EP0360648A1 - Elastische, undurchlässige Membran und damit ausgestattete hydropneumatische Akkumulatoren - Google Patents

Elastische, undurchlässige Membran und damit ausgestattete hydropneumatische Akkumulatoren Download PDF

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Publication number
EP0360648A1
EP0360648A1 EP89402381A EP89402381A EP0360648A1 EP 0360648 A1 EP0360648 A1 EP 0360648A1 EP 89402381 A EP89402381 A EP 89402381A EP 89402381 A EP89402381 A EP 89402381A EP 0360648 A1 EP0360648 A1 EP 0360648A1
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EP
European Patent Office
Prior art keywords
membrane
ethylene
vinyl alcohol
film
membrane according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89402381A
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English (en)
French (fr)
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EP0360648B1 (de
Inventor
Philippe Moureaux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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Filing date
Publication date
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0360648A1 publication Critical patent/EP0360648A1/de
Application granted granted Critical
Publication of EP0360648B1 publication Critical patent/EP0360648B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • F15B1/04Accumulators
    • F15B1/08Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00Accumulators
    • F15B2201/20Accumulator cushioning means
    • F15B2201/205Accumulator cushioning means using gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00Accumulators
    • F15B2201/30Accumulator separating means
    • F15B2201/315Accumulator separating means having flexible separating means
    • F15B2201/3151Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00Accumulators
    • F15B2201/30Accumulator separating means
    • F15B2201/315Accumulator separating means having flexible separating means
    • F15B2201/3155Accumulator separating means having flexible separating means characterised by the material of the flexible separating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00Accumulators
    • F15B2201/60Assembling or methods for making accumulators
    • F15B2201/61Assembling or methods for making separating means therefor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/23907Pile or nap type surface or component
    • Y10T428/23979Particular backing structure or composition
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249953Composite having voids in a component [e.g., porous, cellular, etc.]

