially outer position with respect to the cable core; and a semiconductive protecting layer between the cable core and the first metal layer. The insulating system comprises an insulating layer based on a propylene copolymer and the protecting layer is made of non-expanded material and has a thickness of from 0.5% to 3% the radius of the cable core. The cable is apt to safely operate at thermal cycles of from 20° C. to at least 90° C. (for example up to 130° C. or more), with substantially no deformation of the metal layer and of the overall cable structure.Type: ApplicationFiled: December 27, 2016Publication date: April 23, 2020Applicant: PRYSMIAN S.p. A.Inventors: Alberto BAREGGI, Paolo MAIOLI, Armando Michele FERRARI
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Patent number: 10217544Abstract: Energy cable comprising, from the interior to the exterior, an electrical conductor, an inner semiconductive layer, an electrically insulating layer made from a thermoplastic material in admixture with a dielectric fluid, and an outer semiconductive layer, wherein the outer semiconductive layer comprises: (i) from 55 wt % to 90 wt % of a copolymer of ethylene with at least one ester comonomer having an ethylenic unsaturation; (ii) from 10 wt % to 45 wt % of a propylene copolymer with at least one olefin comonomer selected from ethylene and an ?-olefin other than propylene, said copolymer having a melting point of from 145° C. to 170° C. and a melting enthalpy of from 40 J/g to 80 J/g; (iii) at least one conductive filler; (iv) at least one dielectric fluid; the amounts of (i) and (ii) being expressed with respect to the total weight of the polymeric components of the layer.Type: GrantFiled: December 17, 2014Date of Patent: February 26, 2019Assignee: PRYSMIAN S.p.AInventors: Luigi Caimi, Vincenzo Crisci, Alberto Bareggi
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Publication number: 20170330646Abstract: Energy cable comprising, from the interior to the exterior, an electrical conductor, an inner semiconductive layer, an electrically insulating layer made from a thermoplastic material in admixture with a dielectric fluid, and an outer semiconductive layer, wherein the outer semiconductive layer comprises: (i) from 55 wt % to 90 wt % of a copolymer of ethylene with at least one ester comonomer having an ethylenic unsaturation; (ii) from 10 wt % to 45 wt % of a propylene copolymer with at least one olefin comonomer selected from ethylene and an ?-olefin other than propylene, said copolymer having a melting point of from 145° C. to 170° C. and a melting enthalpy of from 40 J/g to 80 J/g; (iii) at least one conductive filler; (iv) at least one dielectric fluid; the amounts of (i) and (ii) being expressed with respect to the total weight of the polymeric components of the layer.Type: ApplicationFiled: December 17, 2014Publication date: November 16, 2017Applicant: PRYSMIAN S.p.A.Inventors: Luigi CAIMI, Vincenzo CRISCI, Alberto BAREGGI
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Patent number: 8916776Abstract: An electric power cable contains a core and a jacket forming the exterior of the cable. The jacket is formed by extruding a first layer and a second layer over a plurality of concentric neutral elements, substantially encapsulating these elements. At least the first layer is an expanded polymeric material, by having its density reduced through the use of a foaming agent during extrusion. The second layer, which may also be expanded, is extruded around the first layer. The expanded polymeric material makes stripping the jacket easier, minimizes indentations in the cable's insulation layers, lightens the cable, and increases the cable's flexibility.Type: GrantFiled: July 15, 2005Date of Patent: December 23, 2014Assignee: Prysmian Cavi E Sistemi Energia S.R.L.Inventors: Paul Cinquemani, Andrew Maunder, Paolo Veggetti, Alberto Bareggi, Sergio Belli
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Patent number: 8772638Abstract: Process for manufacturing a cable comprising the following steps:(a) conveying at least one conductor to an extruder apparatus;(b) extruding an insulating coating layer radially external to said at least one conductor; (c) longitudinally folding a metal tape around said extruded insulating coating layer, said metal tape bearing at least one adhesive coating layer in a radially external position; (e) extruding at least one continuous coating layer comprising at least one polyamide or a copolymer thereof around and in contact with said folded metal tape; wherein the step (e) is carried out at a draw down ratio (DDR) not higher than 2.5, preferably of from 1.2 to 2.0.Type: GrantFiled: August 17, 2009Date of Patent: July 8, 2014Assignee: Prysmian Cavi E Sistemi Energia S.R.L.Inventors: Alberto Lumachi, Paolo Veggetti, Luca Giorgio De Rai, Franck O'Neil, Alberto Bareggi, Marco Frigerio, Sergio Belli
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Patent number: 8765035Abstract: A process for manufacturing a self-extinguishing cable including at least one transmissive element and at least one flame-retardant coating in a position radially external to the at least one transmissive element, wherein the at least one coating includes an expanded flame-retardant polymeric material having (a) at least one expandable polymer; (b) at least one expanding agent; (c) at least one flame-retardant inorganic filler, in an amount of 100 parts by weight of 250 parts by weight with respect to 100 parts by weight of the at least one expandable polymer. The process includes the following steps: (i) feeding the flame-retardant polymeric material to an extruding apparatus, therein melting and mixing it; (ii) passing the flame-retardant polymeric material obtained in step (i) through at least one static mixer; and (iii) depositing by extrusion the flame-retardant polymeric material obtained in step (ii) onto the at least one transmissive element conveyed to the extruding apparatus.Type: GrantFiled: December 24, 2003Date of Patent: July 1, 2014Assignee: Prysmian Cavi E Sistemi Energia S.R.L.Inventors: Gianbattista Grasselli, Alberto Bareggi, Cristiana Scelza, Marco Frigerio, Paolo Veggetti, Sergio Belli
