EP1198325A1 - Hohlkolben für eine kolbenmaschine und verfahren zum herstellen eines hohlkolbens - Google Patents
Hohlkolben für eine kolbenmaschine und verfahren zum herstellen eines hohlkolbensInfo
- Publication number
- EP1198325A1 EP1198325A1 EP00943956A EP00943956A EP1198325A1 EP 1198325 A1 EP1198325 A1 EP 1198325A1 EP 00943956 A EP00943956 A EP 00943956A EP 00943956 A EP00943956 A EP 00943956A EP 1198325 A1 EP1198325 A1 EP 1198325A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mandrel
- piston
- peripheral wall
- section
- annular cavity
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49249—Piston making
- Y10T29/49252—Multi-element piston making
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49249—Piston making
- Y10T29/49256—Piston making with assembly or composite article making
Definitions
- the invention relates to a hollow piston for a piston machine or to a method for producing such a hollow piston according to the preamble of claims 1, 6, 8 and 13 respectively.
- Hollow piston has an annular hole between the peripheral wall and the central mandrel, which is machined by deep drilling. This prescribes a labor-intensive and time-consuming production outlay, which means that relatively high production costs are required. It should be noted that the production of this known
- this hollow piston has a ball joint part in the form of a joint ball, which extends from the base section of the hollow piston into the
- Cavity extends in opposite axial direction.
- DE 26 53 867 AI describes a hollow piston and a method for its production, which is formed from two separate hollow piston parts, namely a first piston part comprising the base section, the peripheral wall and the ball joint part, and a cover and one piece extending therefrom central mandrel containing second piston part.
- the cover engages with a peg-shaped projection on the free edge of the peripheral wall in the hollow piston and the free end of the mandrel engages in a recess in the base section, the two piston parts being joined together by soldering ,
- the peripheral wall of the first piston part and, on the other hand, the mandrel of the other piston part are each made in one piece by extrusion on the associated piston part molded, however, in this known embodiment, two separate molding processes in two separate molding tools are required.
- the invention is based on the object of designing a hollow piston of the type specified at the outset in such a way that a stable construction is achieved while ensuring simple or inexpensive production, and specifying a corresponding production process.
- the peripheral wall and the central mandrel are formed on the base section of the hollow piston without cutting. This not only avoids the loss of material caused by machining deep drilling, but also circumferential grooves in the inner surface of the peripheral wall and the outer surface of the mandrel that occur during deep drilling are avoided, as a result of which the hollow piston obtains substantially greater stability because the peripheral grooves reduce the resistance of the hollow piston to bending loads is considerable.
- the integral molding of the peripheral wall and the central mandrel can be carried out more easily and quickly in terms of production technology, without the chips having to be disposed of.
- the peripheral wall and the central mandrel can alternatively also be formed in that these parts consist of sintered material with the base section and are shaped and sintered with the ring hole extending between the peripheral wall and the mandrel.
- a sintered material is suitable as a sliding material, which is due to the fact that the pores present in a sintered material form lubricant pockets which provide good lubrication and a proportionate ratio ensure low wear of the sliding surfaces.
- the hollow piston according to the invention as claimed in claim 6 consists of two cup-shaped blank sections which, with regard to the shape and size of their inner shape, i.e. the shape of the cavity halves are identical. This makes it possible to use the same tools and manufacturing measures, at least to design the internal shapes of the hollow pistons. As a result, the manufacturing process is significantly simplified and the manufacturing costs can be considerably reduced.
- Fig. 1 a hollow piston according to the invention for a piston machine in axial section
- Fig. la, lb and lc three prefabricated parts which are further processed into a piston blank
- Fig. Ld a stabilized by a support disc
- Fig. 2 shows a piston blank in a modified
- Design; 3 shows a prefabrication part for the hollow piston in axial section with an indicated fiber course according to the prior art
- FIG. 4 shows a prefabricated part according to the invention for the hollow piston with an indicated fiber course in axial section
- FIG. 6 shows a prefabricated part according to the invention for the hollow piston in axial section
- FIG. 7 shows a hollow piston according to the invention in a modified configuration in axial section
- FIG. 7c shows a piston blank for the hollow piston according to FIG. 7 in axial section
- Fig. 8 shows a hollow piston according to the invention in the axial
- FIG. 8c shows a piston blank in axial section for a hollow piston according to FIG. 8.
