EP1239196A2 - Piston accumulator - Google Patents

Piston accumulator Download PDF

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Publication number
EP1239196A2
EP1239196A2 EP02000825A EP02000825A EP1239196A2 EP 1239196 A2 EP1239196 A2 EP 1239196A2 EP 02000825 A EP02000825 A EP 02000825A EP 02000825 A EP02000825 A EP 02000825A EP 1239196 A2 EP1239196 A2 EP 1239196A2
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EP
European Patent Office
Prior art keywords
ring
piston
sealing
piston accumulator
space
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Withdrawn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
EP02000825A
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German (de)
French (fr)
Other versions
EP1239196A3 (en
Inventor
Hans-Peter Altmann
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
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 Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP1239196A2 publication Critical patent/EP1239196A2/en
Publication of EP1239196A3 publication Critical patent/EP1239196A3/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Withdrawn legal-status Critical Current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
    • F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
    • 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
    • F15B2201/205—Accumulator cushioning means using gas
    • 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
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
    • F15B2201/312—Sealings therefor, e.g. piston rings

Definitions

  • the invention relates to a piston accumulator, comprising at least one Separating piston which is axially reciprocable in a cylinder and for Sealing a space filled with a gaseous medium against one at least on the outside circumference with a space filled with a liquid medium two sealing rings arranged adjacent to one another with axial spacing has, wherein one of the sealing rings is designed as an O-ring.
  • Such a piston accumulator is known from DE 36 19 457 A1.
  • the Piston accumulators are used in hydraulic systems, whereby the Separating piston to seal it against the inner wall of the cylinder on the two each end of its outer circumference a groove-shaped recess has, in each of which a ring seal made of elastomeric material is arranged that its annular groove is directed to the relevant piston face is.
  • the invention has for its object a piston accumulator at the beginning continue to develop in such a way that it is good Features of use for a long period of use in a very has a wide temperature range and is therefore used in motor vehicles Application can come.
  • the O-ring on the Room with liquid medium facing side is arranged and from a Low-temperature elastomer and that the second sealing ring on the Room with gaseous medium facing side as a lip seal is formed, the sealing lips by a metallic tension spring to the sealing surfaces of separating pistons and / or cylinders can be created.
  • the piston accumulator can also be used in automobiles because it is good Features of use over a long period of use in one Has temperature range, which is at least from - 40 ° C to + 150 ° C. extends.
  • the service life in this temperature range is at least 10 years and the total number of cycles more than 1 million Load changes.
  • the piston accumulator Due to the good usage properties of the piston accumulator is the leakage from the pressurized rooms, one of which with a liquid, the other with a gas, e.g. nitrogen, is filled, negligibly small, so that the overall system of which the piston accumulator forms part, works very reliably.
  • a gas e.g. nitrogen
  • a key advantage is the metal tension spring of the lip seal to see. Especially when used in temperature ranges below - 30 ° C pure elastomer seals no longer have sufficient elasticity, so that reliable sealing is no longer guaranteed.
  • the piston accumulator according to the invention are too economically justifiable Excellent costs even under extreme operating conditions Usage properties ensured, even at temperatures of less than - 30 ° C, gas can escape to the liquid side is excluded.
  • the low-temperature elastomer that makes up the O-ring can For example, preferably formed by a fluorocarbon rubber (FPM) his.
  • FPM fluorocarbon rubber
  • the advantage of this material is that it is low Compression set after a long high temperature phase, one low permeation after a long storage period and low wear with more than 1 million load changes. A good seal of the O-ring at Temperatures from - 30 ° C to 200 ° C are possible without any problems.
  • the U-ring seal can be essentially C-shaped, open axially towards the room with gaseous medium be trained.
  • a seal that is used, for example can be formed by the applicant's piston seal PFTE-Forseal his.
  • the U-ring seal acts against the gas pressure on one side, whereby the metallic tension spring even at temperatures below - 30 ° C sufficiently large elastic pressure of the sealing lips on the surfaces to be sealed.
  • Fig. 1 an embodiment of a piston accumulator is shown, the two Rooms 3, 4 seals against each other.
  • Room 3 is with a gaseous Medium, for example filled with nitrogen.
  • Room 4 is, for example, with oil filled.
  • the separating piston 1 is a function of the one lying against it Pressure difference between the rooms 3, 4 in the axial direction within the Cylinder 2 reciprocated.
  • the outer side of the separating piston 1 is from two sealing rings 5, 6 adjacent to one another with an axial spacing enclosed, wherein the first sealing ring 5 is formed as an O-ring 7 and out a fluorocarbon rubber (FPM), a low-temperature elastomer, consists.
  • FPM fluorocarbon rubber
  • Such elastomers retain their good performance properties a temperature range from - 30 ° C to 200 ° C.
  • the second sealing ring on the room 3 with gaseous medium facing side of the separating piston 1 is as a lip seal 8 formed, the sealing lips 9, 10 by the metallic tension spring 11 to the surfaces 12, 13 of the separating piston 1 and cylinder 2 to be sealed are pressed.
  • a guide belt 14 in this exemplary embodiment arranged, which consists of PTFE.
  • the U-ring seal from Fig. 1 is shown as a single part.
  • the groove ring seal 8 viewed in longitudinal section, is substantially C-shaped, axially in Direction of the room 3 with gaseous medium open, the metallic Tension spring 11 limits the C-shaped recess on the outer peripheral side.
  • the Tension spring 11 is preferably made of a stainless spring steel, so that consistently good usage properties under all operating conditions during a long period of use. A reliable sealing takes place even at temperatures below -30 ° C.

