Reinforcing Or Tire Cords Patents (Class 57/902)
  • Patent number: 9004128
    Abstract: Without decreasing the strength in the axial direction of the cord, and without increasing the thickness in the radial direction, a steel cord for reinforcing a rubber article, which improves durability against cut, as well as a construction vehicle tire utilizing the steel cord for reinforcing a rubber article as a reinforcing material is provided. A steel cord for reinforcing a rubber article is formed by twisting a plurality of sheath strands 2 formed by twisting a plurality of wires around a core strand 1 formed by twisting a plurality of wires, wherein the core strand 1 is constituted of a 4-layer-twisted structure and the diameter of the steel cord is 5 mm or larger.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: April 14, 2015
    Assignee: Bridgestone Corporation
    Inventor: Keisuke Nakamura
  • Patent number: 8991457
    Abstract: A steel cord for reinforcement of rubber articles, whose cord strength is enhanced by preventing occurrence of preceding break of the outermost layer filaments in the steel cord having a multi-twisted structure, and a pneumatic tire using it as a reinforcing material are provided. In a steel cord for reinforcement of rubber articles having a multi-twisted structure in which a plurality of strands are twisted together, which strands have a layered twisted structure in which a plurality of steel filaments are twisted together, dc/ds, which represents the ratio between dc, the diameter of outermost layer sheath filaments constituting the outermost layer sheath of a core strand, and ds, the diameter of outermost layer sheath filaments constituting the outermost layer sheath of sheath strands, is 1.05 to 1.25.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: March 31, 2015
    Assignee: Bridgestone Corporation
    Inventor: Eiji Kudo
  • Patent number: 8869851
    Abstract: 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: Grant
    Filed: July 23, 2009
    Date of Patent: October 28, 2014
    Assignees: Michelin Recherche et Techniques S.A., Compagnie Generale des Etablissements Michelin
    Inventors: Thibaud Pottier, Henri Barguet
  • Patent number: 8833414
    Abstract: Provided is a steel cord for reinforcing a rubber article, which has an improved durability against so-called cuts, such as notches and perforations, which are generated in the case of treading on an obtusely or sharply pointed projection, without decreasing the strength in the axial direction of the cord, and without increasing the thickness in the radial direction, namely without increasing the weight of a tire, as well as a tire using the steel cord for reinforcing a rubber article as a reinforcing material, especially a construction vehicle tire. Also provided is a steel cord for reinforcing rubber articles with a multi-twisted structure formed by twisting a plurality of sheath strands formed by twisting a plurality of wires around a core strand formed by twisting a plurality of wires, and the core strand being constituted of an at least three-layer-twisted structure formed by twisting core filaments and sheath filaments.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: September 16, 2014
    Assignee: Bridgestone Corporation
    Inventors: Hideki Masubuchi, Keisuke Nakamura
  • Patent number: 8479792
    Abstract: A motorcycle tire comprises: a toroidal carcass comprising two carcass plies of cords arranged at an angle of from 20 to 80 degrees with respect to the tire circumferential direction; and a band comprising at least one ply of at least one helically wound cord disposed radially outside the carcass. The band cord is made of steel filaments of 0.08 to 0.20 mm diameter twisted together into a L×M×N structure. The band cord has a low tensile elastic modulus range and a high tensile elastic modulus range, wherein an inflection point between the low tensile elastic modulus range and the high tensile elastic modulus range lies between 2% elongation and 7% elongation of the cord, and a tensile force required to cause 2% elongation of the band cord is not more than 60 Newton.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: July 9, 2013
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventor: Toru Fukumoto
  • Patent number: 8403014
    Abstract: 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: Grant
    Filed: May 16, 2008
    Date of Patent: March 26, 2013
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventor: Toru Fukumoto
  • Patent number: 8261795
    Abstract: There are provided a pneumatic radial tire of heavy load vehicles, in which durability of a belt is improved. A pneumatic radial tire for heavy load vehicles comprises a pair of bead portions in each of which a bead core is embedded, a radial carcass ply 1 extending from one bead portion to the other bead portion and turned around the bead core from an inner side to an outer side of the bead core in a width direction of the tire and at least six belt layers 2 disposed on an outer side of this radial carcass ply 1 in a radial direction of the tire, wherein the following relations are satisfied: W56>W34>W12, where W12 is a maximum width of first and second belts 2a f the belt layers 2, W34 is a maximum width of third and forth belts 2b of the belt layers 2 and W56 is a maximum width of fifth and sixth belts 2c of the belt layers 2; and 1>D12/D34>0.6, where D12 is a cord diameter of the first and second belts and D34 is a cord diameter of the third and forth belts.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: September 11, 2012
    Assignee: Bridgestone Corporation
    Inventor: Masanori Aoyama
  • Patent number: 8210223
