EP1588056A1 - Method for the production of piston-type accumulators - Google Patents

Method for the production of piston-type accumulators

Info

Publication number
EP1588056A1
EP1588056A1 EP04702305A EP04702305A EP1588056A1 EP 1588056 A1 EP1588056 A1 EP 1588056A1 EP 04702305 A EP04702305 A EP 04702305A EP 04702305 A EP04702305 A EP 04702305A EP 1588056 A1 EP1588056 A1 EP 1588056A1
Authority
EP
European Patent Office
Prior art keywords
cover part
storage housing
longitudinal edge
housing
piston
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
EP04702305A
Other languages
German (de)
French (fr)
Other versions
EP1588056B1 (en
Inventor
Herbert Baltes
Walter Dorr
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.)
Hydac Technology GmbH
Original Assignee
Hydac Technology GmbH
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 Hydac Technology GmbH filed Critical Hydac Technology GmbH
Priority to EP07007946A priority Critical patent/EP1808605B1/en
Publication of EP1588056A1 publication Critical patent/EP1588056A1/en
Application granted granted Critical
Publication of EP1588056B1 publication Critical patent/EP1588056B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports
    • F15B2201/4155—Gas ports having valve 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
    • F15B2201/60—Assembling or methods for making accumulators
    • F15B2201/605—Assembling or methods for making housings therefor
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49394—Accumulator making
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y10T29/49917—Overedge assembling of seated part by necking in cup or tube wall
    • Y10T29/49918—At cup or tube end

Definitions

  • the invention relates to a method for producing piston accumulators with a accumulator housing and a separating piston which can be moved longitudinally in the accumulator housing and which separates two working spaces from one another within the accumulator housing and which is closed at the ends by a cover part.
  • piston accumulators belong to the so-called hydraulic accumulators, which serve, among other things, to absorb certain volumes of pressurized liquid (hydraulic medium) from a hydraulic system and to return them to the system if necessary. Since the hydraulic medium is under pressure, the hydraulic accumulators are treated like pressure vessels and must be designed for the maximum operating pressure, taking into account the acceptance standards of various installation countries. In most hydraulic systems, hydropneumatic (gas-pressurized) accumulators with a separating element are used today, with a piston serving as the separating element in the piston accumulators, which separates a liquid space as a working space from a gas space as a further working space within the accumulator housing of the piston accumulator.
  • hydraulic accumulators which serve, among other things, to absorb certain volumes of pressurized liquid (hydraulic medium) from a hydraulic system and to return them to the system if necessary. Since the hydraulic medium is under pressure, the hydraulic accumulators are treated like pressure vessels and must be designed for the maximum operating pressure, taking into account the acceptance standards of various
  • Nitrogen is regularly used as the working gas and the gas-tight piston largely allows decoupling from the gas space to the liquid space.
  • the liquid part is connected to the hydraulic circuit so that when the pressure rises, the piston accumulator absorbs liquid and the gas is compressed. When the pressure drops, the compressed gas expands and displaces the stored hydraulic fluid back into the hydraulic circuit.
  • piston accumulators One advantage of piston accumulators is that they can "work" in any position, but a vertical arrangement with the gas side upwards is preferred so that dirt particles from the liquid are prevented from settling on the piston seals.
  • the essential components of a piston accumulator are therefore an outer cylinder tube as the accumulator housing, the piston as a separating element with its sealing system and the end caps, which at the same time also contain a liquid and gas connection as cover parts.
  • the accumulator housing regularly has two functions, namely to store the internal pressure and to ensure that the piston is guided within the accumulator housing.
  • the end parts of the cover which close off the interior of the storage housing from the surroundings, are provided on the outer circumference with an external thread, which can be screwed into a corresponding internal thread along the free longitudinal edge of the storage housing over a predeterminable distance. Establishing the thread connection in question is time-consuming, which increases the cost of manufacturing the piston accumulator accordingly. Furthermore, safety measures are to be taken to secure the inserted cover part in its position in the storage case.
  • the object of the invention is to further improve the known manufacturing methods for piston accumulators in such a way that a functionally reliable and positionally secure connection is avoided while avoiding the otherwise usual threaded connections a cover part is ensured in the accumulator housing of a piston accumulator.
  • a related problem is solved by a method with the features of claim 1 in its entirety.
  • At least one of the two cover parts is inserted with its side opposite one side against a stop inside the storage housing and / or that the respective cover part is held in place by the clamping force of the supplied longitudinal edge End position is held. If a stop is provided on the inside of the storage housing, the cover part can be fixed against this stop during the infeed movement of the free longitudinal edge of the storage housing. Additionally or alternatively, there is also the possibility of simply inserting the cover part at the free end of the storage housing and then triggering the infeed movement for the free longitudinal edge of the storage housing.
  • the infeed movement can take place against the top of the cover, provided that the cover part is held in such a position; but it would also be conceivable for a free delivery movement for to execute the longitudinal edge, in order then to move the cover part against the free longitudinal edge in the ready-to-operate state via the piston guided in the storage housing, which then performs the clamping here.
  • a forming tool is provided for the infeed movement of the longitudinal edge of the storage housing, which, provided with infeed bevels, places the longitudinal edge of the storage housing on the cover part in such a way that it is fixed in the manner of the aforementioned clamping fit in the storage housing.
  • two forming tools on opposite sides carry out the fixing process for the respective end-side cover part in a common infeed movement on the storage housing by acting on the free longitudinal edge of the storage housing in each case. It has proven to be very advantageous for the generation of high fixing forces to feed both free ends of the cylindrical storage housing equally, the forming tool acting at one end of the storage housing being able to reliably support the forces which occur from the other side during the forming process with the other forming tool can be introduced into the storage case.
  • FIG. 2 shows in longitudinal section the upper part of a first embodiment of a piston accumulator housing with a forming tool lying above it;
  • the piston accumulator shown in FIG. 1 and belonging to the prior art has an outer cylinder tube as the accumulator housing 10, in which a piston 12 with its sealing system 14 on the outer circumference is guided as a separating element and can be moved longitudinally.
  • the piston 12 separates two working spaces 16, 18 from one another within the storage housing 10, one working space 16 serving to hold a working gas, in particular in the form of nitrogen, and the further second working space 18 forms the so-called. Liquid space for the piston accumulator.
  • the travel position of the piston 12 and thus the volume fractions of gas and fluid in the working spaces 16 and 18 vary.
  • At the front end of the accumulator housing 10 there is a cover part 20, 22 with a gas connection 24 for refilling of the nitrogen working gas and with a liquid connection 26 for connecting the piston accumulator to an overall hydraulic system, not shown.
