Physical Structure Of Reinforcing Cords Patents (Class 152/556)
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Patent number: 11920295Abstract: Provided is an elastomer reinforcement cord in which the problem of stress concentration at an interface between an elastomer and a metal cord is solved and the durability is thereby improved. The elastomer reinforcement cord includes metal filaments (1a) and (1b), and a polymer material (3) having a melting point or softening point of 80° C. to 160° C. The elastomer reinforcement cord has a core (11) and at least one sheath layer (12). In a region surrounded by a line connecting the centers of the metal filaments constituting the outermost sheath layer at a cross-section in a direction orthogonal to an axial direction after vulcanization, when a region occupied by other than the metal filaments is defined as a gap region, the polymer material is contained in this gap region, and a filling rate, which is a ratio of the area of the polymer material, is higher than 120%, taking the area of the gap region as 100%.Type: GrantFiled: October 29, 2019Date of Patent: March 5, 2024Assignee: BRIDGESTONE CORPORATIONInventor: Takahisa Shizuku
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Patent number: 11787235Abstract: A tire with a radial carcass reinforcement, made up of at least one layer of metal reinforcing elements inserted between two skim layers of elastomer compound containing a reinforcing filler made up of at least carbon black. The tensile elastic modulus at 10% elongation of at least the skim layer closest to the internal cavity of at least the carcass reinforcement layer closest to the internal cavity is less than 8.5 MPa and at least the said skim layer closest to the internal cavity of at least the carcass reinforcement layer closest to the internal cavity has a macrodispersion value Z greater than 85.Type: GrantFiled: November 7, 2018Date of Patent: October 17, 2023Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: Nathalie Salgues, Auriane Frisch, Arnaud Gommez
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Patent number: 11135876Abstract: Provided is a pneumatic tire including a belt layer. When the tread region indicates a region corresponding to a belt width of the belt layer and the side region indicates a region inward of a tire radial direction with respect to a tire maximum width position, the carcass cords forming the carcass layer are inclined with respect to the tire radial direction in the tread region, and at the same time, extend along the tire radial direction in the side region. The carcass cords forming the carcass layer and belt cords forming the belt layer cross with each other in the tread region.Type: GrantFiled: May 12, 2017Date of Patent: October 5, 2021Inventors: Jun Matsuda, Yuji Satoh, Yuji Kodama
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Patent number: 11085560Abstract: A high pressure hose includes three or more reinforcing layers coaxially layered on one another between an inner surface layer and an outer surface layer coaxially layered on each other. An average braid angle obtained by averaging braid angles of the respective reinforcing layers is greater than or equal to 53.5° and less than or equal to 55.5°. The braid angles increase toward the reinforcing layer at an outermost circumference. Reinforcing wires constituting the reinforcing layer at an innermost circumference have elongation at break of greater than or equal to 3.0% and less than or equal to 4.0% and breaking strength of greater than or equal to 500 N. Reinforcing wires constituting the reinforcing layers other than the reinforcing layer at the innermost circumference have elongation at break of greater than or equal to 2.0% and less than 3.0% and breaking strength of greater than or equal to 500 N.Type: GrantFiled: March 22, 2018Date of Patent: August 10, 2021Assignee: The Yokohama Rubber Co., LTD.Inventor: Ikuma Yusa
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Patent number: 10968545Abstract: The present invention relates to a asymmetric cap ply reinforcement cord comprising yarns having yarns with two different linear density values in range of 1300-1500 dtex and 850-100 dtex in the cap ply reinforcement layer that is located between the tread and the belt package in a pneumatic radial vehicle tire comprising a tread and a belt package, and that is formed by winding spirally as strip comprising at least two cords such that it will make 0 to 5° angle with the equatorial plane on the said belt package.Type: GrantFiled: September 7, 2016Date of Patent: April 6, 2021Assignee: KORDSA TEKNIK TEKSTIL ANONIM SIRKETIInventors: Saadettin Fidan, Kursat Aksoy, Neslihan Gulbeycan
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Patent number: 10272628Abstract: A method for making a vehicle tire wherein the vehicle tire includes a belt having at least one belt layer made of parallel steel cords embedded in rubber. The belt ply is built up on a building drum in order to produce a tire blank. Upon completion of the tire blank, the tire blank is shaped and vulcanized in a vulcanizing press. The method includes applying the belt ply made of parallel, extensible steel cords embedded in rubber to a building drum to build up the belt. After the tire blank is completed, the tire blank is shaped and vulcanized in a vulcanizing press to reduce the extensibility of the steel cords.Type: GrantFiled: August 14, 2013Date of Patent: April 30, 2019Assignee: Continental Reifen Deutschland GmbHInventor: Theresia Becker
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Patent number: 10118523Abstract: A seatback frame includes: a body frame comprising a long fiber reinforced thermoplastic (LFT) composite material; and an inner frame comprising a continuous fiber reinforced thermoplastic (CFT) composite material buried in the body frame by insert injection-molding. A method for manufacturing the same, and a seatback for vehicles including the same are also disclosed.Type: GrantFiled: September 24, 2015Date of Patent: November 6, 2018Assignee: LG HAUSYS, LTD.Inventors: Kang-Hyun Song, Yong-Kil Kil, Tae-Hwa Lee, Kyung-Hoon Lee, Hee-June Kim
