EP0984170A2 - Cylindre à pression fluidique, soupape de commutation et unité de travail entraínée par pression - Google Patents

Cylindre à pression fluidique, soupape de commutation et unité de travail entraínée par pression Download PDF

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Publication number
EP0984170A2
EP0984170A2 EP99890249A EP99890249A EP0984170A2 EP 0984170 A2 EP0984170 A2 EP 0984170A2 EP 99890249 A EP99890249 A EP 99890249A EP 99890249 A EP99890249 A EP 99890249A EP 0984170 A2 EP0984170 A2 EP 0984170A2
Authority
EP
European Patent Office
Prior art keywords
valve
cylinder
working
pressure
control
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
EP99890249A
Other languages
German (de)
English (en)
Other versions
EP0984170A3 (fr
EP0984170B1 (fr
Inventor
Alfredo Hellemann
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.)
Hygrama AG
Original Assignee
Hygrama AG
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 Hygrama AG filed Critical Hygrama AG
Publication of EP0984170A2 publication Critical patent/EP0984170A2/fr
Publication of EP0984170A3 publication Critical patent/EP0984170A3/fr
Application granted granted Critical
Publication of EP0984170B1 publication Critical patent/EP0984170B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • 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
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0405—Valve members; Fluid interconnections therefor for seat valves, i.e. poppet valves
    • 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
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1433—End caps
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3052—Shuttle valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/885—Control specific to the type of fluid, e.g. specific to magnetorheological fluid
    • F15B2211/8855—Compressible fluids, e.g. specific to pneumatics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86847—Pivoted valve unit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87193—Pilot-actuated
    • Y10T137/87201—Common to plural valve motor chambers

