Distinct Layers Patents (Class 138/140)
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Publication number: 20040144440Abstract: A flexible, fiber reinforced pipe has been invented for conveying fluids. The pipe is flexible enough to be spoolable, even under winter temperature conditions. The pipe can contain pressure, when buried, unrestrained and bent. The pipe exhibits impact resistance under normal handling and can be formed using a continuous process, such that it can be manufactured as it is being laid. A flexible, fiber reinforced pipe includes an inner tubular liner having an inner surface and an outer surface; a first layer of reinforcing fibers helically wrapped about the inner liner and in direct contact therewith; an outer layer of reinforcing fibers helically wrapped about an underlying layer of reinforcing fibers and in direct contact therewith; and an outer tubular sheath applied over the outer layer in direct contact therewith.Type: ApplicationFiled: January 27, 2003Publication date: July 29, 2004Inventors: Chris A. Lundberg, David W. McLeod, Samuel Glen Bouey
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Publication number: 20040134555Abstract: Multi-layer tubular polymeric composite for articles such as tubing and hoses. The composite may be formed of an innermost and an outermost layer, and at least one interlayer between the innermost and the outermost layer. The innermost and the outermost layer each may be bonded directly to one of the interlayers, and may be formed of a thermoplastic polymeric material which may be a polyamide. Each of the interlayers may be formed of a thermoplastic polymeric material which may be a polyester or copolyester, or a polyurethane.Type: ApplicationFiled: October 27, 2003Publication date: July 15, 2004Inventors: Steven M. Powell, Ronald A. Moner, James L. Johnston, John R. Greco, Nick A. Martino
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Patent number: 6759109Abstract: A rubber hose having a multilayer wall is formed of an inner layer of NBR type rubber having a high AN content, available at a low cost and highly impermeable to fuel and an outer layer of a rubber composition having a minimum Mooney viscosity of 25 to 65 at its curing temperature and highly resistant to flattening. Those layers are extruded and cured together without the aid of any mandrel owing to the inside diameter and wall thickness of the hose and the thickness of the outer layer which fall within specific ranges. This process enables the manufacture of a fuel hose having a high fuel impermeability at a low cost, while protecting its inner wall effectively from flattening during curing.Type: GrantFiled: September 26, 2001Date of Patent: July 6, 2004Assignee: Tokai Rubber Industries, Ltd.Inventors: Shinobu Kanbe, Takahiro Nishiyama, Hideki Shinohara
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Patent number: 6745796Abstract: A hydrogen fuel transporting hose for a fuel cell powered vehicle having a laminar structure includes at least one inner rubber layer, at least one reinforcing layer, and at least one outer rubber layer, which layers are laminated integrally with one another in the order of description in a radially outward direction of the hose. Each of the inner and outer rubber layers are obtained by vulcanizing a rubber composition including a rubber material selected from the group consisting of a halogenated butyl rubber material, and a blend of a halogenated butyl rubber material and a butyl rubber material. The vulcanized rubber includes a filler having a layered crystal structure and is vulcanized with one of a peroxide vulcanizing agent and a resin vulcanizing agent.Type: GrantFiled: February 28, 2003Date of Patent: June 8, 2004Assignee: Tokai Rubber Industries, Ltd.Inventors: Ayumu Ikemoto, Ryo Hirai
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Publication number: 20040086339Abstract: A pipe assembly comprises a flexible insulating material (16) in contact with the outer surface of the pipe (10) and a plurality of discrete spaced apart buoyant bodies (14) embedded in the flexible insulating material around the pipe. The flexible insulating material preferably forms a continuous layer in contact with the pipe and the buoyant bodies preferably comprise tubular bodies regularly spaced along the length of the pipe assembly. The provision of discrete buoyant bodies embedded within the insulating material allows relative movement between the bodies and enables the pipe to flexible without damaging the buoyant bodies.Type: ApplicationFiled: July 30, 2003Publication date: May 6, 2004Inventors: Andrew Charles Ratcliffe Tyrer, Robert Gibson, Richard Hepworth