    Abstract: A pneumatic tire for use on aircraft has a tread, a crown reinforcement, and a radial carcass reinforcement having at least one axially inner ply of textile cords wound around a pair of bead cores, at least one axially inner ply being wound around the bead core in each bead from inside to the outside forming outside turn-ups and at least one axially outer ply of textile cords extending from bead to bead along the turn-ups of the at least one axially inner ply. The at least one axially inner ply or at least one axially outer ply has merged cords having a percent elongation at break of 12% to less than 20% and a break strength greater than 1050 N with a linear density of greater than 9,000 dtex. Merged cord reinforcement is preferably used in the ply layers or strips of the crown reinforcement as well.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: July 3, 2012
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Walter Kevin Westgate, Yuvaraj Senthil Arumugam, Robert John Gartland
  • Patent number: 8012056
    Abstract: Poly-V belt, particularly for driving accessories of an internal combustion engine, comprising a cord realized from a yarn composed of a plurality of filaments by means of a first twisting in which are formed at least two plied yarns each composed of at least one yarn and a second twisting in which the plied yarns are twisted together to form the cord; the first twisting and the second twisting are made in opposite directions, and the numbers of twists per meter of the two twisting steps are calculated so that in the finished cord the filaments form with the axis of the cord an angle smaller than 3.3°.
    Type: Grant
    Filed: October 4, 2004
    Date of Patent: September 6, 2011
    Assignee: Dayco Europe S.R.L. Con Unico Socio
    Inventors: Marco Di Meco, Carlo Trappolini, Marino Petaccia
  • Publication number: 20100236211
    Abstract: A single-layered rubber-product-reinforcing steel cord with good rubber penetration properties, excellent fatigue resistance, and small low-load stretch is obtained. All of wires 11 are provided with curls having a substantially elliptical cross-section and a pitch smaller than that of curls for intertwining, formed by providing the wires with spiral curls and then pressing the wires. These wires are intertwined into each other to form a single-layered twist structure, and, thus, a cord is obtained in which a hollow portion at the center of the cord is in communication with an outside via a gap 12 between the wires 11, and at least any one pair of adjacent wires 11 are substantially in contact with each other at any point in the longitudinal direction of the cord.
    Type: Application
    Filed: March 18, 2010
    Publication date: September 23, 2010
    Applicant: TOKUSEN KOGYO CO., LTD.
    Inventor: Noritaka MORIOKA
  • Patent number: 7721780
    Abstract: A pneumatic tire has a single carcass ply, at least one belt ply disposed radially outward of the carcass ply in a crown portion of the tire, and at least one insert located adjacent the carcass ply in a sidewall portion, the insert providing support for the tire load to enable the tire to operate in underinflated conditions. The carcass ply is comprised of at least one composite cord. The composite cord is formed of at least two first yarns twisted helically about at least one second yarn. The first yarns and the second yarn having different modulus of elasticity, the first yarns having a modulus greater than the modulus of the second yarn.
    Type: Grant
    Filed: July 21, 2005
    Date of Patent: May 25, 2010
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Yves Donckels, Serge Julien Auguste Imhoff, René François Reuter, Filomeno Gennaro Corvasce, Massimo Di Giacomo Russo
  • Patent number: 7594380
    Abstract: A hybrid layered cable for use in tire reinforcement includes a non-metallic internal layer and an unsaturated external layer including 3-12 strands. Each strand is at least partly metallic and is helically wound around the internal layer. Each strand includes at least 3 filaments wound helically together. The cable has a relative elongation at break, measured in tension in accordance with the standard ISO 6892 of 1984, which is higher than 7%.
    Type: Grant
    Filed: December 27, 2004
    Date of Patent: September 29, 2009
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: Henri Barguet, Le Tu Anh Vo, Thibaud Pottier, Laurence Ducourant
  • Patent number: 7562684
    Abstract: The durability is improved by using as a carcass ply cord or a belt cord of a tire a cord formed by twisting plural steel filaments having a tensile strength of not less than 2700 N/mm2, and a total elongation at break of the cord of 3.0-7.0% without sacrificing the excellent ride comfort.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: July 21, 2009
    Assignee: Bridgestone Corporation
    Inventor: Sumito Nakagawa
  • Patent number: 7552753
    Abstract: A tire for a vehicle wheel includes at least one metallic reinforcing cord comprising a single strand of elementary filaments preformed by sinusoidal waving and wound together. The number of filaments is greater than or equal to 3 and less than or equal to 8. A diameter of each filament is greater than or equal to 0.12 mm and less than or equal to 0.35 mm. A linear density of the at least one reinforcing cord is greater than or equal to 0.18 g/m and less than or equal to 4.0 g/m. A value of a breaking-stress integral of the at least one reinforcing cord is greater than or equal to 5,000 J/m3. In a two-wheeled vehicle, the at least one reinforcing cord in a tire for front-mounting may be distributed with a variable density while, in a tire for rear-mounting, the density may be constant.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: June 30, 2009
    Assignee: Pirelli Pneumatici S.p.A.
