EP2643125A1 - Dispositif de serrage électrohydraulique - Google Patents

Dispositif de serrage électrohydraulique

Info

Publication number
EP2643125A1
EP2643125A1 EP12778337.1A EP12778337A EP2643125A1 EP 2643125 A1 EP2643125 A1 EP 2643125A1 EP 12778337 A EP12778337 A EP 12778337A EP 2643125 A1 EP2643125 A1 EP 2643125A1
Authority
EP
European Patent Office
Prior art keywords
piston
pressure
chamber
pressing device
electro
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12778337.1A
Other languages
German (de)
English (en)
Other versions
EP2643125B1 (fr
Inventor
Volker Reichel
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.)
Novopress GmbH Pressen und Presswerkzeuge and Co KG
Original Assignee
Novopress GmbH Pressen und Presswerkzeuge and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Novopress GmbH Pressen und Presswerkzeuge and Co KG filed Critical Novopress GmbH Pressen und Presswerkzeuge and Co KG
Publication of EP2643125A1 publication Critical patent/EP2643125A1/fr
Application granted granted Critical
Publication of EP2643125B1 publication Critical patent/EP2643125B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/146—Clip clamping hand tools
    • 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
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/005—Hydraulic driving means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/042—Hand tools for crimping
    • H01R43/0428—Power-driven hand crimping tools