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Patent number: 10017011Abstract: Provided is a technique for attaining tire weight reduction while inhibiting occurrence of a product defect caused by deformation by improving the structure of a steel cord used for a carcass ply to improve the resistivity against deformation of a green tire when stored in an unvulcanized state. Also provided is a steel cord for reinforcing rubber articles with a multi-twisted structure in which a plurality of strands 11, 12 formed by twisting a plurality of wires 1, 2, 3 together in a layered-twisted structure are twisted together in a 2-layer-twisted structure. The cord mass is from 35 g/m to 65 g/m, and the ratio of flexural rigidity G (N·mm2) to cord cross section A (mm2), G/A (N) is from 400 N to 650 N.Type: GrantFiled: May 2, 2013Date of Patent: July 10, 2018Assignee: BRIDGESTONE CORPORATIONInventor: Yukimasa Fukuda
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Patent number: 9902203Abstract: A pneumatic commercial vehicle tire of radial design includes at least a three-ply belt, of which two belt plies are working plies and one radially outermost belt ply is a cover ply. Each of these belt plies includes reinforcements which are made of steel cord and which are embedded in elastomer. The steel cords of each of the three belt plies are coated with brass so as to provide for good elastomer adhesion. The brass coating of the reinforcement supports of the two working plies has a copper proportion of 60 wt. % to 65 wt. % and the brass coating of the reinforcement supports of the cover ply has a copper proportion of 66 wt. % to 70 wt. %.Type: GrantFiled: March 3, 2015Date of Patent: February 27, 2018Assignee: Continental Reifen Deutschland GmbHInventors: Joern Krueger, Carole Justine, Thomas Kramer, Volkmar Fries
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Patent number: 9738122Abstract: An information acquisition device is provided within a virtual plane including a coil axis of a coil-shaped antenna and having a perpendicular line orthogonal to an axis of rotation of a tire, such that the angle formed by the coil axis of the antenna relative to the tire rotational axis is within a range of 0° to 40°. The amount of attenuation of radio waves emitted from the antenna to the exterior of the tire is thereby reduced.Type: GrantFiled: November 29, 2011Date of Patent: August 22, 2017Assignee: THE YOKOHAMA RUBBER CO., LTD.Inventors: Koji Nakatani, Yoshihide Yamada, Naobumi Michishita
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Patent number: 9290055Abstract: A tire having a radial carcass reinforcement, having at least one layer of reinforcing elements, said tire comprising a crown reinforcement, which is itself covered radially with a tread, said tread being joined to two beads via two sidewalls, wherein at least 90% of the reinforcing elements of at least one layer of the carcass reinforcement are non-wrapped metal cords having in what is called the permeability test a flow rate of less than 20 cm3/min, wherein at least 1% of the reinforcing elements of said at least one layer of the carcass reinforcement are capillary tubes and wherein, in a plane of section perpendicular to the axis of the capillary tube, the ratio of the open area to the area of material is greater than 0.4%.Type: GrantFiled: November 29, 2010Date of Patent: March 22, 2016Assignees: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Michelin Recherche et Technique S.A.Inventor: Alain Domingo
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Patent number: 9278495Abstract: A reinforced rubber article containing a rubber article and a fibrous layer embedded into the rubber article. The fibrous layer contains monoaxially drawn tape elements having a rectangular cross-section and at least a first layer having a draw ratio of at least about 5, a modulus of at least about 2 GPa, a density of at least 0.85 g/cm3. The first layer contains a polymer selected from the group consisting of polyamide, polyester, and co-polymers thereof. Methods of forming the reinforced rubber article are also disclosed.Type: GrantFiled: August 3, 2011Date of Patent: March 8, 2016Assignee: Milliken & CompanyInventors: Sujith Nair, Padmakumar Puthillath, Johann Peschek, Charles W. Prestridge
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Patent number: 9267566Abstract: A reinforced rubber article containing a rubber article and a fibrous layer embedded into the rubber article. The fibrous layer contains monoaxially drawn tape elements having at least a first layer, an upper surface and a lower surface. The first layer comprises a blend of polyester and nylon 6. Methods of forming the reinforced rubber article are also disclosed.Type: GrantFiled: January 17, 2012Date of Patent: February 23, 2016Assignee: Milliken & CompanyInventors: Sujith Nair, Charles W. Prestridge, Joseph R. Royer, Ines El-Majid, Johann Peschek
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Patent number: 9259373Abstract: A compression garment comprises a plurality of longitudinal wales arranged to form a fabric having a length and generally parallel to the length, and a plurality of secondary transverse elastomeric threads connecting adjacent longitudinal wales and equally spaced about a length of the longitudinal wales. In a stretched state, the longitudinal wales are spaced from one another and remain generally parallel to the length.Type: GrantFiled: February 3, 2014Date of Patent: February 16, 2016Inventor: Martin Winkler