  • the two cover parts 20, 22 are each provided with an external thread 28, which can be brought into engagement with an internal thread 30, which is arranged running along the free longitudinal edge 32 and opens out into the open.
  • an internal thread 30 which is arranged running along the free longitudinal edge 32 and opens out into the open.
  • the respective cover part 20, 22 is provided with a seal 34 for sealing the interior of the storage housing 10 from the surroundings. Attaching the thread sections
  • a possible anti-twist device for the respective cover part 20, 22 can be that a conventional adhesive lock is provided along the threads 28, 30, or the cover part is held in position with a conventional holding hole (with and without thread).
  • FIGS. 2ff allows a functionally reliable connection of the cover part to the associated storage housing 10 in a cost-effective manner.
  • FIGS. 2ff allows a functionally reliable connection of the cover part to the associated storage housing 10 in a cost-effective manner.
  • FIG. 2ff only the upper end of the storage housing 10 was shown in FIG. provides together with the upper cover part 20.
  • the method according to the invention is characterized, inter alia, by the fact that the respective cover part, here the cover part 20, is inserted into the storage housing 10 with its one lower side 36 against a stop 38 in the form of an annular surface, with the opposite side 40 of the cover part 20, this is fixed over the free longitudinal edge 32 of the storage housing 10, the longitudinal edge 32 experiencing an infeed movement on the cover part 20 for this purpose, which will be explained in more detail below.
  • a forming tool 42 is provided, which is provided with at least one infeed bevel 44, which places the longitudinal edge 32 on the cover part 20 in such a way that it rests in the manner of a clamp fit in the storage housing 10 between the stop 38 and the Longitudinal edge 32 is set.
  • the upper side 40 of the cover part 20 is provided with a contact surface 46 which is arranged to be conical to the longitudinal axis 48 of the storage housing 10.
  • the inclination of the contact surface 46 in question corresponds to the inclination of the feed bevel 44 of the forming tool 42; however, other obvious inclinations or inclinations are also conceivable here.
  • the feed direction for the forming tool 42 is the longitudinal axis 48 of the accumulator housing 10 or of the entire piston accumulator.
  • the separating element in the form of the piston 12 has been omitted in FIG. 2, as has the gas connection 24 shown in FIG. 1, which is also an integral part of the upper cover part 20 here.
  • the upper free end of the storage housing with its upper longitudinal edge 32 has a contour in accordance with one of the representations according to FIGS reduced, the transition point between the different wall thicknesses forming the stop 38 for the cover part 20.
  • the longitudinal edge 32 is preferably provided with a conical insertion bevel 50 on its side facing the cover part 20 and oriented towards the outside. The corresponding insertion slope 50 facilitates the insertion of the cover part 20 into the free upper end of the storage housing 10, which will be explained in more detail below.
  • the free longitudinal edge 32 which is shown in particular by the illustration according to FIGS. 4 and 5, can be provided on the outer circumferential side and oriented towards the free end of the storage housing 10 with a sliding bevel 52, which makes it easier for the longitudinal edge 32, from its cylindrical shape 3 to 6 change to a delivered inclined position, the sliding bevel 52 then sliding along the infeed bevel 44 of the shaping tool 42, provided that this is increasingly placed on the storage housing 10 in the infeed direction. If the infeed movement is completed with the forming tool 42, the longitudinal edge 32 is inclined to the cover part 20 along its contact surface 46 in the manner of a fixing bevel and thus holds the cover part 20 against the stop 38 inside the storage housing 10.
  • the free longitudinal edge 32 along its free end has a projection the upper second side 40 of the cover part 20 guided.
  • the forming tool 42 is moved away again from the storage housing 10 and then assumes, for example, its upper position shown in FIG.
  • the forming process for the respective longitudinal edge 32 of the storage housing 10 is preferably carried out cold; however, hot forming is also conceivable with corresponding heating of the storage housing material and preferably of the forming tool 42 itself.
  • a common, well-formable steel material is used as the material for the storage housing 10 with its longitudinal edge 32.
  • the height of the cover part 20 is in each case adapted to the operating conditions predetermined by the operation of the storage.
  • the cover part 20 is at least twice as long as the length of the longitudinal edge 32 between its free end and a deflection point 54, from which the longitudinal edge 32 is placed on the top of the cover.
  • the cover part 20 can protrude beyond the end of the longitudinal edge 32 of the storage housing 10; or, according to an embodiment not shown in detail, flush at the same height.
  • the fixing process for the respective end cover part 20, 22 is carried out simultaneously and together with essentially the same forming forces by acting on the free longitudinal edge 32 of the storage housing 10. It has been shown that in the forming solution in question, the opposite forming tool can simultaneously absorb the forces of the other forming tool as they occur during the forming process. In the case of this configuration, it is possible to save on complex support devices on the respectively opposite sides, where the forming tool 42 does not act. This also leads to a harmonious introduction of force into the storage housing 10 without the occurrence of damaging force peaks.
  • a placement tool 56 which, according to the illustration according to FIG. 4, comprises the free longitudinal edge 32 of the storage housing 10, the respective cover part 20, 22 into the storage housing 10 up to the stop 38 in the form of Ring surface are introduced.
  • the placement tool 56 has a feed slope 58, along which the cover part 20, 22 can slide on the outer circumferential side. The use of the assembly tool 56 ensures that any possible damage to the seal 34 of the respective cover part 20, 22 is avoided.
  • the placement tool 56 has a receiving space 60 into which the upper end of the storage housing 10 can be received, so that the feed slope 58 is flush with the upper edge of the longitudinal edge 32 and, moreover, continuously into the receiving area 62 for the actual cover part 20 , 22 passes into the memory housing 10.
  • the storage housing 10 is provided along its upper longitudinal edge 32 on the inside circumference and widening outwards with the insertion bevel 50, which results in a kind of shortened slip edge over which the respective cover part 20, 22 also introduce and then determine later.
  • the relevant variant can be selected if the cover seal 34 proves to be robust and should not be too susceptible to damage.
  • the same reference numerals are used for the same components and the modified embodiment is only described in terms of process technology insofar as it differs substantially from the method shown above.
  • the upper cover part 20 is held by the free longitudinal edge 32 of the storage housing 10 in such a way that the upper side projects beyond the end of the free longitudinal edge 32 with a predeterminable projection.
  • the stop 38 for the cover part 20 is provided with a bevel, against which the cover part 20 rests in a stepped step.
  • the ring seal 34 is in turn received on the outer circumference side, and because of the shown grading of the storage housing 10 and the cover part 20, there is the possibility of finely machining the storage housing 10 for a clean system with the sealing ring 34 at this point and the inside of the storage housing 10 to be left essentially unprocessed, provided that the adjustment range for the free longitudinal edges 32 of the storage housing 10 is addressed.
  • cover parts 20, 22 can therefore be A wide variety of designs fit precisely and securely and in a pressure-tight manner in the storage housings 10 and screw connections which are to be installed at a high cost and which are additionally to be secured can be completely dispensed with.

