Patents by Inventor Andreas Dowe

Andreas Dowe 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: 11504939
    Abstract: A flexible pipe of multilayer structure with unbonded layers, where the pipe has an interior lining which comprises the following layers: a) at least one layer of which the material is composed of a moulding composition based on a polymer selected from the group of: polyarylene ether ketone, polyphenyl sulphone, polyphenylene sulphide, polyarylene ether ketone/polyphenylene sulphide blend and semiaromatic polyamide, where from 5 to 100 mol % of the dicarboxylic acid content thereof derives from an aromatic dicarboxylic acid having from 8 to 22 carbon atoms, and which has a crystallite melting point Tm of at least 260° C.; b) at least one layer of which the material is composed of a fluoropolymer moulding composition can be operated at temperatures above 130° C. The pipe has particular suitability for offshore applications in the production of oil or of gas.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: November 22, 2022
    Assignee: EVONIK OPERATIONS GmbH
    Inventors: Karl Kuhmann, Andreas Dowe, Rainer Goering
  • Patent number: 10323707
    Abstract: A vehicle disk brake has a brake-application device providing a braking force and has a force element and a pressure-boosting lever arrangement. A readjustment device for compensatory readjustment of the wear-induced air clearance of the brake is provided that has a rotatably arranged drive element to be actuated by the brake-application device, a readjustment element arranged rotatably on the same axis, and a transmission device arranged in the movement path between drive element and readjustment element. To provide a readjustment device of a structurally simple design with a small number of parts, the transmission device is in the form of a helical wrap spring which is radially supported at the inner side along a first helix section relative to the drive element and is radially supported at the outer side along a second helix section relative to the readjustment element.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: June 18, 2019
    Assignee: BPW Bergische Achsen KG
    Inventors: Michael Pehle, Günter Dowe, Andreas Dowe
  • Patent number: 10309472
    Abstract: A disk brake is proposed for a vehicle, preferably a commercial vehicle, having a brake caliper, a brake application device, an adjusting device, a brake lever, and a mechanism which couples the brake lever to the drive element. The brake caliper engages over a brake disk and brake linings on both sides of the brake disk. The brake application device can be actuated by way of a force element, preferably a pneumatic force element. The adjusting device compensates for the brake lining and brake disk wear. The adjusting device is arranged on an adjusting axis which extends in the brake application direction, and is provided with a drive element which can be rotated about the adjusting axis.
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: June 4, 2019
    Assignee: BPW BERGISCHE ACHSEN KG
    Inventors: Thomas Klaas, Michael Pehle, Andreas Dowe
  • Patent number: 10113671
    Abstract: A process for the production of a pipe comprising: an interior surface having a shape; and a thermoplastic inliner is provided. The process comprises: introducing the thermoplastic inliner into the interior of the pipe; heating the pipe from the outside to a temperature higher than a crystallite melting point (Tm) of a molding composition of an exterior surface of the inliner; expanding the inliner radially in the pipe so that an exterior surface of the inliner assumes the shape of the interior surface of the pipe; and cooling the inliner; wherein a cross section of the inliner is optionally reduced through exposure to an exterior force prior to being introduced into the pipe. Relative movements between carrier pipe and inliner are thus prevented; the risk of collapse of the inliner is moreover low. The pipe is used for the production of a laid pipeline.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: October 30, 2018
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Juergen Franosch, Jan Berger, Andreas Dowe, Marco Gensheimer, Uwe Kannengiesser
  • Patent number: 10072786
    Abstract: A metal conduit pipe, which is covered with an extruded layer made of polyamide molding compound, is used to produce a duct laid in water, wherein in the course of laying the duct, the coating is exposed to a shearing pressure load and/or a bending load due to laying method selected.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: September 11, 2018
    Assignees: Evonik Degussa GmbH, Salzgitter Mannesmann Line Pipe GmbH