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Publication number: 20150129101Abstract: An object of the present invention aims to provide a cord formed by twisting purified polysaccharide fibers which are manufactured by using a raw material with a low environmental impact and do not emit carbon disulfide, in which the cord is able to confer durability and resistance to external damage to a tire when the cord is used in the tire. A cord is provided formed by bringing a polysaccharide solution which is formed by dissolving a polysaccharide raw material in a liquid including an ionic liquid in contact with a solidifying liquid, and by twisting raw yarn which is purified polysaccharide fibers formed by spinning polysaccharides, in which a relationship between tenacity TB (cN/dtex) of the raw yarn at 25° C. and elongation at break EB (%) of the raw yarn at 25° C. satisfies the following expression (1) and the following expression (2), and a twisted yarn tenacity utilization rate (CT/TB) at the time of setting cord tenacity at 25° C.Type: ApplicationFiled: May 21, 2013Publication date: May 14, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Mitsuharu Koide, Kenichi Sugimoto
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Publication number: 20150122395Abstract: A tyre for motorcycles includes a carcass structure, a belt structure arranged in a radially outer position with respect to the carcass structure and a tread band arranged in a radially outer position with respect to the belt structure. The belt structure is of the zero degree type and includes at least one reinforcing cord including a core made of non metal material, and a plurality of metal wires substantially parallel to one another and helically wound around the core with a predetermined winding pitch. The metal wires are in such a number as to not completely surround the core. In particular, the metal wires are arranged around the core so that, in any cross-section of the reinforcing cord, they are located at just an angular portion of an ideal circumference that circumscribes the core.Type: ApplicationFiled: December 21, 2012Publication date: May 7, 2015Inventors: Pierangelo Misani, Mario Mariani, Guido Luigi Daghini, Stefano Tresoldi, Omar Ballabio, Simone Agresti
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Publication number: 20150114541Abstract: A tire with a radial carcass reinforcement, wherein the reinforcing elements of at least one layer of the carcass reinforcement are non-wrapped three-layered metal cords with an unsaturated external layer which in what is referred to as the permeability test return a mean flow rate less than 4 cm3/min and at least 2 points of zero flow rate over a length of 2 cm.Type: ApplicationFiled: April 2, 2013Publication date: April 30, 2015Applicants: MICHELIN RECHERCHE ET TECHNIQUE, S.A., COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: Philippe Johnson, Sebastien Noel
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Publication number: 20150096658Abstract: A tire with a radial carcass reinforcement, wherein the ratio of the axial width L of the tread to the maximum axial width S of the tire is strictly greater than 0.85 and the reinforcing elements of at least one layer of the carcass reinforcement are non-wrapped metal cords with saturated layers, at least one inner layer being sheathed with a layer made up of a polymeric composition such as a composition of non-crosslinkable, crosslinkable or crosslinked rubber, preferably based on at least one diene elastomer.Type: ApplicationFiled: April 2, 2013Publication date: April 9, 2015Applicants: MICHELIN RECHERCHE ET TECHNIQUE, S.A., COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: Philippe Johnson, Julien Metzger, Sébastien Noel
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Publication number: 20150059954Abstract: A pneumatic tire includes a pair of axially spaced apart annular bead structures, a carcass structure wrapped around each bead structure and having a pair of carcass turnups substantially contiguous with the carcass structure from the bead structure to radially outer ends of the pair of carcass turnups, a belt structure disposed radially outward of the carcass structure in a crown area of the pneumatic tire, an overlay structure disposed radially outward of the belt structure, and a component comprising a non-adhesive core structure and a coating applied to the core structure with the coating providing adhesion to a surrounding matrix for the core structure.Type: ApplicationFiled: August 27, 2013Publication date: March 5, 2015Applicant: The Goodyear Tire & Rubber CompanyInventors: Robert Edward Lionetti, Olivier Marcel Eugene Durand, John Woods, Raphael Beck
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Patent number: 8925605Abstract: Provided is a run-flat tire in which a side-reinforcing rubber is arranged on the inside of the carcass in the tire width direction on both sidewall portions. The carcass plies include cords made of a material having a heat shrinkage rate of 2% to 8% at 177° C., and the run-flat tire further includes a reinforcing cord layer which includes cords made of a material having a heat shrinkage rate of less than 2% at 177° C., the reinforcing cord layer being arranged on the outside of the side-reinforcing rubber in the tire width direction on both sidewall portions.Type: GrantFiled: August 25, 2010Date of Patent: January 6, 2015Assignee: Bridgestone CorporationInventor: Daisuke Maehara