Abstract

A piston storage unit, comprises a separation piston which can move to and fro in a cylinder, and has at least two O-rings which are spaced apart axially. One O-ring is located against an area containing a liquid medium and consists of a low temperature elastomer. The second ring is located against an area containing gas and is located in a groove. <??>A piston storage unit, comprises a separation piston which can move to and fro in a cylinder, and has at least two O-rings which are spaced apart axially. One O-ring is located against an area containing a liquid medium and consists of a low temperature elastomer. The second ring is located against an area containing gas and is located in a groove. The sealing lips (9,10) of the second ring are pressed against the sealing surfaces using a metallic tensioning spring (11).

Description

Die Erfindung betrifft einen Kolbenspeicher, umfassend zumindest einen Trennkolben, der in einem Zylinder axial hin- und herbewegbar ist und zur Abdichtung eines mit einem gasförmigen Medium gefüllten Raums gegen einen mit einem flüssigen Medium gefüllten Raum außenumfangsseitig zumindest zwei mit axialem Abstand zueinander benachbart angeordnete Dichtringe aufweist, wobei einer der Dichtringe als O-Ring ausgebildet ist.The invention relates to a piston accumulator, comprising at least one Separating piston which is axially reciprocable in a cylinder and for Sealing a space filled with a gaseous medium against one at least on the outside circumference with a space filled with a liquid medium two sealing rings arranged adjacent to one another with axial spacing has, wherein one of the sealing rings is designed as an O-ring.

Stand der TechnikState of the art

Ein solcher Kolbenspeicher ist aus der DE 36 19 457 A1 bekannt. Der Kolbenspeicher gelangt in Hydraulikanlagen zur Anwendung, wobei der Trennkolben zu seiner Abdichtung gegen die Zylinderinnenwand an den beiden stirnseitigen Enden seines Außenumfangs je eine nutförmige Ausnehmung aufweist, in der jeweils eine Nutring-Dichtung aus elastomerem Werkstoff so angeordnet ist, dass ihre Ringnut zur betreffenden Kolbenstirnseite gerichtet ist. Such a piston accumulator is known from DE 36 19 457 A1. The Piston accumulators are used in hydraulic systems, whereby the Separating piston to seal it against the inner wall of the cylinder on the two each end of its outer circumference a groove-shaped recess has, in each of which a ring seal made of elastomeric material is arranged that its annular groove is directed to the relevant piston face is.

