EP0904869B1 - Vorrichtung zum Innenhochdruckumformen von Hohlprofilen - Google Patents
Vorrichtung zum Innenhochdruckumformen von Hohlprofilen Download PDFInfo
- Publication number
- EP0904869B1 EP0904869B1 EP98115208A EP98115208A EP0904869B1 EP 0904869 B1 EP0904869 B1 EP 0904869B1 EP 98115208 A EP98115208 A EP 98115208A EP 98115208 A EP98115208 A EP 98115208A EP 0904869 B1 EP0904869 B1 EP 0904869B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support ring
- stop
- sealing
- ring
- hollow section
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 75
- 238000003780 insertion Methods 0.000 claims description 22
- 230000037431 insertion Effects 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 10
- 229910000639 Spring steel Inorganic materials 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims 1
- 239000000806 elastomer Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000004952 Polyamide Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/045—Closing or sealing means
Definitions
- the invention relates to a device for hydroforming of hollow profiles according to the preamble of the claim 1.
- a generic device is known from DE 43 09 680 A1.
- a sealing head of an axial plunger is the one to be sealed in the engraving of a hydroforming tool inserted hollow profile until a radial Shoulder of the sealing head on the front of the hollow profile comes into play.
- the sealing head bears on its conical trained end two sealing rings in the direction of insertion from a baffle plate attached to the front of the end are secured against slipping out.
- the near the flapper Sealing ring is an O-ring made of a soft rubber-elastic material, while the baffle plate seal made of polyamide exists and has a trapezoidal profile cross section.
- the baffle plate is axial on the face of the sealing head screwed movably and has a bent edge, with which the O-ring can be loaded.
- the sealing rings are like this trained that with little play to the hollow profile the sealing head can be inserted without hindrance.
- the seal after filling the hollow profile with the pressure fluid the pressure fluid channel formed in the sealing head due to the created internal high pressure, which the baffle against presses the O-ring, which due to the slipping up on the contact surface that widens conically towards the axial ram spread the seal head end and thereby radially against the Hollow profile to be pressed.
- the high pressure also affects the polyamide ring of the contact surface slide up, which is then through its wedge-like formation between the contact surface and the hollow profile jammed and by the pressure on the Hollow profile for additional sealing of the hollow profile leads.
- the polyamide ring is placed in this position a stop for the O-ring towards the axial punch, so opposite to the direction of insertion, causing the O-ring by the axial pressure on the polayamide ring by means of the internal high pressure baffle plate deformed elastically and is driven radially apart.
- the invention has for its object a generic To further develop the device so that in a simple manner and a reliable fluid high pressure density without deformation of the hollow profile Sealing is achieved so that a reliable process Forming with regard to stable pressure conditions at Hydroforming is made possible.
- a relative movement of the support part to the sealing arrangement enables this being a stationary with respect to the hollow profile Position takes while the carrier part continues into the hollow profile can be inserted axially further.
- the fixed support ring opposes, by loading the Support ring and the sealing element held thereon by means an actuating means rigidly attached to the carrier part radial expansion of the sealing element almost automatically triggered.
- the sealing element is against the inner wall pressed of the hollow profile, whereby a sufficient fluid high pressure density Sealing of the hollow profile interior against the external environment is reached. This happens before filling so that no leaks occur.
- the fluid high pressure is held at a stable height during forming, since the Preserve the quality of the seal until the end of the forming process remains.
- one is reliable in terms of constant pressure Forming of the hollow profile possible.
- no deformation of the hollow profile end since here only a soft one Radial seal from the inside to the inner wall of the hollow profile is pressed, whereby the hollow profile remains true to size and a any trimming of the squeezed hollow profile in the docking area of the sealing head on the hollow profile after the forming process resource-saving and process time-saving.
- the hollow profile is not squeezed, the withdrawal forces become of the axial ram considerably reduced.
- An internal high-pressure forming tool 1 is shown in the figure, in the engraving 2 a hollow profile 3 is introduced, the internal high-pressure forming tool 1 in the closed position located.
- a sealing head 4 of a hydraulic actuated axial plunger inserted, by means of which the material of the hollow profile 3 during the forming process for reliable forming with a high degree of forming in the direction of the forming location can be replenished.