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Publication number: 20140374009Abstract: A method forms an adhesion joint between a cord and a rubber matrix. The method includes the steps of: providing a cord having an initial relatively smooth surface; texturing the smooth surface such that the resulting surface is rougher than the initial surface of the cord; depositing a uniform polymer coating on to the textured surface of the cord by plasma polymerization of an organic precursor and an air plasma; and inserting the cord into a rubber matrix such that the resulting surface provides enhanced adhesion to the rubber matrix compared to the adhesion of the initial surface to the rubber matrix or adhesion of the textured surface to rubber matrix.Type: ApplicationFiled: June 20, 2013Publication date: December 25, 2014Inventors: Samy Laroussi Mzabi, Frederic Gerard Auguste Siffer, Gilles Joseph Henri Bertemes, Claude Ernest Felix Boes, James Gregory Gillick
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Publication number: 20140360648Abstract: A pneumatic tire includes a single carcass ply and at least one belt ply disposed radially outward of the carcass ply in a crown portion of the pneumatic tire. The carcass ply includes only one type of composite cord. The cord consists of one single aramid first yarn twisted helically about one single polyester second yarn. The first yarn and the second yarn have a different moduli of elasticity. The first yarn has a modulus greater than the modulus of the second yarn.Type: ApplicationFiled: June 7, 2013Publication date: December 11, 2014Applicant: E. I. Dupont de Nemours and CompanyInventors: Mahmoud Cherif Assaad, Walter Kevin Westgate, Ralph Joachim Olbrich, Daniel Mayer, John Woods, Nathan Whitney Love, Andreas Renken
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Publication number: 20140360644Abstract: An object of the present invention is to provide a reinforcement member for a tire, which is capable of mitigating stress concentration at respective end portions in the cord extending direction thereof in a satisfactory manner when the reinforcement member is subjected to tensile force. Specifically, the present invention provides a reinforcement member for a tire, constituted of a plurality of cords aligned in parallel to each other and coating rubber provided thereon, characterized in that: each of the cords is constituted of a plurality of filaments; each cord has the cord center portion formed by the intertwined filaments and respective cord end portions positioned at respective sides in the cord extending direction of the cord center portion; and at least one of the cord end portions is constituted of a plurality of the filaments each formed in a wavy or spiral shape and extending separately in an unraveled manner.Type: ApplicationFiled: January 24, 2013Publication date: December 11, 2014Applicant: BRIDGESTONE CORPORATIONInventor: Toshiya Miyazono
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Publication number: 20140352865Abstract: A tire having a radial carcass reinforcement, composed of at least one layer of metal reinforcing elements, the said tire comprising a crown reinforcement, itself topped radially by a tread, the said tread being joined to two beads via two sidewalls. The metal reinforcing elements of at least one layer of the carcass reinforcement are cords exhibiting, in the “permeability” test, a flow rate of less than 20 cm3/min and at least one layer of the carcass reinforcement is provided, on at least one face, with textile threads and at least the layer of elastomeric mixture, axially in contact with the end of at least the radially innermost crown reinforcement layer and in contact with the carcass reinforcement, is an elastomeric mixture based on natural rubber or on synthetic polyisoprene and on a reinforcing filler conferring high cohesion.Type: ApplicationFiled: December 18, 2012Publication date: December 4, 2014Applicants: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, MICHELIN RECHERCHE ET TECHNIQUE S.A.Inventors: Charlotte Caffeau, Sébastien Noel, Jacques Besson
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Publication number: 20140338811Abstract: A tire having a radial carcass reinforcement, composed of at least one layer of metal reinforcing elements, the said tire comprising a crown reinforcement, itself topped radially by a tread, the said tread being joined to two beads via two sidewalls. The metal reinforcing elements of at least one layer of the carcass reinforcement are cords exhibiting, in the “permeability” test, a flow rate of less than 20 cm3/min and at least one layer of the carcass reinforcement is provided, on at least one face, with textile threads and at least the layer of elastomeric mixture, radially external to the bead wire and in contact with the latter, is an elastomeric mixture based on natural rubber or on synthetic polyisoprene and on a reinforcing filler conferring high cohesion.Type: ApplicationFiled: December 18, 2012Publication date: November 20, 2014Applicants: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, MICHELIN RECHERCHE TECHNIQUE S.A.Inventors: Charlotte Caffeau, Sébastien Noel, Nathalie Salgues, Patricia Lagarde
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Patent number: 8869851Abstract: A metal cord (C-1) having two layers (Ci, Ce) of 3+N construction, rubberized in situ, comprising an inner layer (Ci) formed from three core wires (10) of diameter d1 wound together in a helix with a pitch p1 and an outer layer (Ce) of N wires (11) N varying from 6 to 12, of diameter d2, which are wound together in a helix with a pitch p2 around the inner layer (Ci), said cord being characterized in that it has the following characteristics (d1, d2, p1 and p2 being in mm): 0.08<d1<0.30; 0.08<d2?0.20; p1/p2?1; 3<p1<30; 6<p2<30; the inner layer is sheathed with a diene rubber composition called a “filling rubber” (12) which, for any length of cord of 2 cm or more, is present in the central channel (13) formed by the three core wires and in each of the gaps lying between the three core wires (10) and the N wires (11) of the outer layer (Ce); the content of filling rubber in the cord is between 5 and 35 mg per g of cord.Type: GrantFiled: July 23, 2009Date of Patent: October 28, 2014Assignees: Michelin Recherche et Techniques S.A., Compagnie Generale des Etablissements MichelinInventors: Thibaud Pottier, Henri Barguet