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Patent number: 6729355Abstract: A reinforced flexible hose, especially a shower hose, being comprised of a thin-walled reinforced inner hose, at least one outside outer hose, at least one helical support between the inner hose and the outer hose, and reinforcement bands which are oriented in the hose's axial direction radially outside the helical support; and the reinforcement bands being connected to neighboring elements of the hose. In order for the hose to have a high-gloss metallized appearance over essentially the entire surface and to be light and highly flexible and also not to fatigue or tear when it is frequently bent, the reinforcement bands are made of an essentially unstretchable, high-gloss metallized film. They are arranged in the area radially between a top side of the helical support and below an outside surface of the outside outer hose.Type: GrantFiled: August 14, 2002Date of Patent: May 4, 2004Assignee: Vohran Patentverwertungs-GmbHInventor: Christoph Vohrer
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Patent number: 6719009Abstract: The present invention is a concrete piping system comprising a pipeline. The pipeline includes an intake end, an output end, a liner resistant to concrete abrasion and a pressure tube of composite materials placed over the liner. A concrete pump is connected to the intake end of the pipeline.Type: GrantFiled: February 22, 2002Date of Patent: April 13, 2004Assignee: Schwing America, Inc.Inventors: David R. Bissen, Lawrence P. Schmidt, Brian E. Spencer, Leo B. Willner
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Patent number: 6715511Abstract: The present invention relates to a multilayer tube comprising, in its radial direction from the outside inwards: a first layer of vulcanized elastomer forming the outer layer, a second layer of EVOH or of an EVOH-based blend, a third layer of a blend of a polyamide (A) and a polyolefin (B) having a polyamide matrix, optionally, an inner layer of vulcanized elastomer, the layers being successive and adhering to one another in their respective contact region. It is also possible to place a tie layer between the first and second layers, and likewise between the optional inner layer and the third layer. The tube of the invention may also include a reinforcing layer of the textile type, for example made of polyester or of metal wires, the said layer being placed between the first and second layers. This reinforcing layer may be between the tie layer and the EVOH layer or between the tie layer and the outer layer or else the tie may be placed in the interstices of the reinforcing layer.Type: GrantFiled: November 25, 2002Date of Patent: April 6, 2004Assignee: AtofinaInventors: Jun Yamamoto, Joachim Merziger, Christophe Maldeme
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Patent number: 6706350Abstract: A corrosion-resistant pipe is formed by covering a surface of a pipe with a resin composition that contains (A) 1 to 98 parts by weight of a polyphenylene ether resin; (B) 1 to 98 parts by weight of a polystyrene resin; (C) 1 to 98 parts by weight of a polyolefin resin; wherein the total of (A), (B), and (C) is 100 parts by weight; and (D) 0.1 to 100 parts by weight of a compatibility reagent per 100 parts by weight total of (A), (B), and (C).Type: GrantFiled: June 28, 2002Date of Patent: March 16, 2004Assignee: General Electric CompanyInventors: Sho Sato, Yoshinori Amaya
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Patent number: 6701969Abstract: A flexible pipe and a method of manufacturing same according to which an inner sheath is surrounded by at least one tensile layer, and an outer sheath of polymeric material consisting of an olefin polymer blended with at least one thermoset elastomer is disposed around the tensile layer.Type: GrantFiled: October 23, 2002Date of Patent: March 9, 2004Assignee: Wellstream International LimitedInventor: Brian Scott Wilson
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Publication number: 20040040609Abstract: An object of the present invention is to provide ultra-low permeation hoses which have at the interior thereof a refrigerant barrier layer that consists in large part of a metal layer and is capable of conforming to hose deformation, which have an excellent resistance to refrigerant permeation (i.e., barrier properties to refrigerants), particularly an excellent CO2 permeation resistance and an excellent heat resistance when CO2 is used as the refrigerant. The object can be accomplished by an ultra-low permeation hose having at least a refrigerant barrier layer and a rubber layer and/or a resin layer; wherein the refrigerant barrier layer is a laminated film comprising a resin layer and, on the outside thereof, a metal layer, which the resin layer and the metal layer are bonded together by a polyamide-epoxy reactive adhesive.Type: ApplicationFiled: August 29, 2003Publication date: March 4, 2004Applicants: THE YOKOHAMA RUBBER CO., LTD., YOKOHAMA HYDEX CO., NIHON MATAI CO., LTD.Inventors: Hideyuki Oishi, Yuuji Kawamori, Hiroaki Shibano, Fumio Tashiro