Definitions

  • the invention relates to a pressure cylinder with a through Cylinder tube, at least one of the end pieces and a piston defined Work space, at least one supply opening for working medium to this Work space and a drain opening for the working medium from this work space, a valve, in particular for controlling such a pressure medium cylinder, with at least one input and at least one output for one Working medium and at least one control connection, or a switch valve, especially for controlling a double-acting pressure medium cylinder, with at least one connection and at least two outputs for a working medium as well as at least one control connection, as well as a work unit, comprising at least one pressure source for the working medium, at least one at most double-acting pressure medium cylinder, at least one valve for controllable supply of the working cylinder with working medium and at least a line for the working medium from the valve to the working cylinder.
  • the object of the present invention is therefore elements for a pressure-operated work unit and such an improved To create work unit itself, at least with a smaller size of the valve is reached, the existing space, especially in the cylinder better exploited and the performance of the individual elements better and can be coordinated more efficiently.
  • the Valve itself can be omitted for the exhaust or ventilation control necessary components can be reduced.
  • the supply and discharge of the working medium is advantageous provided that the feed channel has a smaller cross section than that Passage to the drain opening.
  • Pneumatic systems can be advantageous and structurally very simple also the requirements of noise protection or hydraulic systems Flow phenomena are taken into account when the drain opening Throttle element and / or silencer is connected downstream.
  • the valve formed by a freely movable sealing element covering the passage, that at least partially covers the feed channel. So that is easier and the function of the ventilation control mentioned above is very reliable depending on the ventilation or the outflow of the working medium depending on the pressurization of the working area of the cylinder realizable.
  • the design of the working cylinder according to the invention is particularly advantageous, if it is designed as a double-acting cylinder, preferably at least functionally the same on both sides and on each Page is constructed in accordance with at least one of the preceding paragraphs because then the benefits mentioned are carried twice, for each side come.
  • valve described at the outset which is particularly suitable for actuation of a pneumatic working cylinder according to the invention is intended, according to a further feature of the invention characterized by a drain channel for the working medium, starting from a position between the locking element of the valve and the at least one output, wherein in this drain channel outlet or switchable by the pressure at the control connection Vent control valve is provided.
  • This channel can be in the valve housing itself or one of the elements present in the valve and does not lead to an increase in its dimensions. The valve must therefore only be so large that the absolutely necessary connections and Controls are housed so that by this function optimization the smallest possible size is achieved.
  • a Switch valve provided as described in the introduction, characterized by each at least one drain channel from a position between the valve element and each output, with in each drain channel at least one by the Control connection applied pressure switchable outlet or vent control valve is provided.
  • a Rocker valve designed with a switch valve through which on the control connection applied pressure switchable between two switch positions Rocker sealing element provided that the outlet or vent control valve via at least one device for transmitting the at the control connection applied pressure is in operative connection with the control room.
  • a pneumatic work unit comprises at least one Pressure source for the working medium, at least one pneumatic working cylinder, at least one valve for the controllable supply of the working cylinder with working medium and at least one line for the working medium from Valve to the working cylinder, and is for the function-optimized design of the individual elements, the better use of space and component reduction or.
  • Reduction and better performance tuning of the elements characterized in that only one line per working space of the cylinder provided for the working medium to the cylinder and the lines over at least a controllable outlet or vent valve can be vented or relieved are that the working cylinder according to at least one of the above paragraphs trained and its drain opening is kept clear.
  • the work unit is characterized by a valve arrangement a drain channel for the working medium, starting from a position between the blocking element of the valve and the at least one output, wherein in this drain channel is switchable by the pressure applied to the control connection Exhaust or vent control valve is provided.
  • the pneumatic work unit with the at least one double-acting, pneumatic cylinder is according to an advantageous embodiment characterized in that per working space of the cylinder only ever a line for the working medium to the cylinder provided that the working cylinder according to at least one of the paragraphs based on it and that a Switch valve arrangement according to at least one of the above, placed thereon Paragraphs is provided.
  • a control logic arrangement is provided, the connections for communication, preferably a fieldbus, electrical control and supply and for that Has working medium.
  • Valve for controlling one or both working areas of the working cylinder directly attached to it or integrated into it, preferably in one of the two end pieces of this cylinder.
  • the or each vent control valve can advantageously attached to the working cylinder and / or the switch valve or in this be structurally integrated.
  • the result is as far as possible Simplification in assembly and arrangement at the installation site.
  • connection and sealing points omitted, which on the one hand, the arrangement of the overall system is essential simplified and its functional reliability - due to the lower risk of Leakages - can be increased significantly.
  • the options just mentioned are also in the design of the switch valve in rocker valve design advantageously applicable.
  • Fig. 1 shows a longitudinal section through an inventive Working cylinder
  • Fig. 2 is a partial cross-sectional view of a switch valve according to the invention with integrated ventilation control valves
  • Fig. 3 shows a possible embodiment of the integrated in the switch valve Vent control valves
  • Figures 4 and 5 are schematic circuit diagrams of pneumatic working units according to the invention
  • Fig. 6 sets Switch valve in rocker valve design together with the associated bleed control valves
  • Fig. 7 is a switch valve in rocker valve design with integrated vent control valves.
  • the pneumatic working cylinder A shown in Fig. 1 preferably actuated with compressed air as the working medium, consists of a cylinder tube 1, the ends of which are closed by a base 2 and a cover 3.
  • a piston is displaceable by this working cylinder A through the working medium 4 out, which via a piston rod 5, which is sealed by the cover 3 is passed, the mechanical force on the element to be driven transmits.
  • the invention is based on in the same way rodless cylinders and working media other than compressed air applicable, for example also on hydraulic working media.
  • a first working space 6 defined and between the Cover 3 and the piston 4, a second working space 7, depending on the exposure with the working medium and the vent in the direction of movement of the piston 4 located work space a vented counter chamber represents the current working space under pressure.