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Patent number: 8863801Abstract: There is provided a pneumatic radial tire having favorable steering stability required as a high performance radial tire designed for high performance cars, durability and good cost performance. The pneumatic radial tire is framed by a carcass 1 toroidally extending between a pair of bead portions 11 and has at least two layers of crossing belt layers 2 (2a, 2b) formed by rubberizing steel cords and disposed around an outside of a crown portion thereof in a radial direction. The steel cord has a single strand structure or a core-single layer sheath structure composed of six to ten steel wires of 0.10 to 0.20 mm in diameter, a number of driven steel cords is 40 cords/50 mm or more and a distance between the adjacent steel cords within the belt layer is 0.3 mm or more.Type: GrantFiled: September 8, 2006Date of Patent: October 21, 2014Assignee: Bridgestone CorporationInventor: Hideyuki Chiashi
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Patent number: 8794283Abstract: A run-flat tire is provided with a reinforcing cord layer adjoining the radial carcass at least from the belt end to the maximum width portion of the tire side portion; the cord constituting the reinforcing cord layer is nylon 66 cord, cellulose fiber cord, PET cord, PEN cord or aramid/nylon 66 hybrid cord, and has a cord angle of less than 10° with respect to the tire radius direction; and the elastic modulus of the cord pulled out from the tire at a temperature of 25° C. under the conditions of a load of 3 N is not higher than 40 cN/dtex, and the thermal shrinkage stress ? (cN/dtex) at a temperature of 177° C. and the elastic modulus E (cN/dtex) at a temperature of 177° C. under the conditions of a load of 10 N satisfy the following conditions: ?+0.025E?0.36, 40?E?8, and ??0.05.Type: GrantFiled: October 5, 2010Date of Patent: August 5, 2014Assignee: Bridgestone CorporationInventor: Hiroyuki Mori
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Patent number: 8776848Abstract: A tire for a motorized two-wheeled vehicle, comprising a carcass-type reinforcing structure formed of at least two layers of reinforcing elements, and comprising underneath the tread a crown reinforcement structure comprising at least one layer of reinforcing elements. At least the tread surface comprises a first polymeric compound extending in at least the region of the equatorial plane and at least one second polymeric compound having physicochemical properties different from those of said first polymeric compound, the reinforcing elements of said two or more layers forming the carcass-type reinforcing structure forming angles with the circumferential direction of between 70° and 85° and the distance between the reinforcing elements of each of said two or more layers forming the carcass-type reinforcing structure being not more than 0.5 mm across at least 60% of the axial width of at least one region composed of the second polymeric compound.Type: GrantFiled: March 7, 2011Date of Patent: July 15, 2014Assignees: Michelin Recherche et Techniques S.A., Compagnie Generale des Etablissements MichelinInventors: Jean-Marc Ruffenach, Alain Valle, Luc Bestgen, Pascal Prost
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Patent number: 8752602Abstract: The present invention provides an aircraft tire having a carcass structure capable of sufficiently satisfying recent demands for high pressure resistance without increase in tire weight. An aircraft tire 9 includes a pair of bead portions 2 and a carcass 4 made by stacking two or more carcass layers 3 composed of cords coated with rubber, which toroidally extend between the bead portions 2. Further, with respect to carcass layers 3 of the carcass 4 which are adjacent to each other, elongation at break of a widthwise outer carcass layer 3 is smaller than elongation at break of a widthwise inner carcass layer 3.Type: GrantFiled: April 22, 2010Date of Patent: June 17, 2014Assignee: Bridgestone CorporationInventor: Daisuke Itami
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Publication number: 20140110035Abstract: Provided is a pneumatic tire in which basic performances needed for a side portion can be satisfied without compromising a light weight effect due to decrease in the gauge of the side portion. Provided is a pneumatic tire which is composed of a pair of bead portions 11, a pair of side wall portions 12 extending from the pair of bead portions, and a tread portion 13 bridging both side wall portions and which comprises one or more carcasses 2 extending toroidally between the pair of bead portions.Type: ApplicationFiled: June 13, 2012Publication date: April 24, 2014Applicant: BRIDGESTONE CORPORATIONInventor: Takuya Yoshimi
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Publication number: 20140069563Abstract: Aramid/polyketone composite textile cord comprising at least one aramid multifilament strand and at least one polyketone multifilament strand that are twisted together, the constituent individual filaments of the aramid multifilament strand being twisted according to a twist factor K1 and the constituent individual filaments of the polyketone multifilament strand being twisted according to a twist factor K2, characterized in that in said cord: the aramid/polyketone weight ratio is greater than 1.5; the K2/K1 ratio is greater than 1.10. This textile cord can advantageously be used as a reinforcer in tyres, in particular in the belt or in the carcass reinforcement of these tyres.Type: ApplicationFiled: April 25, 2012Publication date: March 13, 2014Applicants: MICHELIN RECHERCHE ET TECHNIQUE S.A., COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventor: Christophe Le Clerc