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Publication number: 20040040607Abstract: A hose suitable for use in refrigerant systems. The hose has a barrier layer formed of at least two layers of thermoplastic resin. At least one of the layers is a vinyl resin. The resins are selected so that the hose has a permeation rate of virtually zero.Type: ApplicationFiled: August 28, 2002Publication date: March 4, 2004Inventors: Reji Paul Wilson, Brian Henry
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Publication number: 20040035485Abstract: A multi-layer, composite material, and products made therefrom, having the combined properties of high strength, high chemical resistance, and low permeation to chemicals and gas. The multi-layer composite material has a barrier layer, an intermediate binding layer, and a support layer. The barrier layer is polyphenylene sulfide compounded with an ethylene/glycidyl methacrylate copolymer. The intermediate binding layer is ethylene/glycidyl methacrylate copolymer. The support layer is polyamide compounded with an ethylene/glycidyl methacrylate copolymer.Type: ApplicationFiled: May 1, 2003Publication date: February 26, 2004Applicant: Polyflow, Inc.Inventors: Robert Alan Gleim, Changhui Zhu
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Patent number: 6692804Abstract: Using a balanced flow path, multiple layers of extruded plastic are supplied to a chamber having independently rotating surfaces. Said rotating surfaces apply a shear force to at least the inner and outer layers of said extruded plastic to orient said materials in said layers in different helical patterns, thereby forming a multi-layer tubular product in which at least inner and outer layers have different helical patterns to strengthen the product.Type: GrantFiled: April 12, 2000Date of Patent: February 17, 2004Assignee: Guill Tool & Engineering Co., Inc.Inventors: A Roger Guillemette, Richard Guillemette
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Patent number: 6691742Abstract: A pipe assembly includes pipe having a protecting saddle connected thereto. A support member and a support saddle are provided to sustain the pipe, with the protecting saddle resting on the support saddle. One of the protecting saddle and the support saddle has a slippery coating to allow the pipe to move relative to the support saddle.Type: GrantFiled: April 25, 2003Date of Patent: February 17, 2004Inventor: Thomas L. Cooper
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Patent number: 6688339Abstract: A high-pressure composite pipe of the present invention comprises an inner layer pipe made of a synthetic resin, and a reinforcing layer formed by spirally winding a stretched polyolefin resin sheet on an external circumferential surface of the inner layer pipe. The synthetic resin for the inner layer pipe or a heat-sealable resin is filled into a gap defined by the stretched polyolefin resin sheet, thereby avoiding penetration of water from a cut surface of the pipe.Type: GrantFiled: February 27, 2003Date of Patent: February 10, 2004Assignee: Sekisui Chemical Co., Ltd.Inventors: Koji Yamaguchi, Katsuo Matsuzaka, Takehiro Yamada, Koichi Adachi, Mitsuhide Nogami
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Patent number: 6688338Abstract: A system and method for providing secondary containment for pipeline transmission systems that complies with environmental regulations for double wall applications. The outer surface of the pipeline is adapted with an epoxy bonded multi-ply fabric that forms a secondary containment structure external to the pipe with first and second spaced layers forming an interstitial space therebetween. An external coating of cured epoxy resin provides resistance to impact, abrasion, and chemically induced corrosion and deterioration. Probes may be installed at various locations along the pipeline for continuously sampling the environment within the interstitial space thereby providing leak detection. Secondary containment is constructed on an existing section of, steel, iron, fiberglass, composite, metal alloys, or concrete pipe.Type: GrantFiled: December 26, 2001Date of Patent: February 10, 2004Inventors: Paul Meli, Shanda Lee, Andy House
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Publication number: 20040020547Abstract: Pipe or tubing of crosslinked polyethylene (“PEX”) containing less than 2% by wt. carbon black provides improved resistance to oxidizing agents such as chlorine and hypochlorous acid in water. The pipe may be further protected with a thin tubular core (inner layer) of high density polyethylene or chlorinated polyethylene. The pipe may optionally have an oxygen barrier layer, such as poly(ethylene-co-vinyl alcohol) (“EVOH”), contiguously disposed radially outward from the carbon-containing PEX layer. The pipe is suitable for potable water applications and for hot water radiant heating systems.Type: ApplicationFiled: July 11, 2003Publication date: February 5, 2004Inventors: Carl M. Mahabir, Arthur L. Backman, Girish T. Dalal