Darstellung der ErfindungPresentation of the invention

Der Erfindung liegt die Aufgabe zugrunde, einen Kolbenspeicher der eingangs genannten Art derart weiterzuentwickeln, dass er gute Gebrauchseigenschaften während einer langen Gebrauchsdauer in einem sehr weiten Temperaturbereich aufweist und daher in Kraftfahrzeugen zur Anwendung gelangen kann.The invention has for its object a piston accumulator at the beginning continue to develop in such a way that it is good Features of use for a long period of use in a very has a wide temperature range and is therefore used in motor vehicles Application can come.

Zur Lösung dieser Aufgabe ist es vorgesehen, dass der O-Ring auf der dem Raum mit flüssigem Medium zugewandten Seite angeordnet ist und aus einem Tieftemperatur-Elastomer besteht und dass der zweite Dichtring auf der dem Raum mit gasförmigem Medium zugewandten Seite als Nutring-Dichtung ausgebildet ist, deren Dichtlippen durch eine metallische Spannfeder an die abzudichtenden Flächen von Trennkolben und / oder Zylinder anlegbar sind. Bei einer derartigen Ausgestaltung ist von Vorteil, dass der Kolbenspeicher auch in Automobilen zur Anwendung gelangen kann, da er gute Gebrauchseigenschaften während einer langen Gebrauchsdauer in einem Temperaturbereich aufweist, der sich wenigstens von ― 40°C bis + 150°C erstreckt. Die Gebrauchsdauer in diesem Temperaturbereich beträgt mindestens 10 Jahre und die Gesamtzyklenzahl mehr als 1 Millionen Lastwechsel. Durch die guten Gebrauchseigenschaften des Kolbenspeichers ist die Leckage aus den druckbeaufschlagbaren Räumen, von denen einer mit einer Flüssigkeit, der andere mit einem Gas, beispielsweise mit Stickstoff, gefüllt ist, vernachlässigbar gering, so dass auch das Gesamtsystem, von dem der Kolbenspeicher einen Teil bildet, sehr zuverlässig funktioniert.To solve this problem, it is provided that the O-ring on the Room with liquid medium facing side is arranged and from a Low-temperature elastomer and that the second sealing ring on the Room with gaseous medium facing side as a lip seal is formed, the sealing lips by a metallic tension spring to the sealing surfaces of separating pistons and / or cylinders can be created. With such a configuration, it is advantageous that the piston accumulator can also be used in automobiles because it is good Features of use over a long period of use in one Has temperature range, which is at least from - 40 ° C to + 150 ° C. extends. The service life in this temperature range is at least 10 years and the total number of cycles more than 1 million Load changes. Due to the good usage properties of the piston accumulator is the leakage from the pressurized rooms, one of which with a liquid, the other with a gas, e.g. nitrogen, is filled, negligibly small, so that the overall system of which the piston accumulator forms part, works very reliably.

Ein wesentlicher Vorteil ist in der metallischen Spannfeder der Nutring-Dichtung zu sehen. Vor allem bei Verwendung in Temperaturbereichen unter ― 30°C weisen reine Elastomerdichtungen keine ausreichende Elastizität mehr auf, so dass eine zuverlässige Abdichtung nicht mehr sicher gewährleistet ist. Durch den erfindungsgemäßen Kolbenspeicher sind zu wirtschaftlich vertretbaren Kosten auch unter extremen Einsatzbedingungen ausgezeichnete Gebrauchseigenschaften sichergestellt, wobei auch bei Temperaturen von weniger als ― 30°C ein Entweichen von Gas zur Flüssigkeitsseite hin sicher ausgeschlossen ist.A key advantage is the metal tension spring of the lip seal to see. Especially when used in temperature ranges below - 30 ° C pure elastomer seals no longer have sufficient elasticity, so that reliable sealing is no longer guaranteed. By the piston accumulator according to the invention are too economically justifiable Excellent costs even under extreme operating conditions Usage properties ensured, even at temperatures of less than - 30 ° C, gas can escape to the liquid side is excluded.

