EP1447571B1 - Cylinder with adjustable end of stroke damping - Google Patents

Cylinder with adjustable end of stroke damping Download PDF

Info

Publication number
EP1447571B1
EP1447571B1 EP20040100496 EP04100496A EP1447571B1 EP 1447571 B1 EP1447571 B1 EP 1447571B1 EP 20040100496 EP20040100496 EP 20040100496 EP 04100496 A EP04100496 A EP 04100496A EP 1447571 B1 EP1447571 B1 EP 1447571B1
Authority
EP
European Patent Office
Prior art keywords
piston
travel
damping
pneumatic cylinder
stop element
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.)
Expired - Lifetime
Application number
EP20040100496
Other languages
German (de)
French (fr)
Other versions
EP1447571A1 (en
Inventor
Ernst-August Meyer
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.)
Aventics GmbH
Original Assignee
Rexroth Mecman 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32404441&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1447571(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Rexroth Mecman GmbH filed Critical Rexroth Mecman GmbH
Publication of EP1447571A1 publication Critical patent/EP1447571A1/en
Application granted granted Critical
Publication of EP1447571B1 publication Critical patent/EP1447571B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20Other details, e.g. assembly with regulating devices
    • F15B15/22Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/223Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which completely seals the main fluid outlet as the piston approaches its end position

Definitions

  • the invention relates to an endlagengedämpften pneumatic cylinder, in whose Cylinder housing an at least one side acted upon piston axially movable is accommodated, wherein at least one of the two pressure chambers formed thereby Means is equipped for an adjustable end position damping of the piston.
  • damping is the speed of the piston shortly before reaching the end position by braked corresponding components, which usually form an additional throttle point in principle, through which the compressed air to be displaced from the pneumatic cylinder flow must, so that the desired delay arises.
  • From DE 196 45 701 A1 is another generic endlagegedämpfter Pneumatic cylinder with variable damping length out.
  • the damping is here by means of a control valve arrangement generates, through which the compressed air flowing through at least is temporarily throttled.
  • the control valve assembly has compressed air connections and Control terminals connected to an electronic control unit.
  • Throttling of the compressed air flow has the control valve arrangement in addition to a first Passage cross section still a second, smaller passage cross-section and a Change-over valve for switching between the two passage cross-sections.
  • the Switching to the smaller passage cross-section is a temporary throttling of the Compressed air supply in the pressure cylinder for cushioning causes.
  • About the electronic control unit is because of a cooperating with this permanent Position detection of the piston the onset of cushioning, that is the here Switching between the two passage cross sections, flexibly adjustable. Indeed This solution requires a fairly high amount of additional valve technology as well Control electronics.
  • the invention includes the technical teaching that as a means for an adjustable End position damping a frontally spaced on the piston via compression spring means attached, at least partially iron metallic stop element is provided, which in a piston near basic position G by the magnetic force of at least one Permanent magnet is fixed to the piston, and which in a piston remote working position A protrudes into the adjacent pressure chamber for cushioning, with an outside along the cylinder housing for determining the damping length adjustable Magnetic element for the generation of a relative to the magnetic field of the permanent magnet is provided in substantially inverted magnetic field to a change in position of the To achieve stop element from the basic position G in the working position A, when the Piston passes shortly before reaching the end position of the magnetic element.
  • the advantage of the solution according to the invention lies in the fact that with a Adjustment of the outside of the cylinder housing attached magnetic element Damping length is flexibly adaptable to every application. This adjustment takes place in easy way manually, without the need for control engineering effort is required.
  • the damping strength can also be adjusted manually via an adjustable throttle in conventional Be customized.
  • the two are the end position damping Parameter damping length and damping strength directly on the pneumatic cylinder by light understandable operating steps adjustable.
  • the inventive mechanical solution for End position damping requires only a small additional component cost, the Compactness of the pneumatic cylinder is not affected. This is how the length of the Pneumatic cylinder thereby not increased.
  • a particularly reliable holding the iron metal stop member in the piston-close basic position G results when the permanent magnet is a hollow cylinder is formed, adapted to a preferably annular formation of the stop element, wherein the pressure spring means carrying the stop element from the hollow cylindrical Permanent magnet is at least partially enclosed.
  • This relative arrangement of said components to each other also ensures their compact Housing within the limited space in the piston.
  • the compression spring means in the manner of a coil spring or in the manner of a Elastomer bellows formed, which is attached on the one hand to the piston and on the other carries the stop element. It is conceivable that the compression spring itself by his Spring effect contributes to cushioning.
  • the compression spring means only a small specific spring constant, which is such that a Axial movement of the stop element of the piston near basic position G springing in the piston-distant working position A is ensured.
  • the cushioning is preferably such that the stop element in the far away from working position A when approaching the piston to the end position from reaching one defined by the axial spacing of the stop element from the piston Damping distance X a arranged in the associated cylinder cover corresponding Closes opening, so that for the rest of the pressure chamber escaping exhaust air only the residual flow cross-section provided by a second bypass opening remains.
  • the stop element advantageously consists of different Materials, namely to the piston side facing iron and to the opposite, the cylinder cover facing side of an elastomeric material.
  • the stop element can thus be produced in a simple manner as a rubber-metal part become.
  • the preferably annular stop element corresponds to the in Cylinder cover provided opening, which, for example, as an annular gap or as an in a circular array arranged hole series can be formed.
  • this is along the cylinder housing for determining the damping length adjustable magnetic element an electric solenoid, which is opposite to that in the piston integrated permanent magnet is aligned so that when energized opposite to the magnetic field of the permanent magnet substantially inverted magnetic field results, which disturbs the magnetic field of the permanent magnet by this partially will be annulled.
  • the energization of the solenoid can via an electronic Control unit, which is an optional switching on or off the End position damping allows.
  • the control of the solenoid can together with the control of a solenoid valve acting on the solenoid valve, so that a separate control device is not required.
  • the figure shows a longitudinal section through an endlagengedämpften pneumatic cylinder with variable damping length.
  • the pneumatic cylinder consists essentially of a cylinder housing 1, in which a piston 2 is housed axially displaceable.
  • the piston 2 is provided with two annular Sealing elements 3a and 3b provided, which on the inner wall of the cylinder housing. 1 come into contact via corresponding sealing lip sections.
  • the piston 2 divides the Interior of the cylinder housing 1 in two pressure chambers 4a and 4b.
  • the pressure chambers 4a and 4b are further limited by sealingly attached to the cylinder housing 1 at the end Cylinder cover 5a and 5b.
  • a piston rod 6 runs.
  • the piston rod 6 penetrates sealed by the cylinder cover 5b.
  • For sealing the cylinder cover 5b opposite the piston rod 6 is an annular sealing element 7 in the cylinder cover 5b arranged. Axially adjacent to the sealing element 7, the cylinder cover 5b continues to have a Guide bush 8, which serves a precise axial guidance of the piston rod 6.
  • two pressure medium connections 9a and 9b are provided in the cylinder cover 5a and 5b, respectively.
  • the pressure medium connection 9a is in communication with the pressure chamber 4a, whereas the Pressure medium connection 9b for acting on the pressure chamber 4b is used.
  • annular stop elements 10a, 10b correspond to the execution of the End position damping with associated openings 12a and 12b, which here take the form of a Have annular gaps, the shape of the acting as a closure element stop element 10a or 10b is adjusted.
  • the stop element 10a, 10b to the opening 12a or 12b facing side of an elastomeric material, whereas the opposite side is made of iron.
  • An adjustable end position damping is achieved in that the stop element 10a, 10b both a piston-near basic position G and a piston-distant working position A. can take. (In the figure, both positions are shown, which are equally for both damping sides apply.)
  • the piston-near basic position G is the iron-metallic Stop element 10b by the magnetic force of a hollow cylindrical permanent magnet 15a, 15b fixed to the piston 2.
  • piston-distant working position A stands out Stop element 10a - in the manner described above - in the adjacent Pressure chamber 4a into it.
  • a magnetic element 16a, 16b manually adjustable along the cylinder housing 1 and releasably secured thereto arranged.
  • the magnetic elements 16a, 16b are designed here as electrical magnetic coils, which are powered by a - not shown - electronic control unit. When the magnetic elements 16a and 16b are energized, they develop a magnetic field which is in its polarization with respect to the magnetic field generated by the permanent magnet 15a, 15b is inverted. By this disturbing weakening of the magnetic field of the permanent magnet 15a or 15b dissolves due to the pressing force of the Druckededemlittel 11a and 11b the Stop element 10a or 10b from its magnetic force held near the piston Basic position G and gets into its working position A. Now is the stop element 10a and 10b ready to perform a damping function in the sense explained above.

