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EP0376058A1 - Energy accumulator - Google Patents

Energy accumulator Download PDF

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Publication number
EP0376058A1
EP0376058A1 EP89123000A EP89123000A EP0376058A1 EP 0376058 A1 EP0376058 A1 EP 0376058A1 EP 89123000 A EP89123000 A EP 89123000A EP 89123000 A EP89123000 A EP 89123000A EP 0376058 A1 EP0376058 A1 EP 0376058A1
Authority
EP
European Patent Office
Prior art keywords
layer
energy store
store according
membrane
fibers
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.)
Withdrawn
Application number
EP89123000A
Other languages
German (de)
French (fr)
Inventor
Volker Dr. Rees
Ferdinand Dr. Lutz
Bernhard Dr. Thies
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.)
ABB AG Germany
ABB AB
Original Assignee
Asea Brown Boveri AG Germany
Asea Brown Boveri AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asea Brown Boveri AG Germany, Asea Brown Boveri AB filed Critical Asea Brown Boveri AG Germany
Publication of EP0376058A1 publication Critical patent/EP0376058A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/21—Accumulator cushioning means using springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes

Definitions

  • the invention relates to an energy store with a pressure vessel, which is separated from a flexible membrane into two subspaces, in particular a hydraulic accumulator, the first subspace of which contains a liquid, in particular oil, as working fluid and the second subspace of which houses at least one mechanical spring for energy storage.
  • the flexible membrane is exposed to large pressure differences and has a high mechanical strength. It must also be designed for a large number of movement games.
  • plastic membranes that are generally used have the disadvantage of not being absolutely tight under all circumstances.
  • a Mixing of the media to be separated occurs. This process is due in particular to diffusion processes.
  • the media exchange causes, among other things, that the stored energy decreases more and more.
  • the object of the invention is to make the membrane absolutely tight.
  • a multiple membrane in such a way that it is constructed from two layers, one of which is designed as a force-absorbing layer and the second as a sealing layer.
  • the sealing layer is expediently made of a metal, for example a metal foil or a thin metal plate. Stretch folds or waves are preferably stamped into it.
  • the layers of the membranes can be carried out separately from one another and simply lie on top of one another; but they can also be inseparably connected to one another in a so-called composite membrane.
  • the force-absorbing layer is preferably formed from an elastomer which contains fibers that absorb forces.
  • the fibers in particular glass fibers, are guided around tie rods that are firmly fixed in the layer.
  • the latter can e.g. be mechanically firmly anchored at the clamping point (flange point).
  • the fibers can be guided around metal plates embedded in the layer (supporting elements for the mechanical springs).
  • An additional spring containing a compressible fluid for example gas, can optionally be connected in parallel or in series to the mechanical spring used for energy storage.
  • a dense metal membrane layer 2 is assigned to the relatively flat, flexible and force-absorbing membrane layer 1, usually an elastomer.
  • the latter for example an aluminum or stainless steel foil, has concentrically applied expansion folds in the form of wave crests 3 and wave troughs 4 protruding from the foil plane.
  • the glass fibers 5 embedded for stability can be seen in the membrane layer 1, which in rosette form are evenly circular in shape Membrane layer 1 are arranged distributed.
  • tie rods 1 a are uniformly used, around which the glass fibers 5 are looped.
  • the tie rods can be fixed in the flange 10, 11.
  • FIG. 4 shows a pressure vessel 6 which is divided into two spaces 7 and 8 by the multiple membrane, namely the membrane layer 1 and the metal membrane layer 2.
  • the closed space 7 there is at least one storage element, in the form of a mechanical compression spring 9.
  • a working medium is filled into the space 8 under pressure, the multiple membrane deviating towards the space 7 in the direction of the arrow (FIG. 4) and the storage element there - here the spring 9 - pressurizes.
  • the working medium e.g. Oil is displaced in the room 8 by relaxing the spring 9.
  • the spring 9 can also be assigned a gas spring in parallel or series connection.
  • Figure 5 shows the pressure vessel with an almost relaxed pressure accumulator.
  • the membrane layers 1, 2 dividing the spaces lie one on top of the other, the metal membrane layer 2 facing the working space 8 filled with oil.
  • the membrane layers can be tightly welded to one another at the circumferential mounting point and they are pressed tightly between the flanges 10, 11 of the pressure vessel.
  • the metal plate 1b which serves as a support element and is worked into the center of the pressure-absorbing membrane layer 1, can likewise serve the glass fibers 5 as tie rods which are guided around the metal plate.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Diaphragms And Bellows (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

