EP3050673B1 - Spannvorrichtung - Google Patents

Spannvorrichtung Download PDF

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Publication number
EP3050673B1
EP3050673B1 EP15152789.2A EP15152789A EP3050673B1 EP 3050673 B1 EP3050673 B1 EP 3050673B1 EP 15152789 A EP15152789 A EP 15152789A EP 3050673 B1 EP3050673 B1 EP 3050673B1
Authority
EP
European Patent Office
Prior art keywords
locking means
arresting means
bracing device
bracing
output shaft
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.)
Active
Application number
EP15152789.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3050673A1 (de
Inventor
Luciano Migliori
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.)
Univer SpA
Original Assignee
Univer SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univer SpA filed Critical Univer SpA
Priority to ES15152789.2T priority Critical patent/ES2624441T3/es
Priority to EP15152789.2A priority patent/EP3050673B1/de
Priority to US15/004,041 priority patent/US9789589B2/en
Publication of EP3050673A1 publication Critical patent/EP3050673A1/de
Application granted granted Critical
Publication of EP3050673B1 publication Critical patent/EP3050673B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/16—Details, e.g. jaws, jaw attachments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/12—Arrangements for positively actuating jaws using toggle links
    • B25B5/122—Arrangements for positively actuating jaws using toggle links with fluid drive