Description

Die Erfindung betrifft einen endlagengedämpften Pneumatikzylinder, in dessen Zylindergehäuse ein zumindest einseitig beaufschlagbarer Kolben axial bewegbar untergebracht ist, wobei mindestens eine der beiden hierdurch gebildeten Druckkammern mit Mitteln für eine verstellbare Endlagendämpfung des Kolbens ausgestattet ist. The invention relates to an endlagengedämpften pneumatic cylinder, in whose Cylinder housing an at least one side acted upon piston axially movable is accommodated, wherein at least one of the two pressure chambers formed thereby Means is equipped for an adjustable end position damping of the piston.

Um ein abruptes Auftreffen des Kolbens auf den Zylinderdeckel in der Endlage zu vermeiden, erfordern bestimmte Einsatzfälle eine Endlagendämpfung. Bei der Endlagendämpfung wird die Geschwindigkeit des Kolbens kurz vor Erreichen der Endlagenposition durch entsprechende Bauteile abgebremst, die meist im Prinzip eine zusätzliche Drosselstelle bilden, durch welche die aus dem Pneumatikzylinder zu verdrängende Druckluft hindurchfließen muss, so dass die gewünschte Verzögerung entsteht.In order to avoid an abrupt impact of the piston on the cylinder cover in the end position, certain applications require cushioning. At the end position damping is the speed of the piston shortly before reaching the end position by braked corresponding components, which usually form an additional throttle point in principle, through which the compressed air to be displaced from the pneumatic cylinder flow must, so that the desired delay arises.

Allgemein bekannt sind endlagengedämpfte Pneumatikzylinder mit konstanter Dämpfungslänge sowie auch mit variabler Dämpfungslänge. Bei einem Pneumatikzylinder mit konstanter Dämpfungslänge lässt sich diese nicht ändern, also den Einsatzbedingungen anpassen. Dagegen ist die Dämpfungslänge bei Pneumatikzylindern mit variabler Dämpfungslänge änderbar, um je nach Einsatzfall eine Verstellung der Endlagendämpfung des Kolbens zu ermöglichen.Generally known are endlagengedämpfte pneumatic cylinders with constant Damping length as well as with variable damping length. In a pneumatic cylinder With a constant damping length, this can not be changed, ie the conditions of use to adjust. In contrast, the damping length is variable with pneumatic cylinders Damping length changeable, depending on the application, an adjustment of the end position damping to allow the piston.

Aus der DE 44 10 103 C1 geht ein solcher gattungsgemäßer endlagengedämpfter Pneumatikzylinder mit variabler Dämpfungslänge hervor. Um ein besonders sanftes Anfahren der Endlage des Pneumatikzylinders zu erzielen, wird vorgeschlagen, dass eine elektronische Steuereinheit in Form eines Gegenpulsmoduls über zugeordnete diskrete Vorpositioniersensoren eine zeitlich einstellbare Umsteuerung eines bestromten ersten, einer ersten Endlage zugeordneten Steuerventils auf ein bisher nicht bestromtes zweites, einer zweiten Endlage zugeordneten Steuerventils bewirkt. Um das Dämpfungsverhalten der Antriebsanordnung zu variieren, kann hier das Umsteuern zeitverzögert vorgenommen werden. Weiterhin kann die Gegenimpuls-Dauer variiert werden, was ein praktisch kraftloses Annähern an die Endlagenposition mit niederer Geschwindigkeit ermöglicht. Diese Maßnahmen beeinflussen die wirksame Dämpfungslänge, welche insoweit flexibel über die elektronische Steuereinheit variierbar ist. Aufgrund der an definierten Stellen entlang der Hubrichtung des Kolbens angebrachten diskreten Vorpositioniersensoren sind die Einstellmöglichkeiten hinsichtlich der Endlagenparameter jedoch begrenzt. So ist insbesondere der Einsatzzeitpunkt der Dämpfung sowie die Dämpfungsstärke nicht exakt bzw. nicht ohne größeren steuertechnischen Aufwand an verschiedene Einsatzfälle anpassbar.From DE 44 10 103 C1 is such a generic endlagengedämpfter Pneumatic cylinder with variable damping length out. For a particularly gentle start the end position of the pneumatic cylinder, it is proposed that an electronic Control unit in the form of a counter-pulse module via assigned discrete Vorpositioniersensoren a time-adjustable reversal of an energized first, a first end position associated control valve to a previously unenergized second, one second end position associated control valve causes. To the damping behavior of To vary the drive arrangement, the reversing can be made delayed here become. Furthermore, the counter pulse duration can be varied, which is a virtually powerless Allows close to the end position at low speed. These Measures influence the effective damping length, which is flexible on the extent Electronic control unit is variable. Because of the defined places along the Lifting direction of the piston mounted discrete Vorpositioniersensoren are the However, setting options with regard to the end position parameters are limited. So is in particular, the time of use of the damping and the damping strength not exactly or not adaptable without great tax technical effort to different applications.

