EP0395915B1 - Working cylinder without piston rod - Google Patents

Working cylinder without piston rod Download PDF

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Publication number
EP0395915B1
EP0395915B1 EP90106762A EP90106762A EP0395915B1 EP 0395915 B1 EP0395915 B1 EP 0395915B1 EP 90106762 A EP90106762 A EP 90106762A EP 90106762 A EP90106762 A EP 90106762A EP 0395915 B1 EP0395915 B1 EP 0395915B1
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EP
European Patent Office
Prior art keywords
band
guide
receiving chamber
piston
sealing
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
EP90106762A
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German (de)
French (fr)
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EP0395915A3 (en
EP0395915A2 (en
Inventor
Heinz Podlesak
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Norgren Martonair GmbH
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Norgren Martonair GmbH
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Publication date
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Priority to AT90106762T priority Critical patent/ATE99774T1/en
Publication of EP0395915A2 publication Critical patent/EP0395915A2/en
Publication of EP0395915A3 publication Critical patent/EP0395915A3/en
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Publication of EP0395915B1 publication Critical patent/EP0395915B1/en
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    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/084—Characterised by the construction of the motor unit the motor being of the rodless piston type, e.g. with cable, belt or chain

Definitions

  • the invention relates to a rodless working cylinder with at least one band connecting a piston with a force-transmitting member, which at least one cylinder cover arranged at one end of a cylinder tube receiving the piston is displaceably penetrated coaxially or axially parallel to the piston, the cylinder cover having a receiving chamber penetrated by the band , which is wider than the band, has rounded ends on the sides and in which, facing the piston, two similar, strip-like sealing elements made of elastic material, which are pressed against the wall of the receiving chamber with prestress on both broad sides of the band, and then facing away from the piston, a slot for the band passage has band guide made of dimensionally stable material, which is also supported against the wall of the receiving chamber.
  • Such a band cylinder is known from DE-B-1 293 037.
  • the sealing elements are designed as cylindrical rods made of elastic material, which are arranged on two sides of the band, and the band guide consists of a plate provided with a slot for the passage of the band, which is releasably supported by a cover part on the cylinder cover. In the cover part there is an extension of the receiving chamber, which with Felt tape is filled.
  • the cylindrical rods and the felt cause relatively high friction when the belt moves, which impairs the function of the known working cylinder.
  • the different mounts of cylindrical rods, tape guide and felt can result in a center offset of these parts, which can cause further functional impairment.
  • the band of such working cylinders is usually designed as a flat steel or plastic band
  • AT-A-364 621 it is known to arrange a lubricating plate for the band on the piston side of a seal designed in the manner of a conical stopper; when the belt is moved, the lubricated belt should press the seal into a housing cone by friction and thus bring about a sealing pressure on the belt.
  • a lubricating plate for the band on the piston side of a seal designed in the manner of a conical stopper
  • German Offenlegungsschrift DE-A-2404 244 shows a band cylinder which differs from the above-mentioned features and in which a pressure-assisted, rod-like lip seal is provided for sealing the band, one lip on the broad side of the band and the other lip on the other Wall of a receiving space for the lip seal is applied.
  • the tape guide should be able to guide the tape securely even when large deflection forces occur.
  • each guide element has a web-like body engaging in the first groove, that each sealing element in the central region of its longitudinal extent is an outgoing from the first groove and to this right-angled, leading to the outer contour
  • second groove has that each guide element has an extension engaging in the second groove, which ends with a clearance in front of the wall of the receiving chamber with a stop surface, and that each guide element laterally of the extension it each has a pin extension running parallel to this, also with the clearance distance in front of the wall of the receiving chamber with a stop surface, which is located in a bore-like recess of the sealing element.
  • This design of the working cylinder results in that the band seal and the band guide are arranged in a common receiving chamber of the cylinder cover, whereby no center offset between the band seal and band guide can occur even with large tolerance dimensions of the cylinder cover.
  • the Toleranzmenabwei corrections are taken up by the elasticity of the band seal, the elasticity of which also prestresses the band guide towards the band; this elastic pre-tension of the band guide is only overcome when large deflection forces occur on the band and after a slight lateral displacement of the band guide corresponding to the clearance, the latter is supported directly against the cylinder cover and can thus reliably prevent the band from further deflection.
  • the rodless working cylinder has in a cylinder tube 1 a sealingly displaceably guided piston 2, from which belts 3, 4 made of steel or plastic on both sides lead to deflection rollers 5, 6 to a force output member 7; the working cylinder thus represents a typical band cylinder.
  • the cylinder tube 1 is closed on both sides by cylinder covers 8.9 in which the deflection rollers 5.6 are mounted; the steel strips 3 and 4 in their sections between the piston 2 and the deflection rollers 5 and 6 in the receiving chambers 10, 11 of the cylinder covers 8, 9 arranged sealing and guiding members, which are described in more detail below.
  • the individual unit X in Figure 1, that is, the receiving chamber 10, is shown in Figure 7 on an enlarged scale.