Definitions

  • the present invention essentially relates to an elastic waterproof membrane.
  • hydropneumatic accumulator equipped with this membrane and used for example in motor vehicle suspensions, which accumulator is generally in the form of a sphere separated by the membrane into two chambers or compartments, one of which contains a gas such than nitrogen, and the other of which contains a liquid.
  • the membranes for a pressure accumulator must have properties of both flexibility and impermeability so as to allow good transmission of the pressures between the two compartments containing the liquid and the gas respectively.
  • Elastic membranes made from different materials have already been proposed, and in this regard, reference may be made, for example, to documents FR-A-2 443 622 and FR-A-1 494 473.
  • the known membranes made for example of a thermoplastic material of the polyurethane type have an impermeability to gas which is imperfect, which results, after a few years of use on a vehicle, by a drop in the pressure of the prevailing gas. inside the sphere fitted with the membrane, so that the sphere must be replaced to maintain the desired characteristics.
  • the present invention aims to remedy these drawbacks by proposing a membrane for suspension spheres or braking systems of vehicles, which, because of its particular constitution, presents an excellent compromise of the properties of flexibility, sealing against liquid, and gas impermeability.
  • the invention relates to an elastic waterproof membrane intended in particular to equip a hydropneumatic accumulator and to be subjected on one side to the pressure of a gas and on the other side to the pressure of a liquid.
  • this membrane comprising in combination at least two materials, and being characterized by a first material giving the membrane the required elasticity and chosen from thermoplastic polyurethanes, polyether block amides, flexible polyesters or any mixture thereof, and by a second material embedded in the mass of the first material to achieve impermeability to gas and chosen from an ethylene-vinyl alcohol copolymer, polyamides, polyvinylidene chloride or any mixture thereof.
  • the membrane according to this invention will be flexible and flexible in a temperature range which can range from -35 ° C to + 120 ° C, will resist mineral hydraulic fluid or brake fluid used on the vehicle, and will advantageously have almost permeability zero for gases, such as nitrogen in particular.
  • the membrane according to this invention results from a kneading of the above-mentioned thermoplastic polyurethane and of the copolymer ethylene vinyl alcohol, aforementioned alcohol, to produce a graft polymer according to the reaction
  • the proportion of the second material such as ethylene vinyl alcohol for example relative to the first material such as the thermoplastic polyurethane is between approximately 5 and 20%.
  • the membrane consists of at least one film based on the above grafted polymer having a thickness of between approximately 10 and 200 microns and sandwiched between at least two layers of the first aforementioned material.
  • the aforementioned graft polymer forming film results from a kneading of the first and second materials mentioned above in a proportion of 50 to 95% of the second material relative to the first material.
  • the membrane consists of at least one film of the aforementioned second material sandwiched between two layers of the aforementioned first material.
  • the aforementioned second material preferably consisting of an ethylene-vinyl alcohol copolymer
  • a third material chosen from polyamide 6, polyether amide blocks, terpolymers of ethylene, acrylic ester and maleic anhydride or other polymers of the same type acting as an adhesive, in a proportion of 5 to 20% compared to the second material.
  • the membrane consists of at least one film consisting of the second aforementioned material or by a mixture of the second and third aforementioned materials, said film being sandwiched between at least two layers of a material chosen from a polyether block amide modified with a butadiene-styrene-acrylonitrile rubber, or a mixture of polyurethane and polyether block amides modified with a butadiene-styrene-acrylonitrile rubber.
  • the ethylene-vinyl alcohol alcohol copolymer is incorporated into the polyurethane during the polymerization thereof to produce the abovementioned graft polymer.
  • the membrane according to this invention can be obtained by molding this grafted polymer.
  • the invention also relates to a hydropneumatic accumulator equipped with a membrane corresponding to any one of the above characteristics and having a considerable gain in impermeability to gases compared to known membranes, and this without altering the essential qualities of flexibility and flexibility of said membrane.
  • an elastic and waterproof membrane consists of two different materials, namely: - a first material serving as a matrix and giving the membrane the desired elasticity and flexibility, easy mounting and inflation possibilities in the sphere, as well as good chemical resistance to the liquid in the sphere, which first material is chosen among the thermoplastic polyurethanes (TPU), the polyether amide blocks (PEBA), the flexible polyesters, or a mixture or cutting in various proportions of two or more of the above materials; and a second material embedded in the mass or matrix formed by the first material and giving the membrane excellent impermeability to gases, in particular to nitrogen, which second material is chosen from an ethylene-vinyl alcohol copolymer (EVOH), polyamides such as those known under the name PA6, PA6-6, PA11 or PA12, polyvinylidene chloride (PVDC) or any mixture thereof.