Aus der DE 196 45 701 A1 geht ein weiterer gattungsgemäßer endlagengedämpfter Pneumatikzylinder mit variierbarer Dämpfungslänge hervor. Die Dämpfung wird hier mittels einer Steuerventilanordnung erzeugt, durch welche die durchströmende Druckluft wenigstens zeitweise gedrosselt wird. Die Steuerventilanordnung weist Druckluftanschlüsse und Steueranschlüsse auf, die mit einer elektronischen Steuereinheit verbunden sind. Zur Drosselung des Druckluftstroms besitzt die Steuerventilanordnung neben einem ersten Durchlassquerschnitt noch einen zweiten, kleineren Durchlassquerschnitt sowie ein Umschaltventil zur Umschaltung zwischen den beiden Durchlassquerschnitten. Durch das Umschalten auf den kleineren Durchlassquerschnitt wird eine zeitweise Drosselung der Druckluftzufuhr in dem Druckmittelzylinder zur Endlagendämpfung bewirkt. Über die elektronische Steuereinheit ist wegen einer mit dieser zusammenwirkenden permanenten Wegerfassung des Kolbens das Einsetzen der Endlagendämpfung, das heißt hier das Umschalten zwischen den beiden Durchlassquerschnitten, flexibel einstellbar. Allerdings erfordert diese Lösung einen recht hohen Aufwand an zusätzlicher Ventiltechnik sowie Steuerelektronik.From DE 196 45 701 A1 is another generic endlagegedämpfter Pneumatic cylinder with variable damping length out. The damping is here by means of a control valve arrangement generates, through which the compressed air flowing through at least is temporarily throttled. The control valve assembly has compressed air connections and Control terminals connected to an electronic control unit. to Throttling of the compressed air flow has the control valve arrangement in addition to a first Passage cross section still a second, smaller passage cross-section and a Change-over valve for switching between the two passage cross-sections. By the Switching to the smaller passage cross-section is a temporary throttling of the Compressed air supply in the pressure cylinder for cushioning causes. About the electronic control unit is because of a cooperating with this permanent Position detection of the piston the onset of cushioning, that is the here Switching between the two passage cross sections, flexibly adjustable. Indeed This solution requires a fairly high amount of additional valve technology as well Control electronics.

Es ist daher die Aufgabe der vorliegenden Erfindung einen endlagengedämpften Pneumatikzylinder mit variierbarer Dämpfungslänge zu schaffen, welcher sich mit einfachen technischen Mitteln auf unterschiedliche Dämpfungslängen einstellen lässt.It is therefore the object of the present invention an endlagengedämpften To provide pneumatic cylinder with variable damping length, which is easy with technical means can be set to different damping lengths.

Die Aufgabe wird ausgehend von einem endlagengedämpften Pneumatikzylinder gemäß dem Oberbegriff des Anspruchs 1 in Verbindung mit dessen kennzeichnenden Merkmalen gelöst. Die nachfolgenden abhängigen Ansprüche geben vorteilhafte Weiterbildungen der Erfindung wieder. The task is based on a endlagengedämpften pneumatic cylinder according to the Preamble of claim 1 solved in conjunction with its characterizing features. The following dependent claims give advantageous developments of the invention again.

Die Erfindung schließt die technische Lehre ein, dass als Mittel für eine verstellbare Endlagendämpfung ein stirnseitig am Kolben über Druckfedermittel beabstandet angebrachtes, zumindest bereichsweise eisenmetallisches Anschlagelement vorgesehen ist, welches in einer kolbennahen Grundposition G durch die Magnetkraft mindestens eines Permanentmagneten am Kolben fixiert ist, und welches in einer kolbenfernen Arbeitsposition A zur Endlagendämpfung in die benachbarte Druckkammer hineinragt, wobei ein außen entlang des Zylindergehäuses zur Bestimmung der Dämpfungslänge verstellbares Magnetelement für die Erzeugung eines gegenüber dem Magnetfeld des Permanentmagneten im wesentlichen invertierten Magnetfelds vorgesehen ist, um eine Positionsänderung des Anschlagelements aus der Grundposition G in die Arbeitsposition A zu erzielen, wenn der Kolben kurz vor Erreichen der Endlage das Magnetelement passiert.The invention includes the technical teaching that as a means for an adjustable End position damping a frontally spaced on the piston via compression spring means attached, at least partially iron metallic stop element is provided, which in a piston near basic position G by the magnetic force of at least one Permanent magnet is fixed to the piston, and which in a piston remote working position A protrudes into the adjacent pressure chamber for cushioning, with an outside along the cylinder housing for determining the damping length adjustable Magnetic element for the generation of a relative to the magnetic field of the permanent magnet is provided in substantially inverted magnetic field to a change in position of the To achieve stop element from the basic position G in the working position A, when the Piston passes shortly before reaching the end position of the magnetic element.