Das Tieftemperatur-Elastomer, aus dem der O-Ring besteht, kann beispielsweise bevorzugt durch einen Fluor-Karbonkautschuk (FPM) gebildet sein.The low-temperature elastomer that makes up the O-ring can For example, preferably formed by a fluorocarbon rubber (FPM) his.

Bei diesem Werkstoff ist von Vorteil, dass er einen niedrigen Druckverformungsrest nach längerer Hochtemperaturphase aufweist, eine niedrige Permeation nach längerer Lagerzeit und einen niedrigen Verschleiß bei mehr als 1 Million Lastwechsel. Eine gute Abdichtung des O-Rings bei Temperaturen von ― 30°C bis 200°C ist problemlos möglich.The advantage of this material is that it is low Compression set after a long high temperature phase, one low permeation after a long storage period and low wear with more than 1 million load changes. A good seal of the O-ring at Temperatures from - 30 ° C to 200 ° C are possible without any problems.

Die Nutring-Dichtung kann, im Längsschnitt betrachtet, im Wesentlichen C-förmig, axial in Richtung des Raums mit gasförmigem Medium offen ausgebildet sein. Eine Dichtung, die beispielsweise zur Anwendung gelangen kann, kann durch die Kolbendichtung PFTE-Forseal der Anmelderin gebildet sein. Die Nutring-Dichtung wirkt einseitig gegen den Gasdruck, wobei die metallische Spannfeder auch bei Temperaturen von weniger als ― 30°C eine ausreichend große elastische Anpressung der Dichtlippen an die abzudichtenden Flächen bewirkt.Viewed in longitudinal section, the U-ring seal can be essentially C-shaped, open axially towards the room with gaseous medium be trained. A seal that is used, for example can be formed by the applicant's piston seal PFTE-Forseal his. The U-ring seal acts against the gas pressure on one side, whereby the metallic tension spring even at temperatures below - 30 ° C sufficiently large elastic pressure of the sealing lips on the surfaces to be sealed.

Kurzbeschreibung der ZeichnungBrief description of the drawing

Ein Ausführungsbeispiel des erfindungsgemäßen Kolbenspeichers wird nachfolgend anhand der Fig. 1 und 2 näher erläutert. An embodiment of the piston accumulator according to the invention is 1 and 2 explained in more detail below.

Diese zeigen jeweils in schematischer Darstellung:

  • Fig. 1 einen Längsschnitt durch einen erfindungsgemäßen Kolbenspeicher;
  • Fig. 2 den zur Anwendung gelangenden zweiten Dichtring als Einzelteil.
    • These each show a schematic representation:
  • 1 shows a longitudinal section through a piston accumulator according to the invention.
  • Fig. 2 the second sealing ring used as an individual part.

    • Ausführung der ErfindungImplementation of the invention

    In Fig. 1 ist ein Ausführungsbeispiel eines Kolbenspeichers gezeigt, der zwei Räume 3, 4 gegeneinander abdichtet. Raum 3 ist mit einem gasförmigen Medium, beispielsweise mit Stickstoff gefüllt. Raum 4 ist beispielsweise mit Öl gefüllt.In Fig. 1, an embodiment of a piston accumulator is shown, the two Rooms 3, 4 seals against each other. Room 3 is with a gaseous Medium, for example filled with nitrogen. Room 4 is, for example, with oil filled.

    Der Trennkolben 1 wird in Abhängigkeit von der an ihm anliegenden Druckdifferenz zwischen den Räumen 3, 4 in axialer Richtung innerhalb des Zylinders 2 hin- und herbewegt. Außenumfangsseitig ist der Trennkolben 1 von zwei mit axialem Abstand zueinander benachbarten Dichtringen 5, 6 umschlossen, wobei der erste Dichtring 5 als O-Ring 7 ausgebildet ist und aus einem Fluor-Karbonkautschuk (FPM), einem Tieftemperatur-Elastomer, besteht. Solche Elastomere behalten ihre guten Gebrauchseigenschaften in einem Temperaturbereich von ― 30°C bis 200°C.The separating piston 1 is a function of the one lying against it Pressure difference between the rooms 3, 4 in the axial direction within the Cylinder 2 reciprocated. The outer side of the separating piston 1 is from two sealing rings 5, 6 adjacent to one another with an axial spacing enclosed, wherein the first sealing ring 5 is formed as an O-ring 7 and out a fluorocarbon rubber (FPM), a low-temperature elastomer, consists. Such elastomers retain their good performance properties a temperature range from - 30 ° C to 200 ° C.