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Patent number: 6684910Abstract: A pipe of layers of thermoplastic polyolefins of the same type, however with different properties, which are connected inseparably with one another, an outer first layer and a second layer, adjoining the first layer on the inside, consisting of a material, which has not been cross-linked, the second layer approximately having the FNCT the value or the NPT value of a one-layer standard pressure pipe and the first layer having an FNCT or NPT value, which is higher by a factor of at least 3 than that of the second value. Moreover, a third layer is provided, which adjoins the second layer on the inside, also consists of material that is not cross-linked and has a PNCT, which is higher by a factor of at least 3 than that of the second layer and an NPT layer, which is higher by a factor of at least 2 than that of the second layer.Type: GrantFiled: January 6, 2003Date of Patent: February 3, 2004Assignee: Wavin B.V.Inventors: Jan Uilke Stoffelsma, Volker Koestring, Ali Guettouche, Helmut Schroeder
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Patent number: 6682796Abstract: A fuel hose having a fluororesin layer formed from a copolymer of vinylidene fluoride and chlorotrifluoroethylene by powder coating or the like on the inner surface of a rubber tube is characterized by at least one of the following: (1) the copolymer contains a metal salt; (2) the rubber tube is of a mixture containing acrylic rubber; and (3) the rubber tube contains an organic ammonium salt or the like. The fuel hose is high in gasoline impermeability and flexibility and has a strong adhesion between the rubber tube and fluororesin layer.Type: GrantFiled: May 25, 2001Date of Patent: January 27, 2004Assignee: Tokai Rubber Industries, Ltd.Inventors: Hiroaki Ito, Shinji Iio
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Patent number: 6679295Abstract: A vibration absorbing rubber hose having a laminar structure including an inner rubber layer, a reinforcing layer, and an outer rubber layer, which layers are laminated integrally with one another in the order of description in a radially outward direction of the rubber hose, wherein the inner rubber layer is formed of a butyl rubber material and/or a halogenated butyl rubber material while the outer rubber layer is formed of an EPM material consisting of ethylene-propylene copolymer.Type: GrantFiled: July 26, 2002Date of Patent: January 20, 2004Assignee: Tokai Rubber Industries, Ltd.Inventors: Eiichi Daikai, Norihiko Furuta, Tetsuya Arima, Shinobu Kanbe
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Patent number: 6670004Abstract: A laminated nylon air brake tubing is formed from outer and inner layers of nylon 11 or nylon 12 with inner layers of nylon 6. The nylon 6 and nylon 11 or 12 layers are adhered together by a tie layer. The tie layer is preferably a nylon 6-12 or an anhydride modified polyolefin. The air brake tubing has improved high temperature strength and low temperature impact resistance characteristics.Type: GrantFiled: August 2, 2000Date of Patent: December 30, 2003Assignee: Saint-Gobain Performance Plastics CorporationInventor: Edward A. Green
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Publication number: 20030236043Abstract: A glass fiber duct liner, for lining sheet metal ducts in air conditioning, heating and ventilating systems, includes a flexible blanket of biosoluble glass fibers exhibiting a biodisolution rate in excess of 150 ng/cm2/hr. The glass fibers of the blanket are bonded together at their points of intersection by a colorless, formaldehyde-free, thermosetting, acrylic acid-based latex binder resin. A major surface of the blanket, adapted to be an interior surface of the blanket over which an airstream is to be conveyed by a duct system, is coated with a white acrylic latex water and dirt repellant coating that contains an antimicrobial agent.Type: ApplicationFiled: June 24, 2002Publication date: December 25, 2003Inventors: Thomas S. Calzavara, Kent Russell Matthews, Eric G. Schakel
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Patent number: 6648023Abstract: A low permeable hose having at least a refrigerant barrier layer and a rubber layer is provided. The barrier layer is a laminate film having a structure such that resin layers sandwich a metal layer therebetween and having an elongation at breakage of 10% or more. The outermost layer of the resin layer may be an adhesive layer composed of a phenol resin based composition. The hose can be produced by heating the refrigerant barrier layer and the rubber layer to a temperature no lower than the melting point of a resin that constitutes the resin layers to melt the resin and vulcanizing said rubber layer, or, laminating an adhesive layer composed of a phenol resin based composition and the rubber layer, thereby splicing the refrigerant barrier layer and the rubber layer.Type: GrantFiled: September 26, 2001Date of Patent: November 18, 2003Assignee: The Yokohama Rubber Co., Ltd.Inventors: Issei Nakakita, Hiroaki Shibano, Yuuji Kawamori