    Inventors: Giancarlo Armellin, Guido Riva
  • Patent number: 7484545
    Abstract: A pneumatic tire for use on aircraft has a tread, a crown reinforcement, and a radial carcass reinforcement having at least one axially inner ply of textile cords wound around a pair of bead cores, at least one axially inner ply being wound around the bead core in each bead from inside to the outside forming outside turn-ups and at least one axially outer ply of textile cords extending from bead to bead along the turn-ups of the at least one axially inner ply. The at least one axially inner ply or at least one axially outer ply has merged cords having a percent elongation at break of 12% to less than 20% and a break strength greater than 1050 N with a linear density of greater than 9,000 dtex. Merged cord reinforcement is preferably used in the ply layers or strips of the crown reinforcement as well.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: February 3, 2009
    Assignee: The Goodyear Tire & Rubber Co.
    Inventors: Walter Kevin Westgate, Yuvaraj Senthil Arumugam, Robert John Gartland
  • Patent number: 7441573
    Abstract: The present invention relates to a pneumatic tire having a component including at least one diene based rubber and discontinuous textile cord having at least two textile yarns, wherein the cord is partially untwisted.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: October 28, 2008
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Carlo Kanz, René François Reuter
  • Patent number: 7404426
    Abstract: A hybrid cord 1 for rubber reinforcement comprises a strand 2 having higher elastic modulus, made of PBO fiber or the like, which is disposed at the center of the cord, and strands 3 having lower elastic modulus, made of glass fiber or the like, which are disposed therearound. The hybrid cord has enough strength and is excellent in flexural fatigue resistance, adhesion property relative to rubber, and dimensional stability. A rubber product employs this hybrid cord 1 for rubber reinforcement.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: July 29, 2008
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Mitsuharu Akiyama, Takeshi Maeda, Yukinari Okuyama
  • Patent number: 7380579
    Abstract: The present invention relates to a metal cable usable for reinforcing a carcass reinforcement for a tire, such as a heavy-vehicle tire, to a composite fabric usable as a ply for such a carcass reinforcement, to a carcass reinforcement comprising this fabric and to a tire incorporating this carcass reinforcement. A metal cable according to the invention comprises a textile wrap, and is such that said wrap is formed of an aromatic thermotropic polyester or polyester amide. A composite fabric according to the invention is such that it comprises a rubber composition which is reinforced by said cables. A tire according to the invention has its carcass reinforcement comprising said composite fabric.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: June 3, 2008
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: Philippe Esnault, Le Tu Anh Vo
  • Patent number: 7316254
    Abstract: A pneumatic tire comprises a cord-reinforced layer such as carcass, belt, bead reinforcing layer which is made of metallic cords, each metallic cord is made up of six to twelve metallic filaments whose diameter is in a range of from 0.15 to 0.45 mm, the metallic filaments include waved filaments and unwaved filaments, each waved filament is two-dimensionally waved at a wave pitch and wave height before twisted, the wave pitch is in a range of from 5.0 to 35.0 times the diameter of the filament, and the wave height is in a range of from 0.2 to 4.0 times the diameter of the filament, and the metallic filaments are twisted together into the cord at a twist pitch of from 10 to 40 mm so that the two-dimensionally waved filaments are each subjected to a certain rotation around its axial.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: January 8, 2008
    Assignees: Sumitomo Rubber Industries, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Shinichi Miyazaki, Kazumi Yamazaki, Osamu Toda, Yasuo Sakai
  • Patent number: 7308923
    Abstract: It is an object of the present invention to provide a hybrid dip cord consisting of rayon yarn and lyocell yarn to apply to the carcass ply or cap ply (belt reinforced layer) of pneumatic radial tire used in a car and a radial tire using the same. And also, according to the present invent the hybrid dip cord and the radial tire for application to the carcass ply or cap ply (belt reinforced layer) of pneumatic radial tire used in cars are produced by means of the following steps; imparting S direction twist of 20 to 200 TPM yarn number to one rayon yarn to produce a pre-yarn, imparting twist to said one rayon pre-yarn and one non-twisted lyocell respectively to produce a ply twist yarn, and imparting cable twist to two ply of ply twist yarn made from combination of said ply twist yarn or impart cable twist to a ply twist yarn to be produced by regulating low the twist number of one lyocell yarn and the rayon yarn to one lyocell as 20 to 200 TPM when the ply twist processes.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: December 18, 2007
    Assignee: Hyosung Corporation
    Inventors: Ik-Hyun Kwon, Soo-Myung Choi, Yun-Hyuk Bang, Si-Hwan Joo
  • Publication number: 20070251623
    Abstract: The present invention provides a lyocell raw cord prepared from at least 2-ply lyocell multifilaments, which gives a stress-strain curve exhibiting that (a) the lyocell raw cord has an elongation of 1.5% or less at an initial stress of 1.0 g/d, and an initial modulus value of 50 to 100 g/d; (b) has an elongation of 7% or less in a stress region of 1.0 g/d to 4.0 g/d; and (c) has an elongation of 1% or more at a tensile strength of 4.0 g/d to the breaking point, as measured in the dried state. The lyocell raw cord prepared according to the present invention can be used as industrial fibers, in particular, fibers for tire cords.
