EP1207010B1 - Grinding machine - Google Patents

Grinding machine Download PDF

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Publication number
EP1207010B1
EP1207010B1 EP01124844A EP01124844A EP1207010B1 EP 1207010 B1 EP1207010 B1 EP 1207010B1 EP 01124844 A EP01124844 A EP 01124844A EP 01124844 A EP01124844 A EP 01124844A EP 1207010 B1 EP1207010 B1 EP 1207010B1
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EP
European Patent Office
Prior art keywords
grinding machine
wall
ceramic
gap
axis
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.)
Expired - Lifetime
Application number
EP01124844A
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German (de)
French (fr)
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EP1207010A2 (en
EP1207010A3 (en
Inventor
Harald Dietrich
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.)
Otec Praezisionsfinish GmbH
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Otec Praezisionsfinish GmbH
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Publication date
Application filed by Otec Praezisionsfinish GmbH filed Critical Otec Praezisionsfinish GmbH
Publication of EP1207010A2 publication Critical patent/EP1207010A2/en
Publication of EP1207010A3 publication Critical patent/EP1207010A3/en
Application granted granted Critical
Publication of EP1207010B1 publication Critical patent/EP1207010B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
    • B24B31/108—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work involving a sectioned bowl, one part of which, e.g. its wall, is stationary and the other part of which is moved, e.g. rotated

Definitions

  • the invention relates to a grinding machine with a stationary wall part and with a rotatable around a rotation axis plate member, between which a gap is formed.
  • a generic grinding machine according to the preamble of claim 1 is known from DE 196 06 117 A1 known. Such a generic grinding machine operates under centrifugal force by both filled in the walls and plate part both machined workpieces and abrasive material filled and both set by rotation of the disk part in rotation, so that a polishing effect by centrifugal force and relative velocities of workpieces and abrasive grains is effected.
  • the invention is therefore the object of further developing a grinding machine of the type mentioned, which has a longer service life.
  • the object is achieved with a grinding machine of the type mentioned in accordance with claim 1.
  • the invention thus achieves a substantially longer service life than is the case in the prior art. Replacing the ceramic ring is required only after much longer life.
  • the elastic part of the plate part may be part of a lining of the plate part, while the ceramic part is formed as a ceramic ring. Between the two opposite surfaces surfaces are provided, which are directed in particular horizontally and perpendicular to the axis of rotation; but they can also include a slight inward inclination of the horizontal, for example in the range of 10 ° to 30 °. As a rule, the axis of the grinding machine will be directed vertically.
  • the inner walls of the disk part and the wall part above and below the gap can be conically tapering from top to bottom. The taper of the inner wall to the vertical axis of rotation can be 30 ° to 45 °.
  • the Fig. 1 shows in vertical longitudinal section a preferred embodiment of a grinding machine according to the invention 1. This is constructed symmetrically about its axis of rotation A, so that substantially only the right part of the vertical section is shown.
  • the grinding machine 1 according to the invention has a stationary wall part 2. Below the same a rotatable about the axis A by means of a drive shaft 3 plate member 4 is provided below the same a rotatable about the axis A by means of a drive shaft 3 plate member 4 is provided below the same a rotatable about the axis A by means of a drive shaft 3 plate member 4 is provided. Outside of the plate part 4 can, but need not, this enclosing at the bottom of the Wandungsteils 2 with distance to the plate part 4, a stationary lower part 6 connect.
  • the parts mentioned essentially consist of metal, such as aluminum.
  • the wall part 3 and the bottom part 4 have on the inside an elastic lining 7, 8, preferably made of polyurethane.
  • the inner wall of the elastic lining 7 and thus of the wall part 2 has in the lower region a tapering inclination to the vertical axis determined by the axis of rotation A, wherein the angle of inclination may be, for example, in a range of 30 ° to 45 °.
  • This inclination follows substantially the inner wall 11 of the ceramic ring 9, the upper wall side 12 and rear wall 13 are directed substantially perpendicular to each other and perpendicular or parallel to the axis A.
  • the ceramic ring has on its lower inner side a nose-like projection 14 downwardly, in its rear region via a 16a obliquely upwardly and outwardly extending slope 16 from an edge into a horizontal or perpendicular to the axis of rotation
  • a extending outer bottom wall portion 17 passes to the outer edge 17a of the ceramic ring 9.
  • the slope 16 can also extend continuously from the edge 16a to the edge 17a, so that the horizontal area 17 is omitted.
  • the upper side 19 of the elastic lining 8 of the plate part 4 is angled substantially over the upper side 19 of the latter to the outside with an extension 18.
  • the upper surface of the extension 18 is flat and extends parallel to the underside of the nose 14a.
  • the use of the grinding machine 1 is carried out by input of workpieces, such as rings or the like., And grinding material in the interior formed by the wall 2 and the plate 4 and rotation of the plate member 4 at high speed. As a result, workpieces are ground by means of the abrasive material. During operation, abrasive material enters the region of the gap S. Due to the elasticity of the elastic lining 8, the abrasive effects on it are relatively small; they are higher on the ceramic ring, in particular in the region of its inner lower edge 21.