Der Vorteil der erfindungsgemäßen Lösung liegt insbesondere darin, dass mit einer Verstellung des außen am Zylindergehäuse angebrachten Magnetelements die Dämpfungslänge flexibel an jeden Einsatzfall anpassbar ist. Diese Anpassung erfolgt in einfacher Weise manuell, ohne dass hierfür steuerungstechnischer Aufwand erforderlich ist. Die Dämpfungsstärke kann ebenfalls manuell über eine einstellbare Drossel in herkömmlicher Weise angepasst werden. Somit sind die beiden, die Endlagendämpfung bestimmenden Parameter Dämpfungslänge und Dämpfungsstärke direkt am Pneumatikzylinder durch leicht verständliche Bedienschritte einstellbar. Die erfindungsgemäße mechanische Lösung zur Endlagendämpfung erfordert nur einen geringen zusätzlichen Bauteileaufwand, der die Kompaktheit des Pneumatikzylinders nicht beeinflusst. So wird vor allem die Länge des Pneumatikzylinders hierdurch nicht vergrößert.The advantage of the solution according to the invention lies in the fact that with a Adjustment of the outside of the cylinder housing attached magnetic element Damping length is flexibly adaptable to every application. This adjustment takes place in easy way manually, without the need for control engineering effort is required. The damping strength can also be adjusted manually via an adjustable throttle in conventional Be customized. Thus, the two are the end position damping Parameter damping length and damping strength directly on the pneumatic cylinder by light understandable operating steps adjustable. The inventive mechanical solution for End position damping requires only a small additional component cost, the Compactness of the pneumatic cylinder is not affected. This is how the length of the Pneumatic cylinder thereby not increased.

Ein besonders zuverlässiges Festhalten des eisenmetallischen Anschlagselements in der kolbennahen Grundposition G ergibt sich, wenn der Permanentmagnet hohlzylinderförmig ausgebildet ist, angepasst an eine vorzugsweise ringartige Ausbildung des Anschlagelements, wobei das das Anschlagelement tragende Druckfedermittel vom hohlzylinderförmigen Permanentmagnet zumindest teilweise umschlossen ist. Diese relative Anordnung der besagten Bauteile zueinander gewährleistet darüber hinaus auch deren kompakte Unterbringung innerhalb des begrenzten Bauraums im Kolben.A particularly reliable holding the iron metal stop member in the piston-close basic position G results when the permanent magnet is a hollow cylinder is formed, adapted to a preferably annular formation of the stop element, wherein the pressure spring means carrying the stop element from the hollow cylindrical Permanent magnet is at least partially enclosed. This relative arrangement of said components to each other also ensures their compact Housing within the limited space in the piston.

Vorzugsweise ist das Druckfedermittel nach Art einer Spiraldruckfeder oder nach Art eines Elastomerfaltenbalges ausgebildet, welches einerseits am Kolben befestigt ist und andererseits das Anschlagelement trägt. Es ist dass denkbar, dass das Druckfedermittel selbst durch seine Federwirkung zur Endlagendämpfung beiträgt. Vorzugsweise besitzt das Druckfedermittel jedoch nur eine geringe spezifische Federkonstante, die so bemessen ist, dass eine Axialbewegung des Anschlagelements von der kolbennahen Grundposition G ausfedernd in die kolbenferne Arbeitsposition A sichergestellt ist.Preferably, the compression spring means in the manner of a coil spring or in the manner of a Elastomer bellows formed, which is attached on the one hand to the piston and on the other carries the stop element. It is conceivable that the compression spring itself by his Spring effect contributes to cushioning. Preferably, the compression spring means However, only a small specific spring constant, which is such that a Axial movement of the stop element of the piston near basic position G springing in the piston-distant working position A is ensured.

Die Endlagendämpfung erfolgt vorzugsweise derart, dass das Anschlagelement in der kolbenfernen Arbeitsposition A bei Annäherung des Kolbens an die Endlage ab Erreichen eines durch die axiale Beabstandung des Anschlagelements vom Kolben definierten Dämpfungsabstandes X eine im zugeordneten Zylinderdeckel angeordnete korrespondierende Öffnung verschließt, so dass für die restliche aus der Druckkammer entweichende Abluft nur der durch eine zweite Bypassöffnung zur Verfügung gestellte Restströmungsquerschnitt verbleibt.The cushioning is preferably such that the stop element in the far away from working position A when approaching the piston to the end position from reaching one defined by the axial spacing of the stop element from the piston Damping distance X a arranged in the associated cylinder cover corresponding Closes opening, so that for the rest of the pressure chamber escaping exhaust air only the residual flow cross-section provided by a second bypass opening remains.

Zu diesem Zwecke besteht das Anschlagelement vorteilhafter Weise aus unterschiedlichen Materialien, nämlich zu der dem Kolben zugewandten Seite aus Eisen und zu der gegenüberliegenden, dem Zylinderdeckel zugewandten Seite aus einem Elastomermaterial. Das Anschlagelement kann somit in einfacher Weise als Gummi-Metallteil hergestellt werden. For this purpose, the stop element advantageously consists of different Materials, namely to the piston side facing iron and to the opposite, the cylinder cover facing side of an elastomeric material. The stop element can thus be produced in a simple manner as a rubber-metal part become.

Das vorzugsweise ringförmig ausgebildete Anschlagelement korrespondiert mit der im Zylinderdeckel vorgesehenen Öffnung, welche beispielsweise als Ringspalt oder als eine in einer Kreisform angeordnete Bohrungsreihe ausgebildet werden kann.The preferably annular stop element corresponds to the in Cylinder cover provided opening, which, for example, as an annular gap or as an in a circular array arranged hole series can be formed.

Vorzugsweise ist das entlang des Zylindergehäuses zur Bestimmung der Dämpfungslänge verstellbare Magnetelement eine elektrische Magnetspule, die gegenüber dem im Kolben integrierten Permanentmagneten so ausgerichtet ist, dass sich bei deren Bestromung ein gegenüber dem Magnetfeld des Permanentmagneten im wesentlichen invertiertes Magnetfeld ergibt, welches das Magnetfeld des Permanentmagneten stört, indem dieses teilweise aufgehoben wird. Die Bestromung der Magnetspule kann über eine elektronische Steuereinheit erfolgen, was ein wahlweise Zuschalten oder Abschalten der Endlagendämpfung ermöglicht. Die Ansteuerung der Magnetspule kann dabei gemeinsam mit der Ansteuerung eines den Pneumatikzylinder beaufschlagenden Magnetventils erfolgen, so dass eine separate Steuereinrichtung nicht erforderlich ist. Daneben ist es auch denkbar, das außen am Zylindergehäuse angebrachte, längsverstellbare Magnetelement als einen Permanentmagneten auszugestalten, dessen Positionierung ebenfalls ein entsprechend invertiertes Magnetfeld liefert. Hierbei ist aber zu beachten, dass der Permanentmagnet die Dämpfungseinrichtung nicht auch beim Rückhub des Kolbens auslöst. Zu diesem Zwecke sind geeignete technische Mittel zum Zuführen und Abführen des Permanentmagneten oder dergleichen vorzusehen.Preferably, this is along the cylinder housing for determining the damping length adjustable magnetic element an electric solenoid, which is opposite to that in the piston integrated permanent magnet is aligned so that when energized opposite to the magnetic field of the permanent magnet substantially inverted magnetic field results, which disturbs the magnetic field of the permanent magnet by this partially will be annulled. The energization of the solenoid can via an electronic Control unit, which is an optional switching on or off the End position damping allows. The control of the solenoid can together with the control of a solenoid valve acting on the solenoid valve, so that a separate control device is not required. In addition, it is also conceivable that externally mounted on the cylinder housing, longitudinally adjustable magnetic element as a Permanent magnets to design, whose positioning is also a corresponding inverted magnetic field provides. However, it should be noted that the permanent magnet the Damping device does not trigger during the return stroke of the piston. For this purpose are suitable technical means for supplying and discharging the permanent magnet or to provide the like.