Abstract

The production process produces a piston-type accumulator with a housing (10) and a separate piston. The endfaces of the housing are each sealed by a cover part (20), fixed on one side (40) via the free longitudinal edge (32) of the housing, which is displaced towards the cover part to fit it in a positive secure connection.

Description

Hydac Technology GmbH, Industriegebiet, 66280 Sulzbach/Saar Hydac Technology GmbH, industrial area, 66280 Sulzbach / Saar
Verfahren zum Herstellen von KolbenspeichernMethod of manufacturing piston accumulators
Die Erfindung betrifft ein Verfahren zum Herstellen von Kolbenspeichern mit einem Speichergehäuse und einem im Speichergehäuse längsverfahrba- ren Trennkolben, der innerhalb des Speichergehäuses zwei Arbeitsräume voneinander trennt, das endseitig von jeweils einem Deckelteil verschlossen wird.The invention relates to a method for producing piston accumulators with a accumulator housing and a separating piston which can be moved longitudinally in the accumulator housing and which separates two working spaces from one another within the accumulator housing and which is closed at the ends by a cover part.
Kolbenspeicher gehören im weitesten Sinne zu den sog. Hydrospeichern, die unter anderem dazu dienen, bestimmte Volumen unter Druck stehender Flüssigkeit (Hydraulikmedium) einer Hydroanlage aufzunehmen und diese bei Bedarf an die Anlage zurückzugeben. Da sich das Hydraulikmedium unter Druck befindet, werden die Hydrospeicher wie Druckbehälter behandelt und müssen für den maximalen Betriebsüberdruck unter Berücksichtigung der Abnahmestandards von diversen Aufstellungsländern ausgelegt sein. In den meisten Hydroanlagen werden heutzutage hydropneumati- sche (gasbeaufschlagte) Speicher mit Trennelement eingesetzt, wobei bei den Kolbenspeichern als Trennelement ein Kolben dient, der innerhalb des Speichergehäuses des Kolbenspeichers einen Flüssigkeitsraum als Arbeitsraum von einem Gasraum als weiteren Arbeitsraum trennt. Als Arbeitsgas kommt regelmäßig Stickstoff zum Einsatz und der gasdichte Kolben erlaubt weitgehend eine Entkopplung von Gasraum zu Flüssigkeitsraum. Der Flüssigkeitsteil steht mit dem Hydrokreislauf in Verbindung, so dass beim Anstieg des Druckes der Kolbenspeicher Flüssigkeit aufnimmt und das Gas dabei komprimiert wird. Bei sinkendem Druck dehnt sich das verdichtete Gas aus und verdrängt dabei die gespeicherte Druckflüssigkeit zurück in den Hydrokreislauf. Ein Vorteil von Kolbenspeichern ist, dass sie in jeder Lage „arbeiten" können, wobei jedoch eine senkrechte Anordnung mit der Gasseite nach oben vorzuziehen ist, damit ein Absetzen von Schmutzpartikeln aus der Flüssigkeit auf den Kolbendichtungen vermieden wird.In the broadest sense, piston accumulators belong to the so-called hydraulic accumulators, which serve, among other things, to absorb certain volumes of pressurized liquid (hydraulic medium) from a hydraulic system and to return them to the system if necessary. Since the hydraulic medium is under pressure, the hydraulic accumulators are treated like pressure vessels and must be designed for the maximum operating pressure, taking into account the acceptance standards of various installation countries. In most hydraulic systems, hydropneumatic (gas-pressurized) accumulators with a separating element are used today, with a piston serving as the separating element in the piston accumulators, which separates a liquid space as a working space from a gas space as a further working space within the accumulator housing of the piston accumulator. Nitrogen is regularly used as the working gas and the gas-tight piston largely allows decoupling from the gas space to the liquid space. The liquid part is connected to the hydraulic circuit so that when the pressure rises, the piston accumulator absorbs liquid and the gas is compressed. When the pressure drops, the compressed gas expands and displaces the stored hydraulic fluid back into the hydraulic circuit. One advantage of piston accumulators is that they can "work" in any position, but a vertical arrangement with the gas side upwards is preferred so that dirt particles from the liquid are prevented from settling on the piston seals.
Die wesentlichen Bestandteile eines Kolbenspeichers sind mithin als Speichergehäuse ein äußeres Zylinderrohr, der Kolben als Trennelement mit seinem Dichtungssystem sowie die stirnseitigen Verschlußdeckel, die als Deckelteile gleichzeitig auch einen Flüssigkeits- und Gasanschluß beinhalten. Dem Speichergehäuse kommen regelmäßig zwei Funktionen zu, näm- lieh einmal den inneren Druck zu bevorraten und zum anderen die Führung des Kolbens innerhalb des Speichergehäuses zu gewährleisten. Die stirnseitig, das Innere des Speichergehäuses gegenüber der Umgebung abschließenden Deckelteile sind außenumfangsseitig mit einem Außengewinde versehen,- das in ein korrespondierendes Innengewinde entlang des frei- en Längsrandes des Speichergehäuses über eine vorgebbare Wegstrecke einschraubbar ist. Das Herstellen der dahingehenden Gewindeverbindung ist zeitaufwendig, was die Herstellkosten für den Kolbenspeicher entsprechend verteuert. Des weiteren sind Sicherungsmaßnähmen vorzusehen, um das eingebrachte Deckelteil in seiner Lage im Speichergehäuse zu sichern.The essential components of a piston accumulator are therefore an outer cylinder tube as the accumulator housing, the piston as a separating element with its sealing system and the end caps, which at the same time also contain a liquid and gas connection as cover parts. The accumulator housing regularly has two functions, namely to store the internal pressure and to ensure that the piston is guided within the accumulator housing. The end parts of the cover, which close off the interior of the storage housing from the surroundings, are provided on the outer circumference with an external thread, which can be screwed into a corresponding internal thread along the free longitudinal edge of the storage housing over a predeterminable distance. Establishing the thread connection in question is time-consuming, which increases the cost of manufacturing the piston accumulator accordingly. Furthermore, safety measures are to be taken to secure the inserted cover part in its position in the storage case.
Ausgehend von diesem bekannten Stand der Technik stellt sich die Erfindung die Aufgabe, die bekannten Herstellverfahren für Kolbenspeicher dahingehend weiter zu verbessern, dass unter Vermeidung der sonst üblichen Gewindeverbindungen eine funktionssichere und lagesichere Verbindung eines Deckelteils im Speichergehäuse eines Kolbenspeichers gewährleistet ist. Eine dahingehende Aufgabe löst ein Verfahren mit den Merkmalen des Patentanspruches 1 in seiner Gesamtheit.Starting from this known prior art, the object of the invention is to further improve the known manufacturing methods for piston accumulators in such a way that a functionally reliable and positionally secure connection is avoided while avoiding the otherwise usual threaded connections a cover part is ensured in the accumulator housing of a piston accumulator. A related problem is solved by a method with the features of claim 1 in its entirety.
Dadurch, dass gemäß dem kennzeichnenden Teil des Patentanspruches 1 an der einen Seite des Deckelteils dieses über den freien Längsrand des Speichergehäuses festgelegt wird, der zu diesem Zweck eine Zustellbewegung auf das Deckelteil erfährt, wird unter Vermeidung der sonst üblichen Schraubverbindungslösung für das jeweilige Deckelteil eine Art Klemmsitz am jeweils freien Ende des Speichergehäuses erreicht, bei der das Deckelteil zumindest über den freien Längsrand des Speichergehäuses nach dessen Zustell bewegung auf das Deckelteil festgeklemmt wird, wobei es genügt, wenn ein Teil des freien Längsrandes den dahingehenden Klemmsitz verwirklicht.Characterized in that according to the characterizing part of patent claim 1 on one side of the cover part this is fixed over the free longitudinal edge of the storage housing, which for this purpose undergoes an infeed movement on the cover part, avoiding the otherwise usual screw connection solution for the respective cover part Clamping seat is reached at the free end of the storage housing, in which the cover part is clamped at least over the free longitudinal edge of the storage housing after its delivery movement on the cover part, it being sufficient if part of the free longitudinal edge realizes the relevant clamping seat.