Description

Die Erfindung betrifft eine Schleifmaschine mit einem stationären Wandungsteil und mit einem um eine Drehachse drehbaren Tellerteil, zwischen denen ein Spalt gebildet ist.The invention relates to a grinding machine with a stationary wall part and with a rotatable around a rotation axis plate member, between which a gap is formed.

Eine gattungsgemäße Schleifmaschine gemäß dem Oberbegriff des Anspruchs 1 ist aus der DE 196 06 117 A1 bekannt. Eine derartige gattungsgemäße Schleifmaschine arbeitet unter Fliehkrafteinwirkung, indem in den durch Wandung und Tellerteil gebildeten Innenraum sowohl zu bearbeitende Werkstücke als auch Schleifmaterial eingefüllt und beide durch Drehung des Tellerteils in Drehung gesetzt werden, so dass eine Polierwirkung durch Fliehkraft-Einwirkung und Relativgeschwindigkeiten von Werkstücken und Schleifmaterialkörner bewirkt wird.A generic grinding machine according to the preamble of claim 1 is known from DE 196 06 117 A1 known. Such a generic grinding machine operates under centrifugal force by both filled in the walls and plate part both machined workpieces and abrasive material filled and both set by rotation of the disk part in rotation, so that a polishing effect by centrifugal force and relative velocities of workpieces and abrasive grains is effected.

Bei einem bekannten Gegenstand wird der Ringspalt zwischen drehbarem Tellerteil und stationärem Wandungsteil von der Oberseite her durch eine elastische Auskleidung des Wandungsteils und auf der Unterseite durch einen am Drehteller angebrachten Keramikring begrenzt, wobei die Ausbildung des Tellerteils unmittelbar unterhalb des einen rechteckigen Querschnitt aufweisenden Keramikringes sich nach unten und innen verjüngend ausgebildet ist. Während die elastische Auskleidung aufgrund ihrer Elastizität kaum einem Verschleiß durch das die Schleifmaterialkörper unterliegt, hat sich herausgestellt, dass der Keramikring bei lauten Schleifkörpern einem hohen Verschleiß ausgesetzt ist, der insbesondere dadurch bewirkt wird, dass sich Schleifmaterialkörper im Spalt festsetzen und aufgrund ihrer abrasiven Wirkung den Keramikring im Bereich seiner inneren oberen Kante abschleifen, so dass nach kurzer Zeit eine Stufe mit einer Tiefe von 3 mm bis 5 mm gebildet wird. In dieser kann sich wiederum Schleifmaterial festsetzen, das sich bis zur Unterkante der Auskleidung der stationären Wandung aufstaut und aufgrund der zwischen Wandung und Tellerteil gebildeten Relativbewegung zum weiteren Abtrag des Keramikteils beiträgt. Dieses muss daher nach kurzer Zeit ersetzt werden.In a known object, the annular gap between the rotatable plate part and the stationary wall part from the upper side by an elastic lining of the wall part and bounded on the underside by a turntable mounted on the ceramic ring, wherein the formation of the plate member immediately below the a rectangular cross-section having ceramic ring is formed downwardly and inwardly tapering. While the elastic lining hardly suffers from abrasion by the abrasive material body due to its elasticity, it has been found that the ceramic ring is exposed to high wear in the case of loud grinding bodies, which is caused in particular by the fact that abrasive material bodies settle in the gap and due to their abrasive effect Sand the ceramic ring in the area of its inner upper edge, so that after a short time a step with a depth of 3 mm to 5 mm is formed. In this grinding material can in turn set, which accumulates up to the lower edge of the lining of the stationary wall and contributes to the further removal of the ceramic part due to the relative movement formed between the wall and the plate part. This must therefore be replaced after a short time.