  • first material is chosen among the thermoplastic polyurethanes (TPU), the polyether amide blocks (PEBA), the flexible polyesters, or a mixture or cutting in various proportions of two or
  • the proportion of the second material relative to the first material serving as a matrix is between approximately 5 and 20%.
  • the alloying of the above first and second materials is carried out by kneading at a high temperature, for example between 150 and 250 ° C.
  • This mixing can be carried out in a conventional mixer known under the name BUSS commonly used in the thermoplastics industry.
  • the mixing can also be carried out directly in the screw of a conventional press for injecting plastics, this press being used for the manufacture of the membrane.
  • a dosing hopper as is known, can be associated with the press to ensure a constant proportion of the second material relative to the first material constituting the matrix.
  • thermoplastic polyurethanes TPU
  • EVOH ethylene-vinyl alcohol copolymer
  • thermoplastic polyurethane ethylene-vinyl alcohol copolymer leading to the formation of a grafted polymer, according to the following reaction:
  • the grafting is obtained by chemical reaction of the hydroxyl groups of the ethylene-vinyl alcohol copolymer on the isocyanate groups of the thermoplastic polyurethane.
  • Thermogravimetric analyzes (ATD / ATG)
  • Thermogravimetric analyzes were carried out respectively on: - Thermoplastic polyurethane (TPU) known under the trade name DESMOPAN 385-BAYER, constituting the first material; - ethylene-vinyl alcohol copolymer (EVOH), constituting the second material; and - The graft polymer resulting from the reaction of the thermoplastic polyurethane and the ethylene-vinyl alcohol copolymer above in the respective proportions of 90% and 10%.
  • TPU Thermoplastic polyurethane
  • DESMOPAN 385-BAYER ethylene-vinyl alcohol copolymer
  • EVOH ethylene-vinyl alcohol copolymer
  • thermogravimetric analysis namely that the characteristic peaks of the copolymer d ethylene vinyl alcohol is not found in the grafted polymer, which confirms, once again, the grafting reaction.
  • Viscosity measurements with a capillary rheometer were carried out at two different temperatures, 200 and 220 ° C, and at four different shear rates, 200, 500, 1000 and 3000 s ⁇ 1, on the same materials as before, namely polyurethane thermoplastic, ethylene-vinyl alcohol copolymer and graft polymer.
  • the viscosity of TPU and EVOH was measured on granules before transformation, while that of the grafted polymer was measured on parts, that is to say after transformation.
  • thermoplastic materials can only cause the viscosity to drop as a result of the breaking of the macromolecular chains, this drop in viscosity generally being 5 to 15%.
  • the grafted polymer has a higher viscosity, especially at 220 ° C., than those of TPU and EVOH.
  • This grafting leads to the creation of new longer macromolecular chains and constituting the grafted polymer, hence a higher viscosity for this grafted polymer, since it is well known that the viscosity of the polymers is linked to the length of their macromolecular chains.
  • the applicants also carried out nitrogen impermeability measurements (at 100 ° C.) on the thermoplastic polyurethane and on the grafted polymer resulting from the reaction of 90% of thermoplastic polyurethane and 10% of ethylene-alcohol copolymer vinyl.
  • a membrane M made up of "impermeable" islands 1 of ethylene-vinyl alcohol copolymer grafted onto the matrix made up of thermoplastic polyurethane.
  • the islands 1, as can be seen in the figure, are elongated in the direction of the extrusion of the membrane and the diffusion of gas through it can only be done by bypassing these islands as materialized by the arrow F.
  • the length of the path to be traveled by the gas molecules is greatly increased, which amounts to fictitiously increasing the thickness of the membrane and therefore very greatly reducing the permeability of the membrane to gas.
  • the membrane M consists of at least one film 2 of grafted polymer, as explained above, this film having a thickness of between approximately 10 and 200 microns and being sandwiched between two layers 3 of the aforementioned first material, such as a thermoplastic polyurethane.
  • the manufacture of the membrane visible in FIG. 2 can be carried out using a bi-material injection press, commonly used in the thermoplastic processing industry.
  • the grafted polymer constituting the film 2 can be obtained by mixing thermoplastic polyurethane for example and of ethylene-vinyl alcohol copolymer (EVOH) in a proportion of 50 to 95% of EVOH by compared to thermoplastic polyurethane.
  • thermoplastic polyurethane for example and of ethylene-vinyl alcohol copolymer (EVOH) in a proportion of 50 to 95% of EVOH by compared to thermoplastic polyurethane.
  • EVOH ethylene-vinyl alcohol copolymer
  • This mixing can be carried out in a few minutes at a temperature between 150 and 250 ° C, as explained above.
  • the film 2 as can be seen in FIG. 1, contains a large number of impermeable islands forming an almost impassable gas barrier.