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Publication number: 20140041779Abstract: The pneumatic tire according to the present technology has a reinforcing layer in which a plurality of steel cords is laid in parallel and embedded in rubber, wherein each steel cord is configured from a plurality of wires twisted together, the wire diameter is from 0.15 mm to 0.40 mm, each wire is configured from a core and a plating layer formed on the periphery of the core, the core is made from carbon steel with a carbon content of from 0.60 mass % to 0.75 mass %, the average thickness of the plating layer is from 0.23 ?m to 0.33 ?m, and the strength of the steel cord is from 3000 MPA to 3500 MPa.Type: ApplicationFiled: April 11, 2012Publication date: February 13, 2014Applicant: The Yokohama Rubber Co., LTD.Inventors: Yoshio Ueda, Hiroshi Kakizawa
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Publication number: 20140020809Abstract: Provided is a tire whose durability is improved by using, as a reinforcing member, a polyester cord having an improved heat resistant adhesive property to rubber. Provided is a tire in which a rubber-cord complex composed of a polyester cord and a rubber is used as a reinforcing member. The polyester cord is formed by twisting polyester filaments, and then subjecting the twisted filaments to an adhesive agent treatment. The polyester filament is made of a polyester fiber which is composed of a polyester having ethylene terephthalate as a main repeating unit and having an intrinsic viscosity of 0.85 or higher, wherein the amount of terminal carboxy group in the fiber is 20 equivalent/ton or larger, the long period according to small-angle X-ray diffraction is 9 to 12 nm, and a surface treatment agent having an epoxy group is attached to the surface of the fiber.Type: ApplicationFiled: March 30, 2012Publication date: January 23, 2014Applicant: BRIDGESTONE CORPORATIONInventors: Hiroyuki Yokokura, Daisuke Ozaki, Shintaro Shimada, Fuyuki Terasaka
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Patent number: 8622107Abstract: The heat resistance of carcass cords is enhanced, whereby the runflat durability is enhanced. A pneumatic tire has a carcass 6 and a tread-reinforcing cord layer 7 disposed radially outward of the carcass, the carcass 6 comprising a carcass ply 6A in which carcass cords 20 of aramid fiber are arranged at an angle of 45 to 90° with respect to the tire circumferential direction and are covered with a topping rubber, preferable carcass cords 20 have a two-bundle twisted structure that two bundles of first-twisted filaments are subjected to final twist, and preferable carcass cords 20 have a twist factor T of 0.5 to 0.7 represented by the equation (1): T=N×?{square root over ({(0.125×D/2)/?})}×10?3??(1) in which N is the number of final twists per 10 cm, D is a total nominal dtex (fineness) of a cord, and ? is a specific gravity of a cord material.Type: GrantFiled: May 27, 2008Date of Patent: January 7, 2014Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Shinichi Miyazaki
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Publication number: 20130263994Abstract: Provide is a pneumatic radial tire having excellent durability and lightweight properties without compromising rigidity. A pneumatic radial tire comprises: a carcass composed of at least one carcass layer extending toroidally between a left-and-right pair of bead cores; a tread portion which is arranged on the outside in the tire radial direction of a crown region of the carcass to form a ground contacting portion; and a belt composed of two belt layers which is arranged between the tread portion and the crown region of the carcass to form a reinforcing portion. A reinforcing material constituting the belt layer is a bundle 6 formed by arranging two cords in pairs; and, letting the diameter of a filament 7 constituting the cord a (mm), the interval between the adjacent bundles 6 as an expected value is increased by a/4 (mm) or larger compared to the interval represented by using the circumcircle of the cord.Type: ApplicationFiled: December 19, 2011Publication date: October 10, 2013Applicant: BRIDGESTONE CORPORATIONInventor: Keisuke Nakamura
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Patent number: 8539999Abstract: The present invention relates to a pneumatic tire having a pair of spaced apart bead components, a connecting carcass between said bead components, and a rubber chafer positioned around at least a portion of each of said bead components and intended for contacting a rigid rim of a wheel, wherein said chafer comprises an outer skin layer intended for contacting the rigid rim and an inner core layer disposed radially inward of the skin layer.Type: GrantFiled: December 16, 2008Date of Patent: September 24, 2013Assignee: The Goodyear Tire & Rubber CompanyInventors: Matthieu Pingenat, Filomeno Gennaro Corvasce, Massimo Di Giacomo Russo, Isabelle Lea Louise Marie Lambert, Pierre Bernard Raoul Brochet
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Publication number: 20130206302Abstract: The present invention provides a pneumatic tire by which workability when molding a tire and tire durability performance can be enhanced without increasing tire weight when providing a reinforcing layer formed by aligning a plurality of monofilament steel wires and embedding this plurality of monofilament steel wires in rubber. The pneumatic tire of the present invention includes a reinforcing layer formed by aligning a plurality of monofilament steel wires and embedding said monofilament steel wires in rubber. Each of the monofilament steel wires is provided with twisting around an axis thereof, and a wire surface twisting angle ? with respect to an axial direction of the monofilament steel wires is not less than 1°.Type: ApplicationFiled: June 6, 2011Publication date: August 15, 2013Applicant: THE YOKOHAMA RUBBER CO., LTD.Inventors: Kaoru Yasuda, Yoshio Ueda
