EP1230116A1 - Ventilanordnung, insbesondere für eine schlupfgeregelte hydraulische fahrzeugbremsanlage - Google Patents
Ventilanordnung, insbesondere für eine schlupfgeregelte hydraulische fahrzeugbremsanlageInfo
- Publication number
- EP1230116A1 EP1230116A1 EP00984874A EP00984874A EP1230116A1 EP 1230116 A1 EP1230116 A1 EP 1230116A1 EP 00984874 A EP00984874 A EP 00984874A EP 00984874 A EP00984874 A EP 00984874A EP 1230116 A1 EP1230116 A1 EP 1230116A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- receiving bore
- radially inner
- valve housing
- holder
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0821—Attachment or sealing of modular units to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
- B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
- B60T8/3675—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0807—Manifolds
- F15B13/0814—Monoblock manifolds
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0828—Modular units characterised by sealing means of the modular units
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0832—Modular 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
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0871—Channels for fluid
-
- 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
- Y10T137/0318—Processes
- Y10T137/0402—Cleaning, repairing, or assembling
- Y10T137/0491—Valve or valve element assembling, disassembling, or replacing
-
- 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
- Y10T137/598—With repair, tapping, assembly, or disassembly means
- Y10T137/5987—Solenoid or electromagnetically operated valve
Definitions
- Valve arrangement in particular for a slip-controlled hydraulic vehicle brake system
- the invention is based on a valve arrangement, in particular for a slip-controlled hydraulic vehicle brake system according to the preamble of claim 1.
- an electromagnetic valve is known, with a valve housing which receives valve components and which is fastened in a stepped bore of a valve block.
- the diameter of the valve housing is reduced in the joining direction by a shoulder, which is followed by a recess designed as an annular groove.
- the material of the valve block has a lower material hardness than the material of the valve housing.
- the device according to the invention according to claim 1 has the advantage that no shock loads occur when the valves are mounted in the receiving bores, as a result of which valve components or the valve block could be damaged.
- the melting of the valve block, which is made of thermoplastic, in the area of the inner wall of the receiving bore by means of the previously heated and then inserted valve results in an easily flowable, viscous melt which also penetrates into small depressions in the valve housing or the valve holder. Since also the
- the drawn-in area has circumferential knurls and / or cross knurls formed on the outer circumference of the valve holder and two additional spaced axially apart Dete annular grooves, of which an annular groove is arranged in the region of a radially outer shoulder which reduces the outer diameter of the valve holder in the joining direction and which is braced against a first radially inner shoulder of the receiving bore.
- the circumferential knurls allow the valve holder to be connected to the receiving bore in a relatively large area.
- a preferred measure further provides that a radially inner shoulder is formed at the head end of the valve holder, through which the valve housing is tensioned against a radially inner shoulder of the receiving bore, a lower part of the valve housing protruding from the valve holder. Since the fixation of the
- Valve housing is already guaranteed by the two shoulders, its radially outer circumferential surface in the region of the valve holder can be made cylindrically smooth, as a result of which it can be manufactured inexpensively.
- FIG. 1 shows a side view of a valve arrangement according to the invention in a preferred embodiment
- FIG. 2 shows a sectional illustration along the line II-II of FIG. 1
- FIGS. 3 and 4, 5 and 6, 7 and 8 further embodiments in a corresponding representation.
- valve arrangement according to the invention designated 1, is provided, for example, for a slip-controlled hydraulic vehicle brake system and contains a valve block 2 consisting essentially of thermoplastic, in which receiving bores 4 for receiving electromagnetically actuated ones
- Valves are formed, of which the e.g. a 2/2-way outlet valve 6 blocking the backflow of brake fluid from a wheel brake cylinder to a return pump in its currentless basic position.
- the connection to the return pump is established by a transverse outlet channel 8 formed in the valve block 2, which opens into an annular channel 10 between a valve housing 12 receiving valve components and an inner wall 14 of the receiving bore 4.
- the valve housing 12 preferably has a larger diameter valve housing head 16, in which e.g. a solenoid and a Polkem is housed and a smaller diameter valve housing foot 18 which e.g. encloses a valve seat. Accordingly, the diameter of an upper section 20 of the receiving bore 4 receiving the valve housing head 16 is larger than a lower section 22.
- the upper section 20 is the
- Receiving hole 4 additionally stepped several times, the diameter due to a first radially inner shoulder 24 and one this, in the joining direction of the valve 6, the second radially inner shoulder 26 adjoining and a third radially inner shoulder 28 gradually decreases.
- the shoulders 24, 26, 28 serve to support the valve 6, a valve holder 30 and a sealing ring designed as an O-ring 32 in the receiving bore 4, the aforementioned components together forming a preassembled unit 34 shown in FIG.
- the sleeve-shaped valve holder 30 is pushed onto the valve housing head 16 and encloses it almost completely in the axial direction, with only a lower, lower section 36 of the valve housing head 16 protruding compared to the diameter of the cross section of the O-ring 32 ,
- the valve holder 30 has at its head end a radially inner shoulder 38 which engages over the edge of the head end face 40 of the valve housing 12 in the preassembled state.