Bei einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens ist dabei vorgesehen, dass mindestens eines der beiden Deckelteile mit seiner der einen Seite gegenüberliegenden Seite gegen einen Anschlag im Inneren des Speichergehäuses in dieses eingesetzt wird und/oder dass das jeweilige Deckelteil durch die Klemmkraft des zugestellten Längsrandes in seiner Endlage gehalten wird. Sofern ein Anschlag an der Innenseite des Speichergehäuses vorgesehen ist, kann bei der Zustell bewegung des freien Längsrandes des Speichergehäuses das Deckelteil gegen diesen Anschlag festgelegt werden. Zusätzlich oder alternativ besteht aber auch die Mög- lichkeit, das Deckelteil einfach am freien Ende des Speichergehäuses einzusetzen und dann die Zustellbewegung für den freien Längsrand des Speichergehäuses auszulösen. Die Zustell bewegung kann dabei gegen die Dek- keloberseite erfolgen, sofern das Deckelteil in einer dahingehenden Lage gehalten wird; es wäre aber auch denkbar, eine freie Zustellbewegung für den Längsrand auszuführen, um dann anschließend im betriebsbereiten Zustand das Deckelteil über den im Speichergehäuse geführten Kolben gegen den freien Längsrand zu verfahren, der dann dergestalt die Klemmung hier vornimmt.In a preferred embodiment of the method according to the invention, it is provided that at least one of the two cover parts is inserted with its side opposite one side against a stop inside the storage housing and / or that the respective cover part is held in place by the clamping force of the supplied longitudinal edge End position is held. If a stop is provided on the inside of the storage housing, the cover part can be fixed against this stop during the infeed movement of the free longitudinal edge of the storage housing. Additionally or alternatively, there is also the possibility of simply inserting the cover part at the free end of the storage housing and then triggering the infeed movement for the free longitudinal edge of the storage housing. The infeed movement can take place against the top of the cover, provided that the cover part is held in such a position; but it would also be conceivable for a free delivery movement for to execute the longitudinal edge, in order then to move the cover part against the free longitudinal edge in the ready-to-operate state via the piston guided in the storage housing, which then performs the clamping here.
Vorzugsweise ist dabei weiter vorgesehen, dass für die Zustell bewegung des Längsrandes des Speichergehäuses ein Umformwerkzeug vorgesehen wird, das mit Zustellschrägen versehen den Längsrand des Speichergehäuses auf das Deckelteil derart legt, dass dieses in der Art des genannten Klemmsitzes im Speichergehäuse festgelegt wird.It is preferably further provided that a forming tool is provided for the infeed movement of the longitudinal edge of the storage housing, which, provided with infeed bevels, places the longitudinal edge of the storage housing on the cover part in such a way that it is fixed in the manner of the aforementioned clamping fit in the storage housing.
Bei einer besonders vorteilhaften Ausgestaltung des erfindungsgemäßen Verfahrens nehmen in einer gemeinsamen Zustellbewegung auf das Speichergehäuse zwei Umform Werkzeuge an gegenüberliegenden Seiten den Festlegevorgang für das jeweilige endseitige Deckelteil vor, indem diese auf den jeweils freien Längsrand des Speichergehäuses einwirken. Es hat sich für das Erzeugen hoher Festlegekräfte als sehr vorteilhaft erwiesen, beide freien Enden des zylindrischen Speichergehäuses gleichermaßen zuzustellen, wobei das an einem Ende des Speichergehäuses wirkende Umform- Werkzeug sicher die Kräfte mit abstützen kann, die von der anderen Seite her beim Umformvorgang mit dem anderen Umformwerkzeug in das Speichergehäuse eingeleitet werden.In a particularly advantageous embodiment of the method according to the invention, two forming tools on opposite sides carry out the fixing process for the respective end-side cover part in a common infeed movement on the storage housing by acting on the free longitudinal edge of the storage housing in each case. It has proven to be very advantageous for the generation of high fixing forces to feed both free ends of the cylindrical storage housing equally, the forming tool acting at one end of the storage housing being able to reliably support the forces which occur from the other side during the forming process with the other forming tool can be introduced into the storage case.
Weitere vorteilhafte Ausführungsformen sind Gegenstand der sonstigen Un- teransprüche.Further advantageous embodiments are the subject of the other subclaims.
Im folgenden wird das erfindungsgemäße Verfahren anhand der Zeichnung näher erläutert. Dabei zeigen in prinzipieller und nicht maßstäblicher Darstellung die Fig.1 einen Längsschnitt durch einen Kolbenspeicher nach demThe method according to the invention is explained in more detail below with reference to the drawing. In principle and not to scale, show the 1 shows a longitudinal section through a piston accumulator according to the
Stand der Technik;State of the art;
Fig.2 im Längsschnitt den oberen Teil einer ersten Ausführungsform eines Kolbenspeichergehäuses mit darüberliegendem Umformwerkzeug;2 shows in longitudinal section the upper part of a first embodiment of a piston accumulator housing with a forming tool lying above it;
Fig.3 und 4 im Längsschnitt das Aufsetzen eines Montagewerkzeuges auf das freie Ende des Speichergehäuses zwecks Festlegen des jeweiligen Deckelteils;3 and 4 in longitudinal section the placement of an assembly tool on the free end of the storage housing for the purpose of fixing the respective cover part;
Fig.5 und 6 im Längsschnitt den oberen Bereich des Speichergehäuses in zwei verschiedenen Varianten mit innen liegenden Einführ- schrägen zum Einführen des jeweiligen Deckelteils;5 and 6 in longitudinal section the upper area of the storage housing in two different variants with internal insertion bevels for inserting the respective cover part;
Fig.7 ebenfalls im Längsschnitt den oberen Teil einer zweiten Ausführungsform eines Kolbenspeichergehäuses mit geändertem Deckelteil.7 also in longitudinal section, the upper part of a second embodiment of a piston accumulator housing with a modified cover part.
Der in Fig.1 gezeigte, zum Stand der Technik zählende Kolbenspeicher weist als Speichergehäuse 10 ein äußeres Zylinderrohr auf, in dem als Trennelement ein Kolben 12 mit seinem außenumfangsseitigen Dichtsystem 14 längsverfahrbar geführt ist. Der Kolben 12 trennt innerhalb des Speichergehäuses 10 zwei Arbeitsräume 16,18 voneinander ab, wobei der eine Arbeitsraum 16 der Aufnahme eines Arbeitsgases, insbesondere in Form von Stickstoff, dient und der weitere zweite Arbeitsraum 18 bildet den sog. Flüssigkeitsraum für den Kolbenspeicher aus. In Abhängigkeit der Betriebssituation des Speichers variieren die Verfahrstellung des Kolbens 12 und mithin die Volumenanteile an Gas und Fluid in den Arbeitsräumen 16 bzw. 18. Am stirnseitigen Ende des Speichergehäuses 10 ist jeweils ein Deckel- teil 20,22 angeordnet mit einem Gasanschluß 24 zum Nachfüllen des Stickstoffarbeitsgases und mit einem Flüssigkeitsanschluß 26 zum Anschließen des Kolbenspeichers an ein nicht näher dargestelltes Hydro-Gesamtanlagen- system.The piston accumulator shown in FIG. 1 and belonging to the prior art has an outer cylinder tube as the accumulator housing 10, in which a piston 12 with its sealing system 14 on the outer circumference is guided as a separating element and can be moved longitudinally. The piston 12 separates two working spaces 16, 18 from one another within the storage housing 10, one working space 16 serving to hold a working gas, in particular in the form of nitrogen, and the further second working space 18 forms the so-called. Liquid space for the piston accumulator. Depending on the operating situation of the accumulator, the travel position of the piston 12 and thus the volume fractions of gas and fluid in the working spaces 16 and 18 vary. At the front end of the accumulator housing 10 there is a cover part 20, 22 with a gas connection 24 for refilling of the nitrogen working gas and with a liquid connection 26 for connecting the piston accumulator to an overall hydraulic system, not shown.
Die beiden Deckelteile 20,22 sind jeweils mit einem Außengewinde 28 versehen, das in Eingriff bringbar ist mit einem Innengewinde 30, das entlang dem freien Längsrand 32 verlaufend angeordnet ist und nach außen hin ins Freie mündet. Außenumfangsseitig ist das jeweilige Deckelteil 20,22 mit einer Dichtung 34 versehen zum Abdichten des Inneren des Speicher- gehäuses 10 von der Umgebung. Das Anbringen der GewindestreckenThe two cover parts 20, 22 are each provided with an external thread 28, which can be brought into engagement with an internal thread 30, which is arranged running along the free longitudinal edge 32 and opens out into the open. On the outer circumference, the respective cover part 20, 22 is provided with a seal 34 for sealing the interior of the storage housing 10 from the surroundings. Attaching the thread sections
28,30 ist mit einem gewissen Herstel laufwand verbunden, was die bekannten Kolbenspeicher aufwendig und teuer in der Herstellung werden läßt. Auch ist zusätzlich eine Verdrehsicherung für das jeweilige Deckelteil 20,22 notwendig, um seine Lagefixierung innerhalb des Speichergehäuses 10 sicherzustellen. Eine mögliche Verdrehsicherung für das jeweilige Dek- kelteil 20,22 kann darin bestehen, dass man entlang der Gewinde 28,30 eine übliche Klebstoffsicherung vorsieht oder der Deckelteil wird mit einer üblichen Haltebohrung (mit und ohne Gewinde) in seiner Lage gehalten.28.30 is connected to a certain manufacturer running wall, which makes the known piston accumulator complex and expensive to manufacture. An anti-rotation device is also necessary for the respective cover part 20, 22 in order to ensure that it is fixed in position within the storage housing 10. A possible anti-twist device for the respective cover part 20, 22 can be that a conventional adhesive lock is provided along the threads 28, 30, or the cover part is held in position with a conventional holding hole (with and without thread).