The invention relates to an energy accumulator with a pressure vessel (6) which is divided by a diaphragm into two part-spaces, in particular a closed gas space (7) accommodating an accumulator, and a space (8) filled with working medium. In order to prevent diffusion processes across the diaphragm, the said diaphragm is constructed from two layers (1, 2), namely a layer (1) of high mechanical strength and a further layer (2) resistant to diffusion. <IMAGE>

Description

Die Erfindung betrifft einen Energiespeicher mit einem Druckgefäß, das von einer flexiblen Membran in zwei Teilräume abgetrennt ist, insbesondere Hydrospeicher, dessen erster Teilraum eine Flüssigkeit, insbesondere Öl, als Arbeitsfluid enthält und dessen zweiter Teilraum mindestens eine mechanische Feder zur Energiespeicherung beherbergt.The invention relates to an energy store with a pressure vessel, which is separated from a flexible membrane into two subspaces, in particular a hydraulic accumulator, the first subspace of which contains a liquid, in particular oil, as working fluid and the second subspace of which houses at least one mechanical spring for energy storage.

Die flexible Membran ist großen Druckunterschieden aus­gesetzt und mechanisch hochfest ausgebildet, zudem muß sie für eine hohe Anzahl Bewegungsspielen ausgelegt sein.The flexible membrane is exposed to large pressure differences and has a high mechanical strength. It must also be designed for a large number of movement games.

Die in der Regel eingesetzen Kunststoffmembranen haben jedoch den Nachteil, nicht unter allen Umständen absolut dicht zu sein. Beim Betreiben des Speichers über eine längere Zeit stellt sich nämlich heraus, daß eine Vermischung der zu trennenden Medien eintritt. Dieser Prozeß ist insbesondere auf Diffusionsvorgänge zurückzu­führen. Der Medienaustausch bewirkt u.a., daß die ge­speicherte Energie mehr und mehr abnimmt.However, the plastic membranes that are generally used have the disadvantage of not being absolutely tight under all circumstances. When operating the memory for a long time, it turns out that a Mixing of the media to be separated occurs. This process is due in particular to diffusion processes. The media exchange causes, among other things, that the stored energy decreases more and more.

Die Aufgabe der Erfindung besteht darin, die Membran absolut dicht auszuführen.The object of the invention is to make the membrane absolutely tight.

Erreicht wird dies erfindungsgemäß durch eine Mehrfach­membran, dergestalt, daß sie aus zwei Schichten aufge­baut ist, deren eine Schicht als Kraftaufnahmeschicht und deren zweite als Dichtungsschicht gestaltet ist.This is achieved according to the invention by means of a multiple membrane, in such a way that it is constructed from two layers, one of which is designed as a force-absorbing layer and the second as a sealing layer.

Die Dichtungsschicht wird zweckmäßigerweise von einem Metall, etwa einer Metallfolie oder einer dünnen Metall­platte, realisiert. Ihr sind bevorzugt Dehnungsfalten bzw. -Wellen eingeprägt. Die Schichten der Membranen können getrennt voneinander ausgeführt werden und ein­fach aufeinander liegen; sie können aber auch in einer einzigen, sog. Verbundmembran, untrennbar miteinander verbunden sein.The sealing layer is expediently made of a metal, for example a metal foil or a thin metal plate. Stretch folds or waves are preferably stamped into it. The layers of the membranes can be carried out separately from one another and simply lie on top of one another; but they can also be inseparably connected to one another in a so-called composite membrane.