Weitere die Erfindung verbessernde Maßnahmen sind in den abhängigen Ansprüchen angegeben oder werden nachstehend gemeinsam mit der Beschreibung eines bevorzugten Ausführungsbeispiels der Erfindung anhand der einzigen Figur näher dargestellt.Further measures improving the invention are set forth in the dependent claims or together with the description of a preferred Embodiment of the invention with reference to the single figure shown in more detail.

Die Figur zeigt einen Längsschnitt durch einen endlagengedämpften Pneumatikzylinder mit variierbarer Dämpfungslänge. The figure shows a longitudinal section through an endlagengedämpften pneumatic cylinder with variable damping length.

Der Pneumatikzylinder besteht im Wesentlichen aus einem Zylindergehäuse 1, in welchem ein Kolben 2 axial verschiebbar untergebracht ist. Der Kolben 2 ist mit zwei ringförmigen Dichtelementen 3a und 3b versehen, welche an der Innenwandung des Zylindergehäuses 1 über entsprechende Dichtlippenabschnitte zur Anlage kommen. Der Kolben 2 unterteilt den Innenraum des Zylindergehäuses 1 in zwei Druckkammern 4a und 4b. Die Druckkammern 4a und 4b sind weiterhin begrenzt durch endseitig am Zylindergehäuse 1 dichtend befestigte Zylinderdeckel 5a und 5b. Vom Kolben 2 aus verläuft eine Kolbenstange 6. Die Kolbenstange 6 durchdringt abgedichtet den Zylinderdeckel 5b. Zur Abdichtung des Zylinderdeckels 5b gegenüber der Kolbenstange 6 ist ein ringförmiges Dichtelement 7 im Zylinderdeckel 5b angeordnet. Axial benachbart zum Dichtelement 7 weist der Zylinderdeckel 5b weiterhin eine Führungsbuchse 8 auf, welche einer exakten axialen Führung der Kolbenstange 6 dient.The pneumatic cylinder consists essentially of a cylinder housing 1, in which a piston 2 is housed axially displaceable. The piston 2 is provided with two annular Sealing elements 3a and 3b provided, which on the inner wall of the cylinder housing. 1 come into contact via corresponding sealing lip sections. The piston 2 divides the Interior of the cylinder housing 1 in two pressure chambers 4a and 4b. The pressure chambers 4a and 4b are further limited by sealingly attached to the cylinder housing 1 at the end Cylinder cover 5a and 5b. From the piston 2, a piston rod 6 runs. The piston rod 6 penetrates sealed by the cylinder cover 5b. For sealing the cylinder cover 5b opposite the piston rod 6 is an annular sealing element 7 in the cylinder cover 5b arranged. Axially adjacent to the sealing element 7, the cylinder cover 5b continues to have a Guide bush 8, which serves a precise axial guidance of the piston rod 6.

Zur Druckmittelbeaufschlagung des hier dargestellten doppeltwirkenden Pneumatikzylinders sind zwei Druckmittelanschlüsse 9a und 9b in den Zylinderdeckel 5a bzw. 5b vorgesehen. Der Druckmittelanschluss 9a steht mit der Druckkammer 4a in Verbindung, wogegen der Druckmittelanschluss 9b zur Beaufschlagung der Druckkammer 4b dient.For pressurizing the double-acting pneumatic cylinder shown here two pressure medium connections 9a and 9b are provided in the cylinder cover 5a and 5b, respectively. The pressure medium connection 9a is in communication with the pressure chamber 4a, whereas the Pressure medium connection 9b for acting on the pressure chamber 4b is used.

Zur beidseitigen Endlagendämpfung des Kolbens 2 sind hieran jeweils beidscitig axial beabstandet angebrachte ringförmige Anschlagelemente 10a und 10b vorgesehen. Die axial beabstandete Anbringung der Anschlagelemente 10a und 10b am Kolben 2 erfolgt über ein Druckfedermittel 11a bzw. 1 1b, welche im Zusammenhang mit der vorliegenden Erfindung die Hauptfunktionen erfüllen, die Anschlagelemente 10a und 10b im entlasteten Zustand axial beabstandet vom Kolben 2 und leicht verschiebbar zu halten. Insoweit weisen die hier nach Art einer Spiraldruckfeder aus Federstahl bestehenden Druckfedermittel 11a und 11b eine nur geringe Federkonstante auf. Die koaxial gegenüber dem Kolben 2 derart angebrachten ringförmigen Anschlagelemente 10a, 10b korrespondieren zur Ausführung der Endlagendämpfung mit zugeordneten Öffnungen 12a und 12b, welche hier die Form eines Ringspalts besitzen, der an die Form des als Verschlusselement wirkenden Anschlagelements 10a bzw. 10b angepasst ist. Zur Verbesserung der Dichtwirkung besteht das Anschlagelement 10a, 10b zu der der Öffnung 12a bzw. 12b zugewandten Seite aus einem Elastomermaterial, wogegen die gegenüberliegende Seite aus Eisen besteht.For two-sided end position damping of the piston 2 are hereby beidscitig axially spaced attached annular stop elements 10a and 10b provided. The axial spaced attachment of the stop elements 10a and 10b on the piston 2 via a Compression spring means 11a and 1b, respectively, used in connection with the present invention fulfill the main functions, the stop elements 10 a and 10 b in the unloaded state axially spaced from the piston 2 and easy to hold. In that regard, the here after Type of coil spring made of spring steel existing compression spring means 11a and 11b a only low spring constant. The coaxial relative to the piston 2 so attached annular stop elements 10a, 10b correspond to the execution of the End position damping with associated openings 12a and 12b, which here take the form of a Have annular gaps, the shape of the acting as a closure element stop element 10a or 10b is adjusted. To improve the sealing effect is the stop element 10a, 10b to the opening 12a or 12b facing side of an elastomeric material, whereas the opposite side is made of iron.