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Publication number: 20030207103Abstract: The present invention relates to a system and method for protecting and/or coating surfaces such as the surfaces of pipes, flues and/or conduits against corrosive environments which may be contained within or outside of the pipe, flue and/or conduit. More particularly, in one embodiment the present invention relates to a pipe, flue and/or conduit which has been coated with two or more layers which act to improve the corrosion resistance of the metal pipe, flue and/or conduit.Type: ApplicationFiled: May 3, 2002Publication date: November 6, 2003Inventors: Charles M. Zvosec, Efim Ya Lyublinski
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Patent number: 6641884Abstract: According to the present invention, there is provided a hose assembly with an inner fluoropolymer layer having a smooth inner surface and an outer polyamide layer having an undulated surface.Type: GrantFiled: August 9, 2000Date of Patent: November 4, 2003Assignee: Teleflex Fluid SystemsInventors: Norman S. Martucci, Boney A. Mathew
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Patent number: 6637465Abstract: A fuel hose which satisfies low-permeability requirements in conformity with stringent regulations against vapor emission of fuel gases, is halogen-free and has excellent hydrolysis resistance, inter-layer adhesiveness and low-temperature flexibility. The fuel hose comprises: an innermost layer (1) comprising a thermoplastic polyester elastomer and having a flexural modulus in a predetermined range; an intermediate layer (2) comprising a polyester resin and provided around the innermost layer (1); and an outermost layer (3) comprising a thermoplastic polybutylene terephthalate elastomer and provided around the intermediate layer (2).Type: GrantFiled: January 24, 2003Date of Patent: October 28, 2003Assignee: Tokai Rubber Industries, Ltd.Inventors: Hiroaki Ito, Hirokazu Kitamura
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Patent number: 6635322Abstract: A thermally insulating cover structure adapted for covering a hot pipe comprises a heat insulation layer (2), a filler layer (3) and a jacket (6), which is provided with drain openings (5). The filler layer comprises a material that is permeable to water. The drain openings are shielded against entry of water, while they allow drainage of water from the filler layer into the environment. This cover structure is in particular suited for outdoor pipelines, where moist conditions may arise. The invention also provides a pipeline and a method of providing a pipeline with a thermally insulating cover structure.Type: GrantFiled: February 15, 2000Date of Patent: October 21, 2003Assignee: Hygrowick-International ApsInventor: Vagn Korsgaard
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Patent number: 6631742Abstract: An amount of expansion of a hydraulic pressure hose is decreased and the fatigue characteristic against repeating pressurization, bending and twisting is improved. The hydraulic pressure hose comprising an inner rubber layer, a first braided fiber reinforced layer formed in the outer periphery of the inner rubber layer, an intermediate rubber layer formed in the outer periphery of the first braided fiber reinforced layer, a second braided fiber reinforced layer formed in the outer periphery of the intermediate rubber layer and an outer rubber layer formed in the outer periphery of the second braided fiber reinforced layer, wherein the first braided fiber reinforced layer is formed of fibers having 950 deniers to 1050 deniers, the thickness of the first braided fiber reinforced layer being 0.30 mm to 0.50 mm.Type: GrantFiled: August 19, 1996Date of Patent: October 14, 2003Assignee: Hitachi Cable, Ltd.Inventors: Hideki Hagiwara, Yoji Kobayashi
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Patent number: 6626211Abstract: A brake hose includes two reinforcing layers in a rubber base. The brake hose comprises an inner tube rubber layer having a flow path for flowing fluid, a lower yarn layer formed by braiding first yarns around the inner tube rubber layer and an upper yarn layer formed by braiding second yarns around the lower yarn layer and a cover rubber layer covering the upper yarn layer. A lower yarn layer duty LD given by the equation, LD(%)=(LRP/PRP)×100, has a value of 50-65%, where LRP denotes an inner pressure at which a brake hose without the upper yarn layer and the cover would burst, and PRP denotes an inner pressure at which the brake hose would burst.Type: GrantFiled: November 25, 2002Date of Patent: September 30, 2003Assignee: Toyoda Gosei Co., Ltd.Inventors: Satoshi Mizutani, Kenichiro Furui, Taizo Ogawa
