Patents by Inventor Ralf Koehnen
Ralf Koehnen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10583802Abstract: A method of weaving fabric for use in the manufacture of a vehicle air-bag includes: providing a weaving reed having a plurality of adjacent cells; introducing regular warp yarns into at least some of the cells; introducing an additional warp yarn into one of the cells that already includes a regular warp yarn; and carrying out a weaving process. In the weaving process, weft yarns are interwoven with the regular warp yarns and the additional warp yarn. The regular warp yarns each remain within one cell throughout the weaving process. The additional warp yarn is moved from a first cell to a second cell during the weaving process.Type: GrantFiled: January 14, 2014Date of Patent: March 10, 2020Assignee: AUTOLIV DEVELOPMENT ABInventors: Brita Hirsch, Ralf Koehnen
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Publication number: 20150360639Abstract: A method of weaving fabric for use in the manufacture of a vehicle air-bag includes: providing a weaving reed having a plurality of adjacent cells; introducing regular warp yarns into at least some of the cells; introducing an additional warp yarn into one of the cells that already includes a regular warp yarn; and carrying out a weaving process. In the weaving process, weft yarns are interwoven with the regular warp yarns and the additional warp yarn. The regular warp yarns each remain within one cell throughout the weaving process. The additional warp yarn is moved from a first cell to a second cell during the weaving process.Type: ApplicationFiled: January 14, 2014Publication date: December 17, 2015Applicant: Autoliv Development ABInventors: Brita HIRSCH, Ralf KOEHNEN
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Patent number: 8991855Abstract: A fabric for use in the manufacture of an inflatable air-bag, the fabric having interwoven warp fibers and weft fibers which are arranged substantially perpendicular to one another, one or more of the warp and weft fibers being at least partially coated with an adhesive substance to increase the friction between the warp and weft fibers at their intersections. In another embodiment, the fabric is formed from fibers having a central core and another sheath.Type: GrantFiled: March 9, 2012Date of Patent: March 31, 2015Assignee: Autoliv Development ABInventors: Altay Kismir, David Stow, Gary Wootton, Hugh Finn, Ralf Koehnen
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Patent number: 8733788Abstract: A method of forming a fabric for an air-bag, the method comprising providing a plurality of yarns, each yarn being formed from a plurality of individual fibres; applying an activatable additive or coating to each yarn, the additive or coating initially not being activated and wherein, prior to activation, the additive or coating presents little or no impedance to the relative movement of the fibres within the yarn and, following activation, the additive or coating binds fibres within the yarn to one another to prevent or hinder relative movement of the fibres in the yarn with respect to one another; and passing the yarns through an activation zone including a compressing component which applies a compressive force to the yarns, the additive or coating being activated as the yarns pass through the activation zone so that the yarns each have a substantially flat configuration.Type: GrantFiled: March 17, 2011Date of Patent: May 27, 2014Assignee: Autoliv Development ABInventors: Hugh Finn, Ralf Koehnen, David Stow, Gary Wootton, Altay Kismir, Will Winzinger, Gonzalo Alves
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Publication number: 20140021700Abstract: A fabric for use in the manufacture of an inflatable air-bag, the fabric having interwoven warp fibres and weft fibres which are arranged substantially perpendicular to one another, one or more of the warp and weft fibres being at least partially coated with an adhesive substance to increase the friction between the warp and weft fibres at their intersections. In another embodiment, the fabric is formed from fibres having a central core and another sheath.Type: ApplicationFiled: March 9, 2012Publication date: January 23, 2014Applicant: Autoliv Development ABInventors: Altay Kismir, David Stow, Gary Wootton, Hugh Finn, Ralf Koehnen
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Publication number: 20130140800Abstract: An airbag having an outer skin enclosing at least one gas chamber is disclosed. The outer skin is made at least in parts of polymer material with the polymers of the polymer material being made by polymerisation of monomers. In order to reduce the total consumption of fossil based raw materials during the life cycle of a vehicle, at least a part of the monomers are sustainable based monomers being produced from a renewable raw material.Type: ApplicationFiled: August 3, 2011Publication date: June 6, 2013Applicant: Autoliv Development ABInventors: Ralf Koehnen, David Stow, Hugh Finn
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Publication number: 20130026740Abstract: A method of forming a fabric for an air-bag, the method comprising providing a plurality of yarns, each yarn being formed from a plurality of individual fibres; applying an activatable additive or coating to each yarn, the additive or coating initially not being activated and wherein, prior to activation, the additive or coating presents little or no impedance to the relative movement of the fibres within the yarn and, following activation, the additive or coating binds fibres within the yarn to one another to prevent or hinder relative movement of the fibres in the yarn with respect to one another; and passing the yarns through an activation zone including a compressing component which applies a compressive force to the yarns, the additive or coating being activated as the yarns pass through the activation zone so that the yarns each have a substantially flat configuration.Type: ApplicationFiled: March 17, 2011Publication date: January 31, 2013Applicant: AUTOLIV DEVELOPMENT ABInventors: Hugh Finn, Ralf Koehnen, David Stow, Gary Wootton, Altay Kismir, Will Winzinger, Gonzalo Alves