  • the very small thickness of the film 2 incorporated between the two layers 3 is such that the membrane M, which may have a total thickness of 2 to 4 mm, is not excessively rigid and retains all its flexibility.
  • the gain in impermeability of the membrane illustrated in FIG. 2 compared to a conventional membrane made of polyurethane is of the order of 90%, which amounts to multiplying by ten the lifetime of such a membrane equipping for example suspension spheres for motor vehicles.
  • the impermeable film 2 may simply consist of the second material mentioned at the start of this description, namely an ethylene-vinyl alcohol copolymer, a polyamide, polyvinylidene chloride or a mixture of two. or more of these materials, while the two layers 3 between which the film 2 is incorporated consist of the first material mentioned at the start of this description, namely thermoplastic polyurethane, polyether block amides, flexible polyesters or any mixture thereof this.
  • the waterproof film 2 is obtained with a bi-material injection press commonly used in the thermoplastic processing industry.
  • the thickness of this film can, as was the case in the previous embodiment, have a thickness between 10 and 200 microns.
  • the gain in impermeability is very high, that is to say of the order of 90%, compared with a conventional membrane made of polyurethane alone.
  • the film 2 consists of an ethylene-vinyl alcohol copolymer mixed with another material which may be polyamide 6, polyether block amides, terpolymers of ethylene, acrylic ester and maleic anhydride, or other polymers of the same type acting as an adhesive, and this in a proportion of 5 to 20% relative to the ethylene vinyl alcohol copolymer.
  • another material which may be polyamide 6, polyether block amides, terpolymers of ethylene, acrylic ester and maleic anhydride, or other polymers of the same type acting as an adhesive, and this in a proportion of 5 to 20% relative to the ethylene vinyl alcohol copolymer.
  • the layers 3 between which the film 2 is incorporated are made of thermoplastic polyurethane.
  • the procedure is as indicated in the previous embodiments, that is to say that a mixing of the materials is carried out for a few minutes between 150 and 250 ° C. Then, the incorporation of the waterproof film 2 between the layers 3 is carried out with a bi-material injection press of a type known per se.
  • the thickness of the film 2 must be relatively small and as defined in the previous embodiments.
  • the impermeable film 2 can be produced either from the second material cited at the start of this description, that is to say ethylene-vinyl alcohol copolymer, polyamide, polyvinylidene chloride or any mixture thereof, or in a mixture of this material with the other material mentioned above, namely polyamide 6, polyether amide blocks, terpolymer of ethylene, acrylic ester and maleic anhydride, or other polymer of the same type acting as an adhesive .
  • the film 2 is incorporated here between two layers of a material which can be either a polyether amide blocks (PEBA) modified with a butadiene-styrene-acrylonitrile rubber (NBR), or a mixture of polyurethane and a polyether amide blocks modified with butadiene-styrene-acrylonitrile rubber, this mixture being able to be made by kneading the two materials for a few minutes between 150 and 250 ° C.
  • PEBA polyether amide blocks
  • NBR butadiene-styrene-acrylonitrile rubber
  • the incorporation of the impermeable film 2 is done with a bi-material injection press, the thickness of this film being as defined above.
  • the materials used for the layers 3 of the membrane M give it additional advantages which are better resistance to high temperature due to the incorporation of butadiene-styrene-acrylonitrile rubber (NBR) and better adhesion of the film 2 to the layers 3 being given the presence of the polyamide phase in these layers made up in part of polyether amide blocks.
  • NBR butadiene-styrene-acrylonitrile rubber
  • Such a membrane can equip suspension spheres which must withstand temperatures which can reach, at a peak, 130 or 140 ° C.
  • this grafted polymer can be obtained by incorporating the ethylene-vinyl alcohol copolymer into the polyurethane during, or into the end of the polyurethane polymerization operation.
  • this allows the grafted polymer to be obtained or synthesized more directly than by only a kneading operation.
  • This material has a gain in gas impermeability of 50% compared to a non-grafted kneadable polyurethane rubber.
  • the aforementioned material which, once again, is a kneadable polyurethane rubber grafted with molecular chains of ethylene-vinyl alcohol copolymer can be molded to produce a sphere membrane using conventional techniques.
  • the advantage of this membrane is its resistance to high temperature, for example of the order of 140 ° C.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Laminated Bodies (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
  • Graft Or Block Polymers (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
EP89402381A 1988-09-20 1989-08-31 Elastische, undurchlässige Membran und damit ausgestattete hydropneumatische Akkumulatoren Expired - Lifetime EP0360648B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8812274 1988-09-20
FR8812274A FR2636638B1 (fr) 1988-09-20 1988-09-20 Membrane elastique impermeable et accumulateur hydropneumatique equipe de cette membrane