Bei Bewegung des Kolbens 2 in eine Endlage wird nun ab Erreichen eines durch die axiale Beabstandung des Anschlagelements 10a vom Kolben 2 definierten Dämpfungsabstandes X die im zugeordneten Zylinderdeckel 5a angeordnete Öffnung 12a verschlossen. Die Öffnung 12a steht mit dem Anschluss 9a in Verbindung. Eine Bypassöffnung 13a und 13b liegt außerhalb der Reichweite des Anschlagelements 10a bzw. 10b. Diese Anordnung bewirkt, dass bei Verschluss der Öffnung 12a oder 12b zur Endlagendämpfung das restliche, aus der Druckkammer 4a bzw. 4b entweichende Druckmittel nur durch die jeweilige Bypassöffnung 13a oder 13b entweichen kann.When moving the piston 2 in an end position is now from reaching one through the axial Spacing of the stop element 10a defined by the piston 2 damping distance X. the arranged in the associated cylinder cover 5a opening 12a closed. The opening 12a is connected to the terminal 9a. A bypass opening 13a and 13b is located out of the reach of the stop element 10a or 10b. This arrangement causes that when closing the opening 12a or 12b for cushioning the remaining, from the Pressure chamber 4a and 4b escaping pressure fluid only through the respective bypass opening 13a or 13b can escape.

Im Prinzip wird hier zur Endlagendämpfung ab Erreichen des Dämpfungsabstands X der Strömungsquerschnitt für das Entweichen der Druckmittel entsprechend vermindert. Zur mangelnden Einstellung des Dämpfungsgrades ist weiterhin jeweils eine Drosselschraube 14a und 14b vorgesehen, welche mit der Bypassöffnung 13a bzw. 13b zusammenwirkt.In principle, here is the end position damping from reaching the attenuation distance X of the Flow cross-section for the escape of the pressure medium correspondingly reduced. to Lack of adjustment of the degree of damping is still a throttle screw 14a and 14b, which cooperates with the bypass opening 13a and 13b, respectively.

Eine verstellbare Endlagendämpfung wird dadurch erreicht, dass das Anschlagelement 10a, 10b sowohl eine kolbennahe Grundposition G als auch eine kolbenferne Arbeitsposition A einnehmen kann. (In der Figur sind beide Positionen dargestellt, welche gleichermaßen für beide Dämpfungsseiten gelten.) In der kolbennahen Grundposition G ist das eisenmetallische Anschlagelement 10b durch die Magnetkraft eines hohlzylinderförmigen Permanentmagneten 15a, 15b am Kolben 2 fixiert. In der anderen, kolbenfernen Arbeitsposition A ragt das Anschlagelement 10a - in vorstehend beschriebener Weise - in die benachbarte Druckkammer 4a hinein. Außen am Zylindergehäuse 1 ist jeweils ein Magnetelement 16a, 16b manuell entlang des Zylindergehäuses 1 verstellbar und hieran lösbar befestigt angeordnet. Die Magnetelemente 16a, 16b sind hier als elektrische Magnetspulen ausgeführt, welche über eine - nicht weiter dargestellte - elektronische Steuereinheit bestrombar sind. Bei Bestromen der Magnetelemente 16a bzw. 16b entfalten diese ein Magnetfeld, welches in seiner Polarisierung gegenüber dem vom Permanentmagneten 15a, 15b erzeugten Magnetfeld invertiert ist. Durch diese störende Schwächung des Magnetfelds des Permanentmagneten 15a bzw. 15b löst sich infolge der Druckkraft der Druckfedemlittel 11a bzw. 11b das Anschlagelement 10a bzw. 10b aus seiner über magnetische Kraft gehaltenen kolbennahen Grundposition G und gelangt in seine Arbeitsposition A. Nunmehr ist das Anschlagelement 10a bzw. 10b bereit, eine Dämpfungsfunktion im vorstehend erläuterten Sinne auszuführen. Über die Positionierung der Magnetelemente 16a bzw. 16b außen am Zylindergehäuse 1 kann dieses auslösende Moment bestimmt werden, so dass hierüber die Dämpfungslänge variierbar ist. Bei Erreichen der Endlagenposition des Kolbens 2 wird unter Zusammendrücken des zugeordneten Druckfedermittels 11a bzw. 11b das Anschlagelement 10a bzw. 10b wieder in die Grundposition G gedrückt, wo dieses aufgrund der vom Permanentmagneten 15a bzw. 15b ausgeübten Magnetkraft wieder fixiert ist. An adjustable end position damping is achieved in that the stop element 10a, 10b both a piston-near basic position G and a piston-distant working position A. can take. (In the figure, both positions are shown, which are equally for both damping sides apply.) In the piston-near basic position G is the iron-metallic Stop element 10b by the magnetic force of a hollow cylindrical permanent magnet 15a, 15b fixed to the piston 2. In the other, piston-distant working position A stands out Stop element 10a - in the manner described above - in the adjacent Pressure chamber 4a into it. Outside on the cylinder housing 1 is in each case a magnetic element 16a, 16b manually adjustable along the cylinder housing 1 and releasably secured thereto arranged. The magnetic elements 16a, 16b are designed here as electrical magnetic coils, which are powered by a - not shown - electronic control unit. When the magnetic elements 16a and 16b are energized, they develop a magnetic field which is in its polarization with respect to the magnetic field generated by the permanent magnet 15a, 15b is inverted. By this disturbing weakening of the magnetic field of the permanent magnet 15a or 15b dissolves due to the pressing force of the Druckededemlittel 11a and 11b the Stop element 10a or 10b from its magnetic force held near the piston Basic position G and gets into its working position A. Now is the stop element 10a and 10b ready to perform a damping function in the sense explained above. About the positioning of the magnetic elements 16a and 16b outside of the cylinder housing 1 can This triggering moment can be determined so that the damping length can be varied is. Upon reaching the end position of the piston 2 is under compression of the associated pressure spring means 11a and 11b, the stop member 10a and 10b back in pressed the base position G, where this is due to the permanent magnet 15 a or 15b applied magnetic force is fixed again.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Zylindergehäusecylinder housing
22
Kolbenpiston
33
Dichtelementsealing element
44
Druckkammerpressure chamber
55
Zylinderdeckelcylinder cover
66
Kolbenstangepiston rod
77
Dichtelementsealing element
88th
Führungsbuchseguide bush
99
Anschlussconnection
1010
Anschlagelementstop element
1111
DruckfedermittelSpring means
1212
Öffnungopening
1313
Bypassöffnungbypass opening
1414
Drosselschraubethrottle screw
1515
Permanentmagnetpermanent magnet
1616
Magnetelementmagnetic element
AA
Arbeitspositionworking position
GG
Grundpositionbasic position
XX
Dämpfungsabstanddamping distance