  • the receiving chamber 10 has an elongated shape extending transversely to the longitudinal direction of the band, its length being greater than the width of the band, and it is rounded at both ends. In supervision, the receiving chamber 10 thus has a shape which is similar to that according to FIG. 3 of the already mentioned DE-B-1 293 037.
  • the design and configuration of the receiving chamber 11 corresponds to that of the receiving chamber 10, taking into account the mirror-image arrangement.
  • the sealing and guiding members are shown in FIGS. 2 to 6 in their arrangement relating to the band 3 in the open, not in the state arranged in the receiving chamber 10 in the corresponding enlarged scale in FIG.
  • the sealing element has two sealing elements 12 and 13 made of elastic material, preferably an elastomer, of the same design and arranged in mirror image to one another to the band 3.
  • the outer contour 14 of the sealing elements 12, 13 essentially corresponds to the contour of the wall 15 of the receiving chamber 10, in such a way that the sealing elements 12 and 13 with little elastic deformation, which press against the Band 3 causes can be inserted into the receiving chamber 10.
  • the elongated, strip-like sealing elements 12, 13 facing the piston are designed as lip seals, such that one lip 16 on the broad side 17 of the band 3 and the other lip 18 on the wall 15 of the receiving chamber 10 come to rest.
  • the sealing elements 12, 13 each have a pressure bead 19 which is approximately triangular in cross section in both end areas of their longitudinal extension, the pressure beads 19 reinforcing the elastic pressure when the sealing elements 12, 13 are inserted into the receiving chamber 10 the band 3.
  • the triangular pressure bead cross section supports the mounting of the mirror plane of the two sealing elements 12, 13 in the central height position in the receiving chamber 10 due to its progressively increasing deformation resistance when pressed in.
  • the sealing elements 12, 13 are on their rear side facing away from the piston 2 each provided with a first groove 20 which runs parallel to the broad side 17 of the band 3 and runs transversely to this and to the band 3 and to the rear. Furthermore, the sealing elements 12, 13 have a second groove 21 in the central region of their longitudinal extent, each of which emanates from the first groove 20 and leads from it at right angles to the outer contour 14. On both sides of the groove 21 there is a bore-like recess 22 which runs essentially parallel to the second groove 21 and opens into the first groove 20 with at least the largest part of its cross section.
  • a guide element 23, 24 of the guide member rests on each sealing element 12.13, the guide elements 23, 24 are of identical design and are arranged in mirror image with respect to the band 3.
  • the guide elements 23, 24 have an approximately web-shaped or rod-shaped body 25 which engages in the first groove 20, a distance 26 (FIG. 4) from the groove side wall remaining in the non-installed state of the sealing and guide members, which Inserting the guide and sealing members into the receiving chamber 10 by elastic deformation of the sealing elements 12, 13 is completely eliminated; in the installed state, the guide elements 23, 24 are pressed elastically against the band 3 by the elastic deformation of the sealing elements 12, 13.
  • the guide elements 23, 24 each have an extension 27 in the center, which is located in the second groove 21 and which ends with a stop surface 28 which, when mounted in the receiving chamber 10, is at a clearance 29 in front of the wall 15.
  • the extension 27 is provided on the part of its stop surface 28 with a recess 30 into which a tool for lifting the guide element 23, 24 out of the grooves 20, 21 of the sealing element 12, 13 can be inserted.
  • the guide elements 23, 24 have pin attachments 31 which engage in the recesses 22 and which end with stop faces 32, which are in one plane with the stop faces 28 and thus, when installed in the receiving chamber 10, also at clearance 29 are in front of the wall 15.
  • the guide elements 23, 24 are made of a dimensionally stable material with a low coefficient of friction, such as, for example, a ceramic, PTFE or an ultra-high-molecular low-pressure polyethylene.
  • the receiving chambers 10, 11 are closed on their sides facing away from the piston 2 by a cover 33 which is detachably fastened to the cylinder covers 8, 9 and which has a slot 34 penetrated by the band 3 with play on all sides, as shown in FIG. 7 can be seen.
  • the sealing lips 16 and 18 of the sealing elements 12, 13 rest against their respective counter surfaces, the broad side 17 or wall 15, with elastic prestress, and the elasticity of the sealing elements 12, 13 simultaneously presses the guide elements 23 , 24 elastic to the band 3.
  • the sealing lips 16 encompass the narrow sides of the band 3 with elastic deformation and seal them.
  • FIG. 8 and 9 represent enlarged sections of FIG. 4 in accordance with the circle Y there.
  • the relationships shown in FIG. 8 result, the guide elements 23 and 24 being located , as described above, on the broad sides 17 of the band 3 with elastic pressure.
  • the guide elements 23, 24 it is also possible to provide the guide elements 23, 24 with a recess 35 on the hinge side, as can be seen from FIG.
  • the depth of the recess 35 corresponds to at least half the thickness of the band 3, it is expediently larger by a small amount of play, and the width of the recess 35 is also a game size larger than the width of the band 3
  • edge areas adjoining one another have a slot formed from the recesses 35 which can be penetrated by the band 3 without contact to the guide elements 23, 24.
  • the guide elements 23 and 24 are supported against one another, ie they are not in contact with the belt 3 and the latter can pass the guide elements 23, 24 smoothly in its desired position. this further reduces the overall friction of the belts 3 and 4 of the working cylinder.
  • the sealing elements can be formed as a compact seal, eliminating the lips 16, 18, but mostly a higher friction has to be accepted.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Saccharide Compounds (AREA)