- the sealing head 4 comprises a hollow cylindrical support member 5, the cavity of which one Pressure fluid channel 6 for introducing the pressure fluid into the hollow profile 3 forms and with a high-pressure fluid generating system is fluidly connected, a sealing arrangement 7, which on the Outer peripheral surface 8 of the carrier part 5 is held axially displaceable and a stop plate 9 facing away from the insertion direction End face 10 of the carrier part 5 screwed is.
- the sealing arrangement 7 includes one with its peripheral shape the circumferential contour of the hollow profile 3 following annular Stop body 11, a support ring 12, an outer that Sealing element forming soft rubber-elastic O-ring 13 and an inner O-ring 14 made of a material with similar Properties like the O-ring 13.
- the O-ring 13 can also consist of a spring steel.
- the stop body 11 lies with a little play with it Circumferential surface 15 all around on the engraving 2 of the forming tool 1 and with its inner wall 16 on the outer peripheral surface 8 of the carrier part 5.
- the stop body 11 On its in the direction of insertion End face 17, the stop body 11 has a coaxial lying sleeve-shaped extension 18 smaller diameter than that of the stop body 11, wherein the extension 18 in one strong press compound circumferentially forming a pressure piece 19 Washer made of a highly wear-resistant material, which abuts the end face 17 of the stop body 11.
- the extension 18 extending in the insertion direction has one starting from its end 29 pointing in the direction of insertion Threaded bore 21 running parallel to the direction of insertion in the manner of a blind hole in which a pin 22 with a screwed to one end 23 of the external thread 24 which is the connecting means between the stop body 11 and the support ring 12 forms.
- an annular collar 25 on which the stop body 11 rests.
- the pin 22 has an axially spaced apart from the collar 25 further ring collar 26 on which a sleeve-shaped extension 27 of the support ring 12 abuts the end face, which with a smaller Diameter than that of the support ring 12 on the opposite of End face 28 of the support ring 12 pointing in the direction of insertion coaxially is arranged.
- the inner circumference and the outer circumference 36 of the extension 27 of the support ring 12 are otherwise in their Connection position with the corresponding circumferences of the extension 18 of the stop body 11, whereby with respect to the in shape and dimension of the same inner circumference of the extensions 18 and 27 of support ring 12 and stop body 11 a manufacturing technology simple colinear guidance can be carried out on the carrier part 5 is.
- the extension 27 of the support ring 12 has one the support ring 12 common to the threaded bore 21 of the stop body 11 coaxial feedthrough 30 through which the support ring 12 attached to the pin 22 until it rests on the collar 26 is.
- the end 31 of the pin 22 on the support ring side has an internal thread 32 on, whereby by screwing a suitable Screw 33 from the face pointing in the direction of insertion 34 of the support ring 12 from the support ring 12 between the collar 26 and the screw head 35 is screwed.
- the support ring 12 is thus positioned exactly relative to the stop body 11 and also has a defined position on pin 22.
- these two sealing arrangement elements connected by a plurality of pins 22 distributed over their circumference.
- stop body 11 Support ring 12 corresponding screw.
- the lanyard should in any case of the stop body 11 and the Support ring 12 be releasable, because an interchangeability of worn Parts of the seal assembly 7 can be guaranteed got to.
- the carrier part 5 has an annular collar 37 which arranged between the stop body 11 and the support ring 12 and with its edge 38 to near the inner wall 39 of the hollow profile 3 extends.
- This extension close to the hollow profile of the collar 37 or the design of its diameter in such a way that there is a clearance fit with respect to the hollow profile 3 of the collar 37 results, is used for radial support of the Hollow section 3 during a pushing of the hollow section 3 during of the forming process.
- the collar 37 has a collar on both sides in the axial direction 41 on the extension 27 and the extension 13 each engages behind and on the contact surface for the O-ring 13 forming Outer circumference 36 of the extension 27 on the one hand and on the outer circumference of the extension 18 on the other hand.
- the collar 41 closes at its edge 42 facing the edge flush with the Edge 38 of the ring collar 37, with the support ring 12 facing Collar in this embodiment with its in the direction of insertion facing end face 43 in a relaxed position the sealing arrangement 7 rests on the O-ring 13. However, this can also axially spaced from the O-ring 13 in the relaxed position his.
