EP1233190A1 - Turbomachine avec une roue à aubes radiale - Google Patents

Turbomachine avec une roue à aubes radiale Download PDF

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Publication number
EP1233190A1
EP1233190A1 EP02003087A EP02003087A EP1233190A1 EP 1233190 A1 EP1233190 A1 EP 1233190A1 EP 02003087 A EP02003087 A EP 02003087A EP 02003087 A EP02003087 A EP 02003087A EP 1233190 A1 EP1233190 A1 EP 1233190A1
Authority
EP
European Patent Office
Prior art keywords
housing
compressor
spiral
fixation
insert
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
EP02003087A
Other languages
German (de)
English (en)
Other versions
EP1233190B1 (fr
Inventor
Klaus Dr. Bartholomä
Wolfgang Schmidt
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.)
Everllence SE
Original Assignee
MAN B&W Diesel GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7674629&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1233190(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MAN B&W Diesel GmbH filed Critical MAN B&W Diesel GmbH
Publication of EP1233190A1 publication Critical patent/EP1233190A1/fr
Application granted granted Critical
Publication of EP1233190B1 publication Critical patent/EP1233190B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/026—Scrolls for radial machines or engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/10—Geometry two-dimensional
    • F05B2250/15—Geometry two-dimensional spiral
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/20—Geometry three-dimensional
    • F05B2250/25—Geometry three-dimensional helical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers

Definitions

  • the invention relates to a turbomachine with radial flow Compressor wheel, which consists of a spiral compressor housing with a helical flow channel is enclosed, according to the preamble of claim 1.
  • Such compressor housings are usually used by turbochargers and their Built-in fixtures.
  • Smaller turbochargers can be stiff due to the relatively large wall thicknesses Housing parts absorb these forces. With large turbochargers, the Housing wall thicknesses mostly reduced for reasons of casting technology, whereby with such stress the breaking point of the material is quickly reached and housing breakages can occur. Fragments from the Turbocharger leak, with considerable consequential damage.
  • the compressor housing is an outer volute casing, which the in the radial direction outwardly deflected channel section of the flow channel comprises, and an inner housing insert which in the radial direction between the volute and the compressor wheel is provided and its Inner contour with the outer contour of the hub of the compressor wheel substantially in the axial direction channel section of the Forms flow channel, has the volute with a Housing insert piece at least partially executed inner cylinder is on this the housing insert to form a cavity by means of a flexible fixation is attached in the axial direction, and the flexible fixation of the housing insert less shatterproof than the rigid fixation of the Compressor housing on the bearing housing is a spiral housing with a "crumple zone", from which no fragment of a burst impeller can leak more.
  • the kinetic energy of Fragments of a bursting compressor wheel can now be inside the Turbocharger can be completely converted into deformation energy and heat.
  • volute casing intended wall of the bearing housing in the radial direction up to the outer Tip of the outer contour of the compressor wheel, forming a gap arranged pulled down, so that an additional "brake”, that is Protection against radial leakage of fragments of the compressor wheel is specified.
  • Parting line on the bearing housing is that the outer, the deflected Spiral housing comprising channel section on the rigid fixation of the Compressor housing past the bearing housing in the radial direction B inwards is pulled, so that the rigid fixation in the radial direction B further out lying as the parting line between the spiral and bearing housing is arranged.
  • This measure of the special arrangement of the parting line ensures that the rigid fixation of the compressor housing on the bearing housing from possibly yourself fragments wedging in the flow channel is hardly loaded, thereby causing a Breakage of the compressor housing is further excluded.
  • the exhaust gas turbocharger of the type on which the drawing is based has an in their central longitudinal region in a bearing housing 1 shaft 2, which their ends projecting over the bearing are not shown here Turbine wheel and a radial shown schematically in the drawing flows through the compressor wheel 3 carries.
  • the compressor wheel 3 shown has one on the through the turbine wheel driven shaft 2 rotatably received hub 4, the circumferential side is occupied with radially projecting blades 5.
  • the outer contour 6 of the hub 4 limits with the inner contour 7 of a compressor housing 8 one of the axial Directed in direction A in the radial direction B, narrowing outwards Flow channel 9, the cross section of the configuration of the blades 5 equivalent.
  • the compressor housing 8 is by means of a rigid fixation 18 Bearing housing 1 attached.
  • the diameter of the hub 4 and the blades 5 increases from the flow inlet to the flow outlet, so that one to Central transverse plane of the compressor wheel 3 asymmetrical longitudinal cross section and accordingly also increasing over the length of the compressor wheel 3 Mass distribution result.
  • the compressor housing 8 is from an outer on the bearing housing by means of the rigid fixation 18 moored spiral housing 10, which in the radial Direction B outwardly deflected channel section 11 of the flow channel 9 comprises, and an inner housing insert 12 which in the radial direction B is provided between the volute casing 10 and the compressor wheel 3 and whose inner contour 13 with the outer contour 6 of the hub 4 of the compressor wheel 3 which extends essentially in the axial direction A channel section 14 of the Forms flow channel 9, built.
  • the compressor housing 8 is under the outer spiral housing 10
  • Forming a parting line 22 on the bearing housing 1 is that the outer spiral housing 10 comprising the deflected channel section 11 the rigid fixation 18 of the compressor housing 8 past the bearing housing 1 in radial direction B is pulled inwards so that the rigid fixation 18 in radial direction B lying further outwards than the parting line 22 between spiral 10 and bearing housing 1 is arranged.
  • This measure the special Arrangement of the parting line 22 ensures that the rigid fixation 18 of the Compressor housing 8 on the bearing housing 1 of possibly in the flow channel 9 wedging fragments is hardly loaded, causing the Compressor housing 8 is excluded even further.
  • the distance between the Parting line 22 and the shaft 2 smaller than the distance from the center of the surface 23 of the largest cross-sectional area 24 through the deflected channel section 11 in the spiral housing 10 to the shaft 2.
  • the spiral housing 10 is at least with the housing insert 12 partially surrounding inner cylinder 15 executed on this Housing insert 12 for forming a cavity 16 by means of a axial direction A flexible fixation 17 is attached.
  • the flexible fixation 17 the housing insert 12 is significantly less shatterproof than the rigid fixation 18 of the spiral housing 10 on the bearing housing 1.
  • the rigid fixation 18 of the compressor housing 8 or the spiral housing 10 is by means of a fixed flange connection of the spiral housing 10 on the bearing housing 1 and the flexible fixation 17 of the housing insert 12 by means of a Expansion screw fixation in the axial direction A through the inner cylinder 15 of the Spiral casing 10 executed.
  • the provided for rigid fixation 18 of the volute 8 wall 19 of the Bearing housing 1 is in the radial direction B to over the outer tip 20 of the Outer contour 6 of the hub 4 of the compressor wheel 3, forming a gap 21 arranged pulled down.
  • the spiral housing 10 is always inward in the direction of the compressor wheel 3 decreasing diameter of the flow channel 9 executed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Supercharger (AREA)
EP02003087A 2001-02-20 2002-02-13 Compresseur centrifuge Expired - Lifetime EP1233190B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10107807A DE10107807C1 (de) 2001-02-20 2001-02-20 Strömungsmaschine mit radial durchströmtem Verdichterrad
DE10107807 2001-02-20

Publications (2)

Publication Number Publication Date
EP1233190A1 true EP1233190A1 (fr) 2002-08-21
EP1233190B1 EP1233190B1 (fr) 2010-06-02

Family

ID=7674629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02003087A Expired - Lifetime EP1233190B1 (fr) 2001-02-20 2002-02-13 Compresseur centrifuge

Country Status (6)