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Publication number: 20130199691Abstract: The invention relates to a tire with a radial carcass reinforcement comprising a crown reinforcement, itself radially capped with a tread, the said tread being connected to two beads via two sidewalls. According to the invention, the crown reinforcement comprises at least one axially continuous layer consisting of at least two bands arranged in contact with one another in the axial direction and each formed of at least one multilayer laminate, the lateral edges of the said at least two bands being oriented substantially circumferentially, the width of the said at least one axially continuous layer being greater than half the width of the tread and each laminate comprising at least one multiaxially stretched thermoplastic polymer film positioned between and in contact with two layers of rubber composition.Type: ApplicationFiled: September 20, 2011Publication date: August 8, 2013Inventor: Laurent Cercy
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Publication number: 20130186543Abstract: The invention relates to a tyre comprising at least two working layers (41, 43) and at least one layer of circumferential metal reinforcing elements (42). According to the invention, the layer of circumferential reinforcing elements consists of at least one central part (422) and two axially external parts (421), the reinforcing elements of the central part of at least one layer of circumferential reinforcing elements being reinforcing elements cut so as to form sections (6), the length of the sections being less than 550 mm, the distance (d) between the ends of two consecutive sections being greater than 25 mm, the length of the sections being between 1.1 and 13 times the distance between the ends of two consecutive sections and the reinforcing elements of the two axially external parts (421) being continuous.Type: ApplicationFiled: December 9, 2010Publication date: July 25, 2013Applicants: Michelin Recherche et Technique S.A., COMPAGNIE GENERALE DES ESTABLISSEMENTS MICHELINInventor: Jean-Marc Viller
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Publication number: 20130133804Abstract: A method forms an adhesion joint between a cord and a rubber matrix. The method includes the steps of providing a cord having an initial relatively smooth surface, texturing the smooth surface such that the resulting surface is rougher than the initial surface of the cord, and inserting the cord into a rubber matrix such that the resulting surface provides enhanced adhesion to the rubber matrix compared to the adhesion of the initial surface to the rubber matrix.Type: ApplicationFiled: November 29, 2011Publication date: May 30, 2013Inventors: Samy Laroussi Mzabi, Claude Ernest Felix Boes, Gilles Joseph Henri Bertemes, Etienne Besnoin, Patrick François Willems
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Patent number: 8403014Abstract: A motorcycle tire for uneven terrain travel including two carcass plies, at least one of which is aramid ply 16 using aramid fiber cord 17 obtained by subjecting N (2 to 4) bundles 18 of aramid fiber “f” to final twist, the aramid fiber cord 17 having a total fineness D of 2,200 to 5,010 dtex and a twist factor T represented by the equation (1): T=n×(?{square root over (D)})×10?3??(1) in which n is the number of final twists per 10 cm of the cord (unit: time), and D is a total fineness of the cord (unit: dtex), the twist factor falling within the range of: in the case where the aramid ply 16 is inner carcass ply 6A, from 2.8 to 3.2 when the number of filament bundles 18 is 2, and from 2.4 to 3.2 when the number of filament bundles 18 is 3 or 4, and in the case where the aramid ply 16 is outer carcass ply 6B, from 2.4 to 3.2 when the number of filament bundles 18 is 2, and from 2.2 to 3.2 when the number of filament bundles 18 is 3 or 4.Type: GrantFiled: May 16, 2008Date of Patent: March 26, 2013Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Toru Fukumoto
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Patent number: 8381781Abstract: The pneumatic tire of the present invention, in which a tread rubber, a sidewall rubber, and a breaker rubber each have an intrinsic volume resistivity of 1×108 ?·cm or more, a clinch rubber and a chafer rubber each have an intrinsic volume resistivity of 1×108 ?·cm or less, wherein the pneumatic tire has a first conductive layer that is disposed between a carcass ply, an edge portion of the breaker rubber and the sidewall portion, a second conductive layer that is in contact with the first conductive layer and is disposed between the tread rubber and the carcass, and a pen rubber layer that extends from the second conductive layer to a surface of the tread portion, wherein the first conductive layer, the second conductive layer, and the pen rubber layer each have an intrinsic volume resistivity of 1×108 ?·cm or less, the carcass ply contains a conductive fibrous material having an intrinsic volume resistivity of 1×108 ?·cm or less and has a structure that the carcass ply is in contact with the clinch portionType: GrantFiled: August 4, 2008Date of Patent: February 26, 2013Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Shinichi Miyazaki
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Publication number: 20130034718Abstract: A reinforced rubber article containing a rubber article and a fibrous layer embedded into the rubber article. The fibrous layer contains monoaxially drawn tape elements having a rectangular cross-section and at least a first layer having a draw ratio of at least about 5, a modulus of at least about 2 GPa, a density of at least 0.85 g/cm3. The first layer contains a polymer selected from the group consisting of polyamide, polyester, and co-polymers thereof. Methods of forming the reinforced rubber article are also disclosed.Type: ApplicationFiled: August 3, 2011Publication date: February 7, 2013Inventors: Sujith Nair, Padmakumar Puthillath, Johann Peschek, Charles W. Prestridge