Publications (2)

Publication Number Publication Date
EP0360648A1 true EP0360648A1 (de) 1990-03-28
EP0360648B1 EP0360648B1 (de) 1991-10-02

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EP89402381A Expired - Lifetime EP0360648B1 (de) 1988-09-20 1989-08-31 Elastische, undurchlässige Membran und damit ausgestattete hydropneumatische Akkumulatoren

Country Status (6)

Country Link
US (1) US5036110A (de)
EP (1) EP0360648B1 (de)
JP (1) JP2744817B2 (de)
DE (1) DE68900297D1 (de)
ES (1) ES2027067T3 (de)
FR (1) FR2636638B1 (de)

Cited By (11)

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Publication number Priority date Publication date Assignee Title
DE9004560U1 (de) * 1990-04-23 1991-08-22 Bran + Luebbe GmbH, 2000 Norderstedt Verbundmembran
DE4117411A1 (de) * 1990-05-31 1991-12-05 Nok Corp Laminierter flaechenhafter koerper
FR2667118A1 (fr) * 1990-09-26 1992-03-27 Nok Corp Vessie pour accumulateur.
EP0482916A1 (de) * 1990-10-23 1992-04-29 Honda Giken Kogyo Kabushiki Kaisha Speicher
FR2669081A1 (fr) * 1990-11-10 1992-05-15 Bosch Gmbh Robert Accumulateur hydropneumatique a vessie.
DE4231927A1 (de) * 1992-09-24 1994-03-31 Hydac Technology Gmbh Kunststoffmembran, Verfahren zu ihrer Herstellung sowie ihre Verwendung
FR2700375A1 (fr) * 1993-01-13 1994-07-13 Peugeot Membrane élastique imperméable.
EP0859156A1 (de) * 1997-02-17 1998-08-19 Automobiles Peugeot Elastische, gasundurchlässige Membran und damit ausgestattete hydropneumatische Akkumulatoren
EP0858883A1 (de) * 1997-02-17 1998-08-19 Elf Atochem S.A. Elastische, gasundurchlässige Membran und damit ausgestattete hydropneumatische Akkumulatoren
WO2003085270A2 (de) * 2002-04-10 2003-10-16 Hydac Technology Gmbh Hydrospeicher, vorzugsweise membranspeicher
EP2175205A1 (de) 2008-10-09 2010-04-14 Winkelmann Sp. z o.o. Membrandruckausdehnungsgefäss