- the radially outer peripheral surface 42 of the valve housing head 16 is cylindrically smooth and therefore easy and inexpensive to manufacture.
- knurls 46 and cross knurls 48 are formed on the outer circumference 44 of the valve holder 30.
- two annular grooves 50 spaced apart from one another in the axial direction are provided, of which an annular groove 52 is arranged in the region of a radially outer shoulder 54 that reduces the outer diameter of the valve holder 30 in the joining direction.
- the O-ring 32 is pressed radially and, in the preassembled state, is pushed onto the lower section 36 of the valve housing head 16 protruding from the foot end 56 of the valve holder 30 until it rests on the foot end face 58 of the valve holder 30.
- the previously assembled preassembled unit 34 is heated and pressed or inserted into the receiving bore 4 until the radially outer shoulder 54 of the valve holder 30 on the first radially inner shoulder 24 of the receiving bore 4 and the lower one protruding from the valve holder 30 Section 36 of the valve housing head 16 abuts the third radially inner shoulder 28 of the receiving bore 4.
- a disk-shaped upper end face 60 of the valve holder 30 is flush with the edge of the receiving bore 4.
- the outer peripheral surface 44 of the valve holder 30 lies against the inner wall 14 of the receiving bore in a heat-transferring manner.
- the thermoplastic plastic of the inner wall 14 of the receiving bore 4 is melted and can flow into the retracted areas formed by the two ring grooves 50 and the knurls 46 and cross knurls 48. After cooling of the thermally deformed plastic in this way, there is a positive connection between the valve holder 30 and the receiving bore 4.
- the valve housing head 16 is clamped between the radially inner shoulder 38 of the valve holder 30 and the third radially inner shoulder 28 of the receiving bore 4.
- the O-ring 32 is thereby clamped in an annular space 62 which in the axial direction through the foot-side end face 58 of the valve holder 30 and the second radially inner shoulder 26 of the receiving bore 4 and in the radial direction through the lower section projecting from the valve holder 30 36 of the valve housing head 16 and the the first radially inner shoulder 24 in the joining direction of the part 64 of the inner wall 14 of the receiving bore 4 is limited.
- the O-ring 32 is used for pressure and fluid-tight sealing of the ring channel 10 connected to the outlet channel 8 in the valve block to the head of the valve 6.
- valve housing head 16 is preferably essentially the same length as the valve holder 30, the length of the lower section 36 of the valve housing head 16 protruding from the valve holder 30 corresponds to that of the radially inner shoulder 38 of the valve holder. Then the O-ring 32 can use the annular space 62, which is created by the axial offset of the valve housing 12 due to the radially inner shoulder 38 on the valve holder 30, so that there is a compact design in the axial direction and the upper, the valve housing head 16 receiving section 20 of the receiving bore 4 can be relatively short.
- the O-ring 32a is clamped in an annular space 62a, which is formed in the axial direction by an outer shoulder 36a of the valve housing head 16a which projects from the lower valve holder 30a 66a and the third radially inner shoulder
- this annular space 62a is delimited on the one hand by the valve housing head 16a, the diameter of which is reduced at this point by the shoulder 66a corresponding in depth to the cross section of the O-ring 32a, and on the other hand by the second radially inner paragraph
- valve holder 30b does not have a radially inner shoulder, but rather a continuously smooth inner bore, as a result of which it can be produced simply and inexpensively.
- valve housing 12b has a flange ring 70b formed on its outer circumference, which is clamped between the foot-side end face 58b of the valve holder 30b and the third radially inner shoulder 28b of the receiving bore 4b.
- the diameter of the receiving bore 4b is further reduced by a fourth radially inner shoulder 72b adjoining the third radially inner shoulder 28b in the joining direction.
- the O-ring 32b is received in an annular space 62b, which is delimited in the axial direction by a lower flange surface 76b and the fourth radially inner shoulder 72b of the receiving bore 4b.
- this annular space 62b is delimited by the valve housing foot 18b with reduced diameter and the part 78b of the inner wall 14b of the receiving bore 4b adjoining the third radially inner shoulder 28b in the joining direction. This in turn shifts the position of the O-ring 32b a little further radially inward, which is why the total pressure force acting on the valve holder 30b in the axial direction is further reduced.
- the knurls 46c, cross knurls 48c and the two ring grooves 50c can be formed directly on the outer circumference 80c of the valve housing 12c, as shown in the fourth embodiment according to FIGS. 7 and 8.
- the outer contour of the valve housing head 16c then corresponds to that of the valve holder of the previously described embodiments.