Claims (10)

  1. An end-of-travel damped pneumatic cylinder having, accommodated in its cylinder housing (1), a piston (2) to which a force is applicable at least unilaterally and which is moveable in an axial direction, wherein at least one of the pressure chambers (4a, 4b) thus created is equipped with means for an adjustable end-of-travel damping of said piston (2),
    characterised in that, as a means for an adjustable end-of-travel damping, a stop element (10a, 10b), at least partially ferrous-metallic, is mounted on the end face of said piston (2) and spaced by means of a pressure spring means (11a, 11b) and which, in a basic position G near said piston, is fixed on said piston (2) by the magnetic force of at least one permanent magnet (15a, 15b) and which in a working position A at a distance from said piston, protrudes into the adjacent pressure chamber (4a, 4b) for end-of-travel damping purposes, wherein a magnetic element (16a, 16b), which is adjustable along the outside of said cylinder housing (1) in order to determine the damping distance, is provided for generating a magnetic field which is essentially inverted with respect to the magnetic field of said permanent magnet (15a, 15b) in order to achieve a position change of said stop element (10a, 10b) from said basic position G to said working position A, when the piston passes the magnetic element (16a, 16b) shortly before it reaches the end-of-travel position.
  2. The end-of-travel damped pneumatic cylinder according to claim 1,
    characterised in that said permanent magnet (15a, 15b) is formed as a hollow cylinder and is inserted at the end face of said piston (2) at least partially enclosing said pressure spring means (11a, 11b).
  3. The end-of-travel damped pneumatic cylinder according to claim 1 or 2,
    characterised in that said pressure spring means (11a, 11b) is formed as a spiral pressure spring or as an elastomeric bellows and which, at one end, is attached to the piston (2) and, at the other end, carries the stop element (10, 10b).
  4. The end-of-travel damped pneumatic cylinder according to any one of the preceding claims,
    characterised in that the stop element (10a, 10b), when it is in the working position A at a distance from the piston and when the piston (2) is nearing the end-of-travel position, from a point onwards where a damping distance X defined by the axial distance between the stop element (10a, 10b) and the piston (2) is reached, closes a corresponding opening (12a, 12b) arranged in the associated cylinder cover (5a or 5b respectively), so that the remainder of the exhaust air is vented from said pressure chamber (4a or 4b, respectively) only through the residual flow cross-section provided by a second bypass opening (13a, 13b).
  5. The end-of-travel damped pneumatic cylinder according to any one of the preceding claims,
    characterised in that said stop element (10a, 10b) is made of iron on the side facing the piston (2) and is made of an elastomeric material on the opposite side facing the cylinder cover (5a, 5b).
  6. The end-of-travel damped pneumatic cylinder according to any one of the preceding claims,
    characterised in that the opening (12a, 12b) corresponding to the annular stop element (10a, 10b) is formed as an annular slot or a series of bores positioned in a circle.
  7. The end-of-travel damped pneumatic cylinder according to claim 1,
    characterised in that said magnetic element (16a, 16b) adjustable along the cylinder housing (1) for determining the damping distance is a permanent magnet.
  8. The end-of-travel damped pneumatic cylinder according to claim 1,
    characterised in that said magnetic element (16a, 16b) adjustable along the cylinder housing (1) for determining the damping distance is a magnet coil.
  9. The end-of-travel damped pneumatic cylinder according to any one of the preceding claims,
    characterised in that a piston rod (6) extends from at least one of the end faces of said piston (2) and passes through an associated cylinder cover (5b) in a sealed way, or in that said piston cooperates with means for forming a piston-rod-less cylinder.
  10. The end-of-travel damped pneumatic cylinder according to any one of the preceding claims,
    characterised in that pressurized air can be applied to the force-generating pressure chamber (4a, 4b) via an external connection (9a, 9b) or in that it contains a spring element to generate the force.
EP20040100496 2003-02-12 2004-02-10 Cylinder with adjustable end of stroke damping Expired - Lifetime EP1447571B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10305954 2003-02-12
DE2003105954 DE10305954B3 (en) 2003-02-12 2003-02-12 End of stroke damping system for pneumatic cylinder uses coil springs on either side of piston, together with permanent magnets passing near electromagnets fastened to outside of cylinder

Publications (2)

Publication Number Publication Date
EP1447571A1 EP1447571A1 (en) 2004-08-18
EP1447571B1 true EP1447571B1 (en) 2005-09-07

Family

ID=32404441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040100496 Expired - Lifetime EP1447571B1 (en) 2003-02-12 2004-02-10 Cylinder with adjustable end of stroke damping

Country Status (2)

Country Link
EP (1) EP1447571B1 (en)
DE (2) DE10305954B3 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1918592A1 (en) * 2006-11-03 2008-05-07 Carl Freudenberg KG Sealing ring with integrated cushioning means, end cap with sealing ring and pneumatic cylinder with end cap and sealing means
EP2107256A1 (en) 2008-03-31 2009-10-07 Carl Freudenberg KG Pneumatic cylinder with cushioned end stroke
EP2107255A1 (en) 2008-03-31 2009-10-07 Carl Freudenberg KG Pneumatic cylinder with cushioned end stroke
DE102017117000A1 (en) * 2017-07-27 2019-01-31 Schunk Gmbh & Co. Kg Spann- Und Greiftechnik Method for controlling an actuator and actuator