Abstract

The working cylinder without piston rod is designed as a band cylinder, the band (3) in the cylinder covers (8) passing through a location chamber (10) for a sealing member and a guide member. The sealing member consists of a strip-like sealing element of elastic material on either side of the band, which sealing element can be designed as a lip seal on the piston side. The sealing elements (12, 13) are inserted into the location chamber (10) with elastic tensioning towards the band (3). The guide member arranged remote from the piston relative to the sealing member has a web-like guide element (23, 24) on either side of the band (3), which guide element (23, 24) is likewise pressed elastically against the band (3) by the tensioning of the sealing elements (12, 13). By means of stop surfaces (28), the guide elements (23, 24) end with a clearance gap (29) in front of the wall (15) of the location chamber (10). The result of this is that the band (3) can be elastically deflected from its desired position only by the clearance gap (29), positive-locking support of the guide elements (23, 24) on the cylinder cover (8) is then effected, and thus no further band deflection is possible. <IMAGE>

Description

Die Erfindung betrifft einen kolbenstangenlosen Arbeitszylinder, mit wenigstens einem einen Kolben mit einem Kraftabgabeglied verbindenden Band, welches wenigstens einen an einem Ende eines den Kolben aufnehmenden Zylinderrohres angeordneten Zylinderdeckel gleichachsig bzw. achsparallel zum Kolben abgedichtet verschieblich durchsetzt, wobei der Zylinderdeckel eine vom Band durchsetzte Aufnahmekammer aufweist, die breiter als das Band ist, seitlich abgerundete Enden aufweist und in welcher sich kolbenzugewandt zwei gleichartige, durch Abstützung an der Wand der Aufnahmekammer mit Vorspannung an beide Breitseiten des Bandes angedrückte, leistenartige Dichtelemente aus elastischem Werkstoff und kolbenabgewandt anschließend eine einen Schlitz für den Banddurchtritt aufweisende Bandführung aus formstabielem Werkstoff befindet, die ebenfalls gegen die Wand der Aufnahmekammer abstützbar ist.The invention relates to a rodless working cylinder with at least one band connecting a piston with a force-transmitting member, which at least one cylinder cover arranged at one end of a cylinder tube receiving the piston is displaceably penetrated coaxially or axially parallel to the piston, the cylinder cover having a receiving chamber penetrated by the band , which is wider than the band, has rounded ends on the sides and in which, facing the piston, two similar, strip-like sealing elements made of elastic material, which are pressed against the wall of the receiving chamber with prestress on both broad sides of the band, and then facing away from the piston, a slot for the band passage has band guide made of dimensionally stable material, which is also supported against the wall of the receiving chamber.

Ein derartiger Bandzylinder ist aus der DE-B-1 293 037 bekannt. Die Dichtelemente sind dabei als zylindrische Stäbe aus elastischem Material ausgebildet, die zu je zweien beiderseitig des Bandes angeordnet sind, und die Bandführung besteht aus einer mit einem Schlitz zum Durchtritt des Bandes versehenen Platte, welche durch ein Deckelteil am Zylinderdeckel lösbar gehaltert ist. Im Deckelteil befindet sich eine Erweiterung der Aufnahmekammer, welche mit am Band anliegenden Filz gefüllt ist. Die zylindrischen Stäbe sowie der Filz verursachen bei Bewegungen des Bandes relativ hohe Reibungen, wodurch die Funktion des bekannten Arbeitszylinders beeinträchtigt wird. Außerdem kann sich durch die unterschiedlichen Halterungen von zylindrischen Stäben, Bandführung und Filz ein Mittenversatz dieser Teile ergeben, wodurch eine weitere Funktionsdbeeinträchtigung verursacht werden kann.Such a band cylinder is known from DE-B-1 293 037. The sealing elements are designed as cylindrical rods made of elastic material, which are arranged on two sides of the band, and the band guide consists of a plate provided with a slot for the passage of the band, which is releasably supported by a cover part on the cylinder cover. In the cover part there is an extension of the receiving chamber, which with Felt tape is filled. The cylindrical rods and the felt cause relatively high friction when the belt moves, which impairs the function of the known working cylinder. In addition, the different mounts of cylindrical rods, tape guide and felt can result in a center offset of these parts, which can cause further functional impairment.

Das Band derartiger Arbeitszylinder ist üblicherweise als flaches Stahl- oder Kunststoffband ausgebildet
Aus der österreichischen Patentschrift AT-A-364 621 ist es bekannt, einer in Art eines konischen Stopfens ausgebildeten Dichtung kolbenseitig eine Schmierplatte für das Band vorzuordnen; bei Bewegung des Bandes soll das geschmierte Band die Dichtung durch Reibung in einen Gehäusekonus drücken und so eine dichtende Anpressung an das Band bewirken. Auch hier tritt trotz Schmierung also eine beachtliche Reibung auf, außerdem ist keine Bandführung vorgesehen.The band of such working cylinders is usually designed as a flat steel or plastic band
From the Austrian patent specification AT-A-364 621 it is known to arrange a lubricating plate for the band on the piston side of a seal designed in the manner of a conical stopper; when the belt is moved, the lubricated belt should press the seal into a housing cone by friction and thus bring about a sealing pressure on the belt. Here, too, there is considerable friction despite lubrication, and no belt guide is provided.

Die deutsche Offenlegungsschrift DE-A-2404 244 zeigt einen im übrigen von den eingangs genannten Merkmalen abweichenden Bandzylinder, bei welchem zur Abdichtung des Bandes eine druckmittelunterstützte, stabartige Lippendichtung vorgesehen ist, deren jeweils eine Lippe auf der Breitseite des Bandes und deren andere Lippe an der Wand eines Aufnahmeraumes für die Lippendichtung anliegt.German Offenlegungsschrift DE-A-2404 244 shows a band cylinder which differs from the above-mentioned features and in which a pressure-assisted, rod-like lip seal is provided for sealing the band, one lip on the broad side of the band and the other lip on the other Wall of a receiving space for the lip seal is applied.

Es ist Aufgabe der Erfindung, einen kolbenstangenlosen Arbeitszylinder der eingangs genannten Art in einfacher Weise derart auszubilden, daß eine gute Bandführung unter Vermeiden eines störenden Mittenversatzes zur Banddichtung gewährleistet ist, wobei zugleich die Reibungen von Bandführung und Banddichtung bei Bewegungen des Bandes niedrig gehalten werden. Die Bandführung soll dabei jedoch in der Lage sein, das Band auch bei Auftreten großer Auslenkkräfte sicher zu führen.It is an object of the invention to provide a rodless cylinder of the type mentioned in a simple manner such that good tape guidance is ensured while avoiding an annoying center offset to the tape seal, while the friction of the tape guide and tape seal are kept low when the tape is moving. However, the tape guide should be able to guide the tape securely even when large deflection forces occur.

