Patents Assigned to Pirelli S.p.A.
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Patent number: 4623213Abstract: Method for joining electrically and mechanically the multiple aluminum wires of a pair of electrical cable conductors in which the bared conductor ends are beveled and welded together and a metal sleeve, which is more rigid than the aluminum of the conductors, is applied around the weld and lengths of the conductors at each side of the weld and compressed until the sleeve has an outer size substantially equal to the size of the portions of the conductors at each side thereof. The sleeve has inner grooves for receiving displaced aluminum, and if the conductors have central channels, the channels are joined at the conductor ends by a relatively incompressible tube which fits into the channels and which may have peripheral grooves for receiving displaced aluminum. Also, a cable joint made by such method.Type: GrantFiled: October 29, 1985Date of Patent: November 18, 1986Assignee: Societa' Cavi Pirelli S.p.A.Inventors: Enrico Dotti, Angelo Sala
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Patent number: 4620412Abstract: A process and apparatus for laying optical fibers in the helical grooves of a core for an optical fiber telecommunication cable in which the rotatable bobbins carrying the optical fibers are held in axially fixed positions while the core with helical grooves and the fibers are fed to and through a rotatable fiber inserting device which has projections extending into the grooves which cause rotation of the device as the core is advanced. Between the bobbins and the fiber inserting device there is a supporting tube through which the core passes and the outer surface of which engages and supports the fibers. The downstream end of the tube terminates in advance of the fiber inserting device so that the fibers may enter the grooves in the core at the fiber inserting device.Type: GrantFiled: December 12, 1985Date of Patent: November 4, 1986Assignee: Societa Cavi Pirelli S.p.A.Inventor: Antonio Portinari
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Patent number: 4614509Abstract: A toothed belt constituted by an annular body of elastomeric material, having a structure that is resistant to tensile stress embedded therein and having a toothing on one of its faces. The teeth of said annular body have at least one slot corresponding to their own top.Type: GrantFiled: March 11, 1985Date of Patent: September 30, 1986Assignee: Industrie Pirelli S.p.A.Inventors: Giorgio Tangorra, Mario Cicognani, Vincenzo Macchiarulo
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Patent number: 4609509Abstract: A process and apparatus for the vulcanization of the insulation of an electric cable in which the cable core with the insulation thereon are passed through a tube filled with a liquid having a specific weight substantially equal to the specific weight of the insulation. The section of the tube nearer the entrance end is supplied with degassed liquid at vulcanizing temperature and the following section is supplied with degassed liquid at a temperature for cooling the insulation, and because the liquid has different viscosities at the two temperatures, a liquid interface is produced between the two portions which interface is maintained during the vulcanizing of the insulation. During the vulcanizing of the insulation, a portion of the liquid in at least one section is removed and treated to remove vulcanization products.Type: GrantFiled: September 25, 1984Date of Patent: September 2, 1986Assignee: Societa' Cavi Pirelli S.p.A.Inventor: Marcello Sarracino
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Patent number: 4602121Abstract: An oil-filled electric cable in which the solid insulation is formed, at least in part, by separately applied, alternate layers of cellulose paper tape and of film tapes made of a plastic. Prior to application of the tapes around the cable conductor, the moisture content of the paper tape is selected and the swelling of the plastic tape by the oil after application is adjusted, if necessary, such as by immersing the plastic tape in the oil prior to application, so that the swelling of the plastic tape by the oil in the formed cable is offset by the shrinkage of the paper tape during drying of the cable. Also, apparatus for pre-swelling the plastic tape.Type: GrantFiled: January 11, 1985Date of Patent: July 22, 1986Assignee: Societa' Cavi Pirelli S.p.A.Inventor: Paolo G. Priaroggia
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Patent number: 4600806Abstract: An electric cable which is combustion resistant and which prevents the spreading of fire, the cable having insulated conductors and a sheath, the materials of the conductor insulation and the sheath being materials which emit low amounts of toxic gases and smoke when burned. The spaces between the insulated conductors and between such conductors and the sheath are filled with a filler constituted by, the sheath is made from or the sheath is covered with a layer of hydrated aluminum sulfate and a binder of elastomeric or plastomeric material.Type: GrantFiled: April 15, 1985Date of Patent: July 15, 1986Assignee: Societa' Cavi Pirelli, S.p.A.Inventor: Germano Beretta