Die Kraftaufnahmeschicht wird vorzugsweise aus einem Elastomer gebildet, dem Kräfte aufnehmende Fasern einge­lagert sind. Die Fasern, insbesondere Glasfasern, werden dabei um fest in die Schicht fixierte Zuganker herumge­führt. Letztere können z.B. an der Einspannstelle (Flanschstelle) mechanisch fest verankert werden. An­dererseits können die Fasern um in die Schicht eingelas­senen Metallplatten (Abstützelemente für die mechani­schen Federn) herumgeführt sein.The force-absorbing layer is preferably formed from an elastomer which contains fibers that absorb forces. The fibers, in particular glass fibers, are guided around tie rods that are firmly fixed in the layer. The latter can e.g. be mechanically firmly anchored at the clamping point (flange point). On the other hand, the fibers can be guided around metal plates embedded in the layer (supporting elements for the mechanical springs).

Der der Energiespeicherung dienenden mechanischen Feder kann ggf. noch eine zusätzliche, ein kompressibles Fluid, z.B. Gas, enthaltene Feder parallel oder in Reihe geschaltet werden.An additional spring containing a compressible fluid, for example gas, can optionally be connected in parallel or in series to the mechanical spring used for energy storage.

Es ist vorteilhaft, die diffusionsfeste und ohne weite­res auch flüssigkeitsdichte metallische Dichtungsschicht der Flüssigkeitsseite im Energiespeicher zugewandt ein­zusetzen. Dadurch können an die, der Gasseite zugewand­ten Kraftaufnahmeschicht geringere Anforderungen ge­stellt werden; so braucht diese dann nicht mehr beson­ders flüssigkeitsdicht sowie -beständig ausgebildet sein.It is advantageous to use the diffusion-resistant and also liquid-tight metallic sealing layer facing the liquid side in the energy store. As a result, lower demands can be placed on the force absorption layer facing the gas side; it then no longer needs to be particularly liquid-tight and resistant.

Die Erfindung soll nachfolgend anhand eines Ausführungs­beispieles näher erläutert werden.The invention will be explained in more detail below using an exemplary embodiment.

Es zeigen:

  • Figur 1 die einzelnen Schichten der Membran in Seitenansicht,
  • Figur 2, 3 die jeweiligen Schichten nach Figur 1 in Draufsicht,
  • Figur 4, 5 ein Druckgefäß im Schnitt mit gespanntem sowie entspanntem Energiespeicher.
Show it:
  • FIG. 1 shows the individual layers of the membrane in a side view,
  • 2, 3 the respective layers according to FIG. 1 in plan view,
  • 4, 5 a pressure vessel in section with a tensioned and relaxed energy store.

Der relativ ebenen, flexiblen und kraftaufnehmenden Mem­branschicht 1, in der Regel ein Elastomer, wird eine dichte Metallmembranschicht 2 zugeordnet. Letztere, z.B. eine Aluminium- bzw. Edelstahlfolie, besitzt konzen­trisch angelegte Dehnungsfalten in Form von aus der Fo­lienebene herausragenden Wellenkuppen 3 sowie Wellentä­lern 4. In der Draufsicht erkennt man bei der Membran­schicht 1 die zur Stabilität eingelagerten Glasfasern 5, welche in Rosettenform gleichmäßig in der kreisrunden Membranschicht 1 verteilt angeordnet sind. An der Peri­pherie der Membranschicht 1 sind gleichmäßig Zuganker 1a eingesetzt, um die die Glasfasern 5 geschlungen sind. Die Zuganker sind im Flansch 10, 11 festsetzbar.A dense metal membrane layer 2 is assigned to the relatively flat, flexible and force-absorbing membrane layer 1, usually an elastomer. The latter, for example an aluminum or stainless steel foil, has concentrically applied expansion folds in the form of wave crests 3 and wave troughs 4 protruding from the foil plane. In the plan view, the glass fibers 5 embedded for stability can be seen in the membrane layer 1, which in rosette form are evenly circular in shape Membrane layer 1 are arranged distributed. At the periphery of the membrane layer 1 tie rods 1 a are uniformly used, around which the glass fibers 5 are looped. The tie rods can be fixed in the flange 10, 11.