Definitions

  • the invention relates to a clamping device according to the preamble of patent claim 1, in particular a Kniehebespannvorraum, primarily for use in the bodywork of the automotive industry.
  • tensioning devices for example toggle-type tensioning devices
  • Such tensioning devices are arranged not only horizontally but also under any spatial conditions.
  • it can for example Pressure drop, or when heavy loads are connected to the clamping arm, it happens that the clamping arm moves unintentionally in an unwanted position. This can cause damage, in the worst case even injuries.
  • a toggle lever device is for example from the EP 2 548 700 A1 known.
  • a tensioning device which comprises a housing and a pivotally driven shaft which is mounted in the housing.
  • This shaft can be moved back and forth by supplying pressure medium pressure, for example by compressed air to a cylinder of the clamping device or under supply of correspondingly manually applied force via a hand lever, between an open position and a closed position of a clamping arm of the clamping device.
  • the shaft is mounted in the housing and led out of this on the opposite sides of the housing.
  • the ends of the shaft are formed as form-fitting parts, which have a square cross-section.
  • the clamping arm arranged outside the housing has two legs which receive clamping jaws in the region of their ends.
  • the tensioning device has a first locking means, which is mounted in one of the clamping jaws and is pivotable together with the shaft, furthermore a second locking means which is arranged in the pivoting path of the first locking means and mounted in the housing.
  • the two locking means act releasably together in a defined pivot position of the clamping arm.
  • the first locking means has a fixedly connected to the jaws locking segment and a locking pin connected thereto.
  • the locking bolt can be arranged with respect to the locking segment in several different angular positions with respect to the pivot axis of the clamping arm, for example at an opening angle of 45 °, starting every 15 °, to 135 °. According to these selectable positions of the locking bolt the locking segment is provided with blind holes.
  • the second arresting means has a U-shaped spring mounted in the housing, specifically mounted in a separate component which is connected to the housing.
  • a tensioning device which is formed according to the features of the preamble of claim 1 is known from EP 2 821 181 A1 known.
  • This has a pivotally mounted in a housing of the clamping device clamping arm, a first locking means which is pivotable according to the pivotal movement of the clamping arm, and a second locking means which is arranged in the pivoting path of the first locking means and mounted in the housing, on, wherein the two locking means in cooperate an end position of the clamping arm.
  • the first locking means has in the region of its end, which faces away from the pivot axis of the first locking means, on the second locking means side facing a recess which is laterally bounded by two projections.
  • the second locking means contacted during the pivoting of the clamping arm in its end position, the projections and is retracted in the end position in the recess.
  • the first locking means has a first portion receiving the one first projection and a second portion receiving the second projection.
  • Two rollers of the first locking means cooperate with a coil spring of the second locking means.
  • the axis of the coil spring is arranged parallel to the pivot axes of the rollers. The rollers contact when panning the first locking means, the coil spring and deform it radially. In the defined pivot position, the rollers engage behind the coil springs.
  • a clamping device is known with a device for locking a clamping arm in an unclamped state, wherein a roller element is mounted in a locking plate which is pressed under the action of the biasing force of a spring element against an engagement portion of a linearly movable joint block.
  • Object of the present invention is to ensure a low-wear interaction of the two locking means for secure locking of the clamping arm in the locking position of the two locking means.
  • the two sections of the first locking means upon action of the second locking means on the two projections, against a spring force, upon enlargement of the distance of the projections to each other, are movable.
  • the first locking means has two sections which are movable relative to one another during the enlargement of the spacing of the projections of the first locking means. Accordingly, if the first locking means is pivoted against the stationary housing-fixed second locking means, the two projections of the first locking means contact the second locking means, which acts on the two projections in such a way that the two sections of the first locking means are moved slightly away from each other against the spring force. As a result of this relative mobility of the two sections of the first locking means relative to one another, the projections can be guided past the second locking means with reduced force.
  • This design of the clamping device ensures a secure locking of the clamping arm in the locking position of the two locking means and also a low-wear interaction of the two locking means due to the spring force mutually movable projections or portions of the first locking means.
  • This advantageous mode of action is also given when transferring the tensioning device from the locking position; In this case, the first locking means is moved back from the locking position with the second locking means.
  • the movement of the two portions of the first locking means to increase the distance of the projections to each other, may be different.
  • it is a rotational movement of the two sections to each other or a rectilinear movement of the two sections to each other.