  • the compressed air is the work spaces via connections 8a, 8b, which into the feed openings 9a, 9b are used, supplied, with them through the supply channels 10a, 10b relatively small cross-section reaches the work rooms 6, 7.
  • Parallel to These feed channels 10a, 10b each have one of the feed openings 9a, 9b Passage 11a, 11b out, leading to two discharge openings 12a, 12b for the air the work rooms 6, 7 leads.
  • the mouth of the passage 11a, 11b lying in the feed opening 9a, 9b forms a valve seat for a located in the feed opening 9a, 9b preferably flat valve element 13a, 13b that completely this mouth covered and advantageously also the mouth of the parallel Feed channels 10a, 10b to work space 6 and 7, at least partially covered.
  • in compressed air is supplied to the drawing 8a on the right thereby pressing the right valve element 13a onto its seat and sealing the Passage 11a to the right drain opening 12a.
  • the compressed air arrives on Valve element 13a past into the feed channel 10a and further into the work area 6. This causes the piston 4 to move to the left and the Piston rod 5 extends.
  • valve V With such a working cylinder A with integrated pressure relief or. Venting can be done with valve V, for example in the version of Fig. 2, the vent valve arrangement avoided and the size accordingly be made smaller.
  • Valve element 15 In the housing 14 of the valve V is the real thing Valve element 15 slidably mounted, which valve element 15 in itself known way a compressed air connection 16 alternately with the two Working connections 17a and 17b connects which working connections 17a, 17b via pressure lines and the connections 8a and 8b on the working cylinder A thereof Supply working rooms 6 and 7 with compressed air.
  • the valve element 15 acted upon by a control pressure, which via the control connections 18th is initiated.
  • a drain channel 19 be provided from a position between the corresponding output 17a, 17b of the valve V and the actual valve element 15 to a drain opening 19a leads into the atmosphere.
  • This drain channel 19 is through a Valve element 20 closed as long as the associated outlet with the compressed air source connected is.
  • the valve element 20 of its valve piston 20 Lifted the seat and gives the connection from the drain channel 19 through the drain opening 19a released into the atmosphere.
  • the pressure line is then depressurized and in the working cylinder A, the valve element 13a, 13b by the from the previously lifted with compressed air and the corresponding Ventilated work area.
  • vent control valves 24 can also by separate vent control valves 24, as shown in FIG Fig. 4 is shown, the working air lines by solid lines and the control air lines are symbolized by dashed lines.
  • the pneumatic working unit shown here is the compressed air source 25 connected to the working cylinder A via a switch valve V.
  • the working cylinder A has two vent valves 27a and 27b, for example as in FIG 1, integrated.
  • the control air lines 28a, 28b lead both to the switch valve V and also to the two vent control valves 24a, 24b, the drain lines in block or release the compressed air lines 29a and 29b to the working cylinder A. If, for example, the right control air line 28a with the control pressure is applied, the switch valve V gives the compressed air connection to right working space 6 of working cylinder A free. At the same time, since the Pilot pressure in parallel to this also on the right ventilation control valve 24a is placed in a position in which the connection of the left compressed air line 29b released to the atmosphere and this line is therefore depressurized. The vent valve 27b is thus also released and the left work space 7 can be vented to the atmosphere. The left bleed control valve 24b is in because there is no pilot pressure the closed position.
  • a single vent control valve 30 may also be provided, whose two inputs each with one of the two pressure lines 29a and 29b are connected and its exit leads into the atmosphere.
  • the bleed control valve 30 is, for example, a conventional 3/2-way valve, as well like the switch valve V. If the left control line 28b with the control pressure is acted upon, the compressed air from the compressed air source 25 passes through the Pressure line 29b to the left work space 7. At the same time the vent control valve due to the control pressure applied here in parallel Positioned in which the right pressure line 29a via the bleed control valve 30 vented into the atmosphere and thus depressurized. In order to the right ventilation valve 27a in the working cylinder A is relieved and the Air can escape from the right-hand work space 6, which is therefore a vented counter chamber is to escape into the atmosphere via this valve 27a.
  • FIG. 6 An advantageous embodiment for the switch valve is in FIG. 6 shown.
  • a rocker valve is used as a switch valve W provided.
  • An essentially rigid, movable about an axis of rotation Seesaw 31 from e.g. Metal is stored in a valve housing 32.
  • the seesaw 31 is for example between two elastomer sealing elements 33 - for higher ones Preferably press reinforced - embedded and and the axis of rotation D swiveling.
  • the housing 32 has at least one supply connection Connection to the compressed air source 25 and two working connections on, of which the pressure lines 29a, 29b go out to the working cylinder A.
  • control line 28a also acts on the ventilation control valve 24a with the control pressure, this opens the connection from the right pressure line 29a to the atmosphere and thus depressurises this line, which also causes the right vent valve Open 27a in working cylinder A and the corresponding working space in can vent the atmosphere.
  • the embodiment of the rocker switch valve W of Fig. 6 or 7 advantageous.
  • the control rooms 34a, 34b for the actuation of the rocker 31 are each with a flexible Membrane 35 sealed opening, through which membranes 35 the pressure prevailing in the control chamber 34a, 34b for actuating the sealing elements 36a, 36b of the ventilation control valves is transferred to them, preferably via the valve stems 37a, 37b. From the work ports too The discharge lines 38a, 38b lead past the rocker to the pressure lines 29a, 29b 31 to the vent control valves and further to drain openings in the The atmosphere.
  • valve for Control one of the two work rooms or also for double-acting A possible switch valve to control both workrooms directly attached to the working cylinder or integrated into it, preferably in one of the two end pieces of this cylinder. That too or each bleed control valve can be attached to the working cylinder in the same way and / or the switch valve is attached or even integrated into it his.
  • control logic arrangement in or on the working cylinder A. is integrated. This can be flanged to the working cylinder or a preferably one of its end pieces can be integrated. From the central Control units go connecting lines to this control logic arrangement in the or on the working cylinder, that of communication, electrical control, serve the energy supply and the supply with the working medium. As A fieldbus is preferably provided for the communication system.
  • the Control logic arrangement can also be control signals or position signals, for example End position or position sensors in or on the working cylinder or from evaluate these actuated elements and take appropriate actions to trigger them control the control valves or these signals and actions via the Report back communication lines to the control unit.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Actuator (AREA)
  • Jib Cranes (AREA)
EP99890249A 1998-08-04 1999-07-23 Cylindre à pression fluidique, soupape de commutation et unité de travail entraínée par pression Expired - Lifetime EP0984170B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT134498 1998-08-04
AT0134498A AT407661B (de) 1998-08-04 1998-08-04 Druckmittelzylinder, weichenventil und druckmittelbetätigte arbeitseinheit