Country Link
US (1) US6638007B2 (fr)
EP (1) EP1233190B1 (fr)
JP (1) JP4119654B2 (fr)
KR (1) KR100794974B1 (fr)
CN (1) CN1267648C (fr)
DE (2) DE10107807C1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2414769A (en) * 2004-06-05 2005-12-07 Man B & W Diesel Ag Turbo-machine with impeller containment assembly.
DE102004028133A1 (de) 2004-06-09 2006-01-05 Man B & W Diesel Ag Strömungsmaschine, insbesondere Abgasturbolader
DE102004044703A1 (de) * 2004-09-15 2006-03-16 Volkswagen Ag Abgasturbolader für eine Brennkraftmaschine
DE102005039820A1 (de) * 2005-08-22 2007-03-01 Man Diesel Se Containment-Sicherung für Strömungsmaschinen mit radial durchströmten Verdichterrad
DE102008056512A1 (de) 2008-11-08 2010-05-12 Man Diesel Se Verdichtergehäuse einer Strömungsmaschine mit schneckenförmigem Strömungskanal
US8932008B2 (en) 2008-04-08 2015-01-13 Continental Automotive Gmbh Securing element and exhaust gas turbocharger having variable turbine geometry
DE102018102704A1 (de) * 2018-02-07 2019-08-08 Man Energy Solutions Se Radialverdichter