  • the two projections of the first locking means may form a structural unit with the respective first or second section, wherein the respective projection in the first section or second section is formed as a protrusion of this section.
  • the two projections are formed as rollers, in particular as rotatably mounted rollers. When using rotatable rollers contact these rollers of the first locking means in bringing the locking the second locking means and roll on this. This contributes sustainably to a further improvement of the interaction of the two locking means in terms of wear reduction.
  • the roles can be designed differently. Preferred is a design of the respective role as a cylindrical roller.
  • the two sections of the first locking means are pivotally connected to each other.
  • the one section is thus in particular non-rotatably connected to a pivotally drivable shaft of the tensioning device, which also rotatably receives the clamping arm, while the other portion is pivotally mounted in the first-mentioned section.
  • the first locking means in a lever in particular a one-armed lever, is formed, which has the two sections, in particular formed by the two sections. This results in a structurally particularly simple design of the first locking means.
  • the first locking means is rotatably connected to a housing mounted in the output shaft of the tensioning device, said with this output shaft of the Clamping arm is rotatably connected. It is provided according to a development that the first section is rotatably connected to the output shaft and in the region of the output shaft facing away from the end of a roller, in particular rotatable roller, whose bearing axis is arranged parallel to the bearing axis of the output shaft.
  • a particularly favorable storage and favorable power transmission of the two sections of the first locking means is to be noted when the first portion between the output shaft and the one projection pivotally receives the second portion, wherein the pivot axis of the second portion in the first portion parallel to the pivot axis of the output shaft is arranged.
  • This design also requires a simple kinematic interaction of the components of the first locking means and also of the first locking means and the second locking means.
  • the two portions of the first locking means at a distance from the pivot axis, by means of a fastening means under the action of the spring force, which is effective against the force of the fastening means connected.
  • the two sections in a position of the two locking means, in which they do not cooperate, abut each other.
  • the two sections are adjacent to each other.
  • the two sections are moved apart, against the spring force, thus are no longer together. This increases the distance between the projections to each other.
  • the projections Upon reaching the locking position, the projections are moved back toward each other, so that in this locking position, the two sections preferably abut again.
  • the two sections are on pivoting back of the first locking means from the locking position to each other or are only then together again when the first locking means has come out of contact with the second locking means.
  • the fastening element is designed as a screw, wherein the screw passes through a hole in the one section and is screwed into a threaded bore of the other section, wherein a spring is arranged between a screw head and the section associated therewith.
  • This spring is preferably formed as a plate spring, in particular as a plate spring package.
  • the second portion of the first locking means is designed so that it is designed as an L-shaped lever.
  • the L-shaped lever in the region of the free end of the long leg of the L is pivotally mounted in the first section and receives in the region of the free end of the short leg of the L, the second roller, in particular rotatable, wherein the bearing axis of the second roller in parallel to the bearing axis of the first roller, which is mounted in the first section is arranged.
  • the second locking means also has a roller which is mounted in an axis which is arranged parallel to the pivot axis of the clamping arm. Also in this role is preferably a rotatable roller having the cylindrical shape. This cylindrical shape can also be generated by a coil spring.
  • the rollers of the first locking means are formed as solid rollers and the role of the second locking means is formed by at least one coil spring, wherein the coil spring is mounted in a bearing pin, which is connected to the housing. Ensures the formation of the coil spring that upon contact of the two locking means, the coil spring can yield slightly, and thus under the action of the two projections or rollers of the deformed first locking means. This contributes to the reduction of wear in the field of locking sustainable.
  • the tensioning device allows to adjust the force of the locking system. If only a relatively small pivoting moment is introduced via the tensioning arm in the locking position of the locking means, it is sufficient to dimension the locking force or the locking moment of the cooperating locking means to be smaller. At high, initiated by the clamping arm moment a correspondingly higher locking torque is provided. Depending on the moment, the force of the locking system can be adjusted. The greater the force or torque, the greater the force must be to compress or unlock the spring of the first locking means. If the clamping arm is less stressed, the locking force or locking torque can be reduced by reducing the spring force of the spring of the first locking means and it is thus also the force or the moment to transfer the locking means in the locked position automatically or manually, lower.
  • tensioning device 1 Illustrated is a tensioning device 1, which is used in particular in the bodywork of the automotive industry.
  • This tensioning device is, in terms of their principle of operation in a known manner as toggle lever clamping device, as for example in the EP 2 548 700 A1 is described.