- the end face 20 of the hollow profile 3 is used to seal the Hollow profile 3, the carrier part 5 by means of the axial punch pushed in the direction of insertion.
- the C-ring 13 is from Collar 41 of the collar 37 axially squeezed, whereby the O-ring 13 spreads apart radially and on the inner wall 39 of the hollow profile is pressed with high force.
- the Ring collar 37 thus forms the actuating means due to its collar 41 for the sealing ring 13.
- the free displacement mentioned must be so large that the O-ring 13 or in general the sealing element in sufficient for a secure seal Dimensions is compressed, but it may only be so large that the O-ring 13 due to excessive crushing none Takes damage.
- the extensions 18 and 27 and the support ring 12 and the stop body 11 can their inner walls with a wear-resistant sliding film, for example be coated from molybdenum sulfide, what the service life the sealing head 4 increases and the smoothness of the Sealing arrangement 7 significantly increased relative to the carrier part 5.
- the carrier part tapers approximately at the level of the position of the O-ring 13 5 revolving in a stage 46 at which the on the support member 5 inserted O-ring 14 is present. On the opposite Side of the support ring 12 with its end face 28 on the O-ring 14 on.
- the diameter of the support ring 12 is otherwise dimensioned such that that the sealing head 4 with play in the hollow profile 3rd is insertable, however, the clearance 49 between the support ring 12 and hollow section 3 designed so tight that for a sealing Squeezing the O-ring 13 through the collar 41 of the collar 37 there is sufficient resistance and the O-ring 13 with the squeezing impingement not over the edge of the Support ring 12 is pressed, which is a shearing and thus resulting in damage to the O-ring 13.
- the O-ring 13 an elongated one is also conceivable use elastic hollow drilled plugs, which the sealing contact surface on the hollow section 3 is considerably enlarged and thus the security of an adequate seal even after guarantees a long service life.
- the contact surface of the extension 27 of the support ring 12 for the O-ring 13 may differ from the cylindrical design of the embodiment shown also be conical. This is done by applying of the O-ring 13 through the collar 41 of the collar 37 the O-ring 13 alone due to the slipping up expanded in the direction of insertion and spread to the Hollow profile wall 39 pressed, whereby the O-ring 13 only with reduced squeezing force must be applied to the required To achieve sealing. The wear of the O-ring 13 reduced.
- the sealing head 4 together with the axial punch can be done in a simpler manner Track the shortening hollow profile 3 to the same extent are accepted without loss of tightness must become. It is also possible to use the axial ram if necessary to apply an additional axial force to the hollow profile 3, so that the material flow to the forming point during forming is forced with high degrees of deformation, i.e. it will Pushed the hollow profile material to the forming point. To do this unhindered to execute, the stop body 11 and the pressure piece 19 designed in a ring shape, creating an even pressure load when the sealing arrangement 7 is in contact with the stop body 11 given on the end face 20 of the hollow profile 3 is.
- the interaction of carrier part 5 and support ring 12 for spreading the O-ring 13 thereby caused that the carrier part 5 has an external toothing carries that with an internal toothing of the support ring 12 such combs that a simple translatory insertion movement of the Support part 5 after the abutment body 11 abuts the hollow profile 3 spreads the support ring 12 forcibly guided.
- the Support ring 12 is composed of different circular segments, on the outer periphery of the O-ring 13 is held. This form of spreading can also be done by a rotatory Movement of the carrier part 5 take place.