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Publication number: 20030178084Abstract: Pipe (1) for conveying a fluid. It comprises a metal tube (2). The inner wall of the metal tube is coated with a layer (3) of a porous material permeable to the fluid conveyed. The fluid circulates in layer (3) in order to limit the pressure drops generated by the flow.Type: ApplicationFiled: March 18, 2003Publication date: September 25, 2003Inventor: Yves Charron
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Patent number: 6619330Abstract: A fuel hose which is less permeable to an automotive fuel and highly resistant to a sour gasoline. The fuel hose comprises at least one layer including an innermost layer which comprises a thermoplastic polybutylene terephthalate elastomer containing a dimer acid moiety.Type: GrantFiled: January 24, 2003Date of Patent: September 16, 2003Assignee: Tokai Rubber Industries, Ltd.Inventors: Hiroaki Ito, Hirokazu Kitamura
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Patent number: 6615877Abstract: A multilayer tubing for conveying liquid, especially motor vehicle fuel in a motor vehicle is extruded with an outer layer composed of nylon 12, an intermediate layer composed of an ethylene vinyl alcohol copolymer and an electrically-conductive inner layer composed of nylon 6 or nylon 12 and compounded with at most 30% by weight of conductive carbon black or graphite fibril.Type: GrantFiled: May 30, 2001Date of Patent: September 9, 2003Assignee: TI Group Automotive Systems (Fuldabruck) GmbHInventors: Werner Zimmer, Kurt Apel, Thorsten Otto
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Publication number: 20030150503Abstract: A fuel hose which is less permeable to an automotive fuel and highly resistant to a sour gasoline. The fuel hose comprises at least one layer including an innermost layer which comprises a thermoplastic polybutylene terephthalate elastomer containing a dimer acid moiety.Type: ApplicationFiled: January 24, 2003Publication date: August 14, 2003Applicant: TOKAI RUBBER INDUSTRIES, LTD.Inventors: Hiroaki Ito, Hirokazu Kitamura
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Patent number: 6604552Abstract: Metal-plastic multilayer pipe with a plastic inner pipe (30) and a metal sheath (32) around the plastic inner pipe (30), where the metal sheath (32) is of uniform thickness, is applied to the plastic inner pipe (30) so that it completely encircles the plastic inner pipe (30) and a practical plastic outer layer (38), with the feature that the thickness of the metal sheath (32) as compared to the total thickness of all layers of the multilayer pipe (32, 34 and 38), is sufficiently thin that the metal sheath (32) accounts for a negligible part of the overall strength and stiffness of the multilayer pipe and, as a consequence, when the multilayer pipe is bent in an arc, the metal sheath (32) offers negligible resistance to such bending as compared to the resistance offered by the inner pipe (30) and the practical cover layer (38), and when so bent, the multilayer pipe tends to remain bent in said arc, whereby, the multilayer pipe has “form stability”.Type: GrantFiled: March 28, 2001Date of Patent: August 12, 2003Inventors: Jorg Hansen, Reinhold Freermann, Alfred Feldkamp, Franz-Josef Riesselmann
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Patent number: 6605327Abstract: A multilayer automotive hose includes an innermost layer of elastomer material, and a separate outermost layer of elastomer material, each including between about 40% and about 80% vinylacetate by weight in a copolymer. The elastomer layers are formed by an extrusion process. The vinylacetate is copolymerized with polyethylene. Each of the elastomer layers has a fully saturated backbone. As a result, each of the innermost and outermost layers is a non-thermoplastic elastomer.Type: GrantFiled: October 16, 2000Date of Patent: August 12, 2003Assignee: Dana CorporationInventors: Marty A. Ramey, Ron H. Moody
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Publication number: 20030136457Abstract: A fuel hose which satisfies low-permeability requirements in conformity with stringent regulations against vapor emission of fuel gases, is halogen-free and has excellent hydrolysis resistance, inter-layer adhesiveness and low-temperature flexibility.Type: ApplicationFiled: January 24, 2003Publication date: July 24, 2003Applicant: TOKAI RUBBER INDUSTRIES, LTD.Inventors: Hiroaki Ito, Hirokazu Kitamura
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Publication number: 20030131899Abstract: An impermeable rubber hose is thinned for the purpose of reducing weight and costs. A rigid resin film is used as an intermediate layer. When the resin film is gradually rolled up into a cylindrical shape from a planar shape and fed to an extrusion head and rubber is simultaneously extrusion-molded inside and outside the cylindrical film, the film produces a break or a twist to make extrusion molding difficult. It is an object of the present invention to make simultaneous extrusion molding possible even in such a condition.Type: ApplicationFiled: June 24, 2002Publication date: July 17, 2003Inventors: Hiroki Baba, Yuji Hirano, Hiromi Fujii, Takafumi Matano