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Patent number: 4596492Abstract: In laying an electric cable underwater, the finishing end of the cable is brought ashore by laying the cable end portion (from the cable laying ship) along a course parallel to the shore and as close to the shore as the ship can reach, then pulling the cable end to shore using a rope, pulling the cable end along the shore to the intended landing point, and then pulling the cable end in-land along the intended laying line until the whole cable is positioned along this line. Buoyancy devices are attached at intervals to the cable end portion for the duration of the landing process, to facilitate the sliding movement of the cable over the bottom.Type: GrantFiled: April 13, 1984Date of Patent: June 24, 1986Assignee: Societa' Cavi Pirelli, S.p.A.Inventors: Giuseppe Monti, Gianmario Lanfranconi
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Patent number: 4595167Abstract: The invention relates to an antivibration device particularly adapted for mounting motorcar engines, comprising a shaft (2) fixed to a base and supporting above it a metallic plate (3), fixing one extremity of a metallic container cylinder (4) inside which there is axially positioned a shaft (5) bearing the static work preload by means of a spacer spring (7) interposed between the plate (3) and a plate (6) held at one extremity of the same shaft (5), rigid revolving elements (9) being disposed between a viscoelastic material rolling race (10), preferably sheathing the shaft (5), and a metallic sliding race (8) consisting of a groove made in the inner wall of the container cylinder (4) in which the said rigid revolving elements are housed.Type: GrantFiled: April 5, 1984Date of Patent: June 17, 1986Assignee: Industrie Pirelli S.p.A.Inventors: Giorgio Tangorra, Edoardo Robecchi
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Patent number: 4595388Abstract: A belt for transmitting motion between two pulleys comprising an annular body of elastomeric material, at least a plurality of openings aligned in the longitudinal direction of the belt for engaging with corresponding protuberances on the pulleys, continuous elongated elements resistant to traction and directed in the longitudinal direction of the belt, and reinforcing elements directed along two directions, symmetrically inclined to each other with respect to the longitudinal direction of the belt.Type: GrantFiled: April 17, 1984Date of Patent: June 17, 1986Assignee: Industrie Pirelli S.p.A.Inventor: Giorgio Tangorra
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Patent number: 4583621Abstract: An oscillation damping device having a differentiated action in the two directions of sliding of a rigid stem with respect to a rigid case, comprising a plurality of rigid rolling elements, interposed between a rolling race of viscoelastic material and one or more skidding metallic races, shaped in such a way that upon moving the stem in one direction, the rolling elements are encased within said metallic races, spaced out from the viscoelastic race and exert a limited braking effect, while upon moving the stem in the opposite direction, the rolling elements are advanced into interference with the viscoelastic race and thereby exert a strong braking effect.Type: GrantFiled: March 19, 1984Date of Patent: April 22, 1986Assignee: Industrie Pirelli S.p.A.Inventor: Giorgio Tangorra
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Patent number: 4580002Abstract: Method and apparatus for replacing flammable, insulating oil in an oil-filled electric cable by non-flammable, insulating oil in which the flammable oil is withdrawn at least from the cable oil duct under vacuum and with heating of the cable to its maximum operating temperature and thereafter, the flammable oil which was withdrawn is replaced by non-flammable oil. During operation of the cable, oil which flows out of the cable during heating of the cable is sent to a first reservoir, through a check valve and during subsequent cooling, such oil is replaced by non-flammable oil from a second reservoir containing non-flammable oil and connected to the cable duct by a check valve. Also, an oil-filled cable having its insulation impregnated with flammable, insulating oil or a mixture of such oil with non-flammable, insulating oil and having an oil duct filled with a non-flammable, insulating oil which is different from the flammable oil.Type: GrantFiled: June 1, 1984Date of Patent: April 1, 1986Assignee: Societa Cavi Pirelli S.p.A.Inventors: Bernardino Vecellio, Gianmario Lanfranconi
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Patent number: 4573953Abstract: A continuous driving belt, adapted for transmitting movement between two elements, each one of which is rotatable around an axis and which is provided with pins projecting in the radial direction with respect to said axis, which are adapted for insertion into corresponding holes made in the belt itself. Said belt is constructed with a primary, deformable polymeric material having a Shore-A hardness greater than 75 degrees, and is provided with a reinforcing structure that comprises a plurality of annular elements which are embedded in said primary material and which are constructed out of a secondary material that presents an elongation substantially less than that of said primary material. The annular elements lie on planes that are substantially parallel to the longitudinal plane of the mid-plane of the belt itself.Type: GrantFiled: May 3, 1984Date of Patent: March 4, 1986Assignee: Industrie Pirelli S.p.A.Inventor: Giorgio Tangorra