Publications (3)

Publication Number Publication Date
EP0984170A2 true EP0984170A2 (fr) 2000-03-08
EP0984170A3 EP0984170A3 (fr) 2001-08-08
EP0984170B1 EP0984170B1 (fr) 2004-02-18

Family

ID=3511879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99890249A Expired - Lifetime EP0984170B1 (fr) 1998-08-04 1999-07-23 Cylindre à pression fluidique, soupape de commutation et unité de travail entraínée par pression

Country Status (6)

Country Link
US (2) US6276257B1 (fr)
EP (1) EP0984170B1 (fr)
JP (1) JP2000065012A (fr)
AT (2) AT407661B (fr)
DE (1) DE59908562D1 (fr)
ES (1) ES2216481T3 (fr)

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DE102017111466A1 (de) 2017-05-24 2018-11-29 TRüTZSCHLER GMBH & CO. KG Pneumatikzylinder für Vlieswickler

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JP1575546S (fr) * 2016-12-16 2017-05-08
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JP1575966S (fr) * 2016-12-16 2017-05-08
JP1601259S (fr) * 2017-09-07 2018-04-09
TWD195577S (zh) * 2017-09-07 2019-01-21 日商Ｓｍｃ股份有限公司 電動旋轉致動器之部分
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JP2000065012A (ja) 2000-03-03
EP0984170A3 (fr) 2001-08-08
AT407661B (de) 2001-05-25
ATE259939T1 (de) 2004-03-15
US20010018860A1 (en) 2001-09-06
ES2216481T3 (es) 2004-10-16
US6679162B2 (en) 2004-01-20
EP0984170B1 (fr) 2004-02-18
US6276257B1 (en) 2001-08-21
DE59908562D1 (de) 2004-03-25
ATA134498A (de) 2000-09-15

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