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Patent number: 7538049Abstract: Airbag fabric with warp and weft yarns in which at least most of the weft yarns in the fabric comprise at least two contiguous yarns, characterised in that at least one of the contiguous yarns is an intermingled multifilament yarn, some filaments of the multifilament yarn being intermingled with some filaments of the yarns adjacent to it.Type: GrantFiled: May 13, 2006Date of Patent: May 26, 2009Assignee: Polyamide High Performance GmbHInventor: Ralf Köhnen
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Patent number: 7316843Abstract: A melt-spun synthetic fiber and process for producing the fiber are described, the fiber including a fiber-forming synthetic polymer and a siloxane-based polyamide with a repeating unit having the formula (I) wherein n is a number in the range of 1-500 inclusive and specifics the number of repeating units of the siloxane-based polyamide, DP is the average degree of polymerization of the siloxane component of the siloxane-based polyamide and is in the range of 1-700 inclusive, X is selected from the group consisting of linear or branched alkylene chains having 1-30 carbon atoms, Y is selected from the group consisting of linear or branched alkylene chains having 1-40 carbon atoms, and each of the R1-R4 groups is independently selected from the group consisting of methyl groups, ethyl groups, propyl groups, isopropyl groups, siloxane chains, phenyl groups, and phenyl groups that have been substituted with 1-3 members selected from the group consisting of methyl groups and ethyl groups.Type: GrantFiled: May 17, 2004Date of Patent: January 8, 2008Assignee: Polyamide High Performance GmbHInventors: Samuel Mooney, Ralf Koehnen, Britta Konrad, Qiao Xiao, Ralf Schnell
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Publication number: 20040214962Abstract: A melt-spun synthetic fiber and process for producing the fiber are described, the fiber including a fiber-forming synthetic polymer and a siloxane-based polyamide with a repeating unit having the formula (I) 1Type: ApplicationFiled: May 17, 2004Publication date: October 28, 2004Applicant: Polyamide High Performance GmbHInventors: Samuel Mooney, Ralf Koehnen, Britta Konrad, Qiao Xiao, Ralf Schnell
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Publication number: 20040191512Abstract: A melt-spun synthetic fiber and process for producing the fiber are described, the fiber including a fiber-forming synthetic polymer and a siloxane-based polyamide with a repeating unit having the formula (I) 1Type: ApplicationFiled: March 27, 2003Publication date: September 30, 2004Inventors: Samuel Mooney, Ralf Koehnen, Britta Konrad, Xiao Qiao, Ralf Schnell
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Patent number: 6787227Abstract: A yarn containing filaments made from synthetic polymers has a cross-section having at least 5 vertices, a titer of 1 to 7 dtex and a tenacity of at least 60 cN/tex. The filaments of the yarn preferably have a cross-section having 5 to 8 vertices, possibly with indentations between the vertices. The cross-section of the filaments is preferably star-shaped. The yarn preferably has a tenacity of 60 to 85 cN/tex, an elongation at break of 15% to 35%, a hot-air shrinkage of 4% to 10% and a stretch recovery of 250 to 400 cN/tex. The yarn is excellently suited for use in the manufacture of industrial fabrics, particularly airbag fabrics.Type: GrantFiled: April 24, 2003Date of Patent: September 7, 2004Assignee: Polyamide High Performace GmbHInventors: Ralf Koehnen, Frank Leymann, Britta Konrad, Gerhard Berberich, Hans Albert Graefe, Andreas Tulke, Qiao Xiao
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Publication number: 20030211319Abstract: A yarn containing filaments made from synthetic polymers has a cross-section having at least 5 vertices, a titer of 1 to 7 dtex and a tenacity of at least 60 cN/tex. The filaments of the yarn preferably have a cross-section having 5 to 8 vertices, possibly with indentations between the vertices. The cross-section of the filaments is preferably star-shaped. The yarn preferably has a tenacity of 60 to 85 cN/tex, an elongation at break of 15% to 35%, a hot-air shrinkage of 4% to 10% and a stretch recovery of 250 to 400 cN/tex. The yarn is excellently suited for use in the manufacture of industrial fabrics, particularly airbag fabrics.Type: ApplicationFiled: April 24, 2003Publication date: November 13, 2003Applicant: Acordis Industrial Fibers GmbHInventors: Ralf Koehnen, Frank Leymann, Britta Konrad, Gerhard Berberich, Hans Albert Graefe, Andreas Tulke, Qiao Xiao
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Patent number: 6082413Abstract: A weft stretching and detecting device for a pneumatic weaving loom has a housing or mounting (6) with a weft guide channel section (8) in axial alignment with the weft insertion channel (2A) in the reed (2) of the loom and a weft stretching channel section (12) also in said housing or mounting (6). A single weft stop motion device (13) is constructed and positioned for detecting a weft insertion fault either in the guide channel section (8) or in the stretching channel section (12).Type: GrantFiled: January 15, 1999Date of Patent: July 4, 2000Assignee: Lindauer Dornier Gesellschaft mbHInventors: Hans-Dieter Scorl, Ralf Koehnen