Der Erfindung liegt daher die Aufgabe zugrunde eine Schleifmaschine der eingangs genannten Art dahingehend weiterzuentwickeln, das eine höhere Standzeit aufweist.The invention is therefore the object of further developing a grinding machine of the type mentioned, which has a longer service life.

Erfindungsgemäß wird die genannte Aufgabe mit einer Schleifmaschine der eingangs genannten Art gelöst gemäß dem Anspruch 1.According to the invention, the object is achieved with a grinding machine of the type mentioned in accordance with claim 1.

Es hat sich überraschenderweise herausgestellt, dass die abrasive Wirkung der Schleifmaterialkörper bei einer Anordnung des Keramikteils an der unteren Seite der stationären Wandung und damit der Begrenzung des Spaltes durch den Keramikring von oben bei der unteren Begrenzung des Spaltes durch die elastische Auskleidung des drehbaren Tellerteils das Keramikteil einem viel geringeren Verschleiß ausgesetzt ist, als dies beim Stande der Technik der Fall ist. Dies mag daran liegen, dass sich zwar aufgrund der abrasiven Wirkung der Schleifmaterialkörper auch eine kleine Stufe im Bereich der inneren unteren Kante des Keramikrings ausbildet, sich Schleifmaterial aber hier nicht festsetzen und auftürmen kann, da es durch die unbeschädigte gegenüberliegende Kante der elastischen Auskleidung des Tellerteils immer wieder fortgetragen wird.It has surprisingly been found that the abrasive effect of the abrasive material body with an arrangement of the ceramic part on the lower side of the stationary wall and thus the limitation of the gap through the ceramic ring from above at the lower boundary of the gap by the elastic lining of the rotatable plate member, the ceramic part a much smaller one Wear is exposed, as is the case in the prior art. This may be due to the fact that due to the abrasive effect of the abrasive material body also forms a small step in the region of the inner lower edge of the ceramic ring, but grinding material can not fix here and pile up, as it by the undamaged opposite edge of the elastic lining of the plate part is carried away again and again.

Durch die Erfindung wird damit eine wesentlich höhere Standzeit erreicht als dies beim Stand der Technik der Fall ist. Ein Austauschen des Keramikringes ist erst nach wesentlich längerer Standzeit erforderlich.The invention thus achieves a substantially longer service life than is the case in the prior art. Replacing the ceramic ring is required only after much longer life.