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Patent number: 6588456Abstract: The present invention relates to a pressure-resistant hose and forming method thereof, which is capable of effectively spouting liquid or gas of high pressure even though the pressure-resistant hose is of a relatively small thickness, reducing the material cost of the pressure-resistant hose and improving the flexibility of the pressure-resistant hose. The Pressure-resistant hose comprises a first polyethylene mixture and one or more second hose layers. The first hose layer is formed by bonding together longitudinal ends of a first polyethylene mixture fabric coated with one or two watertight films at one or both surfaces of the first polyethylene mixture fabric. Each of said second hose layers if formed by bonding together longitudinal ends of a second polyethylene mixture fabric coated with one or two watertight films at one or both surfaces of the second polyethylene mixture fabric.Type: GrantFiled: October 5, 2001Date of Patent: July 8, 2003Inventor: In Seon Jeong
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Publication number: 20030121560Abstract: A resinous tube which has a low permeability for alcohol-contained fuel in addition to usual gasoline and is sufficiently high in adhesiveness between a barrier layer (permeation-interrupting layer) and a protecting layer (layer covering the permeation-interrupting layer), is easy in reuse of marginal materials and the like, and is a low cost material arrangement is furnished. This resinous tube is formed by laminating pipe-shaped resin layers, in which a main component of at least one layer of layers constituting the tube is a resin such as PBT, PBN, PET, PEN or the like, and a main component of a layer other than the above-mentioned layer is PBT copolymer. The PBT copolymer contains an acid component and a glycol component.Type: ApplicationFiled: November 4, 2002Publication date: July 3, 2003Inventors: Katsumi Morohoshi, Hiroshi Kumagai, Tetsuya Enomoto
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Patent number: 6581643Abstract: A transport tube for transporting a motor vehicle fluid, in particular a coolant, which tube comprises: an inner layer (1) made of vulcanized elastomer material; an outer layer (2) made of thermoplastic material that withstands the coolant chemically and that is impermeable thereto; and an intermediate bonding layer (3) made of a material that is compatible with the materials of the inner and outer layers.Type: GrantFiled: May 30, 2002Date of Patent: June 24, 2003Assignee: Nobel PlastiquesInventors: Jérôme Guippe, Pierre Milhas
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Publication number: 20030098082Abstract: A brake hose includes two reinforcing layers in a rubber base. The brake hose comprises an inner tube rubber layer having a flow path for flowing fluid, a lower yarn layer formed by braiding first yarns around the inner tube rubber layer and an upper yarn layer formed by braiding second yarns around the lower yarn layer and a cover rubber layer covering the upper yarn layer.Type: ApplicationFiled: November 25, 2002Publication date: May 29, 2003Inventors: Satoshi Mizutani, Kenichiro Furui, Taizo Ogawa
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Publication number: 20030098085Abstract: An automotive fuel hose which satisfies low permeability requirements in conformity with stringent regulations against vapor emission of hydrocarbons and alcohol-containing hydrocarbons, and is less permeable to hydrogen and excellent in sour gasoline resistance and inter-layer adhesion. The automotive fuel hose comprises: an inner layer (1) comprising one of a fluororesin and a polyolefin resin; and a low permeability layer (2) comprising a polybutylene naphthalate; the inner layer (1) having a plasma-treated outer peripheral surface (1a); the low permeability layer (2) being provided on the plasma-treated surface (1a) of the inner layer (1).Type: ApplicationFiled: October 25, 2002Publication date: May 29, 2003Applicant: TOKAI RUBBER INDUSTRIES, LTD.Inventors: Hiroaki Ito, Kazutaka Katayama, Junichiro Suzuki
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Publication number: 20030098083Abstract: A brake hose comprises reinforcing layers in a rubber base. The brake hose comprising an inner tube rubber layer that is made of a rubber material and has a flow path for flowing fluid; a lower yarn layer formed by braiding lower yarn around the inner tube rubber layer; an intermediate rubber layer made of a rubber material and located around the lower yarn layer; an upper yarn layer formed by braiding upper yarn around the intermediate rubber layer; and a cover rubber layer formed around the upper yarn layer. The intermediate rubber layer is formed from a sheet material having a Mooney viscosity of 10-40 Mv (minimum Mooney value) at 145° C.Type: ApplicationFiled: November 25, 2002Publication date: May 29, 2003Inventors: Satoshi Mizutani, Kenichiro Furui, Taizo Ogawa