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DE4243652C2 (de) * 1991-12-27 1999-04-01 Tokai Rubber Ind Ltd Flexibles Trennwandelement für einen Flüssigkeitsspeicher
US5618629A (en) * 1991-12-27 1997-04-08 Tokai Rubber Industries, Inc. Flexible partition member for hydraulic accumulator, including ethylene-vinyl alcohol copolymer gas-barrier layer and polyamide resin elastic layer
US5456787A (en) * 1993-12-01 1995-10-10 J. E. Miles, Inc. Method for making a hydropneumatic accumulator
US5952065A (en) * 1994-08-31 1999-09-14 Nike, Inc. Cushioning device with improved flexible barrier membrane
DE69529255T2 (de) * 1994-08-31 2009-09-17 Nike International Ltd., Beaverton Gas-aufgeblasene Blase zum Polstern
TW399014B (en) 1994-08-31 2000-07-21 Nike Inc Laminated resilient flexible barrier membranes
CA2614605C (en) * 1995-06-07 2011-04-19 Nike International Ltd. Membranes of polyurethane based materials including polyester polyols
US6599597B1 (en) 1995-06-07 2003-07-29 Nike, Inc. Barrier membranes including a barrier layer employing aliphatic thermoplastic urethanes
US6013340A (en) 1995-06-07 2000-01-11 Nike, Inc. Membranes of polyurethane based materials including polyester polyols
US6116585A (en) * 1997-08-11 2000-09-12 Mannesmann Sachs Ag Pressure holder with an enclosed gas mass
AU752631B2 (en) 1998-09-11 2002-09-26 Nike Innovate C.V. Flexible membranes
US6082025A (en) * 1998-09-11 2000-07-04 Nike, Inc. Flexible membranes
US6127026A (en) * 1998-09-11 2000-10-03 Nike, Inc. Flexible membranes
US7229518B1 (en) * 2000-11-02 2007-06-12 Nike, Inc. Process for improving interfacial adhesion in a laminate
DE10112976A1 (de) * 2001-03-17 2002-10-02 Hydac Technology Gmbh Hydropneumatischer Druckspeicher
GB0126361D0 (en) * 2001-11-02 2002-01-02 Secr Defence Protective apparel
US20060096990A1 (en) * 2004-11-11 2006-05-11 Reed Richard J Multi compartment collapsible tank
JP2006322738A (ja) * 2005-05-17 2006-11-30 Surpass Kogyo Kk ダンパ
FR2903064B1 (fr) * 2006-06-30 2009-05-01 Bosch Gmbh Robert Circuit hydraulique de freinage
US20100000920A1 (en) * 2008-07-07 2010-01-07 Ermanno Martinello Membrane coating for a water pressurization Bladder
PT2233844E (pt) 2009-03-14 2014-11-03 Winkelmann Sp Z O O Vaso de expansão por pressão de membrana
DE102014000358A1 (de) * 2014-01-09 2015-07-09 Hydac Technology Gmbh Druckspeicher
US9670979B1 (en) 2016-05-13 2017-06-06 Liquidspring Technologies, Inc. Resilient expandable pressure vessel

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FR1479485A (fr) * 1966-03-14 1967-05-05 Genoud & Cie Ets Procédé de fabrication de membrane de séparation pour distributeur de produits sous pression
FR1494473A (fr) * 1966-09-23 1967-09-08 Daimler Benz Ag Accumulateur de pression de préférence pour une suspension oléo-pneumatique de véhicules, en particulier de voitures automobiles
FR2151371A5 (de) * 1971-08-24 1973-04-13 Feldmuehle Anlagen Prod
FR2443622A1 (fr) * 1978-12-07 1980-07-04 Bosch Gmbh Robert Membrane de separation elastique pour reservoir sous pression
DE3219530A1 (de) * 1982-05-25 1983-12-01 Alfred Teves Gmbh, 6000 Frankfurt Membran fuer druckspeicher

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JPS62137470A (ja) * 1985-12-12 1987-06-20 Mitsubishi Heavy Ind Ltd ピストン
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Publication number Priority date Publication date Assignee Title
FR1479485A (fr) * 1966-03-14 1967-05-05 Genoud & Cie Ets Procédé de fabrication de membrane de séparation pour distributeur de produits sous pression
FR1494473A (fr) * 1966-09-23 1967-09-08 Daimler Benz Ag Accumulateur de pression de préférence pour une suspension oléo-pneumatique de véhicules, en particulier de voitures automobiles
FR2151371A5 (de) * 1971-08-24 1973-04-13 Feldmuehle Anlagen Prod
FR2443622A1 (fr) * 1978-12-07 1980-07-04 Bosch Gmbh Robert Membrane de separation elastique pour reservoir sous pression
DE3219530A1 (de) * 1982-05-25 1983-12-01 Alfred Teves Gmbh, 6000 Frankfurt Membran fuer druckspeicher