    Type: Application
    Filed: October 4, 2006
    Publication date: November 1, 2007
    Applicant: HYOSUNG Corporation
    Inventors: Seok-Jong Han, Soo-Myung Choi, Young-Soo Wang, Sung-Ryong Kim, Tae-Jung Lee
  • Publication number: 20070251624
    Abstract: The present invention provides a lyocell dipped cord prepared by dipping a lyocell raw cord comprising at least 2-ply lyocell multifilament in a dipping solution and curing the dipped cord, which gives a stress-strain curve exhibiting that (a) the lyocell dipped cord has an elongation of 1.2% or less at an initial stress of 1.0 g/d, and an initial modulus value of 80 to 200 g/d; (b) has an elongation of 6% or less in a stress region of 1.0 g/d to 4.0 g/d; and (c) has an elongation of 1% or more at a tensile strength of 4.0 g/d to the breaking point, as measured in the dried state. The lyocell dipped cord prepared according to the present invention can be used as industrial fibers, in particular, fibers for tire cords.
    Type: Application
    Filed: October 5, 2006
    Publication date: November 1, 2007
    Applicant: HYOSUNG Corporation
    Inventors: Seok-Jong Han, Soo-Myung Choi, Young-Soo Wang, Sung-Ryong Kim, Tae-Jung Lee
  • Patent number: 7165586
    Abstract: Disclosed is a tire having at least one reinforcing ply in the carcass, belt, or bead region of the tire. The reinforcing ply is comprised of a blended fiber cord. The cords, in combination with a preferred cure temperature adhesive, achieve a high degree of thermal stability allowing for the use of such cords in various reinforcing plies for a pneumatic tire and for preferred use for such cords in areas of the tire subject to high temperatures either in curing or performance.
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: January 23, 2007
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Walter Kevin Westgate, Robert John Gartland, James Gregory Gillick, Rene Francois Reuter, Frank Schmitz
  • Patent number: 7152644
    Abstract: A method of manufacturing a rubber reinforcing steel cord is provided, wherein the steel cord has a steel wire plated with metal containing copper and having on its surface an oil layer containing a cobalt compound, and includes an application step in which the oil containing a cobalt compound is applied to the steel wire or a steel cord plated with metal containing copper, and a step of twisting the steel wires.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: December 26, 2006
    Assignees: Sumitomo Rubber Industries, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Shinichi Miyazaki, Osamu Toda, Yasuo Sakai
  • Patent number: 7066229
    Abstract: A pneumatic tire comprises a cord-reinforced layer such as carcass, belt, bead reinforcing layer which is made of metallic cords, each metallic cord is made up of six to twelve metallic filaments whose diameter is in a range of from 0.15 to 0.45 mm, the metallic filaments include waved filaments and unwaved filaments, each waved filament is two-dimensionally waved at a wave pitch and wave height before twisted, the wave pitch is in a range of from 5.0 to 35.0 times the diameter of the filament, and the wave height is in a range of from 0.2 to 4.0 times the diameter of the filament, and the metallic filaments are twisted together into the cord at a twist pitch of from 10 to 40 mm so that the two-dimensionally waved filaments are each subjected to a certain rotation around its axial.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: June 27, 2006
    Assignees: Sumitomo Rubber Industries, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Shinichi Miyazaki, Kazumi Yamazaki, Osamu Toda, Yasuo Sakai
  • Patent number: 6971427
    Abstract: A pneumatic tire includes a body having a plurality of main body cords. The tire includes an upper section above the maximum section width and a lower section below the maximum section width. The modulus of the body cords is configured to be larger in the lower section than in the upper section. This modulus ratio decreases the rolling resistance of the tire. The increased modulus in the lower section is achieved by providing intermediate body cords disposed between the main body cords. In another embodiment, the increased modulus is achieved by changing the material and/or size of the cords in the lower section.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: December 6, 2005
    Assignee: Brodgestone Firestone North American Tire, LLC
    Inventors: Carolyn W. Bernstorf, Jean-Yea Chen, Jie Jin, Masahiro Takayama, Hidetoshi Yokota
  • Patent number: 6962182