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Patent number: 8723041Abstract: A process for manufacturing an electric cable including at least one core including a conductor and an insulating coating surrounding the conductor includes the steps of: providing a polyolefin material, a silane-based cross-linking system and a foaming system including at least one exothermic foaming agent in an amount of 0.1% to 0.5% by weight with respect to the total weight of the polyolefin material; forming a blend with the polyolefin material, the silane-based cross-linking system and the foaming system; and extruding the blend on the conductor to form the insulating coating. An electric cable includes at least one core consisting of a conductor and an insulating coating surrounding the conductor and in contact therewith, the insulating coating consisting of a layer of expanded, silane-cross-linked polyolefin material having an expansion degree of 3% to 40%.Type: GrantFiled: December 22, 2005Date of Patent: May 13, 2014Assignee: Prysmian Cavi e Sistemi Energia S.R.L.Inventors: Marco Frigerio, Flavio Casiraghi, Vincenzo Crisci, Gianbattista Grasselli, Jean-Louis Pons, Alberto Bareggi
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Publication number: 20140072703Abstract: A process for manufacturing an energy cable having at least one conductor and at least one polymeric coating layer, includes compounding a polypropylene matrix and a dielectric fluid to obtain a polymeric mixture; raising flow pressure of the polymeric mixture; filtering the polymeric mixture; causing the polymeric mixture to flow through an extrusion head to produce the coating layer on the conductor, and cooling the cable.Type: ApplicationFiled: December 23, 2010Publication date: March 13, 2014Inventors: Giovanni Pozzati, Alberto Bareggi, Vincenzo Crisci
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Patent number: 8535033Abstract: A method for manufacturing a cable, the cable including at least one transmissive element and at least one coating layer made of a polymeric material and arranged at a radially outer position with respect to the transmissive element. The method includes the steps of: a) feeding the polymeric material to an extrusion apparatus including an extrusion head, the extrusion head including a male die; a female die coaxially arranged with respect to the male die; a conveying channel, at least one portion of which is defined between the male die and the female die; and b) controlling a cross-sectional area of the at least one portion of the conveying channel in response to a detected quantity, the quantity being caused to vary during the manufacturing of the cable as a function of the actual extrusion speed. An extrusion apparatus for carrying out the process.Type: GrantFiled: February 23, 2012Date of Patent: September 17, 2013Assignee: Prysmian Cavi e Sistemi Energia S.R.L.Inventors: Walter Castiglioni, Luca Balconi, Alberto Bareggi, Sergio Belli
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Publication number: 20120177765Abstract: A method for manufacturing a cable, the cable including at least one transmissive element and at least one coating layer made of a polymeric material and arranged at a radially outer position with respect to the transmissive element. The method includes the steps of: a) feeding the polymeric material to an extrusion apparatus including an extrusion head, the extrusion head including a male die; a female die coaxially arranged with respect to the male die; a conveying channel, at least one portion of which is defined between the male die and the female die; and b) controlling a cross-sectional area of the at least one portion of the conveying channel in response to a detected quantity, the quantity being caused to vary during the manufacturing of the cable as a function of the actual extrusion speed. An extrusion apparatus for carrying out the process.Type: ApplicationFiled: February 23, 2012Publication date: July 12, 2012Applicant: Prysmian Cvi Sistemi Energia S.r.l.Inventors: Walter CASTIGLIONI, Luca BALCONI, Alberto BAREGGI, Sergio BELLI
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Patent number: 8147739Abstract: A method for manufacturing a cable, the cable including at least one transmissive element and at least one coating layer made of a polymeric material and arranged at a radially outer position with respect to the transmissive element. The method includes the steps of: a) feeding the polymeric material to an extrusion apparatus including an extrusion head, the extrusion head including a male die; a female die coaxially arranged with respect to the male die; a conveying channel, at least one portion of which is defined between the male die and the female die; and b) controlling a cross-sectional area of the at least one portion of the conveying channel in response to a detected quantity, the quantity being caused to vary during the manufacturing of the cable as a function of the actual extrusion speed. An extrusion apparatus for carrying out the process.Type: GrantFiled: April 27, 2005Date of Patent: April 3, 2012Assignee: Prysmian Cavi e Sistemi Energia S.R.L.Inventors: Walter Castiglioni, Luca Balconi, Alberto Bareggi, Sergio Belli