- the O-ring 32c is received in an additional annular groove 82c in the joining direction on the outer circumference 80c of the valve housing head 16c in the joining direction on the two annular grooves 50c which provide the positive locking. Since on a valve body 12c enclosing
- the diameter of the valve housing head 16c can be chosen to be correspondingly small, which has a positive effect on the space available in the valve block 2c.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Transportation (AREA)
- Valve Housings (AREA)
- Magnetically Actuated Valves (AREA)
- Regulating Braking Force (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19952855A DE19952855A1 (de) | 1999-11-03 | 1999-11-03 | Ventilanordnung, insbesondere für eine schlupfgeregelte hydraulische Fahrzeugbremsanlage |
| DE19952855 | 1999-11-03 | ||
| PCT/DE2000/003815 WO2001032486A1 (de) | 1999-11-03 | 2000-10-28 | Ventilanordnung, insbesondere für eine schlupfgeregelte hydraulische fahrzeugbremsanlage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1230116A1 true EP1230116A1 (de) | 2002-08-14 |
Family
ID=7927756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00984874A Withdrawn EP1230116A1 (de) | 1999-11-03 | 2000-10-28 | Ventilanordnung, insbesondere für eine schlupfgeregelte hydraulische fahrzeugbremsanlage |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6899123B1 (de) |
| EP (1) | EP1230116A1 (de) |
| JP (1) | JP2003512973A (de) |
| KR (1) | KR20020053832A (de) |
| DE (1) | DE19952855A1 (de) |
| WO (1) | WO2001032486A1 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001143924A (ja) * | 1999-11-15 | 2001-05-25 | Aisin Seiki Co Ltd | 電磁石 |
| EP1531107B1 (de) * | 2003-11-14 | 2007-09-12 | Mando Corporation | Hydraulikaggregrat für eine blockiergeschützte Fahrzeugbremsanlage und Verfahren zur dessen Herstellung |
| KR100536294B1 (ko) * | 2003-11-14 | 2005-12-14 | 주식회사 만도 | 안티록 브레이크시스템용 유압유닛 및 그 제조방법 |
| DE102008062166A1 (de) * | 2008-12-13 | 2010-06-17 | Schaeffler Kg | Hydraulische Baueinheit und Hydraulikventil zur Bildung der Baueinheit |
| CN102384305A (zh) * | 2011-09-20 | 2012-03-21 | 铜陵祥云消防科技有限责任公司 | 气动阀门 |
| JP6442239B2 (ja) * | 2014-11-12 | 2018-12-19 | ニッタ株式会社 | テストコネクション付継手 |
| CN107076341B (zh) * | 2014-11-12 | 2020-05-08 | 霓达株式会社 | 带测试连接器的接头 |
| JP6405197B2 (ja) * | 2014-11-12 | 2018-10-17 | ニッタ株式会社 | テストコネクション付継手 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54103971A (en) * | 1978-02-01 | 1979-08-15 | Aisin Seiki Co Ltd | Coupling of plastic-made reservoir to cylinder body |
| DE4221988A1 (de) | 1992-07-04 | 1994-01-05 | Teves Gmbh Alfred | Elektromagnetventil |
| JPH0658451A (ja) * | 1992-08-11 | 1994-03-01 | Hitachi Ltd | 液圧ユニットにおける電磁弁の固定方法及びシール方法並びに液圧ユニットにおける電磁弁の固定構造及びシール構造並びに電磁弁の組み付け治具並びにabs |
| DE4340261A1 (de) * | 1993-11-26 | 1995-06-01 | Teves Gmbh Alfred | Bremskraftregler in Twin-Bauweise mit elektromagnetisch betätigter Sperrvorrichtung |
| DE19529550A1 (de) | 1995-08-11 | 1997-02-13 | Hydraulik Ring Gmbh | Steuerungseinrichtung, insbesondere für Getriebe von Kraftfahrzeugen, sowie Verfahren zur Herstellung einer Steuerungseinrichtung |
| US5895026A (en) * | 1996-03-06 | 1999-04-20 | Kelsey-Hayes Company | Foil wound coil for a solenoid valve |
| DE19709741A1 (de) | 1997-03-10 | 1998-09-17 | Itt Mfg Enterprises Inc | Drucksteuervorrichtung |
| WO1999044872A1 (de) | 1998-03-03 | 1999-09-10 | Continental Teves Ag & Co. Ohg | Elektromagnetventil |
| DE19955886A1 (de) * | 1999-11-20 | 2001-05-23 | Bosch Gmbh Robert | Magnetventil mit einem Rückschlagventil |
| US6450590B1 (en) * | 2000-09-28 | 2002-09-17 | Kelsey-Hayes Company | Control valve with reduced seat for a hydraulic control unit |
-
1999
- 1999-11-03 DE DE19952855A patent/DE19952855A1/de not_active Ceased
-
2000
- 2000-10-28 JP JP2001534659A patent/JP2003512973A/ja active Pending
- 2000-10-28 US US10/129,303 patent/US6899123B1/en not_active Expired - Fee Related
- 2000-10-28 WO PCT/DE2000/003815 patent/WO2001032486A1/de not_active Ceased
- 2000-10-28 KR KR1020027005603A patent/KR20020053832A/ko not_active Withdrawn
- 2000-10-28 EP EP00984874A patent/EP1230116A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0132486A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2001032486A1 (de) | 2001-05-10 |
| US6899123B1 (en) | 2005-05-31 |
| DE19952855A1 (de) | 2001-05-10 |
| KR20020053832A (ko) | 2002-07-05 |
| JP2003512973A (ja) | 2003-04-08 |
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