Das elastische Teil des Tellerteils kann Teil einer Auskleidung des Tellerteils sein, während das Keramikteil als Keramikring ausgebildet ist. Zwischen beiden sind einander gegenüberliegenden Ebenen Oberflächen vorgesehen, die insbesondere horizontal und senkrecht zur Drehachse gerichtet sind; sie können aber auch eine leichte nach innen verlaufenden Neigung der Horizontalen beispielsweise im Bereich von 10° bis 30° einschließen. In der Regel wird die Achse der Schleifmaschine senkrecht gerichtet sein. Die Innenwandungen von Tellerteil und Wandungsteil oberhalb und unterhalb des Spaltes können von oben nach unten verengend im Wesentlichen kegelförmig ausgebildet sein. Die Kegelneigung der Innenwandung zur senkrechten Drehachse kann dabei 30° bis 45° betragen. Diese geneigte Ausbildung nicht nur des Tellerteils unmittelbar unterhalb des Spaltes, sondern die Aufnahme der nach innen unten verlaufenden Kegelneigung schon durch die Innenwandung des Wandungsteils unterstützt die Abtrag hindernde Anordnung von spaltbegrenzendem Keramikteil am oberen Wandteil und ebenfalls den Spalt an seiner Unterseite begrenzenden elastischen Teil des Drehtellers.The elastic part of the plate part may be part of a lining of the plate part, while the ceramic part is formed as a ceramic ring. Between the two opposite surfaces surfaces are provided, which are directed in particular horizontally and perpendicular to the axis of rotation; but they can also include a slight inward inclination of the horizontal, for example in the range of 10 ° to 30 °. As a rule, the axis of the grinding machine will be directed vertically. The inner walls of the disk part and the wall part above and below the gap can be conically tapering from top to bottom. The taper of the inner wall to the vertical axis of rotation can be 30 ° to 45 °. This inclined training not only the plate part immediately below the gap, but the inclusion of the inwardly extending cone slope already through the inner wall of the wall part supports the removal hindering arrangement of crevice delimiting ceramic part on the upper wall part and also the gap on his Bottom bounding elastic part of the turntable.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus den Ansprüchen aus der nachfolgenden Beschreibung, in der ein Ausführungsbeispiel der Erfindung unter Bezugnahme auf die Zeichnung im einzelnen erläutert ist. Dabei zeigt:

Fig. 1
einen Vertikalschnitt durch eine bevor- zugte Ausführungsform der erfindungsgemäße Schleifmaschine, teilweise geschnitten; und
Fig. 2
eine vergrößerte Detaildarstellung des Ge- genstands der Fig. 1.
Further advantages and features of the invention will become apparent from the claims from the following description in which an embodiment of the invention with reference to the drawings is explained in detail. Showing:
Fig. 1
a vertical section through a preferred embodiment of the grinding machine according to the invention, partially cut; and
Fig. 2
an enlarged detail of the subject of the Fig. 1 ,

Die Fig. 1 zeigt in vertikalem Längsschnitt eine bevorzugte Ausführungsform einer erfindungsgemäßen Schleifmaschine 1. Diese ist um ihre Drehachse A symmetrisch aufgebaut, so dass im Wesentlichen lediglich der rechte Teil des Vertikalschnittes dargestellt ist. Die erfindungsgemäße Schleifmaschine 1 weist ein stationäres Wandungsteil 2 auf. Unterhalb desselben ist ein um die Achse A mittels einer Antriebswelle 3 drehbares Tellerteil 4 vorgesehen. Außerhalb des Tellerteils 4 kann sich, muss sich aber nicht, dieses umschließend an der Unterseite des Wandungsteils 2 mit Abstand zum Tellerteil 4 ein stationäres Unterteil 6 anschließen. Die genannten Teile bestehen im Wesentlichen aus Metall, wie Aluminium. Das Wandungsteil 3 und das Bodenteil 4 weisen innenseitig eine elastische Auskleidung 7, 8, vorzugsweise aus Polyurethan, auf. An der Unterseite des Wandungsteils 2 ist ein Keramikring 9 vorgesehen, der fest mit dem Wandungsteil 2 verbunden ist.The Fig. 1 shows in vertical longitudinal section a preferred embodiment of a grinding machine according to the invention 1. This is constructed symmetrically about its axis of rotation A, so that substantially only the right part of the vertical section is shown. The grinding machine 1 according to the invention has a stationary wall part 2. Below the same a rotatable about the axis A by means of a drive shaft 3 plate member 4 is provided. Outside of the plate part 4 can, but need not, this enclosing at the bottom of the Wandungsteils 2 with distance to the plate part 4, a stationary lower part 6 connect. The parts mentioned essentially consist of metal, such as aluminum. The wall part 3 and the bottom part 4 have on the inside an elastic lining 7, 8, preferably made of polyurethane. On the underside of the wall part 2, a ceramic ring 9 is provided which is fixedly connected to the wall part 2.