Definitions

  • the invention relates to an electro-hydraulic pressing device, in particular for producing pipe connections by means of press fittings and for producing crimp connections in electrical engineering.
  • Such a pressing device has, for example, two pliers-like pressing jaws. These are actuated by an electro-hydraulic drive.
  • a pressure piston is provided in a piston chamber, the pressure chamber is connected to the hydraulic pump.
  • the pressure piston is moved by pumping fluid into the pressure chamber.
  • the pressing jaws are closed, wherein the pressure piston possibly actuates the pressing jaws via a roller head.
  • so-called press loops are also known pliers-like pressing devices known. These have a plurality of articulated pressing jaws, which are wrapped, for example, around a press fitting to be pressed.
  • the opening of the press sling is connected to a pressing device, so that compression takes place by contraction of the press sling.
  • the pressing device used in this case is designed essentially in accordance with the pressing device described in DE 20 2004 000 215.
  • axial compression devices are also known in which pressure is also built up electrohydraulically in order to displace a pressure piston.
  • hydraulic fluid is delivered into the pressure chamber by the hydraulic pump. This results in a movement of the pressure piston and performing the compression.
  • In reliably performed pressing creates a shut-off at the end of the compression in the pressure chamber. When the switch-off pressure is reached, the injection process is automatically stopped. This is achieved by providing a pressure relief valve in the pressure piston.
  • a control valve In the hydraulic pump connecting to the pressure chamber flow channel, a control valve is also provided. Upon reaching the cut-off pressure decreases due to the opening of the pressure relief valve, the pressure in the pressure chamber and thus also in the connecting channel between the hydraulic pump and the pressure chamber. This leads to switching of the control valve, whereby a return flow is opened.
  • the return flow channel connects the pressure chamber with the fluid reservoir.
  • the control valve is constructed in such a way that during the injection process, fluid is pumped by the hydraulic pump through a narrow channel provided in the valve piston of the control valve. Upon reaching the cut-off pressure and thus decreasing the pressure in the pressure chamber, the spring-loaded valve piston of the control valve is displaced and releases the return flow channel.
  • the pushing back of the pressure piston in the starting position is effected by a return spring disposed in the pressure chamber.
  • a disadvantage of the pressing device described in DE 20 2004 000 215 is that in order to carry out the pressing operation, the hydraulic fluid from the hydraulic pump has to be pumped through the opening having a small cross-section in the control valve. This affects the efficiency. Furthermore, openings with a small cross section are susceptible to contamination.
  • an electro-hydraulic pressing device is known.
  • a needle valve is arranged in the return flow. This needle valve is opened upon reaching the cut-off, so that the hydraulic fluid is pushed back from the pressure chamber by means of the return spring in the reservoir.
  • the needle valve arranged in the return flow channel has a channel with a small cross section which is closed with the valve needle during the pressing process. Since a channel with a small cross-section is provided here as well, through which the fluid must be forced through, the efficiency of the pressing device described in DE 198 25 160 is low when the pressure piston is pressed back. Furthermore, there is also the disadvantage that the channel provided in the needle valve slightly contaminates with a small cross section.
  • the object of the invention is to provide an electro-hydraulic pressing device, which is particularly suitable for the production of pipe connections by means of press fittings, which has a good efficiency both when opening and closing the press jaws.
  • the electrohydraulic pressing device has a pressure piston acting on pressing jaws.
  • the pressure piston can act on pressing jaws directly or through intermediary elements, such as a roller head.
  • intermediary elements such as a roller head.
  • an indirect action the pressing jaws ie a closing of the press loop done.
  • Such electro-hydraulic pressing devices are particularly suitable for the production of pipe connections by means of press fittings, but also for crimping cable lugs and the like.
  • the pressure piston is arranged displaceably in a piston chamber, wherein the piston chamber is divided by the pressure piston in a pressure chamber and a rear space. Hydraulic fluid can be pumped from a reservoir into the pressure chamber with the aid of a hydraulic pump. As a result, the moving of the pressure piston, wherein the pressure in the pressure chamber increases with progressive compression takes place. In the pressure chamber opposite the rear space arranged a return spring is provided. This serves to push back the pressure piston in its initial position after pressing. In the pressure piston designed in particular as a needle valve pressure relief valve is arranged. Upon reaching a working pressure, which is achieved in the pressure chamber when the compression is completed, the pressure relief valve opens a connecting channel, which is arranged between the rear space and a piston interior. Here, the channel, as described in DE 20 2004 000 215, laterally past a valve piston of the pressure relief valve.
  • a balance piston is arranged in the piston interior.
  • the balance piston opens a connection opening to allow pushing back of the pressure piston after pressing into the starting position. Accordingly, the connection opening is closed by the balance piston when the pressure piston is moved from its initial position during the pressing operation.
  • the connection opening is arranged between the pressure chamber and the piston interior. Furthermore, the balance piston closes a return flow channel until reaching the cut-off pressure. Upon reaching the cut-off pressure, the balance piston is moved, whereby on the one hand the connection opening between the pressure chamber and Piston interior is opened and thereby also the return flow channel is opened.