- the hollow piston generally designated 1, with a cylindrical outer surface 2 has a base section 3, of which a joint part 4 extends in one longitudinal direction, in the present exemplary embodiment a joint ball 5 with a ball neck 5a, and in the other longitudinal direction o extend a hollow cylindrical peripheral wall 6 and a cylindrical central mandrel 7, which are connected to one another at their ends facing away from the base section 3 by a cover 8. Between the peripheral wall 6 and the mandrel 7 there is an annular cavity 9 which is closed on all sides.
- the end face 11 has a frustoconical shape at the front free end of the hollow piston 1. However, it can also have a different shape, for example a radial plane end face.
- the hollow piston 1 is assembled and manufactured from two or three parts, namely a base body part 1 a according to FIG. 1 a, a cover part 1 b according to FIG. 1 b and optionally a centering disc 1 c according to FIG. 1 c.
- the base body part la and the cover part lb are axially placed against one another at a dividing joint 12, which is located in the longitudinal region of the annular cavity 9, for the purpose of further development to the piston blank le according to FIG. Le, wherein they are preferably a distance a from the cover 8 and also a distance b from the base section 3 has.
- a section of the annular cavity 9 extends both into the base body part la and into the cover part 1b, which results in peripheral wall sections 6a, 6b and mandrel sections 7a, 7b which face one another.
- the centering disk lc is inserted between the peripheral wall 6b and the mandrel section 7b of the base part la (see FIG. 1d), its central hole 13 and its outer diameter being adapted to the cross-sectional size of the mandrel section 7b and the inner diameter of the peripheral wall section 6b.
- the diameter of the mandrel section 7b can be slightly tapered (not shown) or the inner diameter of the peripheral wall section 6b can be slightly expanded, so that there is a contact shoulder 14 for the centering disk lc at a small axial distance b from the free end of the base part la.
- the centering disc 1c has a through hole 13a, preferably on its outer edge, for example a notch, which has a flow passage between the two the centering disc lc ensures separate cavity sections.
- the outer diameter of the base part la and the cover part lb are each prefabricated with an oversize x with respect to the diameter d of the hollow piston 1.
- the base section 3 is extended on the base part la by an axial dimension c, which is dimensioned so long that the joint ball 5 with its ball neck 5a can be formed therefrom, e.g. by cutting off.
- the hollow piston 1 or the base body part 1 a and the cover part 1 b consist of metal, in particular steel, which is suitable for extrusion.
- the base body part la and the lid part 1b are connected to one another by welding, preferably by friction welding, when they bear against the surfaces of the division joint 12, which can be achieved by rotating one part relative to the other part, as is known per se.
- welding preferably by friction welding
- the peripheral wall sections 6b and the mandrel section 7b in the area of the dividing joint 12 are heated to such an extent that they melt and weld to one another in the area of the dividing joint 12, welding beads 15 being able to form on the inside and outside.
- the mandrel section 7b is supported radially by the centering disk 1c.
- Cover part 1b results in a piston blank le according to FIG. Le, in which the radial and axial oversizes x are illustrated by a dash-dot representation of the final piston shape.
- FIG. 2 shows a piston blank le that differs from the above-described embodiment only as a result distinguishes that the dividing line 12 is offset more towards the free end of the peripheral wall 6, for example in the vicinity of the cover 8 or up to the cover 8.
- the base body part la and the lid part 1b are preferably one-piece molded parts, i. H. their peripheral wall sections 6a, 6b and mandrel sections 7a, 7b are each integrally formed on the associated base section 3 or cover 8. Preferred measures for this can e.g. Sintering and extrusion, in particular cold extrusion.
- the base body part la and the cover part lb are formed by the sintered material being introduced into a corresponding cavity of a mold and sintered.
- Extrusion takes place in known extrusion tools, each with a corresponding shape, the circumferential wall section 6b and the mandrel section 7b and optionally also the circumferential wall section 6a and the mandrel section 7a each being formed on an unillustrated blank by extrusion.
- a sintered part additionally being well suited for a sliding function due to pores contained in the sintered material, which act as lubrication pockets in functional operation.
- the extrusion in each case results in a fiber region 16 which runs in a U-shape in the base region of the cavity 9, as shown in FIG. 4.
- This fiber course also results on the inner lateral surface of the cavity 9, which is illustrated in FIG. 6 by longitudinal lines and the reference number 16a.
- a cavity 9 produced by chip removal for example by deep drilling, has a broken or axially opening fiber course 16b in the base region of the cavity 9, which is due to the production of the starting material, for example by rolling, calibration or drawing.