    Abstract: A multi-layer cable having an unsaturated outer layer, usable as a reinforcing element for a crown reinforcement of a tire, comprising a core of diameter d0 surrounded by an intermediate layer (C1) of six or seven wires (N=6 or 7) of diameter d1 wound together in a helix at a pitch p1, this layer C1 itself being surrounded by an outer layer (C2) of P wires of diameter d2 wound together in a helix at a pitch p2, P being less by 1 to 3 than the maximum number Pmax of wires which can be wound in one layer about the layer C1, this cable having the following characteristics (d0, d1, d2, p1 and p2 in mm): (i) 0.28?d0<0.50; (ii) 0.25?d1<0.40; (iii) 0.25?d2<0.40; (iv) for N=6: l.10<(d0/d1)<1.40; for N=7: 1.40<(d0/d1)<1.70; (v) 5.3?(d0+d1)<p1<p2<4.7?(d0+2d1+d2); and (vi) the wires of layers C1 and C2 are wound in the same direction of twist.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: November 8, 2005
    Assignee: Michelin Rechlin et Techerche S.A.
    Inventors: Francois-Jacques Cordonnier, Alain Domingo
  • Patent number: 6959745
    Abstract: A steel cord is composed of three to six steel filaments each having a filament diameter of from 0.25 to 0.45 mm, the three to six steel filaments including shaped filaments and twisted together, wherein the shaped filaments are, before twisted together, coiled to be set in a form of coil having a coil diameter of less than 5 mm and a coil pitch of more than 5 mm, the shaped filaments include at least two kinds of shaped filaments which are different in respect of the form of coil, the shaped filaments are twisted together while the coil diameter is reduced, the elongation of the cord at 50 N load is less than 0.2%, and the cord strength is in a range of from 2500 to 3500 N/sq.mm.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: November 1, 2005
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Shinichi Miyazaki, Kazumi Yamazaki, Osamu Toda
  • Patent number: 6899629
    Abstract: In order to make it possible to improve a durability of a cord wound around a connection element and to downsize a cord wound portion, in an elastic coupling structured such that connection elements connected to a drive side yoke and connection elements connected to a driven side yoke are alternately arranged on a circumference, cords are wound around each of the mutually adjacent connection elements so as to form a band shape, and the connection elements and the cords are coated by an elastic material. A single yarn having a twist number of 10 times per 10 cm or less is used as the cords.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: May 31, 2005
    Assignee: NOK-Vibracoustic Co., LTD
    Inventor: Takayoshi Kotsusa
  • Patent number: 6863103
    Abstract: A steel cord having a strand construction formed by twisting a plurality of sheath strands each formed by twisting plural filaments around a core strand formed by twisting plural filaments is provided. At least one of the core strand and the sheath strands has a construction of twisting one or more sheath layers each made of plural filaments around a core made of one or plural filaments, and a diameter of a filament constituting an outermost sheath layer is made larger than that of a filament constituting at least one layer located inside thereof, whereby precedent breakage in a part of the filaments is avoided to improve the durability of the steel cord.
    Type: Grant
    Filed: November 10, 2000
    Date of Patent: March 8, 2005
    Assignee: Bridgestone Corporation
    Inventors: Hideki Masubuchi, Yukimasa Fukuda
  • Patent number: 6857458
    Abstract: A strip of tire ply stock is reinforced with steel cords wherein the steel cords are constructed of high strength wire filament having at least a tensile strength of ?2000×D+4400 MPa where D is the filament diameter in mm. Tires are constructed with the ply stock in the belt and/or carcass.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: February 22, 2005
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Italo Marziale Sinopoli, Charles Elmer Hamiel
  • Patent number: 6837289
    Abstract: A multi-layer cable having an unsaturated outer layer, usable as a reinforcing element for a tire carcass reinforcement, comprising a core of diameter d0 surrounded by an intermediate layer (C1) of four or five wires (M=4 or 5) of diameter d1 wound together in a helix at a pitch p1, this layer C1 itself being surrounded by an outer layer (C2) of N wires of diameter d2 wound together in a helix at a pitch p2, N being less by 1 to 3 than the maximum number Nmax of wires which can be wound in one layer about the layer C1, this cable having the following characteristics (d0, d1, d2, p1 and p2 in mm): 0.08<d0<0.28;??(i) 0.15<d1<0.28;??(ii) 0.12<d2<0.25;??(iii) for M=4: 0.40 <(d0/d1)<0.80;??(iv) for M=5: 0.70<(d0/d1)<1.10; 4.8?(d0+d1)<p1<p2<5.6?(d0+2d1+d2);??(v) the wires of layers C1 and C2 are wound in the same direction of twist.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: January 4, 2005
    Assignee: Michelin Recherche et Technique, S.A.