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EP1586745B1 (fr) * 2004-04-13 2015-07-29 ABB Turbo Systems AG Carter de compresseur
US20060127242A1 (en) * 2004-12-09 2006-06-15 Martin Steve P Turbocharger with removable wheel shrouds and/or removable seals
EP1891335B1 (fr) * 2005-06-06 2017-03-29 Gebr. Becker GmbH Ventilateur radial
DE102005025865A1 (de) * 2005-06-06 2006-12-07 Gebr. Becker Gmbh & Co Kg Radialgebläse
US7568338B2 (en) * 2005-12-23 2009-08-04 Honeywell International Inc. Multi-piece compressor housing
US8108003B2 (en) * 2006-03-09 2012-01-31 Alcatel Lucent Controlling base station router device definition codes
US7874136B2 (en) * 2006-04-27 2011-01-25 Pratt & Whitney Canada Corp. Rotor containment element with frangible connections
WO2008055717A1 (fr) 2006-11-10 2008-05-15 Abb Turbo Systems Ag Liaison de carter d'un turbocompresseur à gaz d'échappement
CN100451345C (zh) * 2007-02-02 2009-01-14 清华大学 具有抽气和射流机匣结构的离心压气机
CN101965460B (zh) * 2007-11-20 2014-08-13 曼·胡默尔有限公司 用于离心压缩机的壳体
DE102007055615A1 (de) * 2007-11-20 2009-05-28 Mann + Hummel Gmbh Gehäuse für einen Radialverdichter
DE102008025249A1 (de) * 2008-05-27 2009-12-03 Siemens Aktiengesellschaft Sammelraum und Verfahren zur Fertigung
US8235648B2 (en) 2008-09-26 2012-08-07 Pratt & Whitney Canada Corp. Diffuser with enhanced surge margin
DE102008061398A1 (de) 2008-12-10 2010-06-17 Man Diesel Se Berstschutz für eine Strömungsmaschine
GB0912796D0 (en) * 2009-07-23 2009-08-26 Cummins Turbo Tech Ltd Compressor,turbine and turbocharger
US8984895B2 (en) * 2010-07-09 2015-03-24 Icr Turbine Engine Corporation Metallic ceramic spool for a gas turbine engine
US9051873B2 (en) 2011-05-20 2015-06-09 Icr Turbine Engine Corporation Ceramic-to-metal turbine shaft attachment
US10094288B2 (en) 2012-07-24 2018-10-09 Icr Turbine Engine Corporation Ceramic-to-metal turbine volute attachment for a gas turbine engine
DE102012217381A1 (de) * 2012-09-26 2014-03-27 Bosch Mahle Turbo Systems Gmbh & Co. Kg Radialverdichter für einen Abgasturbolader
GB2517482B (en) * 2013-08-22 2020-02-26 Napier Turbochargers Ltd Turbocharger
ITCO20130067A1 (it) 2013-12-17 2015-06-18 Nuovo Pignone Srl Girante con elementi di protezione e compressore centrifugo
EP3051144B1 (fr) * 2013-12-24 2018-02-21 Mitsubishi Heavy Industries, Ltd. Compresseur et dispositif de suralimentation
JP6234480B2 (ja) * 2013-12-27 2017-11-22 三菱重工業株式会社 コンプレッサ
JP6391970B2 (ja) * 2014-03-31 2018-09-19 三菱重工業株式会社 遠心圧縮機、過給機、および遠心圧縮機の製造方法、並びにサイレンサ
DE102014106415A1 (de) * 2014-05-08 2015-11-12 Abb Turbo Systems Ag Verdichtergehäuse
JP6486648B2 (ja) * 2014-10-28 2019-03-20 三菱重工業株式会社 遠心圧縮機およびそれを備えた過給機
US9995179B2 (en) 2014-12-17 2018-06-12 Progress Rail Locomotive Inc. Compressor assembly for turbocharger burst containment
DE102015005054A1 (de) * 2015-04-21 2016-10-27 Man Diesel & Turbo Se Strömungsmaschine
CN105065328B (zh) * 2015-08-06 2017-11-14 中国北方发动机研究所(天津) 一种用于离心压气机的双槽自动调节机匣处理装置
US10526954B2 (en) 2015-08-06 2020-01-07 Garrett Transportation I Inc. Turbocharger assembly
US9926942B2 (en) 2015-10-27 2018-03-27 Pratt & Whitney Canada Corp. Diffuser pipe with vortex generators
US10570925B2 (en) 2015-10-27 2020-02-25 Pratt & Whitney Canada Corp. Diffuser pipe with splitter vane
JP6670862B2 (ja) * 2016-02-15 2020-03-25 三菱重工エンジン＆ターボチャージャ株式会社 遠心圧縮機、および、過給機
CN106121748B (zh) * 2016-08-30 2017-09-29 湖南天雁机械有限责任公司 带有进气口和出气口连接体的涡轮增压器压壳
US10823197B2 (en) 2016-12-20 2020-11-03 Pratt & Whitney Canada Corp. Vane diffuser and method for controlling a compressor having same
US10494955B2 (en) * 2017-01-30 2019-12-03 Garrett Transportation I Inc. Sheet metal turbine housing with containment dampers
US11680582B2 (en) * 2017-09-25 2023-06-20 Johnson Controls Tyco IP Holdings LLP Two piece split scroll for centrifugal compressor
DE102017221717A1 (de) * 2017-12-01 2019-06-06 Man Energy Solutions Se Radialverdichter
DE102018110235A1 (de) * 2018-04-27 2019-10-31 Man Energy Solutions Se Turbolader
US11187149B2 (en) * 2019-11-25 2021-11-30 Transportation Ip Holdings, Llc Case-integrated turbomachine wheel containment
JP7562357B2 (ja) * 2020-09-30 2024-10-07 三菱重工マリンマシナリ株式会社 回転機械
US11614001B1 (en) * 2021-11-11 2023-03-28 Progress Rail Locomotive Inc. Turbine containment

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DE19502808A1 (de) * 1995-01-30 1996-08-08 Man B & W Diesel Ag Radialströmungsmaschine
EP0834646A1 (fr) * 1996-10-02 1998-04-08 Asea Brown Boveri AG Dispositif de rétention pour la turbine radiale d'un turbocompresseur
DE19727139A1 (de) * 1997-06-26 1999-01-07 Daimler Benz Ag Verdichter eines Abgasturboladers
US5934868A (en) * 1996-05-08 1999-08-10 Asea Brown Boveri Ag Axial turbine of an exhaust-gas turbocharger