- the carrier part 5 can also be designed as a conical mandrel, the support ring 12 as a solid within certain limits elastic, but with a much greater Shore hardness than the O-ring 13 be formed or in the form of inelastic Circular segments can exist.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
- Sealing Devices (AREA)
- Clamps And Clips (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
Claims (13)
- Vorrichtung zum Innenhochdruckumformen von Hohlprofilen (3) mit einem Innenhochdruck-Umformwerkzeug (1), in dessen Gravur (2) das Hohlprofil (3) einbringbar ist, und mit zumindest einem Axialstempel, der einen mit einem Abschnitt in das Hohlprofil (3) mit Spiel einführbaren Dichtungskopf (4) besitzt, welcher ein mit einem Druckfluidkanal (6) versehenes Trägerteil (5), an dem eine Dichtungsanordnung (7) gehalten ist und das mit dem Axialstempel starr verbunden ist, und eine in Gebrauchsstellung des Dichtungskopfes (4) am Ende des Hohlprofiles stirnseitig anliegende Anschlagsfläche aufweist, wobei die Dichtungsanordnung (7) zumindest ein zur umlaufend abdichtenden Anlage an der Innenseite des Hohlprofiles (3) radial aufspreizbares Dichtungselement (13) beinhaltet,
dadurch gekennzeichnet,
daß die Dichtungsanordnung (7) einen das Dichtungselement (13) tragenden, am Trägerteil (5) relativ zu diesem axial verschiebbar geführten und in das Hohlprofil (3) beim Andocken des Dichtungskopfes (4) am Hohlprofil (3) eintauchenden Stützring (12) und einen die Anschlagsfläche des Dichtungskopfes (4) am Hohlprofil (3) aufweisenden Anschlagkörper (11) umfaßt, der mit dem Stützring (12) fest verbunden ist, und daß das Trägerteil (5) ein Betätigungsmittel (37) aufweist, das bei Anlage des Anschlagkörpers (11) am Hohlprofil (3) aufgrund einer weitergehenden Axialbewegung des Trägerteils (5) relativ zum Stützring (12) hin in Zusammenwirkung mit dem Stützring (12) das Dichtungselement (13) aufspreizend beaufschlagt. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß das Betätigungsmittel ein Ringbund (37) des Trägerteils (5) ist, der eine Axialdurchführung (40) aufweist, die ein den Stützring (12) mit dem Anschlagkörper (11) verbindendes Verbindungsmittel (22) durchragt, und der sich radial zwischen das am Stützring (12) gehaltene Dichtungselement (13) und den Anschlagkörper (11) erstreckt und mit einem in seinem Randbereich gelegenen Kragen (41) die Anlagefläche (36) des Stützringes (12) für das Dichtungselement (13) übergreifend ausgebildet ist, derart, daß das Dichtungselement (13) durch den zwischen dem Dichtungselement (13) und dem Anschlagkörper (11) axialbeweglichen Kragen (41) bei Anlage des Anschlagkörpers (11) am Hohlprofil (3) auf spreizend beaufschlagbar ist. - Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß die Anlagefläche (36) des Stützringes (12) für das Dichtungselement (13) zylindrisch ausgebildet ist. - Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß die Anlagefläche (36) des Stützringes (12) für das Dichtungselement (13) derart konisch ausgebildet ist, daß sie sich zum Ringbund (37) hin verjüngt. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß das Dichtungselement ein O-Ring (13) aus einem Elastomer oder einem Federstahl ist. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß das Dichtungselement ein elastischer länglicher Stopfen ist. - Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß der Anschlagkörper (11) am Trägerteil (5) anliegt und daß der Anschlagkörper (11) sowie der Stützring (12) an ihren am Trägerteil (5) anliegenden Innenwandungen mit einem verschleißfesten Gleitfilm beschichtet sind. - Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß der Anschlagkörper (11) an seiner dem Hohlprofil (3) zugewandten Stirnseite (17) ein Druckstück (19) aufweist, das aus einem verschleißfesten Material besteht. - Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß der Stützring (12) an seiner dem Anschlagkörper (11) zugewandten Stirnseite (28) einen hülsenförmigen Fortsatz (27) aufweist, dessen Stirnseite (44) einen Gegenanschlag zur in Einführungsrichtung weisenden Stirnseite (45) des Ringbundes (37) des Trägerteils (5) bei einer Relativbewegung des Trägerteils (5) bildet. - Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß am Trägerteil (5) eine Anschlagplatte (9) befestigt ist, die auf ringbundabgewandter Seite des Anschlagkörpers (11) zu dieser beabstandet angeordnet ist und einen Gegenanschlag zum Anschlagkörper (11) bei einer Relativbewegung des Trägerteils (5) bildet. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß der Anschlagkörper (11) der Umfangskontur des Hohlprofiles (3) folgend ringförmig ausgebildet ist. - Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß das Verbindungsmittel von einem Stift (22) gebildet ist, auf dessen einem mit einem Innengewinde (32) versehenen Ende (31) der eine entsprechende axiale Durchgangsbohrung (30) aufweisende Stützring (12) aufgesteckt ist und in der Stecklage an einem zwischen den Enden (23,31) des Stiftes (22) ausgebildeten Ringbund (26) des Stiftes (22) anliegt sowie von der in Einführungsrichtung weisenden Stirnseite (34) des Stützringes (12) aus mit einer in das Innengewinde (32) des Stiftes (22) eingeschraubten Schraube (33) mit dem Stift (22) verschraubt ist, wobei das andere Ende (23) des Stiftes (22) ein Außengewinde (24) trägt, mit dem dieser in eine Gewindebohrung (21) des Anschlagkörpers (11) eingeschraubt ist. - Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß die Dichtungsanordnung (7) zusätzlich zum Dichtungselement (13) einen inneren Dichtungsring (14) beinhaltet, den das Trägerteil (5) an seiner Außenumfangsfläche (8) trägt und der am Innenumfang des Stützringes (12) anliegt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742443 | 1997-09-26 | ||
| DE19742443A DE19742443C2 (de) | 1997-09-26 | 1997-09-26 | Vorrichtung zum Innenhochdruckumformen von Hohlprofilen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0904869A1 EP0904869A1 (de) | 1999-03-31 |
| EP0904869B1 true EP0904869B1 (de) | 2000-11-29 |
Family
ID=7843656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98115208A Expired - Lifetime EP0904869B1 (de) | 1997-09-26 | 1998-08-13 | Vorrichtung zum Innenhochdruckumformen von Hohlprofilen |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6012317A (de) |
| EP (1) | EP0904869B1 (de) |
| AT (1) | ATE197776T1 (de) |
| DE (2) | DE19742443C2 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SI1426123T1 (sl) * | 2002-12-06 | 2007-06-30 | Thyssen Krupp Automotive Ag | Postopek in naprava za visokotlačno oblikovanje notranjosti profila |
| DE10305074B4 (de) * | 2003-02-07 | 2015-02-05 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Getriebewelle sowie Verfahren zur Herstellung einer Getriebewelle |
| SE528938C2 (sv) * | 2005-02-08 | 2007-03-20 | Ortic Ab | Hydroformningsenhet |
| US8910500B2 (en) | 2012-09-10 | 2014-12-16 | National Research Council Of Canada | Low friction end feeding in tube hydroforming |
| DE102016209072A1 (de) * | 2016-05-25 | 2017-11-30 | Bayerische Motoren Werke Aktiengesellschaft | Dichtstempel zum stirnseitigen Abdichten eines Hohlprofils |
| US10252389B2 (en) * | 2017-07-05 | 2019-04-09 | Kennametal Inc. | Quick-change clamping unit for toolholder and method of using same |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2837810A (en) * | 1955-06-17 | 1958-06-10 | Flexonics Corp | Method of producing fittings |
| US4393674A (en) * | 1981-06-25 | 1983-07-19 | Air-Mo Hydraulics, Inc. | Hydraulic chuck device for engagement with the inside of a tube |
| US5233854A (en) * | 1992-05-11 | 1993-08-10 | General Motors Corporation | Press apparatus for hydroforming a tube |
| US5233856A (en) * | 1992-05-29 | 1993-08-10 | General Motors Corporation | External seal unit for tube hydroforming |
| DE4309680A1 (de) * | 1993-03-25 | 1994-09-29 | Huber & Bauer Gmbh | Vorrichtung zum Innenhochdruckumformen eines rohrförmigen Rohlings |
| US5363544A (en) * | 1993-05-20 | 1994-11-15 | Benteler Industries, Inc. | Multi-stage dual wall hydroforming |
| US5644829A (en) * | 1993-08-16 | 1997-07-08 | T I Corporate Services Limited | Method for expansion forming of tubing |
| US5445002A (en) * | 1993-08-16 | 1995-08-29 | Ti Corporate Services Limited | Fill and pressurization apparatus |
-
1997