  • the clamping device has a two-sided pneumatically actuated piston for pivoting a both ends led out of a housing 2 of the tensioning device 1 shaft 44 about an axis 3 in opposite directions Directions on, with the shaft 44 rotatably a clamping arm 4 is connected.
  • the piston acts on this shaft 44 via a toggle lever.
  • the stroke of the piston is variable in length, changeable, for example, by changing the length of a piston rod between the piston and toggle, so that thereby at a defined closing angle, thus invariable closing position of the clamping arm 4, the opening angle, thus changing its open position. This can be seen in particular against the background that structural conditions in the region of the tensioning device 1 only allow a certain opening angle of the tensioning arm 4.
  • the shaft 44 which is axially fixed in the housing 2, but pivotally mounted, is led out on the opposite sides of the housing 2 from this.
  • the ends of the shaft 44 are formed as form-fitting parts. Specifically, the respective shaft end has a square cross-section, with bevelled corners.
  • the arranged outside the housing 2 clamping arm 4 has a U-shaped portion 5 with two legs 6 and a connecting web 7, further connected to the web 7, away from the portion 5 approach 8, which is provided with various holes 9. In this area of the attachment 8, a tool or the like can be connected to the clamping arm 4, thus a component which quite well has a relatively large weight.
  • the respective leg 6 has, in the region of its end facing away from the web 7, a rectangular recess 45, in the region of which the leg 6 cooperates positively with two adjacent sides of the associated end of the shaft 44.
  • jaws are provided corresponding to the recess of the respective leg 6 have a rectangular recess, so that the jaws in the region of these recesses in operative connection can be brought with the other two sides of the respective shaft end.
  • the respective jaws has holes in the region of opposite ends on, enforce the screws, which are screwed into threaded holes, both sides of the shaft end in the associated legs 6 of the clamping arm 4. In this way, a rotationally fixed connection between the clamping arm 4 and the two protruding from the housing 2 ends of the shaft 44 is ensured.
  • the clamping device 1 described so far is known from the prior art.
  • This clamping device 1 is provided with a special lock for locking the clamping arm 4 in a respectively desired, predetermined opening position of the clamping arm 4.
  • the lock ensures that the clamping arm 4 can not pivot unintentionally out of the locked, open position.
  • the clamping device 1 is designed such that either on one side of the housing 2, this locking can be attached, or on the side facing away from this side of the housing 2 side of the housing 2. Based on the embodiment shown is in the region of one side of the housing. 2 a first locking means 13 and a second locking means 14 are positioned. In order to be able to receive the first locking means 13, the clamping jaws which are usually used on one side or on the other side of the housing 2 are modified, that is to say the conventional clamping jaw is dismounted from the associated leg 6 of the tensioning arm 4 and the modified clamping jaw 10 instead screwed with this leg 6. The design of this jaw 10 results in particular from the illustration of Fig. 5 . 6 and 9 ,
  • the clamping jaw 10 is formed by a rotationally symmetrical body 15, a frontally connected thereto plate 16 and a jaw part 17.
  • the jaw part 17 has, according to the training of the commonly used clamping jaw, a rectangular recess 11 for positive connection with the two free sides of the shaft end on, thus those sides on which the leg 6 is not applied.
  • the plate 16 is the connecting part of the jaw part 17 and body 15.
  • the jaw part 17 is provided in a conventional manner, thus as the jaws commonly used with two holes 12 for inserting screws 46 which are screwed into threaded holes of this jaws 10 facing leg 6 of the clamping arm 4 to the rotationally fixed connection Arrangement of clamping arm 4 and jaws 10 with this jaw 10 associated shaft end to accomplish.
  • the body 15 represents the receptacle for the first locking means 13.
  • the first locking means 13 is connected to the jaws 10 in the region of the rotationally symmetrical body 15.
  • the rotationally symmetrical body 15 is provided radially outwardly over its circumference with a profile 18 which is trapezoidal in cross-section.
  • the first locking means 13 has a lever 19 and a clamping jaw 20.
  • the jaw 20 is mounted in the region of one end in an axis 21 which passes through the lever 19. In the region of the end facing away from the axis 21 of the jaws 20 by means of a screw 22 with the lever 19 is connected, which is screwed into a threaded bore of the lever 19 for this purpose.
  • the jaw 20 is formed as a first half of a connecting clamp and the lever 19 in its clamping jaw 20 facing region designed such that it has the function of the second half of the connecting clamp. In the area of the screw 22, the clamping jaw 20 is detachably connected to the lever 19.
  • the lever 19 and the jaws 20 have a corresponding profile 18 of the body 15 designed, negative profile, so that the first locking means 13 rotatably with the Jaws 10 can be connected. If the first locking means 13 loosely attached to the jaws 10, the lever 19 can be arranged in any angular position to the jaws 10 due to the interaction of rotationally symmetrical body 15 and the arrangement of lever 19 and jaws 20. Only then, when the desired angular position is set, the screw 22 is tightened and thus the rotatable connection between the first locking means 13 and jaws 10, thus first locking means 13 and shaft and consequently the tensioning arm 4 accomplished. The jaw 20 and the screw 22 Thus, means for fixing the first locking means 13 with respect to the receptacle, which is formed by the body 15, is.