  • the balance piston is thus arranged within the pressure piston and is moved together with the pressure piston during the compression process, during which no relative movement between the balance piston and the pressure piston takes place during the compression process. This takes place only when the cut-off pressure is reached. After the cut-off pressure has been reached and the balance piston has been displaced as a result, the pressure piston is pushed back into its starting position by the return spring. In this case, the fluid present in the pressure chamber flows through the connection opening into the return flow channel. Since the connecting channel is preferably arranged in the pressure piston, the fluid flows back through the pressure piston. Since the fluid flows directly into the pressure space during the compression process and no valve is arranged in the flow path, the pressing operation can be carried out by moving the pressure piston during the pressing operation with high efficiency.
  • the pushing back of the pressure piston with the return spring can be done with high efficiency, since the connection opening, which can be closed by the balance piston, must not be designed as a needle valve. As a result, problems with impurities are avoided or at least reduced.
  • the connecting piston which preferably has a relatively large cross-section, is opened by the balance piston, so that the working piston automatically returns to the rear end position or the starting position. This can be done very quickly due to the provision of a large cross-section of the connection opening.
  • a compression spring could be provided, which presses the balance piston in the direction of the connection opening during the Verpressvorvorgang for closing the same.
  • this spring can be omitted or at least be designed as a weak, purely supporting spring.
  • This is the piston interior is connected via a feed channel to the pressure chamber. Through this supply passage, fluid flows into the interior of the piston during the injection process onto the rear side of the balance piston and presses it into the connection opening or a valve seat surrounding the connection opening or against an edge of the connection opening. Since the supply channel is open during the entire pressing operation, the pressure on the back of the balance piston increases in accordance with the pressure rise in the pressure chamber. This has the consequence that the balance piston is pressed ever more firmly against the connection opening. As a result, in spite of the increase in the pressure in the pressure chamber, a displacement of the balance piston caused thereby and thus opening of the connection opening is avoided.
  • a support of the holding of the balance piston in a closed position by a spring arranged on the back of the balance piston can be completely eliminated, in particular, if the back of the balance piston has a pressure surface whose pressure-relevant cross-section is greater than the opening cross-section of the connection opening.
  • the force acting on the rear side of the balance piston is greater than the force acting on a front side of the balance piston closing the connection opening.
  • the pressing device is located at the beginning of a Verpressvorgangs, ie, before the pressure piston starts to move, an end face of the pressure piston to a sealing seat of the piston chamber.
  • This is the end face of the piston in which the connection opening is arranged.
  • the sealing seat surrounds the connection opening. Since the supply of hydraulic fluid to the pressure chamber outside of this sealing seat takes place in this embodiment, thus initially no or at most a small force acts on the surface of the balance piston occluding the connection opening. Rather, the pressure is initially increased on the back of the balance piston, so that the Libra piston is pressed into the connection opening.
  • the pressure piston starts to move and thus pressure is also built up on a front side of the balance piston, the force built up on the back side of the balance piston is already higher, so that unintentional displacement of the balance piston and thus opening of the connection opening is avoided.
  • the pressure piston has a head element arranged in the pressure chamber.
  • the balance piston is arranged completely or at least partially within the head element.
  • the head element is designed such that it at least partially does not bear against the inside of the pressure chamber. This has the consequence that the hydraulic fluid flowing into the pressure chamber, in particular at the beginning of the injection process, can flow past the head element and initially flows via the feed channel into the chamber provided behind the scale piston in order to exert a corresponding force on the rear side of the balance piston.
  • the head element is cylindrical according to the pressure chamber and has a smaller diameter than the pressure chamber, so that between the inside of the pressure chamber and the head member, an annular gap is formed.
  • the return flow channel is arranged such that it connects the pressure chamber with the rear space with open balance piston.
  • the return flow channel is therefore preferably provided in the pressure piston. In this way, in particular a compact design can be realized. It is also advantageous to direct the fluid flowing back into the reservoir when the piston is pushed back into the rear space, since the rear space is preferably connected to the reservoir anyway. This is necessary because fluid, which is located in the back space, is pushed out of the back space of the piston during the injection process. This is done by a particular provided in the housing of the pressing tool return or channel that connects the back space with the reservoir.
  • the closed during the Verpressvorgangs of the pressure relief valve connecting channel is preferably arranged in a partition between the piston interior and a valve chamber.
  • the pressure relief valve is thus preferably arranged within the pressure piston.
  • the valve space is in this case that space in which the piston of the pressure relief valve is arranged.
  • opening the connecting channel by moving the piston of the pressure relief valve this is moved into the valve chamber.
  • at least a small amount of fluid flows through the connecting channel into the valve chamber and preferably passes from the valve chamber into the rear chamber.
  • the fluid it is preferable for the fluid to flow past the piston of the overpressure valve laterally.
  • the piston may have corresponding longitudinally extending grooves or channels or be arranged with a correspondingly large clearance or space in this space.