Die Innenwandung der elastischen Auskleidung 7 und damit des Wandungsteils 2 weist im unteren Bereich eine sich verjüngende Neigung zur durch die Drehachse A bestimmten Vertikalen auf, wobei der Neigungswinkel beispielsweise in einem Bereich von 30° bis 45° liegen kann. Dieser Neigung folgt im wesentlichen die Innenwandung 11 des Keramikrings 9, dessen obere Wandungsseite 12 und rückwärtige Wandung 13 im wesentlichen senkrecht zueinander und senkrecht bzw. parallel zur Achse A gerichtet sind. Der Keramikring weist an seiner unteren inneren Seite einen nasenartigen Vorsprung 14 nach unten auf, der in seinem rückwärtigen Bereich über eine von eine Kante 16a aus von unten schräg nach oben und außen verlaufenden Schräge 16 in einen horizontalen bzw. sich senkrecht zur Drehachse A erstreckenden äußeren unteren Wandungsbereich 17 bis zur Außenkante 17a des Keramikrings 9 übergeht. Die Schräge 16 kann auch von der Kante 16a bis zur Kante 17a durchgehend verlaufen, so dass der horizontale Bereich 17 entfällt.The inner wall of the elastic lining 7 and thus of the wall part 2 has in the lower region a tapering inclination to the vertical axis determined by the axis of rotation A, wherein the angle of inclination may be, for example, in a range of 30 ° to 45 °. This inclination follows substantially the inner wall 11 of the ceramic ring 9, the upper wall side 12 and rear wall 13 are directed substantially perpendicular to each other and perpendicular or parallel to the axis A. The ceramic ring has on its lower inner side a nose-like projection 14 downwardly, in its rear region via a 16a obliquely upwardly and outwardly extending slope 16 from an edge into a horizontal or perpendicular to the axis of rotation A extending outer bottom wall portion 17 passes to the outer edge 17a of the ceramic ring 9. The slope 16 can also extend continuously from the edge 16a to the edge 17a, so that the horizontal area 17 is omitted.

Die Oberseite 19 der elastischen Auskleidung 8 des Tellerteils 4 ist im wesentlichen über die Oberseite 19 des letzteren nach außen mit einem Fortsatz 18 abgewinkelt. Die obere Fläche des Fortsatzes 18 ist eben und erstreckt sich parallel zur Unterseite der Nase 14a.The upper side 19 of the elastic lining 8 of the plate part 4 is angled substantially over the upper side 19 of the latter to the outside with an extension 18. The upper surface of the extension 18 is flat and extends parallel to the underside of the nose 14a.

Der Einsatz der Schleifmaschine 1 erfolgt durch Eingabe von Werkstücken, wie Ringen oder dgl., und Schleifmaterial in den durch die Wandung 2 und den Teller 4 gebildeten Innenraum sowie Drehung des Tellerteils 4 mit hoher Geschwindigkeit. Hierdurch werden Werkstücke mittels des Schleifmaterials geschliffen. Beim Betrieb gelangt Schleifmaterial in den Bereich des Spaltes S. Aufgrund der Elastizität der elastischen Auskleidung 8 sind die abrasiven Einwirkungen auf diese relativ gering; sie sind höher auf den Keramikring, insbesondere im Bereich seiner inneren unteren Kante 21.The use of the grinding machine 1 is carried out by input of workpieces, such as rings or the like., And grinding material in the interior formed by the wall 2 and the plate 4 and rotation of the plate member 4 at high speed. As a result, workpieces are ground by means of the abrasive material. During operation, abrasive material enters the region of the gap S. Due to the elasticity of the elastic lining 8, the abrasive effects on it are relatively small; they are higher on the ceramic ring, in particular in the region of its inner lower edge 21.

Es hat sich herausgestellt, dass der abrasive Einfluss und damit der Abtrag des Keramikringes bei der erfindungsgemä-Ben Ausgestaltung wesentlich geringer ist, als dies beim Stand der Technik der Fall ist.It has been found that the abrasive influence and thus the removal of the ceramic ring in the embodiment according to the invention is substantially lower than is the case in the prior art.