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9004560U1 (de) * 1990-04-23 1991-08-22 Bran + Luebbe GmbH, 2000 Norderstedt Verbundmembran
US5409041A (en) * 1990-05-31 1995-04-25 Nok Corporation Laminated sheet
DE4117411A1 (de) * 1990-05-31 1991-12-05 Nok Corp Laminierter flaechenhafter koerper
DE4117411C2 (de) * 1990-05-31 1998-08-06 Nok Corp Membranelement und Speicherelement mit einem solchen Membranelement
US5524671A (en) * 1990-05-31 1996-06-11 Nok Corporation Laminated sheet
FR2667118A1 (fr) * 1990-09-26 1992-03-27 Nok Corp Vessie pour accumulateur.
EP0482916A1 (de) * 1990-10-23 1992-04-29 Honda Giken Kogyo Kabushiki Kaisha Speicher
US5215124A (en) * 1990-10-23 1993-06-01 Honda Giken Kogyo Kabushiki Kaisha Accumulator
FR2669081A1 (fr) * 1990-11-10 1992-05-15 Bosch Gmbh Robert Accumulateur hydropneumatique a vessie.
DE4231927C2 (de) * 1992-09-24 1998-07-02 Hydac Technology Gmbh Kunststoffmembran für Druckspeicher
DE4231927A1 (de) * 1992-09-24 1994-03-31 Hydac Technology Gmbh Kunststoffmembran, Verfahren zu ihrer Herstellung sowie ihre Verwendung
EP0610637A1 (de) * 1993-01-13 1994-08-17 Automobiles Peugeot Elastische, undurchlässige Membran
US5645922A (en) * 1993-01-13 1997-07-08 Automobiles Peugeot Impermeable elastic membrane
FR2700375A1 (fr) * 1993-01-13 1994-07-13 Peugeot Membrane élastique imperméable.
FR2759755A1 (fr) * 1997-02-17 1998-08-21 Atochem Elf Sa Membrane elastique impermeable aux gaz et accumulateur hydropneumatique equipe de cette membrane
EP0858883A1 (de) * 1997-02-17 1998-08-19 Elf Atochem S.A. Elastische, gasundurchlässige Membran und damit ausgestattete hydropneumatische Akkumulatoren
EP0859156A1 (de) * 1997-02-17 1998-08-19 Automobiles Peugeot Elastische, gasundurchlässige Membran und damit ausgestattete hydropneumatische Akkumulatoren
FR2759743A1 (fr) * 1997-02-17 1998-08-21 Peugeot Membrane elastique impermeable aux gaz et accumulateur hydropneumatique equipe de cette membrane
US6058976A (en) * 1997-02-17 2000-05-09 Automobiles Peugeot Gas-impermeable elastic membrane and hydropneumatic accumulator equipped with this membrane
US6350529B1 (en) 1997-02-17 2002-02-26 Elf Atochem S.A. Gas-impermeable elastic membrane and hydropnematic accumulator equipped with this measure
WO2003085270A2 (de) * 2002-04-10 2003-10-16 Hydac Technology Gmbh Hydrospeicher, vorzugsweise membranspeicher
WO2003085270A3 (de) * 2002-04-10 2005-05-12 Hydac Technology Gmbh Hydrospeicher, vorzugsweise membranspeicher
US8539984B2 (en) 2002-04-10 2013-09-24 Hydac Technology Gmbh Hydraulic accumulator, in particular a membrane accumulator
EP2175205A1 (de) 2008-10-09 2010-04-14 Winkelmann Sp. z o.o. Membrandruckausdehnungsgefäss

Also Published As

Publication number Publication date
FR2636638A1 (fr) 1990-03-23
US5036110A (en) 1991-07-30
FR2636638B1 (fr) 1990-12-21
DE68900297D1 (de) 1991-11-07
EP0360648B1 (de) 1991-10-02
ES2027067T3 (es) 1992-05-16
JP2744817B2 (ja) 1998-04-28
JPH02127436A (ja) 1990-05-16

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