Ausgehend von dieser bekannten Lösung wird nunmehr anhand der Fig.2ff das erfindungsgemäße Verfahren näher vorgestellt, das in kostengünstiger Weise eine funktionssichere Verbindung von Deckelteil mit dem zugehörigen Speichergehäuse 10 erlaubt. Der einfacheren Darstellung wegen wurde demgemäß in der Fig.2 nur das obere Ende des Speichergehäuses 10 darge- stellt zusammen mit dem oberen Deckelteil 20. Sofern im folgenden dieselben Bauteile angesprochen sind wie bei der bekannten Ausführungsform nach der Fig.1 , werden die dahingehenden Bauteile mit denselben Bezugszeichen wie in der Fig.1 wiedergegeben bezeichnet.Proceeding from this known solution, the method according to the invention is now presented in more detail with reference to FIGS. 2ff, which allows a functionally reliable connection of the cover part to the associated storage housing 10 in a cost-effective manner. For the sake of simplicity, only the upper end of the storage housing 10 was shown in FIG. provides together with the upper cover part 20. If the same components are addressed in the following as in the known embodiment according to FIG. 1, the relevant components are designated with the same reference numerals as shown in FIG.
Das erfindungsgemäße Verfahren ist unter anderem dadurch charakterisiert, dass das jeweilige Deckelteil, hier das Deckelteil 20, mit seiner einen unteren Seite 36 gegen einen Anschlag 38 in Form einer Ringfläche im Inneren des Speichergehäuses 10 in dieses eingesetzt wird, wobei an der gegen- überliegenden Seite 40 des Deckelteils 20 dieses über den freien Längsrand 32 des Speichergehäuses 10 festgelegt wird, wobei zu diesem Zweck der Längsrand 32 eine Zustellbewegung auf das Deckelteil 20 erfährt, was im folgenden noch näher erläutert werden wird.The method according to the invention is characterized, inter alia, by the fact that the respective cover part, here the cover part 20, is inserted into the storage housing 10 with its one lower side 36 against a stop 38 in the form of an annular surface, with the opposite side 40 of the cover part 20, this is fixed over the free longitudinal edge 32 of the storage housing 10, the longitudinal edge 32 experiencing an infeed movement on the cover part 20 for this purpose, which will be explained in more detail below.
Für die Zustellung des Längsrandes 32 des Speichergehäuses 10 dient ein Umformwerkzeug 42, das mit mindestens einer Zustellschräge 44 versehen ist, welche den Längsrand 32 derart auf das Deckelteil 20 legt, dass dieses in der Art eines Klemmsitzes im Speichergehäuse 10 zwischen dem Anschlag 38 und dem Längsrand 32 festgelegt ist. Zum Erstellen des dahinge- henden Klemmsitzes ist die obere Seite 40 des Deckelteils 20 mit einer Anlagefläche 46 versehen, die konisch zur Längsachse 48 des Speichergehäuses 10 verlaufend angeordnet ist. Die Neigung der dahingehenden Anlagefläche 46 entspricht der Neigung der Zustellschräge 44 des Umformwerk- zeuges 42; es sind hier aber auch andere sinnfällige Neigungen bzw. Schrägen denkbar. Wie die Darstellung nach der Fig.2 zeigt, ist die Zustellrichtung für das Umformwerkzeug 42 die Längsachse 48 des Speichergehäuses 10 bzw. des gesamten Kolbenspeichers. Der besseren Darstellung wegen wurde in der Fig.2 das Trennelement in Form des Kolbens 12 weggelassen ebenso wie der in Fig.1 dargestellte Gasanschluß 24, der auch hier integraler Bestandteil des oberen Deckelteils 20 ist. Bevor die Klemmverbindung über das Umformwerkzeug 42 hergestellt wird, weist das obere freie Ende des Speichergehäuses mit seinem oberen Längsrand 32 eine Kontur auf gemäß einer der Darstellungen nach den Fig.3 bis 6. Dabei ist der Längsrand 32 gegenüber dem sonstigen Speichergehäuse 10 in der Wandstärke reduziert, wobei die Übergangsstelle zwischen den verschiedenen Wandstärken den Anschlag 38 für das Deckelteil 20 bildet. Des weiteren wird der Längsrand 32 vorzugsweise auf seiner dem Deckelteil 20 zugewandten Seite und nach außen hin orientiert mit einer konischen Einführschräge 50 versehen. Die dahingehende Einführschräge 50 erleichtert das Einführen des Deckelteils 20 in das freie obere Ende des Speichergehäuses 10, was im folgenden noch näher erläutert werden wird.For the infeed of the longitudinal edge 32 of the storage housing 10, a forming tool 42 is provided, which is provided with at least one infeed bevel 44, which places the longitudinal edge 32 on the cover part 20 in such a way that it rests in the manner of a clamp fit in the storage housing 10 between the stop 38 and the Longitudinal edge 32 is set. To create the relevant clamping fit, the upper side 40 of the cover part 20 is provided with a contact surface 46 which is arranged to be conical to the longitudinal axis 48 of the storage housing 10. The inclination of the contact surface 46 in question corresponds to the inclination of the feed bevel 44 of the forming tool 42; however, other obvious inclinations or inclinations are also conceivable here. As the illustration according to FIG. 2 shows, the feed direction for the forming tool 42 is the longitudinal axis 48 of the accumulator housing 10 or of the entire piston accumulator. For the sake of better illustration, the separating element in the form of the piston 12 has been omitted in FIG. 2, as has the gas connection 24 shown in FIG. 1, which is also an integral part of the upper cover part 20 here. Before the clamping connection is made via the forming tool 42, the upper free end of the storage housing with its upper longitudinal edge 32 has a contour in accordance with one of the representations according to FIGS reduced, the transition point between the different wall thicknesses forming the stop 38 for the cover part 20. Furthermore, the longitudinal edge 32 is preferably provided with a conical insertion bevel 50 on its side facing the cover part 20 and oriented towards the outside. The corresponding insertion slope 50 facilitates the insertion of the cover part 20 into the free upper end of the storage housing 10, which will be explained in more detail below.
Des weiteren kann der freie Längsrand 32, was insbesondere die Darstellung nach den Fig.4 und 5 zeigt, außenumfangsseitig und zum freien Ende des Speichergehäuses 10 hin orientiert mit einer Gleitschräge 52 versehen sein, was es dem Längsrand 32 erleichtert, aus seiner zylindrischen Form gemäß den Darstellungen nach den Fig.3 bis 6 in eine zugestellte geneigte Stellung überzugehen, wobei die Gleitschräge 52 dann entlang der Zustellschräge 44 des Umformwerkzeuges 42 abgleitet, sofern dieses in Zustellrichtung auf das Speichergehäuse 10 zusehends aufgesetzt wird. Ist die Zustellbewegung mit dem Umformwerkzeug 42 abgeschlossen, ist der Längs- rand 32 auf das Deckelteil 20 entlang seiner Anlagefläche 46 in der Art einer Festlegeschräge ausgebildet geneigt und hält dergestalt das Deckelteil 20 gegen den Anschlag 38 im Inneren des Speichergehäuses 10 fest. Um die sichere Position des Deckelteils 20 im Speichergehäuse 10 nicht zu gefährden und um auch das Deckelteil 20 vor schädigenden Krafteinleitungen zu schützen, ist, wie dies die Darstellung nach der Fig.2 zeigt, der freie Längsrand 32 entlang seinem freien Ende mit einem Überstand über die oben liegende zweite Seite 40 des Deckelteils 20 geführt. Nach Festlegen der dahingehenden Klemmverbindung wird das Umformwerkzeug 42 vom Speichergehäuse 10 wieder wegbewegt und nimmt dann beispielsweise seine in der Fig.2 gezeigte obere Stellung ein. Vorzugsweise erfolgt der Umformvorgang für den jeweiligen Längsrand 32 des Speichergehäuses 10 kalt; es ist aber auch ein Warmumformen denkbar mit entsprechender Erwärmung des Speichergehäusematerials sowie vorzugsweise des Umformwerk- zeuges 42 selbst. Als Werkstoff für das Speichergehäuse 10 mit seinem Längsrand 32 kommt ein üblicher, gut formbarer Stahl Werkstoff zum Einsatz. Um die Klemmkräfte optimal in das Deckelteil 20 einzuleiten und um auch randseitig für das Deckelteil 20 eine gute Abstützung im Speichergehäuse 10 zu gewährleisten, ist vorgesehen, dass die Höhe des Deckelteils 20 jeweils an die durch den Betrieb des Speichers vorgegebenen Einsatzbedingungen angepaßt ist. Im gezeigten Fall ist das Deckelteil 20 mindestens doppelt so groß ist wie die Länge des Längsrandes 32 zwischen seinem freien Ende und einer Umlenkstelle 54, ab der der Längsrand 32 auf die Deckeloberseite aufgelegt ist.Furthermore, the free longitudinal edge 32, which is shown in particular by the illustration according to FIGS. 4 and 5, can be provided on the outer circumferential side and oriented towards the free end of the storage housing 10 with a sliding bevel 52, which makes it easier for the longitudinal edge 32, from its cylindrical shape 3 to 6 change to a delivered inclined position, the sliding bevel 52 then sliding along the infeed bevel 44 of the shaping tool 42, provided that this is increasingly placed on the storage housing 10 in the infeed direction. If the infeed movement is completed with the forming tool 42, the longitudinal edge 32 is inclined to the cover part 20 along its contact surface 46 in the manner of a fixing bevel and thus holds the cover part 20 against the stop 38 inside the storage housing 10. In order not to endanger the safe position of the cover part 20 in the storage housing 10 and also to protect the cover part 20 from damaging force introductions, as the illustration according to FIG. 2 shows, the free longitudinal edge 32 along its free end has a projection the upper second side 40 of the cover part 20 guided. After the relevant clamping connection has been established, the forming tool 42 is moved away again from the storage housing 10 and then assumes, for example, its upper position shown in FIG. The forming process for the respective longitudinal edge 32 of the storage housing 10 is preferably carried out cold; however, hot forming is also conceivable with corresponding heating of the storage housing material and preferably of the forming tool 42 itself. A common, well-formable steel material is used as the material for the storage housing 10 with its longitudinal edge 32. In order to optimally introduce the clamping forces into the cover part 20 and also to ensure good support in the storage housing 10 at the edge for the cover part 20, it is provided that the height of the cover part 20 is in each case adapted to the operating conditions predetermined by the operation of the storage. In the case shown, the cover part 20 is at least twice as long as the length of the longitudinal edge 32 between its free end and a deflection point 54, from which the longitudinal edge 32 is placed on the top of the cover.