Claims (6)

  1. Grinding machine comprising a stationary wall part (2) and a plate part, which rotates about an axis of rotation (A), between which a gap (S) is formed, characterized in that the gap (S) is limited from above by a ceramic part (9) and from below by an elastic part (8), wherein the ceramic part (9) has a nose-like projection (14), facing downwardly and the elastic part has a flat surface (19).
  2. Grinding machine according to claim 1, characterized in that the elastic part is part of a lining (8) of the plate part (4).
  3. Grinding machine according to claim 1 or 2, characterized in that the ceramic part (9) is formed as a ceramic ring disposed in the lower region of the wall part (2).
  4. Grinding machine according to any one of the preceding claims, characterized in that the axis of rotation (A) is vertical.
  5. Grinding machine according to any one of the preceding claims, characterized in that an inner wall of said plate member (4) and an inner wall (2) of said wall member taper from a top towards a bottom above an below said gap (S) in a substantially conical manner.
  6. Grinding machine of claim 5, wherein said taper defines an angle of inclination relative to said axis of rotation of between 30° and 45°.
EP01124844A 2000-11-03 2001-10-18 Grinding machine Expired - Lifetime EP1207010B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20018805U DE20018805U1 (en) 2000-11-03 2000-11-03 Grinding machine
DE20018805U 2000-11-03

Publications (3)

Publication Number Publication Date
EP1207010A2 EP1207010A2 (en) 2002-05-22
EP1207010A3 EP1207010A3 (en) 2003-12-10
EP1207010B1 true EP1207010B1 (en) 2010-12-01

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EP01124844A Expired - Lifetime EP1207010B1 (en) 2000-11-03 2001-10-18 Grinding machine

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US (1) US6656027B2 (en)
EP (1) EP1207010B1 (en)
DE (2) DE20018805U1 (en)

Families Citing this family (6)

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Publication number Priority date Publication date Assignee Title
JP2005021810A (en) * 2003-07-02 2005-01-27 Tipton Mfg Corp Coating apparatus
DE102013204816A1 (en) * 2013-03-19 2014-09-25 Rösler Holding GmbH & Co. KG SLIDING MACHINE AND PROCESSING FOR COLUMN ADJUSTMENT
US9993906B1 (en) 2015-01-19 2018-06-12 Berry's Manufacturing of Utah, Inc. Vibratory tumbler
CN104608043B (en) * 2015-02-10 2018-01-23 深圳市佳易研磨有限公司 A kind of seamless polisher lapper of Scroll-tupe
CN204525132U (en) * 2015-04-23 2015-08-05 浙江湖磨抛光磨具制造有限公司 Seamless flowing light finishing machine
CN105538122A (en) * 2016-01-21 2016-05-04 浙江湖磨抛光磨具制造有限公司 Seamless dry type flowing polishing method and flowing polishing machine

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US5012620A (en) * 1987-10-06 1991-05-07 Roto-Finish Company, Inc. Centrifugal finishing apparatus embodying improved seal and method
DE3802542C1 (en) * 1988-01-28 1989-08-24 Max Spaleck Gmbh & Co Kg, 4290 Bocholt, De
US5279074A (en) * 1990-08-28 1994-01-18 The Grav-I-Flo Corporation Centrifugal disk finishing apparatus utilizing dry media
US5476415A (en) * 1993-10-22 1995-12-19 Sintobrator, Ltd. Dry barrel finishing machine
DE19606117A1 (en) * 1995-11-15 1997-05-22 Dannemann Peter Centrifugal force-slide grinding machine
JP3062800B2 (en) * 1996-02-26 2000-07-12 株式会社チップトン Eddy barrel processing machine
JP2913473B2 (en) * 1997-01-31 1999-06-28 株式会社チップトン Eddy current barrel processing machine having gap adjusting function, method for forming escape layer, and gap adjusting method
DE29702859U1 (en) * 1997-02-19 1998-03-19 Gegenheimer Helmut Centrifugal vibratory grinding machine
DE19843366B4 (en) * 1998-09-22 2005-07-21 Helmut Gegenheimer Centrifugal vibratory finishing machine with gap adjustment

Also Published As

Publication number Publication date
DE50115725D1 (en) 2011-01-13
EP1207010A2 (en) 2002-05-22
US6656027B2 (en) 2003-12-02
US20020055327A1 (en) 2002-05-09
DE20018805U1 (en) 2001-01-04
EP1207010A3 (en) 2003-12-10

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