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).

  • Patent number: 10583802
    Abstract: 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: Grant
    Filed: January 14, 2014
    Date of Patent: March 10, 2020
    Assignee: AUTOLIV DEVELOPMENT AB
    Inventors: Brita Hirsch, Ralf Koehnen
  • Publication number: 20150360639
    Abstract: 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: Application
    Filed: January 14, 2014
    Publication date: December 17, 2015
    Applicant: Autoliv Development AB
    Inventors: Brita HIRSCH, Ralf KOEHNEN
  • Patent number: 8991855
    Abstract: 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: Grant
    Filed: March 9, 2012
    Date of Patent: March 31, 2015
    Assignee: Autoliv Development AB
    Inventors: Altay Kismir, David Stow, Gary Wootton, Hugh Finn, Ralf Koehnen
  • Patent number: 8733788
    Abstract: 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: Grant
    Filed: March 17, 2011
    Date of Patent: May 27, 2014
    Assignee: Autoliv Development AB
    Inventors: Hugh Finn, Ralf Koehnen, David Stow, Gary Wootton, Altay Kismir, Will Winzinger, Gonzalo Alves
  • Publication number: 20140021700
    Abstract: 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: Application
    Filed: March 9, 2012
    Publication date: January 23, 2014
    Applicant: Autoliv Development AB
    Inventors: Altay Kismir, David Stow, Gary Wootton, Hugh Finn, Ralf Koehnen
  • Publication number: 20130140800
    Abstract: 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: Application
    Filed: August 3, 2011
    Publication date: June 6, 2013
    Applicant: Autoliv Development AB
    Inventors: Ralf Koehnen, David Stow, Hugh Finn
  • Publication number: 20130026740
    Abstract: 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: Application
    Filed: March 17, 2011
    Publication date: January 31, 2013
    Applicant: AUTOLIV DEVELOPMENT AB
    Inventors: Hugh Finn, Ralf Koehnen, David Stow, Gary Wootton, Altay Kismir, Will Winzinger, Gonzalo Alves
  • Patent number: 7538049
    Abstract: 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: Grant
    Filed: May 13, 2006
    Date of Patent: May 26, 2009
    Assignee: Polyamide High Performance GmbH
    Inventor: Ralf Köhnen
  • Patent number: 7316843
    Abstract: 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: Grant
    Filed: May 17, 2004
    Date of Patent: January 8, 2008
    Assignee: Polyamide High Performance GmbH
    Inventors: Samuel Mooney, Ralf Koehnen, Britta Konrad, Qiao Xiao, Ralf Schnell
  • Publication number: 20040214962
    Abstract: 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) 1
    Type: Application
    Filed: May 17, 2004
    Publication date: October 28, 2004
    Applicant: Polyamide High Performance GmbH
    Inventors: Samuel Mooney, Ralf Koehnen, Britta Konrad, Qiao Xiao, Ralf Schnell
  • Publication number: 20040191512
    Abstract: 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) 1
    Type: Application
    Filed: March 27, 2003
    Publication date: September 30, 2004
    Inventors: Samuel Mooney, Ralf Koehnen, Britta Konrad, Xiao Qiao, Ralf Schnell
  • Patent number: 6787227
    Abstract: 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: Grant
    Filed: April 24, 2003
    Date of Patent: September 7, 2004
    Assignee: Polyamide High Performace GmbH
    Inventors: Ralf Koehnen, Frank Leymann, Britta Konrad, Gerhard Berberich, Hans Albert Graefe, Andreas Tulke, Qiao Xiao
  • Publication number: 20030211319
    Abstract: 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: Application
    Filed: April 24, 2003
    Publication date: November 13, 2003
    Applicant: Acordis Industrial Fibers GmbH
    Inventors: Ralf Koehnen, Frank Leymann, Britta Konrad, Gerhard Berberich, Hans Albert Graefe, Andreas Tulke, Qiao Xiao
  • Patent number: 6082413
    Abstract: 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: Grant
    Filed: January 15, 1999
    Date of Patent: July 4, 2000
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Hans-Dieter Scorl, Ralf Koehnen