    Der zweite Dichtring, der auf der dem Raum 3 mit gasförmigem Medium zugewandten Seite des Trennkolbens 1 angeordnet ist, ist als Nutring-Dichtung 8 ausgebildet, wobei deren Dichtlippen 9, 10 durch die metallische Spannfeder 11 an die abzudichtenden Flächen 12, 13 von Trennkolben 1 und Zylinder 2 angedrückt sind. In axialer Richtung zwischen dem O-Ring 7 und der Nutring-Dichtung 8 ist in diesem Ausführungsbeispiel noch ein Führungsband 14 angeordnet, das aus PTFE besteht.The second sealing ring on the room 3 with gaseous medium facing side of the separating piston 1 is as a lip seal 8 formed, the sealing lips 9, 10 by the metallic tension spring 11 to the surfaces 12, 13 of the separating piston 1 and cylinder 2 to be sealed are pressed. In the axial direction between the O-ring 7 and the ring seal 8 is still a guide belt 14 in this exemplary embodiment arranged, which consists of PTFE.

    In Fig. 2 ist die Nutring-Dichtung aus Fig. 1 als Einzelteil gezeigt. Die Nutring-Dichtung 8 ist, im Längsschnitt betrachtet, im Wesentlichen C-förmig, axial in Richtung des Raums 3 mit gasförmigem Medium offen, wobei die metallische Spannfeder 11 die C-förmige Ausnehmung außenumfangsseitige begrenzt. Die Spannfeder 11 besteht dabei bevorzugt aus einem rostfreien Federstahl, so dass gleichbleibend gute Gebrauchseigenschaften unter allen Betriebsbedingungen während einer langen Gebrauchsdauer gegeben sind. Eine zuverlässige Abdichtung erfolgt auch bei Temperaturen von weniger als -30°C.In Fig. 2, the U-ring seal from Fig. 1 is shown as a single part. The groove ring seal 8, viewed in longitudinal section, is substantially C-shaped, axially in Direction of the room 3 with gaseous medium open, the metallic Tension spring 11 limits the C-shaped recess on the outer peripheral side. The Tension spring 11 is preferably made of a stainless spring steel, so that consistently good usage properties under all operating conditions during a long period of use. A reliable sealing takes place even at temperatures below -30 ° C.

    Claims (3)

    Kolbenspeicher, umfassend zumindest einen Trennkolben, der in einem Zylinder axial hin- und herbewegbar ist und zur Abdichtung eines mit einem gasförmigen Medium gefüllten Raums gegen einen mit einem flüssigen Medium gefüllten Raum außenumfangsseitig zumindest zwei mit axialem Abstand zueinander benachbart angeordnete Dichtringe aufweist, wobei einer der Dichtringe als O-Ring ausgebildet ist, dadurch gekennzeichnet, dass der O-Ring (7) auf der dem Raum (4) mit flüssigem Medium zugewandten Seite angeordnet ist und aus einem Tieftemperatur-Elastomer besteht und dass der zweite Dichtring (6) auf der dem Raum (3) mit gasförmigem Medium zugewandten Seite als Nutring-Dichtung (8) ausgebildet ist, deren Dichtlippen (9, 10) durch eine metallische Spannfeder (11) an die abzudichtenden Flächen (12, 13) von Trennkolben (1) und / oder Zylinder (2) anlegbar sind.Piston accumulator, comprising at least one separating piston, which can be moved axially back and forth in a cylinder and, for sealing a space filled with a gaseous medium against a space filled with a liquid medium, has at least two sealing rings arranged on the outer circumference on the outer circumference, one of which Sealing rings is designed as an O-ring, characterized in that the O-ring (7) is arranged on the side facing the space (4) with liquid medium and consists of a low-temperature elastomer and that the second sealing ring (6) on the the space (3) with the gaseous medium side is designed as a lip seal (8), the sealing lips (9, 10) of which by means of a metallic tension spring (11) on the surfaces (12, 13) of the separating piston (1) and / or cylinders (2) can be put on. Kolbenspeicher nach Anspruch 1, dadurch gekennzeichnet, dass das Tieftemperatur-Elastomer durch einen Fluor-Karbonkautschuk (FPM) gebildet ist.Piston accumulator according to claim 1, characterized in that the low-temperature elastomer is formed by a fluorocarbon rubber (FPM). Kolbenspeicher nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Nutring-Dichtung (8), im Längsschnitt betrachtet, im Wesentlichen C-förmig, axial in Richtung des Raums (3) mit gasförmigem Medium offen ausgebildet ist.Piston accumulator according to one of claims 1 or 2, characterized in that the U-ring seal (8), viewed in longitudinal section, is essentially C-shaped, axially open in the direction of the space (3) with gaseous medium.
    EP02000825A 2001-03-08 2002-01-15 Piston accumulator Withdrawn EP1239196A3 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE2001111332 DE10111332B4 (en) 2001-03-08 2001-03-08 piston accumulators
    DE10111332 2001-03-08