    Inventors: Francois-Jacques Cordonnier, Alain Domingo, Henri Barguet, Le Tu Anh Vo
  • Publication number: 20040250936
    Abstract: A tire reinforcing steel cord (1, 10) is provided which has a 1×n structure formed by twisting together four to seven individual wires having a wire diameter of 0.20 to 0.45 mm, the steel cord being wound a plurality of times in the vicinity of opposite side edges of a belt section of a tire, wherein the steel cord has a substantially spiral or a substantially planar wavy deformation, has an elongation of 1.2% to 2.0% when applying a tensile load of 50 N in a tensile test according to JIS B 7721, and becomes substantially linear with its wavy deformation disappearing under a tensile load in the range of 50 to 250 N.
    Type: Application
    Filed: January 21, 2003
    Publication date: December 16, 2004
    Inventors: Noritaka Morioka, Sinya Harikae
  • Publication number: 20040250937
    Abstract: A band layer in which a band cord is wound around in a spiral manner along a circumferential direction of the tire is provided. The band cord comprises total nine metallic wires including at least five shaped wires, and is formed by twining two to four wire bundles composed of a plurality of said metallic wires twined wile twisting each wire thereof. Each shaped wire is formed in a two-dimensional shape with repeated peaks and troughs in a condition prior to the twisting. The metallic wires of each wire bundle are revolved around the center of the wire bundle while rotating on its own axis through the twining.
    Type: Application
    Filed: June 10, 2004
    Publication date: December 16, 2004
    Inventor: Shinichi Miyazaki
  • Patent number: 6817395
    Abstract: A pneumatic radial ply tire 20 has a tread 24, a carcass 21, and a belt reinforcing structure 40. The carcass 21 has a steel cord reinforced radial ply extending from one annular bead to a second annular bead. The belt reinforcing structure 40 has at least two belt layers 40A, 40B having steel cords 14 with large filaments 17A, 17B, 17C, 17D in the range of 0.3 mm to 0.6 mm in diameter twisted into a 7×7 cord construction.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: November 16, 2004
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Italo Marziale Sinopoli, Charles Elmer Hamiel, Barry Allen Matrana
  • Publication number: 20040221937
    Abstract: Belt bandage for a vehicle pneumatic tire that includes a ply having strength carriers embedded in an unvulcanized rubber mixture. The strength carriers run essentially parallel to one another. Each strength carrier includes a hybrid cord that has a first twisted yarn having a high modulus of elasticity of at least approximately 25000 N/mm2 and a second twisted yarn having a low modulus of elasticity which is no greater than approximately 15000 N/mm2. The first and second twisted yarns are final-twisted together.
    Type: Application
    Filed: May 7, 2004
    Publication date: November 11, 2004
    Applicant: Continental Aktiengesellschaft
    Inventors: Jorg Dehnert, Gunter Wahl
  • Patent number: 6811877
    Abstract: A reinforcing structure designed for handling compression stress states when the structure is molded into a composite. The structure, specifically a wrapped cord with metallic filaments contained therein, is suitable for both compression and tension load forces. The reinforcing structure has a core comprising a plurality of essentially straight, nested filaments arranged in parallel, the filaments forming a line of contact with adjacent filaments that extends along the length of the filaments. Wrapped about the core is at least one helically wound wire.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: November 2, 2004
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Gary Allen Haislet, George C. Tunis, III, Emmanuel Albert Gooding
  • Patent number: 6805178
    Abstract: A metallic cord is composed of metallic filaments gathered together, the metallic filaments include at least one patterned filament which is, before gathered together, two-dimensionally waved so as to have a wave form defined by plural kinds of cycles different from each other in respect of the wave length and/or wave height. A pneumatic tire includes the metallic cords as its carcass cords.