  • the first locking means 13 has in the region of its end facing away from the axis 3, a locking device 23. This can be brought into operative connection with the second locking means 14.
  • the formation of the first locking means 13 is for example in the Fig. 7 illustrated.
  • These rollers 25 are rotatably mounted in axes 26 which are arranged parallel to the axis 3.
  • the rollers 25 are designed as cylindrical rollers and have identical diameter.
  • the first locking means 13 has a first portion 28 which receives a roller 25 and a second portion 29 which receives the other roller 25 on.
  • the two sections 28, 29 are, upon action of the second locking means 14 on the two rollers 25, against a spring force with increasing the distance of the rollers 25 to each other movable.
  • the two sections 28, 29 are pivotally connected to each other by means of an axis 30.
  • the axis 30 is arranged parallel to the axes 26.
  • the section 28 is rotatable connected to the jaws 10 and has, in the region of the axis 3 remote from the end, the roller 25. Between the axis 3 and the roller 25 of the portion 28, the portion 28 receives the portion 29 pivotally.
  • the two sections 28 and 29 are at a distance from the pivot axis 30 by means of a fastening means which is designed as a screw 31, under the action of the spring force, which is effective against the force of the screw 31, connected.
  • a fastening means which is designed as a screw 31, under the action of the spring force, which is effective against the force of the screw 31, connected.
  • the two sections 28, 29, in a position of the two locking means 13, 14, in which they do not interact, to each other, as in Fig. 7 is illustrated.
  • the screw 31 passes through a hole 32 in the section 29 and is screwed into a threaded bore 33 of the other section 28.
  • a designed as a plate spring packet 35 spring is arranged between the screw head 34 and the associated portion 29 a designed as a plate spring packet 35 spring is arranged.
  • the section 29 is formed as an L-shaped lever. This lever is pivotally mounted in the region of the free end of the long leg 36 by means of the axis 30 in the section 28 and receives in the region of the free end of the short leg 37 of the L the other roller 25.
  • the lying in the pivot angle of the first locking means 13 second locking means 14 has, as in particular the representation of Fig. 1 and 10 can be seen, a connected to the housing 2 bearing pin 38.
  • the axis 27 of the bearing pin 38 is, as described above, on a pitch circle with the effective radius of the first locking means 13 about the axis 3.
  • the axis 27 of the bearing pin 38 is arranged parallel to the axis 3.
  • the bearing pin 38 passes through two identically formed cylindrical helical compression springs 39, 40, which are arranged screwed into one another. This spring assembly formed by the two coil springs 39, 40 is supported on the bearing pin 38 and is clamped by means of a screw 41 screwed into the bearing pin 38.
  • the helical compression spring 39, 40 are thus fixed axially.
  • the portion 29 of the lever 19 can pivot slightly about the axis 30 with respect to the portion 28 of the lever 19 against the set spring force of the plate spring package 35, so that the distance the rollers 25 slightly increased and therefore the rollers 25 at relatively low pressure on the coil compression springs 39, 40 and thus relatively small deformation of these helical compression springs, along the helical compression springs 39, 40 can roll.
  • This middle position or intermediate position of the first locking means 13 is in the FIGS. 14 and 15 illustrated. Consequently, the lever 19, without it requires the introduction of a fairly high torque in the lever 19, be further pivoted in the in the FIGS. 16 and 17 illustrated end position of the first locking means 13 and thus end position of the tensioning arm 4.
  • the plate spring packet 35 has the section 29 pressed against the section 28 again, as it Fig. 7 is illustrated and it is in this end position according to the FIGS. 16 and 17 of the first locking means 13, the two locking means 13, 14 arranged in an over-center position to each other.
  • the distance of the rollers 25 is again slightly smaller than the diameter of the helical compression springs 39, 40th
  • the lever 19 can only be moved out when acting on the lever 19, an increased force or an increased torque or which is greater than a moment, via the clamping arm 4, possibly taking into account a connected to the clamping arm 4 load on which the shaft and thus the first locking means 13 acts.
  • the first locking means 13 can be moved into the locking position and pneumatically by applying the cylinder or, in particular, manually.
  • the toggle lever of the tensioning device 1 and thus the shaft of the tensioning device 1 is also pivotable externally by means of a hand lever 43.
  • a shaft is arranged on both sides of the housing 2, parallel to the pivot axis 3 of the shaft, with the shaft end of the latter shaft, which protrudes on the first locking means 13 side facing away from the housing 2, the hand lever 43 is rotatably connected. By pivoting the hand lever 43 and thus pivoting this shaft, the lever 19 of the first locking means 13 can pivot.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Clamps And Clips (AREA)
  • Surgical Instruments (AREA)
EP15152789.2A 2015-01-28 2015-01-28 Spannvorrichtung Active EP3050673B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES15152789.2T ES2624441T3 (es) 2015-01-28 2015-01-28 Dispositivo de sujeción
EP15152789.2A EP3050673B1 (de) 2015-01-28 2015-01-28 Spannvorrichtung
US15/004,041 US9789589B2 (en) 2015-01-28 2016-01-22 Clamping device having a first locking mechanism with a first projection and a second projection in communication with a second locking mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15152789.2A EP3050673B1 (de) 2015-01-28 2015-01-28 Spannvorrichtung