Wie die Darstellung gemäß der Fig.7 für eine geänderte Ausführungsform zeigt, kann jedoch das Deckelteil 20 über das Ende des Längsrandes 32 des Speichergehäuses 10 vorstehen; oder gemäß einer nicht näher dargestellten Ausführungsform in derselben Höhe bündig abschließen.As the illustration according to FIG. 7 shows for a modified embodiment, however, the cover part 20 can protrude beyond the end of the longitudinal edge 32 of the storage housing 10; or, according to an embodiment not shown in detail, flush at the same height.
Bei einer besonders bevorzugten Ausgestaltung (nicht dargestellt) des erfindungsgemäßen Verfahrens wird in einer gemeinsamen Zustellbewegung zweier Umformwerkzeuge 42 an gegenüberliegenden Seiten des Speichergehäuses 10 der Festlegevorgang für das jeweilige endseitige Deckelteil 20,22 zeitgleich und gemeinsam mit im wesentlichen gleichen Umformkräften durch Einwirkung auf den jeweils freien Längsrand 32 des Speicher- gehäuses 10 vorgenommen. Es hat sich gezeigt, dass bei der dahingehenden Umformlösung das jeweils gegenüberliegende Umformwerkzeug gleichzeitig beim Umformen die Kräfte des anderen Umformwerkzeuges mit aufnehmen kann, wie sie während des Umform Vorganges auftreten. Bei der dahingehenden Ausgestaltung kann auf aufwendige Abstützvorrichtun- gen auf den jeweils gegenüberliegenden Seiten, wo das Umformwerkzeug 42 nicht einwirkt, eingespart werden. Auch kommt es dergestalt zu einer harmonischen Krafteinleitung in das Speichergehäuse 10 ohne Auftreten von schädigenden Kraftspitzen.In a particularly preferred embodiment (not shown) of the method according to the invention, in a common infeed movement two forming tools 42 on opposite sides of the storage housing 10, the fixing process for the respective end cover part 20, 22 is carried out simultaneously and together with essentially the same forming forces by acting on the free longitudinal edge 32 of the storage housing 10. It has been shown that in the forming solution in question, the opposite forming tool can simultaneously absorb the forces of the other forming tool as they occur during the forming process. In the case of this configuration, it is possible to save on complex support devices on the respectively opposite sides, where the forming tool 42 does not act. This also leads to a harmonious introduction of force into the storage housing 10 without the occurrence of damaging force peaks.
Wie die Fig.3 und 4 zeigen, kann mittels eines Aufsetzwerkzeuges 56, das gemäß der Darstellung nach der Fig.4 den freien Längsrand 32 des Speichergehäuses 10 umfaßt, das jeweilige Deckelteil 20,22 in das Speichergehäuse 10 bis zum Anschlag 38 in Form der Ringfläche eingebracht werden. Für den dahingehenden Einführvorgang weist das Aufsetzwerkzeug 56 eine Zuführschräge 58 auf, entlang der außenumfangsseitig das Deckelteil 20,22 abgleiten kann. Durch den Einsatz des Montagewerkzeuges 56 ist erreicht, dass eine mögliche Dichtungsbeschädigung der Dichtung 34 des jeweiligen Deckelteils 20,22 mit Sicherheit vermieden ist. Neben der Zuführschräge 58 weist das Aufsetzwerkzeug 56 einen Aufnahmeraum 60 auf, in den das obere Ende des Speichergehäuses 10 aufnehmbar ist, so dass die Zuführschräge 58 bündig mit der Oberkante des Längsrandes 32 abschließt und im übrigen kontinuierlich in den Aufnahmebereich 62 für das eigentliche Deckelteil 20,22 im Speichergehäuse 10 übergeht. Bei den Ausführungsformen nach den Fig.5 und 6 ist das Speichergehäuse 10 entlang seines oberen Längsrandes 32 innenumfangsseitig und nach außen hin sich erweiternd mit der Einführschräge 50 versehen, was eine Art verkürzte Schlupfkante ergibt, über die sich dergestalt das jeweilige Deckel- teil 20,22 gleichfalls einführen und später dann festlegen läßt. Die dahingehende Variante kann gewählt werden, sofern die Deckeldichtung 34 sich als robust erweist und für Beschädigungen nicht allzu anfällig sein sollte.As shown in FIGS. 3 and 4, by means of a placement tool 56 which, according to the illustration according to FIG. 4, comprises the free longitudinal edge 32 of the storage housing 10, the respective cover part 20, 22 into the storage housing 10 up to the stop 38 in the form of Ring surface are introduced. For the relevant insertion process, the placement tool 56 has a feed slope 58, along which the cover part 20, 22 can slide on the outer circumferential side. The use of the assembly tool 56 ensures that any possible damage to the seal 34 of the respective cover part 20, 22 is avoided. In addition to the feed slope 58, the placement tool 56 has a receiving space 60 into which the upper end of the storage housing 10 can be received, so that the feed slope 58 is flush with the upper edge of the longitudinal edge 32 and, moreover, continuously into the receiving area 62 for the actual cover part 20 , 22 passes into the memory housing 10. In the embodiments according to FIGS. 5 and 6, the storage housing 10 is provided along its upper longitudinal edge 32 on the inside circumference and widening outwards with the insertion bevel 50, which results in a kind of shortened slip edge over which the respective cover part 20, 22 also introduce and then determine later. The relevant variant can be selected if the cover seal 34 proves to be robust and should not be too susceptible to damage.
Für die geänderte Ausführungsform nach der Fig.7 werden für dieselben Bauteile dieselben Bezugszeichen verwendet und die geänderte Ausführungsform verfahrenstechnisch nur noch insofern beschrieben, als sie sich wesentlich von dem vorangehend aufgezeigten Verfahren unterscheidet. Bei der gezeigten Ausführungsform wird das obere Deckelteil 20 von dem freien Längsrand 32 des Speichergehäuses 10 derart gehalten, dass die Oberseite mit einem vorgebbaren Überstand über das Ende des freien Längsrandes 32 hinausragt. Der Anschlag 38 für das Deckelteil 20 ist bei der Ausführungsform nach der Fig. 7 mit einer Schräge versehen, gegen die sich in einem gestuften Absatz das Deckelteil 20 anlehnt. In der zurückversetzten abschnittsweisen Stufe 64 ist außenumfangsseitig wiederum die Ringdichtung 34 aufgenommen, wobei aufgrund der aufgezeigten Stufung von Speichergehäuse 10 und Deckelteil 20 die Möglichkeit besteht, das Speichergehäuse 10 für eine saubere Anlage mit dem Dichtring 34 an dieser Stelle entsprechend feinst zu bearbeiten und die Innenseite des Speichergehäuses 10 im wesentlichen unbearbeitet zu lassen, sofern der Zu- Stellbereich für die freien Längsränder 32 des Speichergehäuses 10 angesprochen ist.For the modified embodiment according to FIG. 7, the same reference numerals are used for the same components and the modified embodiment is only described in terms of process technology insofar as it differs substantially from the method shown above. In the embodiment shown, the upper cover part 20 is held by the free longitudinal edge 32 of the storage housing 10 in such a way that the upper side projects beyond the end of the free longitudinal edge 32 with a predeterminable projection. In the embodiment according to FIG. 7, the stop 38 for the cover part 20 is provided with a bevel, against which the cover part 20 rests in a stepped step. In the recessed section 64, the ring seal 34 is in turn received on the outer circumference side, and because of the shown grading of the storage housing 10 and the cover part 20, there is the possibility of finely machining the storage housing 10 for a clean system with the sealing ring 34 at this point and the inside of the storage housing 10 to be left essentially unprocessed, provided that the adjustment range for the free longitudinal edges 32 of the storage housing 10 is addressed.
Mit der genannten Umformtechnik bezogen auf die freien Längsränder 32 des Speichergehäuses 10 lassen sich mithin Deckelteile 20,22 in den ver- schiedensten Ausführungen paßgenau und sicher sowie druckdicht in den Speichergehäusen 10 festlegen und auf kosten intensiv anzubringende Schraubverbindungen an dieser Stelle, die zusätzlich noch zu sichern sind, kann vollständig verzichtet werden. With the aforementioned forming technology, based on the free longitudinal edges 32 of the storage housing 10, cover parts 20, 22 can therefore be A wide variety of designs fit precisely and securely and in a pressure-tight manner in the storage housings 10 and screw connections which are to be installed at a high cost and which are additionally to be secured can be completely dispensed with.