    Type: Grant
    Filed: May 9, 2002
    Date of Patent: October 19, 2004
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Shinichi Miyazaki, Kazumi Yamazaki, Osamu Toda
  • Patent number: 6799618
    Abstract: A pneumatic tire (10) comprises a radial ply (12) carcass, a tread portion disposed radially outwardly of the crown area (14) of the carcass and a crown reinforcing structure interposed between the tread portion (19) and the carcass. The crown reinforcing structure includes a belt assembly (15) having at least a first (16), radially innermost and a second (17), radially outermost belt ply as well as a textile overlay structure (18) which is superimposed radially outwardly to said belt assembly (15). The textile overlay structure is reinforced with cords (40, 51) being made of materials including nylon and aramid. At initial elongation of the cords, the primary load bearing yarns are the nylon yarns; after appreciable elongation the primary load bearing yarns are the aramid yarns.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: October 5, 2004
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: René François Reuter, Frank Schmitz, Serge Julien Auguste Imhoff, Yves Donckels
  • Patent number: 6766841
    Abstract: A multi-layer cable having an unsaturated outer layer, usable as a reinforcing element for a crown reinforcement of a tire, comprising a core of diameter d0 surrounded by an intermediate layer (C1) of four or five wires (N=4 or 5) of diameter d1 wound together in a helix at a pitch p1, this layer C1 itself being surrounded by an outer layer (C2) of P wires of diameter d2 wound together in a helix at a pitch p2, P being less by 1 to 3 than the maximum number Pmax of wires which can be wound in one layer about the layer C1, this cable having the following characteristics (d0, d1, d2, p1 and p2 in mm): (i) 0.10≦d0<0.50; (ii) 0.25≦d1<0.40; (iii) 0.25≦d2<0.40; (iv) for N=4: 0.40<(d0/d1)<0.80; for N=5: 0.70<(d0/d1)<1.10; (v) 4.8 &pgr;(d0+d1)<p1<p2<5.6&pgr;(d0+2d1+d2); and (vi) the wires of layers C1 and C2 are wound in the same direction of twist.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: July 27, 2004
    Assignee: Michelin Recherche et Technique, S.A.
    Inventors: Francois-Jacques Cordonnier, Alain Domingo, Henri Barguet
  • Patent number: 6755226
    Abstract: A composite cord is provided which is simple in manufacture, highly productive, less costly, and improved in rubber penetration. The composite cord has a 1×n construction (n is an integer from 3 to 12) with 2 to 11 metallic filaments and 1 to 5 polymer fibers having a melting point of 50 to 200 degrees twisted together. The pneumatic tire employing this composite cord for its reinforcing element is restricted in rust formation and improved in strength retention.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: June 29, 2004
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Shinichi Miyazaki, Osamu Toda
  • Patent number: 6748989
    Abstract: A multi-layer cable having an unsaturated outer layer, comprising a core (C0) of diameter d0 surrounded by an intermediate layer (C1) of six or seven wires (M=6 or 7) of diameter d1 wound together in a helix at a pitch p1, surrounded by an outer layer (C2) of N wires of diameter d2 wound together in a helix at a pitch p2, N being less by 1 to 3 than the maximum number Nmax of wires which can be wound in one layer about the layer C1, this cable has the following characteristics (d0, d1, d2, p1 and p2 in mm): (i) 0.14<d0<0.28; (ii) 0.12<d1<0.25; (iii) 0.12<d2<0.25; (iv) for M=6: 1.10<(d0/d1)<1.40; for M=7: 1.40<(d0/d1)<1.70; (v) 5&pgr;(d0+d1)<p1<p2<5&pgr;(d0+2d1+d2); (vi) the wires of layers C1 and C2 are wound in the same twist direction.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: June 15, 2004
    Inventors: Francois-Jacques Cordonnier, Alain Domingo
  • Publication number: 20040108038
    Abstract: A multi-layer cable having an unsaturated outer layer, usable as a reinforcing element for a tire carcass reinforcement, comprising a core of diameter d0 surrounded by an intermediate layer (C1) of four or five wires (M=4 or 5) of diameter d1 wound together in a helix at a pitch p1, this layer C1 itself being surrounded by an outer layer (C2) of N wires of diameter d2 wound together in a helix at a pitch p2, N being less by 1 to 3 than the maximum number Nmax of wires which can be wound in one layer about the layer C1, this cable having the following characteristics (d0, d1, d2, p1 and p2 in mm):
    Type: Application
    Filed: June 24, 2002
    Publication date: June 10, 2004
    Inventors: Francois-Jacques Cordonnier, Alain Domingo, Henri Barguet, Le Tu Anh Vo
  • Patent number: 6745806
    Abstract: The invention improves rubber permeability while making a cord diameter compact. A metal cord is constituted by a layered structure having a core comprising totally 6 to 12 filaments sectioned into 1 to 4 filament bundles, and a sheath comprising 8 to 15 filaments arranged around the core. Each of the filament bundles includes a waved filament modeled in a two-dimensional wave shape and a non-waved filament, in a state before being bundled. The core makes the wave of the waved filament three-dimensional within the core by applying torsion to each of the filament bundles.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: June 8, 2004