  • connection channel upon reaching the cut-off pressure, a small amount of fluid flows through the connection channel, as this only the pressure in the interior must be reduced, so that moves the balance piston and the connection opening is opened. As soon as the connection opening is open, the medium flows back out of the pressure chamber via the return flow channel and preferably through the rear space into the reservoir.
  • the pressure relief valve is in a preferred embodiment, a needle valve, so that a connecting channel can be provided with a small diameter. This is not detrimental here, since only small amounts of fluid have to flow through the connecting channel and, as a result, neither the efficiency is worsened nor the danger of blockage exists.
  • the balance piston has a pressure surface whose pressure-effective cross section is greater than the opening cross section of the connection opening. Due to this difference surface, the balance piston also remains in the closed position during an interruption of the pressing process.
  • FIG. 1 shows a schematic plan view of a pressing tool
  • FIG. 2 shows a schematic longitudinal section through a pressing tool in a preferred embodiment
  • FIG. 4 shows a section of the pressure piston in a longitudinal section
  • FIG. 1 schematically shows the head region of a forceps-like pressing tool.
  • This has two pressing jaws 10, which are interconnected by a connecting element 12 and pivotable about bolts 14.
  • compression of press fittings or other components can take place.
  • the recesses 16 or slightly differently shaped recesses can be used to connect them to the free end of the press loop and then to use the pressing tool to contract a press loop.
  • the closing of the pressing jaws 10 takes place with the aid of a particular elektrohydrau cally driven pressure piston 18.
  • the pressure piston 18 is connected to a roller head 20.
  • the pressing jaws 10 can be inserted into a housing 26 of the pressing tool and fixed by a retaining pin 28 in this.
  • the pressing jaws 10 are thus replaceable, so that different pressing jaws can be operated with the same pressing tool.
  • the pressing tool is shown in longitudinal section, wherein the pressing jaws 10 are not inserted into the housing 26.
  • the piston 18 is arranged in a piston chamber 30, wherein the pressure piston 18 divides the piston chamber 30 in a pressure chamber 32 and a rear space 34.
  • the pressure chamber 32 is connected via a channel 36 with a hydraulic pump 38.
  • the hydraulic pump 38 delivers hydraulic fluid from a reservoir 40 through the channel 36 into the pressure chamber 32.
  • the hydraulic pump 38 is driven by means of a battery 42 and an intermediate gear 44.
  • the piston To divide the piston chamber 30 into the pressure chamber 32 and the pressure chamber 34, the piston has a plate-shaped projection 46, which is sealed in particular with the additional use of an annular sealing element 48 against an inner side 50 of the piston chamber 30.
  • the channel 36 is supplied with a supply of fluid into the pressure chamber 32, so that the pressure increases therein and is moved to perform a pressing operation of the piston 18 from the initial position shown in Figure 3 to the right. After the conclusion of the pressing operation, the pressure piston 18 is moved back through a return spring 52 arranged in the rear space 34.
  • a designed as a needle valve pressure relief valve 54 is disposed in the interior of the piston 18.
  • a valve piston 56 of the pressure relief valve 54 has a needle 58 which closes a connecting channel 60, as long as the cut-off pressure has not yet been reached.
  • the closing of the connecting channel 60 by means of a compression spring 62, the bias can be adjusted by a screw 64.
  • a balance piston 68 is arranged inside a head element 66, which is part of the piston 18.
  • the balance piston 68 is displaceable in a piston interior 70.
  • the balance piston 60 closes a connection opening 72 and a return flow channel 74 arranged in the head element 66 and in the piston 18.
  • the head element 66 has a sealing seat 76 on an end face of the head element 66 arranged in the pressure space 32.
  • the sealing seat 76 cooperates with an annular projection 78 provided on the inner side 50 of the pressure chamber 32, so that a seal surrounding the connecting opening 32 is formed.
  • a feed channel 80 is provided through which fluid passes from the pressure chamber 32 into the piston interior 70.
  • the fluid passing through the feed channel 80 into the inner space 70 causes a pressure build-up in the inner space 70, which is on a rear side 82 of the balance piston 68 exerts a force by which the balance piston 68 closes the connection opening 72.
  • connection channel 60 of the pressure relief valve 54 is connected to the inner space 70.
  • the rear space 34 is connected in the illustrated embodiment via two returns 84 to the reservoir 40.
  • connection opening 72 since a pressure is already built up in the interior 70, this does not lead to the displacement of the balance piston 68 inwardly and thus not to open the connection opening 72. Further, since the effective pressure surface on the back of the balance piston 68 is greater than the cross section of the connection opening the force acting in the direction of the connection opening 72 is greater than the counterforce generated by the pressure in the pressure space 32, so that the connection opening 72 remains closed during the entire closing and pressing process.
  • the opening of the relief valve 54 causes a pressure drop in the piston interior 70. This reduces the force acting on the back 82, so that the now much higher, prevailing in the pressure chamber 32 pressure shifts the balance piston into the interior of the head member 66. As a result, the connection opening 72 as well as the remindströmkanale 74 is opened. Thus, hydraulic fluid can flow from the pressure chamber 32 into the back space 34 through the communication port 72 and the return flow passages 74 disposed in the head member 66 and the piston 18, respectively.
  • the pressing device is ready for the next pressing operation.
  • the position of the balance piston 68 may not yet correspond to the position shown in FIG. 3. However, this is ensured because at the beginning of the next injection process first hydraulic oil flows through the supply line 80 into the interior 70.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Press Drives And Press Lines (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