In Figur 4 ist ein Druckgefäß 6 gezeigt, das von der Mehrfachmembran, nämlich der Membranschicht 1 sowie der Metallmembranschicht 2 in zwei Räume 7 und 8 unterteilt ist. Im geschlossenen Raum 7 befindet sich mindestens ein Speicherelement, in Form einer mechanischen Druckfe­der 9. In den Raum 8 wird ein Arbeitsmedium unter Druck eingefüllt, wobei die Mehrfachmembran in Pfeilrichtung zum Raum 7 hin ausweicht (Figur 4) und das dortige Spei­cherelement - hier die Feder 9 - unter Druck setzt. Bei Bedarf wird umgekehrt dadurch Arbeit geleistet, daß das Arbeitsmedium, z.B. Öl, im Raum 8 durch das Entspannen der Feder 9 verdrängt wird. Der Feder 9 kann zusätzlich noch eine Gasfeder in Parallel- oder Reihenschaltung zugeordnet werden.FIG. 4 shows a pressure vessel 6 which is divided into two spaces 7 and 8 by the multiple membrane, namely the membrane layer 1 and the metal membrane layer 2. In the closed space 7 there is at least one storage element, in the form of a mechanical compression spring 9. A working medium is filled into the space 8 under pressure, the multiple membrane deviating towards the space 7 in the direction of the arrow (FIG. 4) and the storage element there - here the spring 9 - pressurizes. Conversely, if necessary, work is performed by the working medium, e.g. Oil is displaced in the room 8 by relaxing the spring 9. The spring 9 can also be assigned a gas spring in parallel or series connection.

Figur 5 zeigt das Druckgefäß mit nahezu entspanntem Druckspeicher.Figure 5 shows the pressure vessel with an almost relaxed pressure accumulator.

Die die Räume unterteilenden Membranschichten 1, 2 lie­gen aufeinander, wobei die Metallmembranschicht 2 dem mit Öl aufgefüllten Arbeitsraum 8 zugewandt ist. Die Membranschichten können an der umlaufenden Fassungsstel­le miteinander dicht verschweißt sein und sie werden dort zwischen den Flanschen 10, 11 des Druckgefäßes dicht verpresst. Die als Abstützelement dienende und mittig in die druckaufnehmende Membranschicht 1 eingear­beitete Metallplatte 1b kann den Glasfasern 5 ebenfalls als Zuganker dienen, die um die Metallplatte herumge­führt werden.The membrane layers 1, 2 dividing the spaces lie one on top of the other, the metal membrane layer 2 facing the working space 8 filled with oil. The membrane layers can be tightly welded to one another at the circumferential mounting point and they are pressed tightly between the flanges 10, 11 of the pressure vessel. The metal plate 1b, which serves as a support element and is worked into the center of the pressure-absorbing membrane layer 1, can likewise serve the glass fibers 5 as tie rods which are guided around the metal plate.

Im Raum 7 befindet sich in der Regel ein Gas unter Atmo­sphärendruck.In room 7 there is usually a gas under atmospheric pressure.