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Publication number: 20030084950Abstract: A cable for laying in plastic tubes for transporting gas or water is described that comprises a cable core assembly and a plastic sheath surrounding the cable core assembly, in which cable the plastic used for the plastic tube and the plastic for the sheath can be welded together.Type: ApplicationFiled: November 1, 2002Publication date: May 8, 2003Applicant: ALCATELInventors: Klaus Nothofer, Hans-Detlef Leppert
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Publication number: 20030079791Abstract: A flexible pipe and a method of manufacturing same according to which an inner sheath is surrounded by at least one tensile layer, and an outer sheath of polymeric material consisting of an olefin polymer blended with at least one thermoset elastomer is disposed around the tensile layer.Type: ApplicationFiled: October 23, 2002Publication date: May 1, 2003Applicant: Wellstream, Inc.Inventor: Brian Scott Wilson
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Patent number: 6555243Abstract: Thermoplastic multilayer composite, particularly in the form of a multilayer hose, a multilayer pipe or a multilayer container, containing at least one intermediate layer made of a molding compound on the basis of ethylene/vinyl alcohol copolymers between layers made of molding compounds on the basis of polyamide, the intermediate layer being bonded via at least one adhesion-promoting layer made of a molding compound on the basis of polyamide selected from the group of copolyamide 6/12, block copolyamide 6/12, polyamide 612, polyamide 610, a mixture of polyamide 6 and polyamide 12 with compatibilizer, a mixture of polyamide 6 and polyamide 11 with compatibilizer, with at least one neighboring layer made of a molding compound on the basis of polyamide 12, polyamide 11, polyamide 1010, polyamide 1012, or polyamide 1212.Type: GrantFiled: May 23, 2001Date of Patent: April 29, 2003Assignee: EMS-Chemie AGInventors: Albert Flepp, Michael Hoffmann
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Patent number: 6550500Abstract: A plastic pipe provided with a socket and a method of providing a plastic pipe with a socket, whereby the socket comprises at least two layers. The orientation of at least one socket layer is different from the orientation of another layer and the orientation of at least one layer is different from the orientation of a body portion of the plastic pipe. The socket is made for instance from a plastic pipe comprising at least two layers. The orientation temperatures of at least two different layers are different. The plastic pipe is heated to a temperature at which the material of at least one layer is oriented during expansion and the material of at least one layer is substantially not oriented during expansion. The end of the plastic pipe is expanded at said temperature so as to provide it with a socket.Type: GrantFiled: October 1, 2001Date of Patent: April 22, 2003Assignee: Uponor Innovation AbInventors: Jyri Järvenkylä, Esko Hippeläinen
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Patent number: 6536479Abstract: A hose comprising a core layer, at least one reinforcement layer, and a cover layer, the core layer is comprised of inner and outer core layers, the hose being characterized by the inner core layer and the outer core layer being formed from different non-plasticized polyamides and are co-extruded at the time of formation. The hose has a permeation rate of less than 0.5 g/m/day.Type: GrantFiled: May 9, 2002Date of Patent: March 25, 2003Assignee: The Goodyear Tire & Rubber CompanyInventors: Reji Paul Wilson, Brian Henry, Pradeep Dattatraya Nadkarni
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Patent number: 6537630Abstract: The blow-molded hose of a synthetic resin of the present invention is produced by blow-molding a single parison comprising a soft resin and a hard resin. The blow-molded hose comprises a monolayer (or single-layer) segment formed with either a soft resin layer or a hard resin layer and multilayer laminating) segment formed with the soft resin layer and the hard resin layer, wherein, in the multilayer (laminating) segment, the thickness of the resin layer forming the monolayer segment is thinner than that of the other resin layer. Practically, the monolayer segment comprises the soft resin layer and forms the connection end(s) at the end(s) of the hose.Type: GrantFiled: August 31, 2000Date of Patent: March 25, 2003Assignee: Tigers Polymer CorporationInventor: Masaaki Ogawa