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Patent number: 4571452Abstract: An electric cable sealing end in which the insulator which screws into a sealing box part and the box part distal end have rings therebetween with facing, complementary, engageable saw teeth. One ring is rotatable by the insulator and the other ring is held stationary by the box part. When the insulator is tightened, the saw teeth permit rotation thereof but after tightening, the saw teeth prevent rotation of the insulator in the loosening direction unless one of the rings is intentionally broken and removed.Type: GrantFiled: July 13, 1984Date of Patent: February 18, 1986Assignee: Societa' Cavi Pirelli S.p.A.Inventor: Giancarlo Giubileo
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Patent number: 4568144Abstract: Telecommunication elements each comprising one or more optical fibers surrounded by one or more layers of a plastic are wrapped with a non-metallic protective layer. The protective layer is enclosed by a metal tube which has at least portions which press into the protective layer so as to provide dimensional stability to the elements and protective layer within the tube. The metal tube may have a cylindrical inner wall or be a corrugated tube, and such tube protects the optical fibers with respect to electrical discharges.Type: GrantFiled: July 30, 1984Date of Patent: February 4, 1986Assignee: Societa' Cavi Pirelli S.p.A.Inventors: Elio Occhini, Sergio Longoni
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Patent number: 4568320Abstract: A driving belt pulley provided with dowels protruding in the radial direction with respect to its axis, and adapted for insertion into corresponding holes in the belt itself. The belt pulley comprises a supporting surface for the belt, the width of which--measured in the direction of said axis--is between two and four times the dimension of the root-section of one of said dowels measured in the direction of said axis, while the dimension of the root-section of each one of said dowels measured in the direction orthogonal to the previous one is between 3/10 and 8/10 of the distance between the axes of two of said contiguous dowels measured in respect of their root-section.Type: GrantFiled: May 15, 1984Date of Patent: February 4, 1986Assignee: Industrie Pirelli S.p.A.Inventor: Giorgio Tangorra
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Patent number: 4564055Abstract: A vulcanized molded tire, comprising a carcass of one or more plies of rubberized cord fabric, sidewalls, a tread band with shoulders at the joining points between said sidewalls and tread, and a breaker comprising a binding structure on each lateral portion inserted between the carcass and the tread band. The carcass plies have a profile in the cross-section comprising in each shoulder a curvilinear tract with the concavity faced towards the outside of the tire, disposed in underlying position with respect to the edges of said breaker and in correspondence with said binding structures.Type: GrantFiled: February 2, 1983Date of Patent: January 14, 1986Assignee: Societa Pneumatici Pirelli S.p.A.Inventor: Giuliano Ghilardi
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Patent number: 4556756Abstract: An electric power cable insulating fluid which is a substance corresponding to the following formula ##STR1## where R is chosen between the following two radicals: ##STR2## and an electric power cable with its insulation impregnated with such fluid.Type: GrantFiled: November 3, 1983Date of Patent: December 3, 1985Assignee: Societa' Cavi Pirelli S.p.A.Inventor: Bernardino Vecellio
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Patent number: 4553952Abstract: A toothed-belt and toothed-pulleys transmission including means for widening the teeth of the toothed-belt, said means corresponding to the top of each belt tooth and the base of each toothed-pulley groove.Type: GrantFiled: February 18, 1983Date of Patent: November 19, 1985Assignee: Industrie Pirelli S.p.A.Inventors: Giorgio Tangorra, Mario Cicognani, Vincenzo Macchiarulo
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Patent number: 4547175Abstract: An elastic joint for the transmission of motion between a driving shaft and a driven shaft, comprising in effect two tetrahedrons joined together along one edge.The two tetrahedrons are constituted by eight edges formed by flexible elements resistant to tensile stresses; the furthermost edges and the joining edge are formed of material resistant to compression stresses.Type: GrantFiled: January 16, 1984Date of Patent: October 15, 1985Assignee: Industrie Pirelli S.p.A.Inventors: Giorgio Tangorra, Edoardo Robecchi, Lino Magnabosco
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Patent number: 4543080Abstract: Belt for transmitting motion between two pulleys comprising a flat-shaped annular body of elastomeric material, reinforced with continuous and flexible elongated elements, resistant to traction and arranged in the longitudinal direction of the belt, a plurality of openings in the belt to engage with protuberances on the pulleys, at least one continuous reinforcing element disposed around the opening with ends anchored to the longitudinal elements.Type: GrantFiled: April 10, 1984Date of Patent: September 24, 1985Assignee: Industrie Pirelli S.p.A.Inventor: Giorgio Tangorra