Diese Aufgabe wird nach der Erfindung für einen Arbeitszylinder der eingangs genannten Art dadurch gelöst, daß die in ihrer Außenkontur im wesentlichen der Kontur der Wand der Aufnahmekammer entsprechenden Dichtelemente auf ihren kolbenabgewandten Seiten je eine parallel zur Breitseite des Bandes und quer zu diesem verlaufende und zu diesem hin offene, erste Nut aufweisen, daß die Bandführung in Bandebene in zwei gleichartige Führungselemente geteilt ausgebildet ist, wobei jedes Führungselement einen in die erste Nut eingreifenden, stegartigen Körper aufweist, daß jedes Dichtelement im mittleren Bereich seiner Längserstreckung eine von der ersten Nut ausgehende und zu dieser rechtwinklig verlaufende, zur Außenkontur führende, zweite Nut aufweist, daß jedes Führungselement einen in die zweite Nut eingreifenden Fortsatz aufweist, der mit einem Spielabstand vor der Wand der Aufnahmekammer mit einer Anschlagfläche endet, und daß jedes Führungselement seitlich des Fortsatzes je einen parallel zu diesem verlaufenden, ebenfalls mit dem Spielabstand vor der Wand der Aufnahmekammer mit einer Anschlagfläche endenden Stiftansatz aufweist, der sich in einer bohrungsartigen Ausnehmung des Dichtelementes befindet.This object is achieved according to the invention for a working cylinder of the type mentioned in that the sealing elements corresponding in their outer contour essentially to the contour of the wall of the receiving chamber on their side facing away from the piston each have a parallel to the broad side of the band and transverse to this and to this have open, first groove that the band guide is formed in the band plane divided into two identical guide elements, each guide element having a web-like body engaging in the first groove, that each sealing element in the central region of its longitudinal extent is an outgoing from the first groove and to this right-angled, leading to the outer contour, second groove has that each guide element has an extension engaging in the second groove, which ends with a clearance in front of the wall of the receiving chamber with a stop surface, and that each guide element laterally of the extension it each has a pin extension running parallel to this, also with the clearance distance in front of the wall of the receiving chamber with a stop surface, which is located in a bore-like recess of the sealing element.

Durch diese Ausbildung des Arbeitszylinders ergibt sich, daß die Banddichtung und die Bandführung in einer gemeinsamen Aufnahmekammer des Zylinderdeckels angeordnet sind, wodurch auch bei großen Toleranzmaßabwei chungen des Zylinderdeckels kein Mittenversatz zwischen Banddichtung und Bandführung auftreten kann. Die Toleranzmaßabwei chungen werden dabei von der Elastizität der Banddichtung aufgenommen, deren Elastizität zugleich die Bandführung in Richtung zum Band vorspannt; nur bei Auftreten großer Auslenkkräfte am Band wird diese elastische Vorspannung der Bandführung überwunden und nach einer dem Spielabstand entsprechenden, geringen Seitenverschiebung der Bandführung stützt sich letztere unmittelbar gegen den Zylinderdeckel ab und kann so das Band sicher an einer weiteren Auslenkung hindern.This design of the working cylinder results in that the band seal and the band guide are arranged in a common receiving chamber of the cylinder cover, whereby no center offset between the band seal and band guide can occur even with large tolerance dimensions of the cylinder cover. The Toleranzmaßabwei corrections are taken up by the elasticity of the band seal, the elasticity of which also prestresses the band guide towards the band; this elastic pre-tension of the band guide is only overcome when large deflection forces occur on the band and after a slight lateral displacement of the band guide corresponding to the clearance, the latter is supported directly against the cylinder cover and can thus reliably prevent the band from further deflection.

Nach der weiteren Erfindung zweckmäßige Ausgestaltungsmöglichkeiten für einen entsprechend den vorstehend angegebenen Merkmalen ausgebildeten Arbeitszylinder sind den Unteransprüchen entnehmbar.According to the further invention expedient design options for a working cylinder designed in accordance with the features specified above can be found in the subclaims.

Die Zeichnung zeigt Ausführungsmöglichkeiten für nach der Erfindung ausgebildete Arbeitszylinder, und zwar zeigt

Fig.1
einen Längsschnitt durch einen Arbeitszylinder,
Fig.2 bis Fig.6
die Anordnung der Dicht- und Führungselemente im nicht eingebauten Zustand, relativ zum Band, und zwar zeigt
Fig.2
eine Ansicht von Seiten des Kolbens,
Fig.3
eine Aufsicht und
Fig.4
eine Ansicht der kolbenabgewandten Seite,
Fig.5
einen Schnitt gemäß der Linie I-I in Fig.2 und
Fig.6
einen Schnitt gemäß der Linie II-II in Fig.2; weiterhin zeigt
Fig.7
einen der Fig.6 entsprechenden Schnitt im eingebauten Zustand der Dichtungs- und Führungselemente,
Fig.8
eine erste und
Fig.9
eine zweite Ausführungsform für die Führungselemente.
The drawing shows design options for working cylinders designed according to the invention, namely shows
Fig. 1
a longitudinal section through a working cylinder,
Fig. 2 to Fig. 6
the arrangement of the sealing and guide elements in the non-installed state, relative to the tape, shows
Fig. 2
a view from the side of the piston,
Fig. 3
supervision and
Fig. 4
a view of the side facing away from the piston,
Fig. 5
a section along the line II in Fig.2 and
Fig. 6
a section along the line II-II in Figure 2; continues to show
Fig. 7
6 shows a section corresponding to FIG. 6 in the installed state of the sealing and guide elements,
Fig. 8
a first and
Fig. 9
a second embodiment for the guide elements.