L'invention concerne un dispositif de serrage électrohydraulique, qui convient notamment à la réalisation des assemblages de tubes au moyen de raccords de serrage et qui comporte un piston de pression (18) qui agit sur des mâchoires de serrage (10). Une chambre de piston de pression (30) est divisée par le piston de pression (18) en une chambre de pression (32) et une chambre de rappel (34). La chambre de pression (32) est reliée à une pompe hydraulique (38) pour l'admission d'un fluide hydraulique sortant d'un réservoir (40). Dans le piston (18) est agencé, en plus d'une soupape de surpression (54), un piston d'équilibrage (68). Jusqu'à l'obtention d'une pression d'arrêt, c'est-à-dire pendant tout le processus de serrage, le piston d'équilibrage (68) ferme une ouverture de liaison (72), ainsi qu'un conduit de reflux (74).
EP20120778337 2011-12-17 2012-10-24 Dispositif de serrage électrohydraulique Active EP2643125B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201120109251 DE202011109251U1 (de) 2011-12-17 2011-12-17 Elektrohydraulisches Pressgerät
PCT/EP2012/071040 WO2013087279A1 (fr) 2011-12-17 2012-10-24 Dispositif de serrage électrohydraulique

Publications (2)

Publication Number Publication Date
EP2643125A1 true EP2643125A1 (fr) 2013-10-02
EP2643125B1 EP2643125B1 (fr) 2014-05-14

Family

ID=47076235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20120778337 Active EP2643125B1 (fr) 2011-12-17 2012-10-24 Dispositif de serrage électrohydraulique

Country Status (5)

Country Link
US (1) US9216501B2 (fr)
EP (1) EP2643125B1 (fr)
AU (1) AU2012351079B2 (fr)
DE (1) DE202011109251U1 (fr)
WO (1) WO2013087279A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011109251U1 (de) 2011-12-17 2013-03-18 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Elektrohydraulisches Pressgerät
DE202015105803U1 (de) * 2015-11-02 2015-11-12 Fibro Gmbh Handpresse
CN108746414A (zh) * 2018-06-01 2018-11-06 怀宁县恒源再生科技有限公司 一种钢铁铸件折弯机
CN118060375B (zh) * 2024-04-24 2024-06-21 成都彩堂钣金有限公司 一种异形钢管下压式快速折弯装置及其折弯方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10216213A1 (de) * 2002-04-10 2003-10-23 Klauke Gmbh Gustav Elektrohydraulisches Verpressgerät und Verfahren zum Betreiben desselben
US5195354A (en) * 1989-03-31 1993-03-23 Japan Storage Battery Co., Ltd. Cam crank mechanism and motor driven hydraulic tool
DE19825160A1 (de) 1997-10-15 1999-04-22 Klauke Gmbh Gustav Hydraulisches Preßgerät und Verfahren zum Betreiben desselben
ES2172224T3 (es) * 1997-10-15 2002-09-16 Klauke Gmbh Gustav Aparato hidraulico para apretar a presion.
DE19944229B4 (de) * 1999-09-15 2016-07-28 Gustav Klauke Gmbh Hydraulisches Handpressgerät und auswechselbarer Gerätekopf hierfür
DE202004000215U1 (de) 2004-01-08 2004-04-01 Novopress Gmbh Pressen Und Presswerkzeuge & Co Kg Handgeführtes Preßgerät
DE102006003044B4 (de) * 2006-01-23 2015-10-08 Gustav Klauke Gmbh Hydraulisch angetriebenes Verpressgerät sowie Verfahren zum Verpressen eines Fittings
DE202006001889U1 (de) * 2006-02-03 2007-03-08 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Antriebseinheit für ein Preßgerät
DE102006026552A1 (de) * 2006-06-08 2007-12-13 Gustav Klauke Gmbh Verfahren zum Betreiben eines hydraulischen Verpressgerätes sowie hydraulisches Verpressgerät mit einer Hydraulikpumpe
US8074485B2 (en) * 2008-07-08 2011-12-13 Tyco Electronics Corporation Tool head assemblies for pressing devices
DE202011109251U1 (de) 2011-12-17 2013-03-18 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Elektrohydraulisches Pressgerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013087279A1 *

Also Published As

Publication number Publication date
EP2643125B1 (fr) 2014-05-14
AU2012351079A1 (en) 2014-07-03
US9216501B2 (en) 2015-12-22
WO2013087279A1 (fr) 2013-06-20
AU2012351079B2 (en) 2016-05-19
US20150000369A1 (en) 2015-01-01
DE202011109251U1 (de) 2013-03-18

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