Claims

P a t e n t a n s p r ü c h eP a t e n t a n s r u c h e
1. Verfahren zum Herstellen von Kolbenspeichern mit einem Speichergehäuse (10) und einem im Speichergehäuse (10) längsverfahrbaren Trennkolben (12), der innerhalb des Speichergehäuses (10) zwei Arbeitsräume (16,18) voneinander trennt, das endseitig von jeweils einem Deckelteil (20,22) verschlossen wird, dadurch gekennzeichnet, dass an der einen Seite (40) des Deckelteils (20,22) dieses über den freien Längsrand (32) des Speichergehäuses (10) festgelegt wird, der zu diesem Zweck eine Zustellbewegung auf das Deckelteil (20,22) erfährt.1. A method for producing piston accumulators with a accumulator housing (10) and a separating piston (12) which can be moved longitudinally in the accumulator housing (10) and which separates two working spaces (16, 18) from one another within the accumulator housing (10), each of which has a cover part ( 20, 22) is closed, characterized in that on one side (40) of the cover part (20, 22) this is fixed over the free longitudinal edge (32) of the storage housing (10), which for this purpose has an infeed movement on the cover part (20.22) experiences.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass mindestens eines der beiden Deckelteile (20,22) mit seiner der einen Seite (40) gegenüberliegenden Seite (36) gegen einen Anschlag (38) im Inneren des Speichergehäuses (10) in dieses eingesetzt wird und/oder dass das jeweilige Deckelteil (20,22) durch die Klemmkraft des zugestellten freien Längsrandes (32) in seiner Endlage gehalten wird.2. The method according to claim 1, characterized in that at least one of the two cover parts (20, 22) with its one side (40) opposite side (36) against a stop (38) in the interior of the storage housing (10) inserted into this and / or that the respective cover part (20, 22) is held in its end position by the clamping force of the supplied free longitudinal edge (32).
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass für die Zustellbewegung des Längsrandes (32) des Speichergehäuses (10) ein Umformwerkzeug (42) vorgesehen wird, das den mit mindestens einer Zustellschräge (44) versehenen Längsrand (32) auf das Deckelteil (20) derart legt, dass dieses in der Art eines Klemmsitzes im Speichergehäuse (10) festgelegt wird.3. The method according to claim 1 or 2, characterized in that for the infeed movement of the longitudinal edge (32) of the storage housing (10) a forming tool (42) is provided, which is provided with at least one infeed bevel (44) longitudinal edge (32) on the Lids part (20) so that it is fixed in the manner of a clamp fit in the storage housing (10).
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Längsrand (32) gegenüber dem sonstigen Speichergehäuse (10) in der Wandstärke reduziert wird und dass die Übergangsstelle zwi- sehen den verschiedenen Wandstärken den Anschlag (38) für das Dek- kelteil (20) innerhalb des Speichergehäuses (10) bildet.4. The method according to any one of claims 1 to 3, characterized in that the longitudinal edge (32) compared to the other storage housing (10) is reduced in wall thickness and that the transition point between see the different wall thicknesses forms the stop (38) for the cover part (20) within the storage housing (10).
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Längsrand (32) auf seiner dem jeweiligen Deckelteil (20,22) zugewandten Seite und nach außen hin mit einer Einführschräge (50) versehen wird.5. The method according to any one of claims 1 to 4, characterized in that the longitudinal edge (32) on its side facing the respective cover part (20, 22) and on the outside is provided with an insertion bevel (50).
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass an der gegenüberliegenden Seite (40) des Deckelteils (20,22) dieses mit einer Anlagefläche (46), insbesondere in Form einer Festlegeschräge, versehen wird, gegen die der Längsrand (32) sich im festgelegten Zustand abstützt und dass ansonsten das Deckelteil (20,22) nach außen hin das Speichergehäuse (10) abschließt.6. The method according to any one of claims 1 to 5, characterized in that on the opposite side (40) of the cover part (20,22) this is provided with a contact surface (46), in particular in the form of a bevel, against which the longitudinal edge (32) is supported in the fixed state and that otherwise the cover part (20, 22) closes the storage housing (10) towards the outside.
7. Verfahren nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass in einer gemeinsamen Zustellbewegung zwei Umformwerkzeuge (42) an gegenüberliegenden Seiten des Speichergehäuses (10) den Festlegevorgang für das jeweilige endseitige Deckelte.il (20,22) durch Ein- Wirkung auf den jeweils freien Längsrand (32) des Speichergehäuses (10) vornehmen.7. The method according to any one of claims 3 to 6, characterized in that in a common infeed movement two forming tools (42) on opposite sides of the storage housing (10) the fixing process for the respective end cover parts (20, 22) by action on the free longitudinal edge (32) of the storage housing (10).
8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass mittels eines Aufsetzwerkzeuges (56), das den freien Längsrand (32) des Speichergehäuses (10) umfaßt, mittels einer Zuführschräge (58) das8. The method according to any one of claims 1 to 7, characterized in that by means of a placement tool (56) which comprises the free longitudinal edge (32) of the storage housing (10), by means of a feed slope (58)
Deckelteil (20,22) in das Speichergehäuse (10) bis zum Anschlag (38) eingebracht wird. Cover part (20, 22) is inserted into the storage housing (10) up to the stop (38).
. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Längsrand (32) innenumfangsseitig mit einer nach außen hin sich erweiternden Einführschräge (50) für das Deckelteil (20,22) versehen wird., Method according to one of claims 1 to 7, characterized in that the longitudinal edge (32) is provided on the inside circumference with an outwardly widening insertion bevel (50) for the cover part (20, 22).
10. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Höhe des Deckelteils (20,22) mindestens doppelt so hoch gewählt wird, als der zur Klemmung des Deckelteils (20,22) eingesetzte freie Längsrand (38) des Speichergehäuses (10). 10. The method according to any one of claims 1 to 9, characterized in that the height of the cover part (20,22) is selected at least twice as high as the free longitudinal edge (38) of the storage housing used for clamping the cover part (20,22) (10).
EP04702305A 2003-02-01 2004-01-15 Method for the production of piston-type accumulators Expired - Lifetime EP1588056B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07007946A EP1808605B1 (en) 2003-02-01 2004-01-15 Method for manufacturing piston-type accumulators