Der kolbenstangenlose Arbeitszylinder weist in einem Zylinderrohr 1 einen abgedichtet verschieblich geführten Kolben 2 auf, von welchem beiderseits aus Stahl oder Kunststoff gefertigte Bänder 3,4 über Umlenkrollen 5,6 zu einem Kraftabgabeglied 7 führen; der Arbeitszylinder stellt damit einen typischen Bandzylinder dar. Das Zylinderrohr 1 ist beidereitig durch Zylinderdeckel 8,9 abgeschlossen, in welchen die Umlenkrollen 5,6 gelagert sind; die Stahlbänder 3 und 4 durchsetzen in ihren Abschnitten zwischen dem Kolben 2 und den Umlenkrollen 5 bzw. 6 in Aufnahmekammern 10,11 der Zylinderdeckel 8,9 angeordnete Abdichtungs- und Führungsorgane, welche nachfolgend genauer beschrieben werden. Die Einzel heit X in Fig.1, also die Aufnahmekammer 10, ist in Fig.7 in vergrößertem Maßstab dargestellt. Die Aufnahmekammer 10 weist eine quer zur Bandlängsrichtung verlaufende, längliche Gestalt auf, wobei ihre Länge größer als die Breite des Bandes ist, und sie ist an ihren beiden Enden abgerundet. In Aufsicht weist somit die Aufnahmekammer 10 eine Gestalt auf, welche derjenigen nach Fig.3 der bereits erwähnten DE-B-1 293 037 ähnelt. Die Aufnahmekammer 11 entspricht in ihrer Ausgestaltung und Ausstattung unter Berücksichtigung spiegelbildlicher Anordnung der Aufnahmekammer 10.The rodless working cylinder has in a cylinder tube 1 a sealingly displaceably guided piston 2, from which belts 3, 4 made of steel or plastic on both sides lead to deflection rollers 5, 6 to a force output member 7; the working cylinder thus represents a typical band cylinder. The cylinder tube 1 is closed on both sides by cylinder covers 8.9 in which the deflection rollers 5.6 are mounted; the steel strips 3 and 4 in their sections between the piston 2 and the deflection rollers 5 and 6 in the receiving chambers 10, 11 of the cylinder covers 8, 9 arranged sealing and guiding members, which are described in more detail below. The individual unit X in Figure 1, that is, the receiving chamber 10, is shown in Figure 7 on an enlarged scale. The receiving chamber 10 has an elongated shape extending transversely to the longitudinal direction of the band, its length being greater than the width of the band, and it is rounded at both ends. In supervision, the receiving chamber 10 thus has a shape which is similar to that according to FIG. 3 of the already mentioned DE-B-1 293 037. The design and configuration of the receiving chamber 11 corresponds to that of the receiving chamber 10, taking into account the mirror-image arrangement.

Die Dichtungs- und Führungsorgane sind in den Fig.2 bis 6 in ihrer auf das Band 3 bezogenen Anordnung im Freien, nicht in die Aufnahmekammer 10 eingeordnetem Zustand in der Fig.7 entsprechendem, vergrößerten Maßstab dargestellt. Das Dichtorgan weist zwei gleichartig ausgebildete, zueinander spiegelbildlich zum Band 3 angeordnete Dichtelemente 12 und 13 aus elastischem Werkstoff, vorzugsweise einen Elastomer, auf. Die Außenkontur 14 der Dichtelemente 12,13 entspricht im wesentlichen der Kontur der Wand 15 der Aufnahmekammer 10, derart, daß die Dichtelemente 12 und 13 unter geringer, elastischer Verformung, welche ein Andrücken an das Band 3 bewirkt, in die Aufnahmekammer 10 einsetzbar sind. Die länglichen, leistenartigen Dichtelemente 12, 13 sind kolbenzugewandt als Lippendichtung ausgebildet, derart, daß die eine Lippe 16 auf der Breitseite 17 des Bandes 3 und die andere Lippe 18 an der Wand 15 der Aufnahmekammer 10 zur Anlage gelangt. Im an die Lippe 18 anschließenden Bereich der Außenkontur 14 weisen die Dichtelemente 12,13 in beiden Endbereichen ihrer Längsertreckung je einen im Querschnitt etwa dreieckigen Andruckwulst 19 auf, die Andruckwulste 19 verstärken beim Einsetzen der Dichtelemente 12,13 in die Aufnahmekammer 10 die elastische Andrückung an das Band 3. Der dreieckige Andruckwulst-Querschnitt unterstützt durch durch seinen bei Eindrückung progressiv ansteigenden Verformungswiderstand die Halterung der Spiegelebene der beiden Dichtelemente 12,13 in der mittigen Höhenlage in der Aufnahmekammer 10. Auf ihrer dem Kolben 2 abgewandten Rückseite sind die Dichtelemente 12,13 mit je einer parallel zur Breitseite 17 des Bandes 3 und quer zu diesem verlaufenden und zum Band 3 sowie zur Rückseite hin offenen, ersten Nut 20 versehen. Weiterhin weisen die Dichtelemente 12,13 im mittleren Bereich ihrer Längserstreckung eine zweite Nut 21 auf, welche jeweils von der ersten Nut 20 ausgeht und von dieser rechtwinklig zur Außenkontur 14 führt. Beiderseits der Nut 21 befindet sich jeweils eine bohrungsartige Ausnehmung 22, welche im wesentlichen parallel zur zweiten Nut 21 verläuft und mit zumindest dem größten Teil ihres Querschnittes in die erste Nut 20 einmündet.The sealing and guiding members are shown in FIGS. 2 to 6 in their arrangement relating to the band 3 in the open, not in the state arranged in the receiving chamber 10 in the corresponding enlarged scale in FIG. The sealing element has two sealing elements 12 and 13 made of elastic material, preferably an elastomer, of the same design and arranged in mirror image to one another to the band 3. The outer contour 14 of the sealing elements 12, 13 essentially corresponds to the contour of the wall 15 of the receiving chamber 10, in such a way that the sealing elements 12 and 13 with little elastic deformation, which press against the Band 3 causes can be inserted into the receiving chamber 10. The elongated, strip-like sealing elements 12, 13 facing the piston are designed as lip seals, such that one lip 16 on the broad side 17 of the band 3 and the other lip 18 on the wall 15 of the receiving chamber 10 come to rest. In the area of the outer contour 14 adjoining the lip 18, the sealing elements 12, 13 each have a pressure bead 19 which is approximately triangular in cross section in both end areas of their longitudinal extension, the pressure beads 19 reinforcing the elastic pressure when the sealing elements 12, 13 are inserted into the receiving chamber 10 the band 3. The triangular pressure bead cross section supports the mounting of the mirror plane of the two sealing elements 12, 13 in the central height position in the receiving chamber 10 due to its progressively increasing deformation resistance when pressed in. The sealing elements 12, 13 are on their rear side facing away from the piston 2 each provided with a first groove 20 which runs parallel to the broad side 17 of the band 3 and runs transversely to this and to the band 3 and to the rear. Furthermore, the sealing elements 12, 13 have a second groove 21 in the central region of their longitudinal extent, each of which emanates from the first groove 20 and leads from it at right angles to the outer contour 14. On both sides of the groove 21 there is a bore-like recess 22 which runs essentially parallel to the second groove 21 and opens into the first groove 20 with at least the largest part of its cross section.