- the inner wall of the cavity 9 is transverse to the longitudinal direction during machining, for example by deep drilling extending grooves 16c, which - like the fiber path 16b interrupted in the base region of the cavity 9
- Another advantage is that no material can be cut in both of the above-described manufacturing measures in order to achieve the desired shape of the annular cavity 9.
- the existing material is thus optimally used.
- At least one base body part la and a cover part lb by integral molding with a radial oversize x.
- the dividing joint 12 in which the dividing joint 12 is located in the vicinity of the inside of the cover part 1b, it may be practical within the scope of the invention to incorporate the peripheral wall section 6b and the mandrel section 7b of the cover part 1b by machining, e.g. by drilling or milling.
- Longer axial sections of the peripheral wall 6 and the mandrel 7, on the other hand are advantageously formed in one piece, in particular by sintering or extrusion, preferably cold extrusion.
- at least one centering disc lc is formed, in particular by stamping from a board.
- the machining of the surface of the piston blank ld can also be carried out in several steps. So it is e.g. possible, after welding and before hardening, the shape corresponding to the final shape of the hollow piston 1 according to FIG. 1, e.g. by turning or grinding, to produce an oversize at least on the outer surface 18 and after the above-described hardening the entire outer surface or only the hollow cylindrical outer surface e.g. to be finished by grinding, whereby the joint ball 5 can be finished before hardening.
- FIGS. 7 to 7c differs from the above-described embodiment in that the base body part la and the cover part lb are of identical design at least in the region of their peripheral wall sections 6b and mandrel sections 7b or cavity sections are, preferably also on the outside and thus the same overall design and can therefore be identical parts. Since the length of the peripheral wall sections 6a, 6b and mandrel sections 7b is reduced due to the central arrangement of the division joint 12 with respect to the annular cavity 9 and these parts are more stable due to this reduction, a centering disk 1c can be omitted, as shown in FIGS. 7 and 7c.
- FIGS. 8 to 8c differs from the prescribed embodiments in that the cover part 1b is formed by a disc with a central hole 19, in particular a through hole, which is adapted to the cross-sectional size of the mandrel 7, the mandrel 7 extending into the hole 19 and the peripheral wall 6 extending up to the disk-shaped cover part 1b.
- the mandrel 7 can extend to the end face of the cover part 1b, as shown in FIG. 8c.
- the cover part 1b can be connected to the base body part la by soldering or welding, e.g.
- the parts are preferably connected to one another by laser welding. Otherwise, the hollow piston 1 can be produced in this embodiment using the method steps already described.
- the cover part lb can e.g. be formed in one piece by sintering, or it can be machined, in particular by turning.
- the hollow piston 1 can form a piston arrangement 24 in all the exemplary embodiments with a sliding shoe 22, which is only indicated in FIG. 1 and is connected to the hollow piston 1 by an articulated connection 23 Support and an axial Drive of the hollow piston 1 enables.
- the slide shoe 22 has a hemispherical joint recess 25 on its side facing the hollow piston 1, the recess edge 26 of which is extended beyond the equator 27 of the joint recess 25 and into one Articulated ball 5 behind form is crimped while ensuring a game of movement.
- the surface of the sliding shoe 22 opposite the joint recess 25 is a preferably flat sliding surface 28, which is used for articulated support on the swash plate.
- the slide shoe 22 consists of metal, for example a copper or brass alloy such as bronze, or of steel.
- the recess edge 26 can be cold-beaded or hot-beaded. This flanging process can take place before the finishing of the outer surface 18 of the hollow piston or as the last processing step after the finishing of the outer surface 18 of the hollow piston 1.
- a bore section 21a connected therewith is also present in the sliding shoe 22 and opens out on the sliding surface 28. Furthermore, the sliding shoe 22 has a flange 29 which projects radially beyond a base section 31 which has the joint recess 25.