Claims (8)

1. Energiespeicher mit einem Druckgefäß, das von einer flexiblen Membran in zwei Teilräume abgetrennt ist, insbesondere Hydrospeicher, dessen erster Teilraum eine Flüssigkeit, insbesondere Öl, als Arbeitsfluid ent­hält, und dessen zweiter Teilraum mindestens eine mecha­nische Feder zur Energiespeicherung aufweist, dadurch gekennzeichnet, daß die flexible Membran aus zwei Schichten aufgebaut ist, deren eine Schicht als Kraft­aufnahmeschicht (1) die infolge hoher Druckunterschiede in den beiden Teilräumen (7, 8) entstehende Kräft auf­nimmt, und deren zweite Schicht als Dichtungsschicht (2) einen Austausch der unterschiedlichen Medien der beiden Teilräume verhindert.1. Energy storage device with a pressure vessel, which is separated from a flexible membrane in two subspaces, in particular hydraulic accumulator, the first subspace of which contains a liquid, in particular oil, as working fluid, and the second subspace of which has at least one mechanical spring for energy storage, characterized in that the flexible membrane is made up of two layers, one layer of which acts as a force-absorbing layer (1) and absorbs the forces arising as a result of high pressure differences in the two subspaces (7, 8), and the second layer of which acts as a sealing layer (2) to exchange the different media of the two Partial rooms prevented. 2. Energiespeicher nach Anspruch 1, dadurch gekenn­zeichnet, daß die Dichtungsschicht (2) aus Metall be­steht.2. Energy store according to claim 1, characterized in that the sealing layer (2) consists of metal. 3. Energiespeicher nach eindem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Kraftaufnahmeschicht (1) aus einem Elastomer mit eingelagerten Fasern zur Kraftaufnahme besteht.3. Energy store according to one of claims 1 or 2, characterized in that the force absorption layer (1) consists of an elastomer with embedded fibers for force absorption. 4. Energiespeicher nach Ansprch 3, dadurch gekenn­zeichnet, daß die in den Elastomer der Kraftaufnahme­schicht (1) eingelagerten Fasern um feststehende, in die Membran eingearbeitete Zuganker (1a) herumgeführt sind.4. Energy store according to claim 3, characterized in that the fibers embedded in the elastomer of the force-absorbing layer (1) are guided around fixed tie rods (1a) incorporated into the membrane. 5. Energiespeicher nach Anspruch 4, dadurch gekenn­zeichnet, daß die Zuganker (1a) an der Einspannstelle (Flansch) der Membran fixiert sind.5. Energy store according to claim 4, characterized in that the tie rods (1a) are fixed to the clamping point (flange) of the membrane. 6. Energiespeicher nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß Fasern (5) , insbesondere Glasfa­sern, rosettenartig eingelagert sind.6. Energy store according to claim 4 or 5, characterized in that fibers (5), in particular glass fibers, are embedded like a rosette. 7. Energiespeicher nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die, insbesondere von einer Metallfolie dargestellte Dichtungsschicht (2) kon­zentrisch verlaufende Dehnungswellen (3, 4) aufweist.7. Energy store according to one of claims 1 to 6, characterized in that the sealing layer (2), in particular represented by a metal foil, has concentrically extending expansion waves (3, 4). 8. Energiespeicher nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Dichtungsschicht (2) dem Flüssigkeitsraum (8) zugewandt ist.8. Energy store according to one of claims 1 to 7, characterized in that the sealing layer (2) faces the liquid space (8).
EP89123000A 1988-12-28 1989-12-13 Energy accumulator Withdrawn EP0376058A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883844054 DE3844054A1 (en) 1988-12-28 1988-12-28 ENERGY STORAGE
DE3844054 1988-12-28

Publications (1)

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EP0376058A1 true EP0376058A1 (en) 1990-07-04

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EP89123000A Withdrawn EP0376058A1 (en) 1988-12-28 1989-12-13 Energy accumulator

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DE (1) DE3844054A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0482916A1 (en) * 1990-10-23 1992-04-29 Honda Giken Kogyo Kabushiki Kaisha Accumulator
FR2685740A1 (en) * 1991-12-27 1993-07-02 Tokai Rubber Ind Ltd FLEXIBLE SEPARATION ELEMENT FOR A HYDRAULIC ACCUMULATOR COMPRISING A VINYL ETHYLENE ALCOHOL COPOLYMER GAS CUTTING LAYER AND AN ELASTIC POLYAMIDE RESIN LAYER
WO2004013495A1 (en) * 2002-07-31 2004-02-12 Carl Freudenberg Kg Hydropneumatic pressure reservoir