Auf der dem Kolben 2 abgewandten Rückseite liegt an jedem Dichtelement 12.13 jeweils ein Führungselement 23,24 des Führungsorgans an, die Führungselemente 23,24 sind gleichartig gestaltet und zueinander zum Band 3 spiegelbildlich angeordnet. Die Führungselemente 23,24 weisen einen etwa steg- oder stabförmigen Körper 25 auf, welcher in die erste Nut 20 eingreift, wobei im nicht eingebauten Zustand der Dichtungs- und Führungsorgane ein Abstand 26 (Fig.4) zur Nut-Seitenwandung verbleibt, welcher beim Einsetzen der Führungs- und Dichtungsorgane in die Aufnahmekammer 10 durch elastische Verformung der Dichtelemente 12,13 vollständig entfällt; im eingebauten Zustand werden die Führungselemente 23,24 durch die elastische Verformung der Dichtelemente 12,13 elastisch an das Band 3 angedrückt. Die Führungselemente 23,24 weisen mittig jeweils einen Fortsatz 27 auf, der sich in der zweiten Nut 21 befindet und der mit einer Anschlagfläche 28 endet, welche im in die Aufnahmekammer 10 montierten Zustand sich in einem Spielabstand 29 vor der Wand 15 befindet. Der Fortsatz 27 ist seitens seiner Anschlagfläche 28 mit einer Aussparug 30 versehen, in welche ein Werkzeug zum Ausheben des Führungselementes 23,24 aus den Nuten 20,21 des Dichtelementes 12,13 einführbar ist. Seitlich des Fortsatzes 27 weisen die Führungselemente 23,24 Stiftansätze 31 auf, welche in die Ausnehmungen 22 eingreifen und welche mit Anschlagflächen 32 enden, welche sich in einer Ebene mit den Anschlagflächen 28 befinden und somit im in die Aufnahmekammer 10 eingebauten Zustand ebenfalls im Spielabstand 29 vor der Wandung 15 befinden. Die Führungselemente 23,24 sind aus einem formstabilen Werkstoff mit niedrigem Reibkoeffizienten, wie beispielsweise einer Keramik, PTFE oder einem ultrahochmolekularen Niederdruckpolyäthyen gefertigt.On the rear side facing away from the piston 2, a guide element 23, 24 of the guide member rests on each sealing element 12.13, the guide elements 23, 24 are of identical design and are arranged in mirror image with respect to the band 3. The guide elements 23, 24 have an approximately web-shaped or rod-shaped body 25 which engages in the first groove 20, a distance 26 (FIG. 4) from the groove side wall remaining in the non-installed state of the sealing and guide members, which Inserting the guide and sealing members into the receiving chamber 10 by elastic deformation of the sealing elements 12, 13 is completely eliminated; in the installed state, the guide elements 23, 24 are pressed elastically against the band 3 by the elastic deformation of the sealing elements 12, 13. The guide elements 23, 24 each have an extension 27 in the center, which is located in the second groove 21 and which ends with a stop surface 28 which, when mounted in the receiving chamber 10, is at a clearance 29 in front of the wall 15. The extension 27 is provided on the part of its stop surface 28 with a recess 30 into which a tool for lifting the guide element 23, 24 out of the grooves 20, 21 of the sealing element 12, 13 can be inserted. To the side of the extension 27, the guide elements 23, 24 have pin attachments 31 which engage in the recesses 22 and which end with stop faces 32, which are in one plane with the stop faces 28 and thus, when installed in the receiving chamber 10, also at clearance 29 are in front of the wall 15. The guide elements 23, 24 are made of a dimensionally stable material with a low coefficient of friction, such as, for example, a ceramic, PTFE or an ultra-high-molecular low-pressure polyethylene.

Die Aufnahmekammern 10,11 sind auf ihrer dem Kolben 2 abgewandten Seiten durch jeweils einen Deckel 33 verschlossen, der an den Zylinderdeckeln 8,9 lösbar befestigt ist und der einen vom Band 3 mit allseitigem Spiel durchsetzten Schlitz 34 aufweist, wie es aus Fig.7 ersichtlich ist.The receiving chambers 10, 11 are closed on their sides facing away from the piston 2 by a cover 33 which is detachably fastened to the cylinder covers 8, 9 and which has a slot 34 penetrated by the band 3 with play on all sides, as shown in FIG. 7 can be seen.

Im montierten Zustand liegen, wie bereits erwähnt, die Dichtlippen 16 bzw. 18 der Dichtelemente 12,13 mit elastischer Vorspannung an ihren jeweiligen Gegenflächen, der Breitseite 17 bzw. Wand 15, an und die Elastizität der Dichtelemente 12,13 drückt zugleich die Führungselemente 23,24 elastisch an das Band 3 an. Die Dichtlippen 16 umgreifen dabei unter elastischer Verformung auch die Schmal seiten des Bandes 3 und dichten diese ab. Bei Druckmittelbeaufschlagung des zwischen den Dichtelementen 12,13 und dem Kolben 2 befindlichen Raumes wird die Anlagekraft der Lippen 16,18 entsprechend der Beaufschlagungsdruckhöhe verstärkt, die dichte Anlage wird somit gewährleistet, wobei sogleich bei Bewegungen des Bandes 3 zwischen diesem und der Dichtlippe 16 nur geringe, in Abhängigkeit von der Beaufschlagungsdruckhöhe stehende Reibungen auftreten. An den Führungselementen 23,24, welche das Band in seiner Sollage führen, treten ebenfalls nur geringe Reibungskräfte auf; die Gesamtreibung der Dichtungs- und Führungsorgane zu den Bändern 3,4 wird somit gering gehalten. Bei Auftreten von Seitenkraftkomponenten ist das Band 3 gegen die elastischen Verformungskräfte für die Dichtelemente 12,13 um den Spielabstand 29 auslenkbar, nach Erreichen einer maximalen Auslenkung um diesen Spielabstand 29 schlagen die Anschlagflächen 28 und 29 eines Führungselementes 23,24 an der Wand 15 an und stützen formschlüssig dieses Führungselement 23,24 ab, so daß keine weitere Auslenkung erfolgen kann.In the assembled state, as already mentioned, the sealing lips 16 and 18 of the sealing elements 12, 13 rest against their respective counter surfaces, the broad side 17 or wall 15, with elastic prestress, and the elasticity of the sealing elements 12, 13 simultaneously presses the guide elements 23 , 24 elastic to the band 3. The sealing lips 16 encompass the narrow sides of the band 3 with elastic deformation and seal them. When pressure is applied to the space between the sealing elements 12, 13 and the piston 2, the contact force of the lips 16, 18 is increased in accordance with the pressure level, which tight contact is thus ensured, with only slight friction occurring when the band 3 moves between it and the sealing lip 16, depending on the pressure level. Only small frictional forces also occur on the guide elements 23, 24 which guide the belt in its desired position; the overall friction of the sealing and guiding members to the tapes 3, 4 is thus kept low. When lateral force components occur, the band 3 can be deflected against the elastic deformation forces for the sealing elements 12, 13 by the clearance 29, after reaching a maximum deflection by this clearance 29, the stop surfaces 28 and 29 of a guide element 23, 24 strike the wall 15 and formally support this guide element 23, 24 so that no further deflection can take place.