    Inventors: Andreas Dowe, Rainer Goering, Hans-Juergen Kocks, Joern Winkels
  • Patent number: 9919494
    Abstract: A metallic pipe for contact with a hydrolyzing medium provides longer operating times and improved high temperature resistance. The pipe contains a layer of a polyamide moulding composition containing at least 50% by weight of polyamide content containing: I) 60 to 98 parts by weight of a polyamide which contains 10 to 70 meq/kg of a terminal carboxy group and has a relative solution viscosity ?rel of at least 1.90, and II) 2 to 40 parts by weight of a polyamine-polyamide graft copolymer produced from: a) 0.5 to 25% by weight, based on the entire monomer mixture, of a polyamine having at least 4 nitrogen atoms, and b) 75 to 99.5% by weight, based on the entire monomer mixture, of polyamide-forming monomers selected from lactams, ?-aminocarboxylic acids and/or equimolar combinations of diamine and dicarboxylic acid, with the proviso that the amino group concentration of the graft copolymer is in the range from 100 to 2500 meq/kg, wherein the sum of the parts by weight of I) and II) is 100.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: March 20, 2018
    Assignee: Evonik Degussa GmbH
    Inventors: Juergen Franosch, Franz-Erich Baumann, Horst Beyer, Andreas Dowe, Andreas Pawlik
  • Publication number: 20170370434
    Abstract: A disk brake is proposed for a vehicle, preferably a commercial vehicle, having a brake caliper which engages over a brake disk and brake linings on both sides of the brake disk, a brake application device (5) which can be actuated by way of a force element, preferably a pneumatic force element, an adjusting device (20) for compensating for the brake lining and brake disk wear, which adjusting device (20) is arranged on an adjusting axis (L) which extends in the brake application direction, and is provided with a drive element (27) which can be rotated about the adjusting axis (L), and a brake lever (10) which is a constituent part of the brake application device (5) and is composed of a brake application shaft (11) which on one hand is supported in relation to the brake caliper and on the other hand in relation to a pressure piece (8) which operates against one of the brake linings, and a lever arm (12) which can be pivoted with the brake application shaft (11) and the pivoting center line of which extend
    Type: Application
    Filed: January 11, 2016
    Publication date: December 28, 2017
    Inventors: Thomas KLAAS, Michael PEHLE, Andreas DOWE
  • Publication number: 20170175837
    Abstract: The invention relates to a vehicle disk brake having a brake-application device which provides the braking force and which is composed of a force element, preferably a pressure medium cylinder, and of a pressure-boosting lever arrangement, and having a readjustment device for compensatory readjustment of the wear-induced air clearance of the brake. The readjustment device comprises, as constituent parts, a rotatably arranged drive element (25) which can be actuated by the brake-application device, a readjustment element (26) arranged rotatably on the same axis, and a transmission device arranged in the movement path between drive element (25) and readjustment element (26).
    Type: Application
    Filed: February 2, 2015
    Publication date: June 22, 2017
    Inventors: Michael Pehle, Günter Dowe, Andreas Dowe
  • Patent number: 9574700
    Abstract: A pipeline laid trenchlessly and/or without a sand bed is produced using a metallic conduit which is encased with an extruded layer of a polyamide molding material. In this way, the durability of the outer shell required for trenchless laying techniques without a sand bed is ensured.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: February 21, 2017
    Assignees: Evonik Degussa GmbH, Salzgitter Mannesmann Line Pipe GmbH
    Inventors: Andreas Dowe, Rainer Goering, Martin Risthaus, Klaus Gahlmann, Reinhard Buessing, Hans-Juergen Kocks, Joern Winkels
  • Patent number: 9551441
    Abstract: A pipe or pipeline for use in the oil and gas industry for conveying lines, collection pipelines and transport pipelines with reduced operating risk and increased lifetime is provided. The pipe contains: a) an external reinforcement layer and b) an internal liner which comprises securely bonded to one another: I) a layer made of a thermoplastic molding composition selected from a polyolefin molding composition and a fluoropolymer molding composition and II) a layer made of a polyamide molding composition, wherein not only the polyamide molding composition but also the molding composition of the layer according to I) in essence comprises no blend component which is composed of another polymer and which has disperse distribution in the molding composition.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: January 24, 2017