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SE520740C2 (sv) * 1998-06-30 2003-08-19 Abs Pump Prod Ab Centrifugalpump
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Publication number Priority date Publication date Assignee Title
DE4223496A1 (de) * 1992-07-17 1994-01-20 Asea Brown Boveri Vorrichtung zum Reduzieren der kinetischen Energie von berstenden Teilen
DE19502808A1 (de) * 1995-01-30 1996-08-08 Man B & W Diesel Ag Radialströmungsmaschine
US5934868A (en) * 1996-05-08 1999-08-10 Asea Brown Boveri Ag Axial turbine of an exhaust-gas turbocharger
EP0834646A1 (fr) * 1996-10-02 1998-04-08 Asea Brown Boveri AG Dispositif de rétention pour la turbine radiale d'un turbocompresseur
DE19727139A1 (de) * 1997-06-26 1999-01-07 Daimler Benz Ag Verdichter eines Abgasturboladers

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1707123B (zh) * 2004-06-05 2010-08-18 曼·B及W柴油机公开股份有限公司 具有径向通流压缩机转子的涡轮机
FR2871201A1 (fr) * 2004-06-05 2005-12-09 Man B & W Diesel Ag Machine fluidique a rotor de compresseur radial
DE102004027594A1 (de) * 2004-06-05 2005-12-29 Man B & W Diesel Ag Strömungsmaschine mit radial durchströmtem Verdichterrad
DE102004027594B4 (de) * 2004-06-05 2006-06-29 Man B & W Diesel Ag Strömungsmaschine mit radial durchströmtem Verdichterrad
GB2414769A (en) * 2004-06-05 2005-12-07 Man B & W Diesel Ag Turbo-machine with impeller containment assembly.
GB2414769B (en) * 2004-06-05 2009-11-04 Man B & W Diesel Ag Turbo-machine having a compressor wheel with radial flow
DE102004028133A1 (de) 2004-06-09 2006-01-05 Man B & W Diesel Ag Strömungsmaschine, insbesondere Abgasturbolader
DE102004028133B4 (de) 2004-06-09 2006-06-01 Man B & W Diesel Ag Strömungsmaschine, insbesondere Abgasturbolader
DE102004028133C5 (de) * 2004-06-09 2017-10-26 Man Diesel & Turbo Se Strömungsmaschine, insbesondere Abgasturbolader
DE102004044703A1 (de) * 2004-09-15 2006-03-16 Volkswagen Ag Abgasturbolader für eine Brennkraftmaschine
DE102005039820B4 (de) * 2005-08-22 2007-06-28 Man Diesel Se Containment-Sicherung für Strömungsmaschinen mit radial durchströmtem Verdichterrad
DE102005039820A1 (de) * 2005-08-22 2007-03-01 Man Diesel Se Containment-Sicherung für Strömungsmaschinen mit radial durchströmten Verdichterrad
US8932008B2 (en) 2008-04-08 2015-01-13 Continental Automotive Gmbh Securing element and exhaust gas turbocharger having variable turbine geometry
DE102008056512A1 (de) 2008-11-08 2010-05-12 Man Diesel Se Verdichtergehäuse einer Strömungsmaschine mit schneckenförmigem Strömungskanal
DE102008056512B4 (de) * 2008-11-08 2016-07-21 Man Diesel & Turbo Se Verdichtergehäuse einer Strömungsmaschine mit schneckenförmigem Strömungskanal
DE102018102704A1 (de) * 2018-02-07 2019-08-08 Man Energy Solutions Se Radialverdichter

Also Published As

Publication number Publication date
KR20020068271A (ko) 2002-08-27
DE10107807C1 (de) 2002-07-25
JP2002257092A (ja) 2002-09-11
JP4119654B2 (ja) 2008-07-16
CN1267648C (zh) 2006-08-02
US20020114693A1 (en) 2002-08-22
EP1233190B1 (fr) 2010-06-02
KR100794974B1 (ko) 2008-01-15
US6638007B2 (en) 2003-10-28
DE50214459D1 (de) 2010-07-15
CN1372082A (zh) 2002-10-02

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