Publications (2)

Publication Number Publication Date
EP3050673A1 EP3050673A1 (de) 2016-08-03
EP3050673B1 true EP3050673B1 (de) 2017-03-01

Family

ID=52423614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15152789.2A Active EP3050673B1 (de) 2015-01-28 2015-01-28 Spannvorrichtung

Country Status (3)

Country Link
US (1) US9789589B2 (es)
EP (1) EP3050673B1 (es)
ES (1) ES2624441T3 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202019100296U1 (de) 2019-01-18 2020-04-23 ALTRATEC Automation GmbH Spannvorrichtung, insbesondere zum Spannen von Werkstücken
DE102019129676A1 (de) * 2019-11-04 2021-05-06 Andreas Maier Gmbh & Co. Kg Spannvorrichtung zum Einspannen eines Werkstücks
US11759915B2 (en) 2021-10-03 2023-09-19 Delaware Capital Formation, Inc. Pneumatic latch clamp

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US3027155A (en) * 1958-12-23 1962-03-27 Transfer Tools Ltd Means for releasably clamping articles
US4576367A (en) * 1985-01-02 1986-03-18 Aladdin Engineering & Mfg. Co. Pneumatic mechanical clamp including locking means
DE29817335U1 (de) 1998-09-26 1999-02-18 Tünkers Maschinenbau GmbH, 40880 Ratingen Spannvorrichtung, insbesondere Kniehebelspannvorrichtung, vornehmlich zur Verwendung im Karosseriebau der Kfz-Industrie
TW487617B (en) * 2000-08-04 2002-05-21 Smc Kk Clamp apparatus
JP3602433B2 (ja) * 2000-11-27 2004-12-15 Ｓｍｃ株式会社 クランプ装置
US7229068B2 (en) * 2004-03-05 2007-06-12 Phd, Inc. Vane clamp assembly
ITMI20050087U1 (it) * 2005-03-17 2006-09-18 Univer Spa Dispositivo di bloccaggio per pezzi da lavorare con organo di bloccaggio a forma di gancio
US8561973B2 (en) * 2009-01-20 2013-10-22 Delaware Capital Formation, Inc. Pull action clamp with toggle lock
DE102010046190B4 (de) * 2010-09-23 2019-02-21 Destaco Europe Gmbh Zentrierspannvorrichtung mit im Gehäuse elastisch gelagertem Hebelelement
EP2548700B1 (de) 2011-07-20 2014-06-25 UNIVER S.p.A. Pneumatisch betriebenes Arbeitsgerät
EP2821181B1 (de) * 2013-07-02 2015-03-04 UNIVER S.p.A. Spannvorrichtung

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
US9789589B2 (en) 2017-10-17
EP3050673A1 (de) 2016-08-03
US20160214236A1 (en) 2016-07-28
ES2624441T3 (es) 2017-07-14

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