Die Fig.8 und 9 stellen Ausschnittvergrößerungen aus der Fig.4 entsprechend dem dortigen Kreis Y dar. Bei ebener Ausgestaltung der dem Band 3 zugewandten Flächen der Führungselemente 23,24 ergeben sich die aus Fig.8 ersichtlichen Verhältnisse, die Führungselemente 23 und 24 liegen, wie vorstehend beschrieben, auf den Breitseiten 17 des Bandes 3 mit elastischer Andrückung auf. In Abwandlung hierzu ist es gemäß Fig.9 jedoch auch möglich, die Führungselemente 23,24 jeweils bandseitig mit einer Aussparung 35 zu versehen, wie es aus Fig.9 ersichtlich ist. Die Tiefe der Aussparung 35 entspricht dabei zumindest der halben Stärke des Bandes 3, sie ist zweckmäßig um ein geringes Spielmaß größer, und die Breite der Aussparung 35 ist um ebenfalls ein Spielmaß größer als die Breite des Bandes 3. Hierdurch ergibt sich bei in ihren seitlichen Randbereichen aneinander anliegenden Führungselementen 23,24 in deren mittleren Bereich ein aus den Aussparungen 35 gebildeter Schlitz, der von dem Band 3 berührungsfrei zu den Führungselementen 23,24 durchsetzbar ist. Bei dieser Ausführungsform stützen sich die Führungselemente 23 und 24 gegenseitig ab, sie liegen also nicht am Band 3 auf und letzteres kann in seiner Sollage die Führungselemente 23,24 reibungsfrei durchsetzen. die Gesamtreibung der Bänder 3 und 4 des Arbeitszylinders wird hierdurch weiter gemindert.8 and 9 represent enlarged sections of FIG. 4 in accordance with the circle Y there. In the case of a flat configuration of the surfaces of the guide elements 23, 24 facing the band 3, the relationships shown in FIG. 8 result, the guide elements 23 and 24 being located , as described above, on the broad sides 17 of the band 3 with elastic pressure. 9, it is also possible to provide the guide elements 23, 24 with a recess 35 on the hinge side, as can be seen from FIG. The depth of the recess 35 corresponds to at least half the thickness of the band 3, it is expediently larger by a small amount of play, and the width of the recess 35 is also a game size larger than the width of the band 3 In the central region, edge areas adjoining one another have a slot formed from the recesses 35 which can be penetrated by the band 3 without contact to the guide elements 23, 24. In this embodiment, the guide elements 23 and 24 are supported against one another, ie they are not in contact with the belt 3 and the latter can pass the guide elements 23, 24 smoothly in its desired position. this further reduces the overall friction of the belts 3 and 4 of the working cylinder.

In weiterer Abänderung können die Dichtelemente unter Entfall der Lippen 16,18 als Kompaktdichtung ausgebildet werden, wobei jedoch zumeist eine höhere Reibung in Kauf genommen werden muß.In a further modification, the sealing elements can be formed as a compact seal, eliminating the lips 16, 18, but mostly a higher friction has to be accepted.

Claims (8)