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Andreas Dowe, Juergen Franosch, Jan Berger, Claudia Behrens
  • Patent number: 9314989
    Abstract: The invention relates to a flexible pipe having a multi-layered structure comprising unbonded layers, comprising an inner lining having the following layer arrangement: a) an innermost layer made of a fluoropolymer molding compound, b) an intermediate layer made of a molding compound on the basis of an olefinic polymer, which is selected from the group consisting of polyethylene, isotactic polypropylene, syndiotactic polypropylene and syndiotactic polystyrene, c) an outer layer made of a polyamide molding compound, wherein the layer made of a polyamide molding compound is particularly efficiently protected against hydrolysis. The pipe is thus particularly suited for offshore applications in oil or gas production.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: April 19, 2016
    Assignee: Evonik Degussa GmbH
    Inventors: Karl Kuhmann, Andreas Dowe, Rainer Goering
  • Patent number: 9309998
    Abstract: The invention relates to a flexible tube of multilayer construction having unbonded layers, wherein at least one layer is formed in that a tape made of a plastic molding compound is spirally wound about a further inner layer, wherein the upper and lower layers of the tape are simultaneously or subsequently welded to each other at overlapping regions.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: April 12, 2016
    Assignee: Evonik Degussa GmbH
    Inventors: Karl Kuhmann, Andreas Dowe, Rainer Goering
  • Publication number: 20160060459
    Abstract: A metallic pipe for contact with a hydrolyzing medium provides longer operating times and improved high temperature resistance. The pipe contains a layer of a polyamide moulding composition containing at least 50% by weight of polyamide content containing: I) 60 to 98 parts by weight of a polyamide which contains 10 to 70 meq/kg of a terminal carboxy group and has a relative solution viscosity ?rel of at least 1.90, and II) 2 to 40 parts by weight of a polyamine-polyamide graft copolymer produced from: a) 0.5 to 25% by weight, based on the entire monomer mixture, of a polyamine having at least 4 nitrogen atoms, and b) 75 to 99.5% by weight, based on the entire monomer mixture, of polyamide-forming monomers selected from lactams, ?-aminocarboxylic acids and/or equimolar combinations of diamine and dicarboxylic acid, with the proviso that the amino group concentration of the graft copolymer is in the range from 100 to 2500 meq/kg, wherein the sum of the parts by weight of I) and II) is 100.
    Type: Application
    Filed: August 25, 2015
    Publication date: March 3, 2016
    Applicant: Evonik Degussa GmbH
    Inventors: Juergen FRANOSCH, Franz-Erich BAUMANN, Horst BEYER, Andreas DOWE, Andreas PAWLIK
  • Patent number: 9151418
    Abstract: A flexible pipe of multilayer structure which comprises the following layers, from the inside to the outside: an interior lining; an inner reinforcement layer; a layer of molded electrically conductive plastic; an outer reinforcement layer; and an exterior sheath. The electrically conductive plastic layer is in electrical contact with the two reinforcement layers, and the two reinforcement layers can be connected to a source of electrical current. It is thus possible to achieve efficient heating of the pipe, and it can therefore be used for conveying oil in cold regions.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: October 6, 2015
    Assignee: Evonik Degussa GmbH
    Inventors: Rainer Goering, Andreas Dowe, Karl Kuhmann, Maximilian Gruhn, Juergen Franosch
  • Patent number: 9133965
    Abstract: A flexible pipe which can be heated efficiently, and may therefore be used for conveying oil in cold regions, is provided. The pipe comprises in order from inside to outside: an interior lining; a wound tape; and at least one reinforcement layer. The wound tape contains a first exterior layer of a plastics molding composition that is not electrically conductive; an intermediate layer of an electrically conductive plastics molding composition; and a second exterior layer of a plastics molding composition that is not electrically conductive. A volume resistivity to IEC 60093 of the intermediate layer is in the range from 10?3 to 1010 ?m, and the intermediate layer comprises at least two metallic conductors embedded into the plastic molding composition along an entire length of the tape in such a way that, the two conductors do not touch one another.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: September 15, 2015