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Shinichi Miyazaki, Kazumi Yamazaki, Osamu Toda
  • Publication number: 20040060631
    Abstract: A multi-layer cable having an unsaturated outer layer, usable as a reinforcing element for a crown reinforcement of a tire, comprising a core of diameter d0 surrounded by an intermediate layer (C1) of six or seven wires (N=6 or 7) of diameter d1 wound together in a helix at a pitch p1, this layer C1 itself being surrounded by an outer layer (C2) of P wires of diameter d2 wound together in a helix at a pitch p2, P being less by 1 to 3 than the maximum number Pmax of wires which can be wound in one layer about the layer C1, this cable having the following characteristics (d0, d1, d2, p1 and p2 in mm):
    Type: Application
    Filed: July 3, 2003
    Publication date: April 1, 2004
    Inventors: Francois-Jacques Cordonnier, Alain Domingo
  • Patent number: 6705370
    Abstract: Load Range C or D radial light truck tires have plies reinforced with metallic cords. At least one of the plies has an inch strength of at least 11,500 N/mm2 per in. and is reinforced with 0.32 mm-0.40 mm filament diameter ultra tensile steel cords at 17-24 ends per inch. The ply may be located in any of the tire components such as the belt, carcass, chipper, or chafer.
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: March 16, 2004
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Charles Elmer Hamiel, Italo Marziale Sinopoli, Daniel Ignatius Kowalski, Jr., Ray Allison Young
  • Publication number: 20040045652
    Abstract: A steel cord according to the invention comprises a metal core strand (11) and adjacent layer of steel elements (13). Between metal core strand (11) and adjacent layer of steel elements (13), a polymer layer (16) with a minimum thickness of more than 0.02 mm is provided. These steel cords are to be used to reinforce off-the-road tires or conveyor belts.
    Type: Application
    Filed: May 22, 2003
    Publication date: March 11, 2004
    Inventors: Stijn Vanneste, Steven Wostyn, Niko De Rore, Dirk Meersschaut
  • Patent number: 6695026
    Abstract: A pneumatic tire comprises a tread reinforcing belt made of metallic cords, each of the metallic cords is made up of six to twelve metallic filaments whose diameter is not less than 0.15 mm but less than 0.25 mm, the six to twelve metallic filaments are grouped into a plurality of bunches each including two to four filaments, the filaments of each bunch are twisted together at a first twisting pitch, the bunches are twisted together into the cord at a final twist pitch Pc of from 10 to 40 mm, the first twisting pitch is more than the final twist pitch, and the bunches each include at least one waved filament which is two-dimensionally waved at wave pitches Pw in a range of from 5 to 30 times the diameter (d) of the filament and a wave height (h) in a range of from 0.2 to 3.0 times the diameter (d).
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: February 24, 2004
    Assignees: Sumitomo Rubber Industries, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Shinichi Miyazaki, Kazumi Yamazaki, Osamu Toda, Yasuo Sakai
  • Patent number: 6695025
    Abstract: The tire (70) of the invention incorporates a carcass ply cord material (93) with variable modulus of elasticity to provide an active sidewall structure (82a, 82b). The variable modulus cord material is incorporated in the axially outwardmost ply (90) of a carcass (80) having two plies (88, 90) separated by elastomeric inserts (89a, 89b) in the sidewalls (82a, 82b). The outer ply cord material (93) provides an increased modulus of elasticity with an increase in elongation. The inner ply cords (91) have a modulus that substantially exceeds that of the outer ply cords (93) under normal loads in the inflated mode. Thus, the inner ply (88) dominates the structural response of the sidewalls (82a, 82b) at normal loads in the inflated mode. Under severe sidewall deflection, such as when the tire is uninflated, the outer ply cord (93) is elongated, increasing its modulus of elasticity and thus, shifting the load from the axially inwardmost ply (88) to the axially outwardmost ply (90).
    Type: Grant
    Filed: October 17, 2001
    Date of Patent: February 24, 2004
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Alain Emile Francois Roesgen, Laurent Colantonio, Marie-Rita Catherine Amelie Thise-Fourgon
  • Patent number: 6691758
    Abstract: A strip of tire ply stock is reinforced with steel cords wherein the steel cords are constructed of high strength wire filament having at least a tensile strength of −2000×D+4400 MPa where D is the filament diameter in mm. Tires are constructed with the ply stock in the belt and/or carcass.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: February 17, 2004
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Dong Kwang Kim, Amit Prakash