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Publication number: 20130025763Abstract: Disclosed is a pneumatic tire comprising (A) reinforcing layer comprising a plurality of reinforcing cords or wires coated with a rubber composition, wherein (B) a film layer, (C) an elastomer layer, and (D) a film layer comprising ethylene-vinyl alcohol copolymer are sequentially laminated on the tire inner surface side of reinforcing layer (A), and the product of Young's modulus Eb (MPa) and thickness Gb (mm) of film layer (B) is equal to or more than 5 kN/m, wherein the reinforcing layer having improved durability.Type: ApplicationFiled: June 16, 2011Publication date: January 31, 2013Applicant: The Yokohama Rubber Co., Ltd.Inventors: Toyoaki Endo, Yoshiaki Hashimura
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Publication number: 20120318428Abstract: A tire having a radial carcass reinforcement, including at least one layer of reinforcing elements, said tire comprising a crown reinforcement, which is itself covered radially with a tread, said tread being joined to two beads via two sidewalls, wherein at least 85% of the reinforcing elements of at least one layer of the carcass reinforcement are non-wrapped metal cords having in what is called the permeability test a flow rate of less than 20 cm3/min, and in that at least 5% of the reinforcing elements of said at least one layer of the carcass reinforcement are cords comprising at least one strand consisting of textile multifilament yarns.Type: ApplicationFiled: November 29, 2010Publication date: December 20, 2012Applicants: Michelin Recherche et Technique S.A., COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventor: Alain Domingo
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Publication number: 20120312443Abstract: A tire having a radial carcass reinforcement, having at least one layer of reinforcing elements, said tire comprising a crown reinforcement, which is itself covered radially with a tread, said tread being joined to two beads via two sidewalls, wherein at least 90% of the reinforcing elements of at least one layer of the carcass reinforcement are non-wrapped metal cords having in what is called the permeability test a flow rate of less than 20 cm3/min, wherein at least 1% of the reinforcing elements of said at least one layer of the carcass reinforcement are capillary tubes and wherein, in a plane of section perpendicular to the axis of the capillary tube, the ratio of the open area to the area of material is greater than 0.4%.Type: ApplicationFiled: November 29, 2010Publication date: December 13, 2012Inventor: Alain Domingo
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Publication number: 20120312444Abstract: A tire having a radial carcass reinforcement, including at least one layer of reinforcing elements, said tire comprising a crown reinforcement, which is itself covered radially with a tread, said tread being joined to two beads via two sidewalls. The reinforcing elements of at least one layer of the carcass reinforcement are hybrid cords having at least two layers. At least one strand of the core of each of said hybrid cords includes textile multifilament yarns. The strands of the intermediate and/or outer layers are metallic, and at least one inner layer is sheathed with a layer including a polymeric composition such as a crosslinkable or crosslinked rubber composition.Type: ApplicationFiled: November 29, 2010Publication date: December 13, 2012Applicant: Com[agnie Generale Des Etablissements MichelinInventor: Alain Domingo
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Publication number: 20120298280Abstract: The invention relates to a tire having a radial carcass reinforcement, consisting of at least one layer of metal reinforcing elements, said tire including a top reinforcement, which is covered radially with a tread, said tread being joined to two beads via two sidewalls. According to the invention, the reinforcing elements of at least one carcass reinforcement layer are metal cables which, in the so-called permeability test, have a flow rate less than 20 cm3/mn and at least 10% of said metal cables are banded by a strand consisting of multifilament textile fibers.Type: ApplicationFiled: November 29, 2010Publication date: November 29, 2012Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventor: Alain Domingo
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Publication number: 20120298281Abstract: The present invention relates to a three-layered metal cable of construction L+M+N usable as a reinforcing element for a tire carcass reinforcement, comprising an inner layer C1 having L wires of diameter d1 with L being from 1 to 4, surrounded by an intermediate layer C2 of M wires of diameter d2 wound together in a helix at a pitch p2 with M being from 3 to 12, said layer C2 being surrounded by an outer layer C3 of N wires of diameter d3 wound together in a helix at a pitch p3 with N being from 8 to 20, said cable being characterised in that a sheath formed of a cross-linkable or cross-linked rubber composition based on at least one diene elastomer covers at least said layer C2. The invention furthermore relates to the articles or semi-finished products made of plastics material and/or rubber which are reinforced by such a multi-layer cable, in particular to tires used in industrial vehicles, more particularly heavy-vehicle tires and their carcass reinforcement plies.Type: ApplicationFiled: July 17, 2012Publication date: November 29, 2012Applicant: MICHELIN RECHERCHE ET TECHNIQUE S.A.Inventors: Henri Barguet, Alain Domingo, Arnaud Letocart, Thibaud Pottier