- the articulated connection 23 can also be formed in that the articulated recess 25 with the recess edge 26 is arranged on the hollow piston 1 and extends in the direction of the sliding block 22, and the sliding block 22 has the joint ball 5 which is in the joint recess 25 is pivotally mounted.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02023313A EP1287944B1 (de) | 1999-07-21 | 2000-06-30 | Verfahren zum Herstellen eines Hohlkolbens für eine Kolbenmaschine |
EP02023312A EP1288495B1 (de) | 1999-07-21 | 2000-06-30 | Hohlkolben für eine Kolbenmaschine |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19934216 | 1999-07-21 | ||
DE19934216A DE19934216A1 (de) | 1999-07-21 | 1999-07-21 | Hohlkolben für eine Kolbenmaschine und Verfahren zum Herstellen eines Hohlkolbens |
PCT/EP2000/006140 WO2001007201A1 (de) | 1999-07-21 | 2000-06-30 | Hohlkolben für eine kolbenmaschine und verfahren zum herstellen eines hohlkolbens |
Related Child Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02023312A Division EP1288495B1 (de) | 1999-07-21 | 2000-06-30 | Hohlkolben für eine Kolbenmaschine |
EP02023313A Division EP1287944B1 (de) | 1999-07-21 | 2000-06-30 | Verfahren zum Herstellen eines Hohlkolbens für eine Kolbenmaschine |
EP02023312.8 Division-Into | 2002-10-17 | ||
EP02023313.6 Division-Into | 2002-10-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1198325A1 true EP1198325A1 (de) | 2002-04-24 |
EP1198325B1 EP1198325B1 (de) | 2003-10-01 |
Family
ID=7915557
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02023312A Expired - Lifetime EP1288495B1 (de) | 1999-07-21 | 2000-06-30 | Hohlkolben für eine Kolbenmaschine |
EP02023313A Expired - Lifetime EP1287944B1 (de) | 1999-07-21 | 2000-06-30 | Verfahren zum Herstellen eines Hohlkolbens für eine Kolbenmaschine |
EP00943956A Expired - Lifetime EP1198325B1 (de) | 1999-07-21 | 2000-06-30 | Hohlkolben für eine kolbenmaschine und verfahren zum herstellen eines hohlkolbens |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02023312A Expired - Lifetime EP1288495B1 (de) | 1999-07-21 | 2000-06-30 | Hohlkolben für eine Kolbenmaschine |
EP02023313A Expired - Lifetime EP1287944B1 (de) | 1999-07-21 | 2000-06-30 | Verfahren zum Herstellen eines Hohlkolbens für eine Kolbenmaschine |
Country Status (4)
Country | Link |
---|---|
US (1) | US6662709B1 (de) |
EP (3) | EP1288495B1 (de) |
DE (4) | DE19934216A1 (de) |
WO (1) | WO2001007201A1 (de) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6314864B1 (en) * | 2000-07-20 | 2001-11-13 | Sauer-Danfoss Inc. | Closed cavity piston for hydrostatic units |
DE10206728B4 (de) † | 2002-02-18 | 2006-08-24 | Brueninghaus Hydromatik Gmbh | Hohlkolben und Verfahren zu dessen Herstellung durch Sintern |
US6732633B1 (en) * | 2003-01-14 | 2004-05-11 | Sauer-Danfoss Inc. | Reduced dead volume hollow piston |
DE10306792B4 (de) * | 2003-01-23 | 2007-03-22 | Valeo Compressor Europe Gmbh | Kolben, insbesondere für einen Axialkolben-Verdichter, und Verfahren zur Herstellung desselben |
US6994014B2 (en) * | 2004-06-29 | 2006-02-07 | Sauer-Danfoss Inc. | Closed cavity piston for hydrostatic power units and method of manufacturing the same |
JP4110479B2 (ja) * | 2004-09-28 | 2008-07-02 | アイシン精機株式会社 | 弁開閉時期制御装置 |
DE102004061863A1 (de) * | 2004-12-22 | 2006-07-06 | Brueninghaus Hydromatik Gmbh | Kolben für Axialkolbenmaschine in Schrägachsenbauweise und Verfahren zur Herstellung solcher Kolben |
US7313997B2 (en) * | 2006-05-26 | 2008-01-01 | Visteon Global Technologies, Inc. | Copper alloy piston shoe |
US7654240B2 (en) * | 2006-08-18 | 2010-02-02 | Caterpillar Inc. | Engine piston having an insulating air gap |