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10303988 2003-02-01
DE10303988A DE10303988A1 (en) 2003-02-01 2003-02-01 Method of manufacturing piston accumulators
PCT/EP2004/000230 WO2004067968A1 (en) 2003-02-01 2004-01-15 Method for the production of piston-type accumulators

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP07007946A Division EP1808605B1 (en) 2003-02-01 2004-01-15 Method for manufacturing piston-type accumulators

Publications (2)

Publication Number Publication Date
EP1588056A1 true EP1588056A1 (en) 2005-10-26
EP1588056B1 EP1588056B1 (en) 2007-06-27

Family

ID=32730673

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04702305A Expired - Lifetime EP1588056B1 (en) 2003-02-01 2004-01-15 Method for the production of piston-type accumulators
EP07007946A Expired - Lifetime EP1808605B1 (en) 2003-02-01 2004-01-15 Method for manufacturing piston-type accumulators

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP07007946A Expired - Lifetime EP1808605B1 (en) 2003-02-01 2004-01-15 Method for manufacturing piston-type accumulators

Country Status (6)

Country Link
US (1) US8387253B2 (en)
EP (2) EP1588056B1 (en)
JP (1) JP2006516706A (en)
AT (2) ATE428861T1 (en)
DE (3) DE10303988A1 (en)
WO (1) WO2004067968A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004043352A1 (en) 2004-09-08 2006-03-23 Hydac Technology Gmbh hydraulic accumulator
GB2420380A (en) * 2004-11-18 2006-05-24 Parker Hannifin Plc Twin piston gas filled hydraulic actuator
DE102009021463A1 (en) * 2009-05-15 2010-11-18 Hydac Technology Gmbh hydraulic accumulator
DE102015014797A1 (en) * 2015-11-14 2017-05-18 Hydac Technology Gmbh safety device

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734531A (en) * 1956-02-14 Hydraulic accumulators
US2748801A (en) * 1953-10-22 1956-06-05 Tommy J Mccuistion Accumulators
US3408731A (en) * 1966-04-25 1968-11-05 Mercier Jean Method of retaining cover member on pressure vessel
US3541833A (en) * 1966-04-25 1970-11-24 Jean Mercier Apparatus for forming pressure vessel ends
DE2238211A1 (en) 1972-08-03 1974-02-14 Haenchen Kg Herbert PRESSURIZED CYLINDRICAL CONTAINER
DE3411592C2 (en) * 1984-03-29 1994-06-30 Hydac Technology Gmbh Hydropneumatic accumulator
US4848448A (en) * 1987-12-28 1989-07-18 Mccord Heat Transfer Corporation Heat exchange assembly
JPH03101U (en) * 1989-05-23 1991-01-07
JPH0392679A (en) 1989-09-05 1991-04-17 Showa Mfg Co Ltd Manufacture of pressure vessel
US5115663A (en) * 1989-11-25 1992-05-26 Honda Giken Kogyo Kabushiki Kaisha Method for forming a crankshaft
JP2531945Y2 (en) * 1991-02-20 1997-04-09 株式会社ショーワ Accumulator structure
US5311910A (en) * 1991-02-20 1994-05-17 Kabushiki Kaisha Showa Seisakusho Cap attachment structure for accumulator
JPH08159102A (en) * 1994-12-05 1996-06-18 Nok Corp Accumulator
JP3712321B2 (en) 1998-02-12 2005-11-02 カヤバ工業株式会社 accumulator
JP2000071134A (en) * 1998-08-27 2000-03-07 Nissan Diesel Motor Co Ltd Piston inserting device in engine assembling work
EP1128073A1 (en) * 2000-02-28 2001-08-29 Serta Method of closing the end which forms the head or rod guide of the barrel of an actuator cylinder
IT1318123B1 (en) * 2000-07-05 2003-07-23 Alfamatic S R L PNEUMATIC, HYDRAULIC AND SIMILAR CYLINDER, AND METHOD FOR CUSTOMIZATION
JP4342091B2 (en) * 2000-08-03 2009-10-14 本田技研工業株式会社 Piston insertion jig
US6460571B1 (en) * 2001-03-13 2002-10-08 Parker-Hannifin Corporation Crimped piston/membrane accumulator
DE10139192A1 (en) * 2001-08-16 2003-03-06 Hydac Technology Gmbh piston accumulators
DE10313241A1 (en) 2003-03-25 2004-10-21 Hydac Technology Gmbh piston accumulators

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004067968A1 *

Also Published As

Publication number Publication date
WO2004067968A1 (en) 2004-08-12
ATE365870T1 (en) 2007-07-15
US8387253B2 (en) 2013-03-05
EP1588056B1 (en) 2007-06-27
DE10303988A1 (en) 2004-08-19
DE502004004183D1 (en) 2007-08-09
EP1808605A1 (en) 2007-07-18
EP1808605B1 (en) 2009-04-15
US20060016074A1 (en) 2006-01-26
ATE428861T1 (en) 2009-05-15
JP2006516706A (en) 2006-07-06
DE502004009375D1 (en) 2009-05-28

Similar Documents

Publication Publication Date Title
EP2430318B1 (en) Hydraulic accumulator
EP0761967A1 (en) Hydraulic housing block with piston pump
EP0733822A1 (en) Cylinder-piston unit filled with a fluid,especially a gasspring
EP1918626B1 (en) Accumulator for damping pressure pulsations
DE102014207839A1 (en) Pressure fluid tank with shut-off device.
DE19933256A1 (en) Connection piece and housing, in particular high-pressure fuel accumulator, with prestressed welded connection piece for a fuel injection system for internal combustion engines
EP2488762B1 (en) Hydropneumatic pressure accumulator
DE102015119638A1 (en) Motor vehicle chassis
EP1606517B1 (en) Piston-type accumulator
EP1588056A1 (en) Method for the production of piston-type accumulators
EP1787029B1 (en) Hydraulic accumulator
EP0588779B1 (en) Hydraulic cylinder
DE60316268T2 (en) Method and device for loading and closing a pipe
DE10026616B4 (en) Pressure booster, in particular hydropneumatic pressure booster
DE2905742C2 (en) Rod or tappet seal
EP1496334A1 (en) Measuring point bolt
DE102018101727A1 (en) Piston-cylinder unit
DE2010339A1 (en) Hydropneumatic spring element
EP0049824A1 (en) Pressure vessel, in particular accumulator for a fluid system
WO2018014996A1 (en) Tensioning cylinder device
WO2018153685A1 (en) High-pressure fuel pump
DE3345298C2 (en)
DE19608364A1 (en) Hydropneumatic pressure reservoir for hydrostatic systems for mobile or stationary equipment
DE102022002290A1 (en) Filter element
DE102022207366A1 (en) Hydraulic unit of a power brake system with a cylinder cover

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20050329

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20070627

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 502004004183

Country of ref document: DE

Date of ref document: 20070809

Kind code of ref document: P

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070627

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070627

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070627

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071127

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070627

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071008

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070927

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070627

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070928

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070627

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070627

26N No opposition filed

Effective date: 20080328

BERE Be: lapsed

Owner name: HYDAC TECHNOLOGY G.M.B.H.

Effective date: 20080131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080131

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070627

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080115

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070627

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071228

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080115

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070627

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20190116

Year of fee payment: 16

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200116

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20221104

Year of fee payment: 20

Ref country code: FR

Payment date: 20221212

Year of fee payment: 20

Ref country code: FI

Payment date: 20221213

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20230111

Year of fee payment: 20

Ref country code: DE

Payment date: 20230131

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 502004004183

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20240114