    Publications (2)

    Publication Number Publication Date
    EP1239196A2 true EP1239196A2 (en) 2002-09-11
    EP1239196A3 EP1239196A3 (en) 2004-09-15

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP02000825A Withdrawn EP1239196A3 (en) 2001-03-08 2002-01-15 Piston accumulator

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    DE (1) DE10111332B4 (en)

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN100376807C (en) * 2006-07-12 2008-03-26 三一重工股份有限公司 Piston type energy accumulator
    CN105673858A (en) * 2014-12-05 2016-06-15 舍弗勒技术股份两合公司 Sealing element of hydraulic control member for friction clutch or brake cylinder, and hydraulic control member with corresponding sealing element
    WO2018134244A1 (en) * 2017-01-17 2018-07-26 Liebherr-Components Kirchdorf GmbH Cylinder-piston device having a cylinder produced from a fibre-composite material

    Families Citing this family (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102017114621B4 (en) * 2017-06-30 2021-04-22 Schaeffler Technologies AG & Co. KG Lid arrangement for covering an annular cavity

    Citations (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE3619457A1 (en) 1986-06-10 1987-12-17 Bolenz & Schaefer Maschf Cylindrical pressure accumulator for hydraulic systems

    Family Cites Families (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR1509067A (en) * 1966-11-29 1968-01-12 Sud Aviation Piston for hydraulic accumulator
    DK34980A (en) * 1980-01-28 1981-07-29 W S Shamban Europs A S SEALING DEVICE WITH INSERT ACTIVATED SPRING
    US5163692A (en) * 1989-07-24 1992-11-17 Furon Company One-piece composite lip seal
    DE19740150A1 (en) * 1997-09-12 1999-03-25 Hydac Technology Gmbh Piston accumulator with depth filtration seal
    EP0907030A1 (en) * 1997-10-04 1999-04-07 Itt Manufacturing Enterprises, Inc. Accumulator, especially for vehicle brake system

    Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE3619457A1 (en) 1986-06-10 1987-12-17 Bolenz & Schaefer Maschf Cylindrical pressure accumulator for hydraulic systems

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN100376807C (en) * 2006-07-12 2008-03-26 三一重工股份有限公司 Piston type energy accumulator
    CN105673858A (en) * 2014-12-05 2016-06-15 舍弗勒技术股份两合公司 Sealing element of hydraulic control member for friction clutch or brake cylinder, and hydraulic control member with corresponding sealing element
    WO2018134244A1 (en) * 2017-01-17 2018-07-26 Liebherr-Components Kirchdorf GmbH Cylinder-piston device having a cylinder produced from a fibre-composite material

    Also Published As

    Publication number Publication date
    EP1239196A3 (en) 2004-09-15
    DE10111332B4 (en) 2004-08-19
    DE10111332A1 (en) 2002-09-19

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