  1. A working cylinder without a piston rod, with at least one band (3,4) connecting a piston (2) to a power output element (7), which band penetrates at least one cylinder cover (8,9), arranged on one end of a cylinder tube (1) accommodating the piston (2), in a sealed displaceable manner coaxially or axially parallel to the piston (2), wherein the cylinder cover (8,9) has a receiving chamber (10) penetrated by the band (3), which is wider than the band (3) and has laterally rounded ends, and in which are located two similar strip-like sealing elements (12,13) of elastic material pressed onto the two broad sides (17) of the band (3) with prestress by bearing on the wall (15) of the receiving chamber (10) and subsequently a band guide facing away from the pistons made of inherently stable material having a slit for the band passage, which is also able to be supported against the wall (15) of the receiving chamber (10), characterised in that the sealing elements (12,13) corresponding substantially in their outer contour (14) to the contour of the wall (15) of the receiving chamber (10) have on their sides facing away from the piston in each case a first groove (20) parallel to the broad side (17) of the band (3) and extending transverse to and open towards it, in that the band guide in the band plane is formed divided into two similar guide elements (23,24), wherein each guide element (23,24) has a web-like body (25) engaging the first groove (20), in that each sealing element (12,13) has in the central region of its longitudinal extent a second groove (21) emanating from the first groove (20) and extending to it at right angles and leading to the outer contour (14), in that each guide element (23,24) has a prolongation (27) engaging the second groove (21), which terminates with a clearance (29) before the wall (15) of the receiving chamber (10) with a stop face (28) and in that each guide element (23,24) has on the side of the prolongation (27) in each case a pin projection (31) extending parallel to the prolongation, likewise with the clearance (29) before the wall (15) of the receiving chamber (10) and terminating with a stop face (32), which attachment is located in a bore-like recess (22) of the sealing element (12,13).
  2. A working cylinder according to claim 1, characterised in that the sealing element (12,13) is made of elastomer and the guide element (23,24) of a material with a low friction coefficient, such as ceramics, PTFE or an ultra-high molecular weight low pressure polyethylene.
  3. A working cylinder according to claim 1 or 2, characterised in that the sealing element (12,13) is formed facing the piston as a lip seal, the one lip (16) of which rests on the broad side (17) of the band (3) and its other lip (18) on the wall (15) of the receiving chamber (10).
  4. A working cylinder according to claim 1,2 or 3, characterised in that the sealing element (12,13) has in both end regions of its longitudinal extent a respective pressure bead (19) on the outer contour side which rests with prestress on the wall (15) of the receiving chamber (10).
  5. A working cylinder according to claim 4, characterised in that the pressure beads (19) are triangular in cross-section and have a longitudinal extent extending substantially transverse to the band (3).
  6. A working cylinder according to one or several of the preceding claims 1 to 5, characterised in that the guide element (23,24) has a recess (35) on the band side, the depth of which is at least half the thickness of the band (3) and the length of which in the transverse direction of the band (3) is greater by a clearance amount than the width of the band.
  7. A working cylinder according to one or several of the preceding claims 1 to 6, characterised in that the prolongation (27) of the guide element (23,24) engaging the first groove (20) has a recess (30) on the aide of its stop face (28).
  8. A working cylinder according to one or several of the preceding claims 1 to 7, characterised in that the receiving chamber (10) is sealed on the side facing away from the piston by a cover (33) which is held in a releasable manner on the cylinder cover (8,9) and has a slit (34) penetrated by the band (3) with clearance on all sides.
EP90106762A 1989-05-05 1990-04-09 Working cylinder without piston rod Expired - Lifetime EP0395915B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90106762T ATE99774T1 (en) 1989-05-05 1990-04-09 RODLESS POWER CYLINDER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3914889A DE3914889A1 (en) 1989-05-05 1989-05-05 PISTONLESS WORK CYLINDER
DE3914889 1989-05-05

Publications (3)

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EP0395915A2 EP0395915A2 (en) 1990-11-07
EP0395915A3 EP0395915A3 (en) 1992-05-20
EP0395915B1 true EP0395915B1 (en) 1994-01-05

Family

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EP90106762A Expired - Lifetime EP0395915B1 (en) 1989-05-05 1990-04-09 Working cylinder without piston rod

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US (1) US5020421A (en)
EP (1) EP0395915B1 (en)
AT (1) ATE99774T1 (en)
DE (2) DE3914889A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4005244A1 (en) * 1990-02-20 1991-08-29 Goetze Ag LIP SEAL
DE4027636C2 (en) * 1990-08-31 1994-03-17 Airtec Pneumatic Gmbh Fluid powered rodless cylinder
DE4111887C2 (en) * 1991-04-09 1999-10-21 Mannesmann Ag Sealing of a pressure cylinder operated working cylinder
DE4139919C2 (en) * 1991-12-04 1994-01-20 Freudenberg Carl Fa Seal for a back and forth body
SE510396C2 (en) * 1992-10-08 1999-05-17 Ckd Corp Piston rodless cylinder
DE29505345U1 (en) * 1995-03-31 1995-05-18 Festo Kg, 73734 Esslingen Output element of a linear drive
DE19636270A1 (en) * 1996-09-06 1998-03-12 Star Gmbh Rail-assembly for linear guide
DE19636272A1 (en) * 1996-09-06 1998-03-12 Star Gmbh Linear guide device
US5868499A (en) * 1996-09-06 1999-02-09 Deutsche Star Gmbh Linear guiding unit
DE29621994U1 (en) * 1996-12-19 1998-04-16 Huss Maschfab Gmbh & Co Ride with height-adjustable passenger carriers
US6682754B2 (en) 1999-11-24 2004-01-27 Willmar Poultry Company, Inc. Ovo delivery of an immunogen containing implant

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1293037B (en) * 1961-08-23 1969-04-17 Berlin Heinz Conveyor device operated by gaseous or liquid propellant to generate reciprocating movements with a large stroke
AT364621B (en) * 1976-06-25 1981-11-10 Mirkovic Radivoje PISTON CYLINDER FOR MACHINES, PNEUMATIC AND HYDRAULIC DEVICES OR THE LIKE.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2666658A (en) * 1949-10-19 1954-01-19 Bendix Aviat Corp Motion transmittal and sealing means therefor
DE2404244A1 (en) * 1974-01-30 1975-08-07 Ahrendt & Birkendahl Ohg Working cylinder withoutt piton rod - has piston connected via tension element to external unit
US4057257A (en) * 1977-01-10 1977-11-08 Tol-O-Matic, Inc. Seal assembly
JPS59146636A (en) * 1983-02-12 1984-08-22 住友電気工業株式会社 Apparatus for bending cable by remote operation
US4526386A (en) * 1984-04-23 1985-07-02 Microdot Inc. Nested serpentine seal assembly
DE3505167A1 (en) * 1985-02-15 1986-08-28 GAS Gesellschaft für Antriebs- und Steuerungstechnik mbH & Co KG, 7742 St Georgen Linear drive
US4807890A (en) * 1985-10-15 1989-02-28 Esco Elevators, Inc. Sealing combination

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1293037B (en) * 1961-08-23 1969-04-17 Berlin Heinz Conveyor device operated by gaseous or liquid propellant to generate reciprocating movements with a large stroke
AT364621B (en) * 1976-06-25 1981-11-10 Mirkovic Radivoje PISTON CYLINDER FOR MACHINES, PNEUMATIC AND HYDRAULIC DEVICES OR THE LIKE.

Also Published As

Publication number Publication date
EP0395915A3 (en) 1992-05-20
US5020421A (en) 1991-06-04
DE59004082D1 (en) 1994-02-17
ATE99774T1 (en) 1994-01-15
DE3914889A1 (en) 1990-11-08
EP0395915A2 (en) 1990-11-07

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