- 1997-09-26 DE DE19742443A patent/DE19742443C2/de not_active Expired - Fee Related
-
1998
- 1998-08-13 AT AT98115208T patent/ATE197776T1/de not_active IP Right Cessation
- 1998-08-13 DE DE59800360T patent/DE59800360D1/de not_active Expired - Fee Related
- 1998-08-13 EP EP98115208A patent/EP0904869B1/de not_active Expired - Lifetime
- 1998-09-28 US US09/161,471 patent/US6012317A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE19742443A1 (de) | 1999-04-22 |
| US6012317A (en) | 2000-01-11 |
| ATE197776T1 (de) | 2000-12-15 |
| DE19742443C2 (de) | 1999-07-22 |
| EP0904869A1 (de) | 1999-03-31 |
| DE59800360D1 (de) | 2001-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2924707C2 (de) | ||
| DE2404706C3 (de) | Hydropneumatischer Pralldämpfer | |
| DE2923902A1 (de) | Kupplung | |
| EP0855243A2 (de) | Haltevorrichtung insbesondere für ein Werkstück | |
| DE2548626B2 (de) | Verfahren und vorrichtung zum einsetzen einer o-ring-dichtung in die nut eines sitzringes | |
| DE3446974A1 (de) | Pneumatic-zylinderbaugruppe mit einem verriegelungsmechanismus | |
| EP1179149B1 (de) | Dichtungsvorrichtung für einen mit druckmittel beaufschlagten kolben in einem arbeitszylinder | |
| DE2553471A1 (de) | Gasfeder | |
| EP0733822A1 (de) | Mit Fluid gefüllte Zylinder-Kolbenstangen-Einheit, insbesondere Gasfeder | |
| DE2356186A1 (de) | Hydropneumatische vorrichtung zum energieverzehr | |
| DE10000541A1 (de) | Dichtanordnung zwischen zwei relativ zueinander drehenden Bauteilen | |
| EP0904869B1 (de) | Vorrichtung zum Innenhochdruckumformen von Hohlprofilen | |
| DD298020A5 (de) | Ventilvorrichtung | |
| EP0588779B1 (de) | Hydraulikzylinder | |
| DE2926498C2 (de) | Überdruckventil für einen Grubenstempel | |
| EP0343335B1 (de) | Gasfeder | |
| DE3307813C1 (de) | Werkzeug zur Pruefung von Rohren in einer Rohrpruefpresse | |
| DE2534576A1 (de) | Stossdaempfer | |
| DE3920161C2 (de) | Spreizkeilvorrichtung, insbesondere für Kraftfahrzeugbremsen | |
| DE69611890T2 (de) | Verbesserte hydraulische Kupplungsbetätigungsvorrichtung für Kraftfahrzeuge | |
| DE2310237A1 (de) | Hydropneumatischer stossfaenger, vorzugsweise fuer stosstangen von kraftfahrzeugen | |
| DE2403852B2 (de) | Hydraulischer Teleskopstempel für den Grubenausbau | |
| DE202015104906U1 (de) | Vorrichtung zur Herstellung eines doppelwandigen Rohres | |
| DE102023101539A1 (de) | Mechanische Sperrvorrichtung für einen Hydraulikzylinder | |
| DE3303877C2 (de) | Einzelstempelventil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19990123 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE FR GB IT SE |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DAIMLERCHRYSLER AG |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| AKX | Designation fees paid |
Free format text: AT DE FR GB IT SE |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| 17Q | First examination report despatched |
Effective date: 19991216 |
|
| ITF | It: translation for a ep patent filed | ||
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT DE FR GB IT SE |
|
| REF | Corresponds to: |
Ref document number: 197776 Country of ref document: AT Date of ref document: 20001215 Kind code of ref document: T |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20001130 |
|
| REF | Corresponds to: |
Ref document number: 59800360 Country of ref document: DE Date of ref document: 20010104 |
|
| ET | Fr: translation filed | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010813 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010814 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 98115208.5 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050813 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20070822 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20070823 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20070812 Year of fee payment: 10 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20080813 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20090430 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080901 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090303 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080813 |