DE102006060015A1 (de) * | 2006-12-19 | 2008-06-26 | Robert Bosch Gmbh | Hohlkolben für eine Axialkolbenmaschine |
DE102008060841B4 (de) | 2008-12-05 | 2021-10-28 | Robert Bosch Gmbh | Hohlkolben für eine Kolbenmaschine |
DE102009056903A1 (de) | 2009-12-03 | 2011-06-09 | Danfoss A/S | Hydraulische Kolbenmaschine, insbesondere wasserhydraulische Maschine |
CN102335812B (zh) * | 2010-07-20 | 2016-08-03 | 台州市百达电器有限公司 | 一种往复式压缩机活塞的制作方法 |
CN102865221A (zh) * | 2012-10-07 | 2013-01-09 | 四川省宜宾普什驱动有限责任公司 | 一种空心柱塞 |
US9664184B2 (en) * | 2013-05-22 | 2017-05-30 | Hydac Drive Center Gmbh | Axial piston pump having a swash-plate type construction |
DE102013211888A1 (de) * | 2013-06-24 | 2014-12-24 | Robert Bosch Gmbh | Hohlkolben für eine Schrägscheibenmaschine und Schrägscheibenmaschine |
DE102017119967A1 (de) * | 2017-08-31 | 2019-02-28 | Schaeffler Technologies AG & Co. KG | Herstellungsverfahren, Kolbenrohling, Kolben sowie Axialkolbenmaschine mit dem Kolben |
JP7228994B2 (ja) * | 2018-11-15 | 2023-02-27 | 株式会社小松製作所 | ピストン及び油圧ポンプ・モータ |
CN109926801B (zh) * | 2019-04-16 | 2024-04-09 | 四川坤成润科技有限公司 | 一种空芯柱塞的加工方法 |
CN113878085B (zh) * | 2021-10-08 | 2024-04-26 | 江苏龙城精锻集团有限公司 | 一种高压柱塞泵中空柱塞锻件及其一步成形工艺和模具 |
CN113878086B (zh) * | 2021-10-08 | 2024-04-26 | 江苏龙城精锻集团有限公司 | 一种高压柱塞泵中空柱塞锻件及其二步成形工艺和模具 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3319575A (en) * | 1965-06-14 | 1967-05-16 | Sundstrand Corp | Piston |
DE2653867A1 (de) * | 1976-11-26 | 1978-06-01 | Linde Ag | Hohlkolben und verfahren zu dessen herstellung |
US4494448A (en) * | 1982-02-23 | 1985-01-22 | Vsesojuzny Nauchno-Issledovatelsky I Proektno-Konstruktorsky Institut Promyshelennykh Gidroprivodov I Girodoavtomatiki | Composite piston of positive displacement hydraulic machine and method for manufacturing same |
DE3406782A1 (de) * | 1983-02-25 | 1984-08-30 | Linde Ag, 6200 Wiesbaden | Kolben fuer eine hydrostatische maschine |
DE4108786C2 (de) * | 1991-03-18 | 1995-01-05 | Hydromatik Gmbh | Leichtkolben für hydrostatische Axial- und Radialkolbenmaschinen |
US5642654A (en) * | 1994-09-01 | 1997-07-01 | Sundstrand Corporation | Piston and method of manufacturing the same |
DE19620167C2 (de) * | 1996-05-20 | 1998-11-12 | Brueninghaus Hydromatik Gmbh | Hohlkolben mit radial verschweißtem Deckel |
-
1999
- 1999-07-21 DE DE19934216A patent/DE19934216A1/de not_active Ceased
-
2000
- 2000-06-30 EP EP02023312A patent/EP1288495B1/de not_active Expired - Lifetime
- 2000-06-30 DE DE50003918T patent/DE50003918D1/de not_active Expired - Fee Related
- 2000-06-30 EP EP02023313A patent/EP1287944B1/de not_active Expired - Lifetime
- 2000-06-30 EP EP00943956A patent/EP1198325B1/de not_active Expired - Lifetime
- 2000-06-30 WO PCT/EP2000/006140 patent/WO2001007201A1/de active IP Right Grant
- 2000-06-30 DE DE50012872T patent/DE50012872D1/de not_active Expired - Lifetime
- 2000-06-30 US US10/019,737 patent/US6662709B1/en not_active Expired - Fee Related
- 2000-06-30 DE DE50012944T patent/DE50012944D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0107201A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1287944A3 (de) | 2003-04-23 |
DE50012872D1 (de) | 2006-07-06 |
DE50003918D1 (de) | 2003-11-06 |
US6662709B1 (en) | 2003-12-16 |
EP1287944B1 (de) | 2006-06-07 |
EP1287944A2 (de) | 2003-03-05 |
EP1288495A3 (de) | 2003-04-23 |
EP1288495A2 (de) | 2003-03-05 |
DE50012944D1 (de) | 2006-07-20 |
EP1198325B1 (de) | 2003-10-01 |
DE19934216A1 (de) | 2001-02-01 |
WO2001007201A1 (de) | 2001-02-01 |
EP1288495B1 (de) | 2006-05-31 |
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