    Assignee: Evonik Degussa GmbH
    Inventors: Rainer Goering, Andreas Dowe, Karl Kuhmann, Maximilian Gruhn, Juergen Franosch
  • Patent number: 9057466
    Abstract: A molding composition which comprises at least 50% by weight of the following constituents: a) from 0 to 99 parts by weight of polyamide, and b) from 1 to 100 parts by weight of polyamide elastomer, selected from the group of polyetheresteramide and polyetheramide, where the total of the parts by weight is 100 and where the molding composition comprises from 0 to 9% by weight of plasticizer, is used for the production of a molding for contact with a supercritical medium, and preferably for the production of an inner thermoplastics layer in a flexible pipe or rigid pipe, in which a supercritical medium is conveyed. Low or zero plasticizer content eliminates any significant occurrence of problems such as increased stiffness and longitudinal shrinkage.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: June 16, 2015
    Assignee: Evonik Degussa GmbH
    Inventors: Andreas Dowe, Reinhard Beuth, Franz-Erich Baumann
  • Patent number: 8999086
    Abstract: A molding compound for joining two moldings each made of a PA11 and/or PA12 molding compound contains at least 50% by weight of a polyamide component so chosen that it is preparable from linear aliphatic diamines and dicarboxylic acids and/or lactams or ?-aminocarboxylic acids, there being 11 to 12 carbon atoms present per carboxamide group in the repeating units, and, furthermore, this polyamide component containing not more than 80% by weight of either one of the polyamides PA11 and PA12. With this compound a firm weld is obtained both to a PA11 molding and to a PA12 molding.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: April 7, 2015
    Assignee: Evonik Degussa GmbH
    Inventors: Sonja Bollmann, Rainer Goering, Franz-Erich Baumann, Andreas Dowe, Vera Schiemann
  • Publication number: 20140290782
    Abstract: A pipe or pipeline for use in the oil and gas industry for conveying lines, collection pipelines and transport pipelines with reduced operating risk and increased lifetime is provided. The pipe contains: a) an external reinforcement layer and b) an internal liner which comprises securely bonded to one another: I) a layer made of a thermoplastic moulding composition selected from a polyolefin moulding composition and a fluoropolymer moulding composition and II) a layer made of a polyamide moulding composition, wherein not only the polyamide moulding composition but also the moulding composition of the layer according to I) in essence comprises no blend component which is composed of another polymer and which has disperse distribution in the moulding composition.
    Type: Application
    Filed: March 26, 2014
    Publication date: October 2, 2014
    Applicant: Evonik Industries AG
    Inventors: Andreas Dowe, Juergen Franosch, Jan Berger, Claudia Behrens
  • Publication number: 20140291032
    Abstract: A process for the production of a pipe comprising: an interior surface having a shape; and a thermoplastic inliner is provided. The process comprises: introducing the thermoplastic inliner into the interior of the pipe; heating the pipe from the outside to a temperature higher than a crystallite melting point (Tm) of a moulding composition of an exterior surface of the inliner; expanding the inliner radially in the pipe so that an exterior surface of the inliner assumes the shape of the interior surface of the pipe; and cooling the inliner; wherein a cross section of the inliner is optionally reduced through exposure to an exterior force prior to being introduced into the pipe. Relative movements between carrier pipe and inliner are thus prevented; the risk of collapse of the inliner is moreover low. The pipe is used for the production of a laid pipeline.
    Type: Application
    Filed: March 25, 2014
    Publication date: October 2, 2014
    Applicant: Evonik Industries AG
    Inventors: Juergen FRANOSCH, Jan BERGER, Andreas DOWE, Marco GENSHEIMER, Uwe KANNENGIESSER
  • Patent number: 8697814
    Abstract: A polyamide molding composition is condensed up in the melt by means of a masterbatch containing a compound having at least two carbonate units and also a polyetheramide in which at least 50% of the end groups are present as amino end groups, whereupon the melt mixture is discharged and solidified to give a molding composition or a molding. The product obtained has an increased amino end group content and consequently an improved hydrolysis resistance.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: April 15, 2014
    Assignee: Evonik Degussa GmbH
    Inventors: Andreas Dowe, Reinhard Beuth, Franz-Erich Baumann