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1729015A1 (en) 2005-06-03 2006-12-06 FESTO AG & Co Fluid acted device
CN101504019B (en) * 2008-12-17 2012-05-02 国营第三八八厂 Permanent magnet buffering hydraulic cylinder
DE102009034790B4 (en) * 2009-07-25 2024-02-01 Aventics Gmbh Cylinder with end position cushioning
DE102010015081A1 (en) 2010-04-15 2011-10-20 Robert Bosch Gmbh Endlagengedämpfter pressure cylinder
CN105422542B (en) * 2015-12-22 2017-07-28 扬州捷迈锻压机械有限公司 A kind of double-deck material returned cylinder
CN109530652A (en) * 2018-11-08 2019-03-29 贵州华昌汽车电器有限公司 A kind of plug-in type stainless steel sensor oil cylinder of die casting

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06100208B2 (en) * 1987-05-29 1994-12-12 シ−ケ−デイ株式会社 Fluid pressure cylinder
DE4322255C2 (en) * 1993-07-05 1996-02-01 Festo Kg Damping device
DE4410103C1 (en) * 1994-03-21 1995-08-31 Mannesmann Ag Drive of the fluidic or electrical type with a control
DE19645701A1 (en) * 1996-11-06 1998-05-07 Wabco Gmbh Valve device for a door system which can be actuated by a pressure medium
DE29706364U1 (en) * 1997-04-10 1997-06-19 Buemach Engineering Internatio End position damped working cylinder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1918592A1 (en) * 2006-11-03 2008-05-07 Carl Freudenberg KG Sealing ring with integrated cushioning means, end cap with sealing ring and pneumatic cylinder with end cap and sealing means
EP2107256A1 (en) 2008-03-31 2009-10-07 Carl Freudenberg KG Pneumatic cylinder with cushioned end stroke
EP2107255A1 (en) 2008-03-31 2009-10-07 Carl Freudenberg KG Pneumatic cylinder with cushioned end stroke
DE102017117000A1 (en) * 2017-07-27 2019-01-31 Schunk Gmbh & Co. Kg Spann- Und Greiftechnik Method for controlling an actuator and actuator

Also Published As

Publication number Publication date
DE502004000056D1 (en) 2005-10-13
DE10305954B3 (en) 2004-07-01
EP1447571A1 (en) 2004-08-18

Similar Documents

Publication Publication Date Title
EP0400395B1 (en) Shock absorber
EP0399326B1 (en) Shockabsorber
EP0484648A1 (en) Limit stop with damping device
DE4137821A1 (en) HYDRAULIC, ADJUSTABLE VIBRATION DAMPER
EP1447571B1 (en) Cylinder with adjustable end of stroke damping
WO1998038439A1 (en) Fluid impact absorber
DE202005009670U1 (en) Pneumatic drive muffler, has pressure sensor that produces warning signal and switches off pneumatic drive when impact pressure within cavity increased due to increased contamination of muffler reaches predetermined limit pressure
DE102019117233A1 (en) Pressure return piston with annular shoulder
DE3506180A1 (en) PISTON CYLINDER ARRANGEMENT
DE102005013986B3 (en) Fluid device comprises units for producing a magnetic field coupled with an actuating piston and a damping channel
DE102005015216B4 (en) Damping device for linear drives
DE10148603B4 (en) Actuator unit with at least two actuator elements
DE10114472A1 (en) Electromagnet for driving hydraulic valve has choke point in armature with displaceable choke element that can be adjusted from outside by using actuating bolt
DE19516442A1 (en) Vacuum valve
WO1999032808A1 (en) Gear shifting unit
DE102004004930A1 (en) Energy-conversion device for converting pneumatic energy into electrical energy has a working chamber, a pressure delivery connection, a plunger, a permanent magnet and a coil
DE10158123A1 (en) Dampened pressure medium cylinder
DE4422528A1 (en) Fluid-operated drive unit
WO1991007606A1 (en) Adjustable shock-absorber
EP3070721B1 (en) Actuation device
EP1416166B1 (en) Pneumatic actuator with stroke end cushioning
DE4107599A1 (en) Remotely adjustable car shock absorber - includes valve restoration spring with limited expansion determining emergency position of sliding adjuster of flow constriction
WO2011141090A1 (en) Pressure medium cylinder having end-position damping
EP1225343A1 (en) Driving device with a fluid operated actuator
EP1259966A1 (en) Electromagnet for actuating the control element of a valve

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

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

17P Request for examination filed

Effective date: 20040906

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

AKX Designation fees paid

Designated state(s): DE FR GB SE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB SE

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 502004000056

Country of ref document: DE

Date of ref document: 20051013

Kind code of ref document: P

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

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

Effective date: 20051128

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: BUEMACH ENGINEERING INTERNATIONAL B.V.

Effective date: 20060308

ET Fr: translation filed
PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PLBP Opposition withdrawn

Free format text: ORIGINAL CODE: 0009264

PLBD Termination of opposition procedure: decision despatched

Free format text: ORIGINAL CODE: EPIDOSNOPC1

PLBM Termination of opposition procedure: date of legal effect published

Free format text: ORIGINAL CODE: 0009276

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

Free format text: STATUS: OPPOSITION PROCEDURE CLOSED

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

Ref country code: SE

Payment date: 20091222

Year of fee payment: 7

27C Opposition proceedings terminated

Effective date: 20090928

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

Ref country code: FR

Payment date: 20100315

Year of fee payment: 7

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

Ref country code: GB

Payment date: 20100219

Year of fee payment: 7

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20110210

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20111102

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

Ref country code: FR

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

Effective date: 20110228

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

Ref country code: GB

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

Effective date: 20110210

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: 20110211

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502004000056

Country of ref document: DE

Representative=s name: BBS BIER BREHM SPAHN PARTNERSCHAFT RECHTSANWAE, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 502004000056

Country of ref document: DE

Representative=s name: MAIWALD PATENTANWALTS- UND RECHTSANWALTSGESELL, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502004000056

Country of ref document: DE

Representative=s name: BBS BIER BREHM SPAHN PARTNERSCHAFT RECHTSANWAE, DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 502004000056

Country of ref document: DE

Owner name: AVENTICS GMBH, DE

Free format text: FORMER OWNER: REXROTH MECMAN GMBH, 30880 LAATZEN, DE

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

Ref country code: DE

Payment date: 20230119

Year of fee payment: 20

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230529

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 502004000056

Country of ref document: DE