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2226512B1 (en) 2009-03-03 2011-07-20 Carl Freudenberg KG Hydraulic accumulator with accumulator sub-chambers arrayed in a row

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1202889A (en) * 1957-03-02 1960-01-14 Dunlop Rubber Co Elastic diaphragm
GB829438A (en) * 1957-01-09 1960-03-02 Moulton Development Ltd Improvements in fluid pressure systems and apparatus
FR1317420A (en) * 1962-02-01 1963-02-08 Parkinson Cowan Appliances Ltd Improved diaphragm for fluid measuring and control device
DE1186285B (en) * 1959-12-09 1965-01-28 Olaer Patent Co Pressure medium tank with rigid housing and partition
DE1600632A1 (en) * 1967-05-09 1970-05-06 Teves Gmbh Alfred Storage to be used in connection with so-called fully hydraulic brake systems
DE2023637A1 (en) * 1970-05-14 1971-11-25 Swf Pressure accumulator for a heating oil supply system
DE3012079A1 (en) * 1980-03-28 1981-10-08 Wabco Fahrzeugbremsen Gmbh, 3000 Hannover Hydraulic pressure accumulator with rigid housing - has gas-tight metal diaphragm with concentric corrugations as housing partition
DE3219530A1 (en) * 1982-05-25 1983-12-01 Alfred Teves Gmbh, 6000 Frankfurt Membrane for accumulators
EP0100221A2 (en) * 1982-07-26 1984-02-08 Robertshaw Controls Company Fluid pressure sensitive construction and method of making the same

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB829438A (en) * 1957-01-09 1960-03-02 Moulton Development Ltd Improvements in fluid pressure systems and apparatus
FR1202889A (en) * 1957-03-02 1960-01-14 Dunlop Rubber Co Elastic diaphragm
DE1186285B (en) * 1959-12-09 1965-01-28 Olaer Patent Co Pressure medium tank with rigid housing and partition
FR1317420A (en) * 1962-02-01 1963-02-08 Parkinson Cowan Appliances Ltd Improved diaphragm for fluid measuring and control device
DE1600632A1 (en) * 1967-05-09 1970-05-06 Teves Gmbh Alfred Storage to be used in connection with so-called fully hydraulic brake systems
DE2023637A1 (en) * 1970-05-14 1971-11-25 Swf Pressure accumulator for a heating oil supply system
DE3012079A1 (en) * 1980-03-28 1981-10-08 Wabco Fahrzeugbremsen Gmbh, 3000 Hannover Hydraulic pressure accumulator with rigid housing - has gas-tight metal diaphragm with concentric corrugations as housing partition
DE3219530A1 (en) * 1982-05-25 1983-12-01 Alfred Teves Gmbh, 6000 Frankfurt Membrane for accumulators
EP0100221A2 (en) * 1982-07-26 1984-02-08 Robertshaw Controls Company Fluid pressure sensitive construction and method of making the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0482916A1 (en) * 1990-10-23 1992-04-29 Honda Giken Kogyo Kabushiki Kaisha Accumulator
US5215124A (en) * 1990-10-23 1993-06-01 Honda Giken Kogyo Kabushiki Kaisha Accumulator
FR2685740A1 (en) * 1991-12-27 1993-07-02 Tokai Rubber Ind Ltd FLEXIBLE SEPARATION ELEMENT FOR A HYDRAULIC ACCUMULATOR COMPRISING A VINYL ETHYLENE ALCOHOL COPOLYMER GAS CUTTING LAYER AND AN ELASTIC POLYAMIDE RESIN LAYER
WO2004013495A1 (en) * 2002-07-31 2004-02-12 Carl Freudenberg Kg Hydropneumatic pressure reservoir

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