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Patent number: 7999188Abstract: A cable for transporting or distributing electric energy, especially medium or high voltage electric energy, includes at least one electrical conductor, at least one electrically insulating layer surrounding the electrical conductor, and at least one sheath surrounding the electrically insulating layer, wherein the sheath includes 65% to 95% by weight of at least one thermoplastic ethylene polymer; 5% to 35% by weight of at least one plasticizing agent, the percentages being expressed with respect to the total weight of the sheath. The above sheath guarantees improved flexibility without impairing mechanical properties and particularly thermopressure resistance, which is essential to preserve shape and integrity of the screen layer during cable installation and use at high operating temperatures.Type: GrantFiled: June 28, 2007Date of Patent: August 16, 2011Assignee: Prysmian S.p.A.Inventors: Gabriele Perego, Alberto Bareggi, Sergio Belli
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Patent number: 7816607Abstract: A process for manufacturing a multipolar cable having at least one pair of cores, each core having at least one conductive element and at least one layer of electrical insulation in a position which is radially external to the at least one conductive element. The process includes the steps of: a) assembling the at least one pair of cores so as to form an assembled element having a plurality of interstitial zones between the cores, and b) depositing by co-extrusion an expandable polymeric material in a position which is radially external to the cores so as to fill the interstitial zone and to form a filling layer of substantially circular transverse cross section, and at least one containment layer of polymeric material in a position radially external to the filling layer. The multipolar cable obtained from the process.Type: GrantFiled: November 11, 2008Date of Patent: October 19, 2010Assignee: Prysmian Cavi E Sistemi Energia S.R.L.Inventors: Sergio Belli, Alberto Bareggi, Paolo Veggetti, Luca Balconi, Paolo Bossi
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Patent number: 7811494Abstract: A process for manufacturing a cable which includes a conductor; an inner semiconductive layer surrounding the conductor and having a thickness lower than or equal to 0.4 mm; and an insulating layer surrounding the inner semiconductive layer.Type: GrantFiled: November 23, 2004Date of Patent: October 12, 2010Assignee: Prysmian Cavi E Sistemi Energia S.r.l.Inventors: Gaia Dell'Anna, Alberto Bareggi, Sergio Belli
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Patent number: 7807091Abstract: A method and plant for the introduction of a liquid into a molten mass under pressure. Such a method and plant are particularly, but not exclusively, suitable for the formation of a coating layer on a cable element having at least one conductor, the layer having an extruded thermoplastic polymer forming a continuous phase incorporating a dielectric liquid, and are useful, for example, in the production of an electric cable for the transportation and/or distribution of electrical power. The method includes the steps of bringing the liquid to a predetermined pressure greater than the pressure of the molten mass; feeding the liquid into a plurality of storage tanks, and injecting the liquid into the molten mass at an injection pressure equal to the above-mentioned predetermined pressure by means of a plurality of injectors in respective fluid communication with the plurality of storage tanks.Type: GrantFiled: October 31, 2003Date of Patent: October 5, 2010Assignee: Prysmian Cavi e Sistemi Energia S.r.l.Inventors: Luca Balconi, Gaia Dell'Anna, Alberto Bareggi, Sergio Belli
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Patent number: 7790222Abstract: A method for producing a cable including at least one transmissive element, for example, an element transmitting electrical energy or optionally optical signals as well, and an expanded and cross-linked coating layer in a radially outer position with respect to the at least one transmissive element, the coating layer having a composition including an expandable and cross-linkable polymeric material. The method includes a) extruding the composition; b) forming a coating layer made of expandable and cross-linkable polymeric material with the composition thus extruded; c) expanding the coating layer made of expandable and cross-linkable polymeric material; and d) cross-linking the coating layer made of expandable and cross-linkable polymeric material. The expanding and cross-linking steps c) and d) are carried out by heating the coating layer made of expandable and cross-linkable polymeric material at atmospheric pressure by means of a suitable heating fluid.Type: GrantFiled: December 23, 2002Date of Patent: September 7, 2010Assignee: Prysmian Cavi e Sistemi Energia S.R.L.Inventors: Luca Balconi, Alberto Bareggi, Sergio Belli
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Publication number: 20100163269Abstract: A cable for transporting or distributing electric energy, especially medium or high voltage electric energy, includes at least one electrical conductor, at least one electrically insulating layer surrounding the electrical conductor, and at least one sheath surrounding the electrically insulating layer, wherein the sheath includes 65% to 95% by weight of at least one thermoplastic ethylene polymer; 5% to 35% by weight of at least one plasticizing agent, the percentages being expressed with respect to the total weight of the sheath. The above sheath guarantees improved flexibility without impairing mechanical properties and particularly thermopressure resistance, which is essential to preserve shape and integrity of the screen layer during cable installation and use at high operating temperatures.Type: ApplicationFiled: June 28, 2007Publication date: July 1, 2010Inventors: Gabriele Perego, Alberto Bareggi, Sergio Belli