EP0531612B1 - Méthode pour éjecter l'air emprisonné entre la billette et la filière dans une presse à extrusion - Google Patents

Méthode pour éjecter l'air emprisonné entre la billette et la filière dans une presse à extrusion Download PDF

Info

Publication number
EP0531612B1
EP0531612B1 EP92106740A EP92106740A EP0531612B1 EP 0531612 B1 EP0531612 B1 EP 0531612B1 EP 92106740 A EP92106740 A EP 92106740A EP 92106740 A EP92106740 A EP 92106740A EP 0531612 B1 EP0531612 B1 EP 0531612B1
Authority
EP
European Patent Office
Prior art keywords
carrier
plunger
billet
hydraulic cylinder
piston assemblies
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
EP92106740A
Other languages
German (de)
English (en)
Other versions
EP0531612A1 (fr
Inventor
Renato Seminari
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.)
SMS Group SpA
Original Assignee
Innse Innocenti Engineering SpA
Innse Innocenti Engineering Santeustacchio SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11360662&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0531612(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Innse Innocenti Engineering SpA, Innse Innocenti Engineering Santeustacchio SpA filed Critical Innse Innocenti Engineering SpA
Publication of EP0531612A1 publication Critical patent/EP0531612A1/fr
Application granted granted Critical
Publication of EP0531612B1 publication Critical patent/EP0531612B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C27/00—Containers for metal to be extruded
    • B21C27/04—Venting metal-container chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/21—Presses specially adapted for extruding metal
    • B21C23/211—Press driving devices

Definitions

  • This invention relates to a method for carrying out the ejection cycle of the air stored-up between die and billet in a billet extruding press of the type which comprises a billet carrier reciprocable toward and away from said die along a longitudinal extrusion axis of the press, a plunger reciprocable toward and away from said carrier along said axis, said carrier and plunger being respectively provided, the former with secondary hydraulic cylinder/piston assemblies, and the latter with a primary hydraulic cylinder/piston assembly and associated secondary hydraulic cylinder/piston assemblies, and a hydraulic oil transfer system extending between pumping means and said hydraulic cylinder/piston assemblies.
  • the overall operation cycle of extrusion presses currently includes a secondary, air ejection, cycle, which consists of sequentially stopping the press and discontinuing the extrusion process, de-pressurizing the working oil to the plunger, retracting the plunger, and retracting the carrier.
  • the underlying technical problem of this Invention is to provide an extrusion method and press having, respectively, such functional and structural features as to carry out an air ejection cycle during the extrusion of a billet, while overcoming the above-mentioned drawbacks with which the prior art is beset.
  • a method according to the invention being characterized in that it consists of temporarily resisting the thrust of the plunger against the billet during the extrusion process, as well as the thrust of the carrier against the extrusion die, without thereby inducing backward movement of the carrier and the plunger to allow said ejection of air from between the billet and the die.
  • a press which comprises a plunger 2 provided with a primary hydraulic cylinder/piston assembly 3 and two secondary hydraulic cylinder/piston assemblies 4.
  • the secondary hydraulic cylinder/piston assemblies 4 are each comprised of a double-acting piston 4a movable within a cylinder 4b where it defines a full-section chamber 4c and an annular chamber 4d.
  • full-section chamber 4c means the volume enclosed between the walls of the cylinder 4b and the piston 4a and intended to be filled completely with oil; likewise, annular section chamber 4d means the volume enclosed between the cylinder and the piston walls which is partly occupied by a piston rod, not referenced in the drawing.
  • the press 1 also comprises a carrier 5 for a billet (b) which is linked to a respective pair of secondary hydraulic cylinder/piston assemblies 6; similarly to the previous ones, each hydraulic cylinder/piston assembly 6 comprises a double-acting piston 6a movable within a cylinder 6b where it defines a full-section chamber 6c and an annular chamber 6d.
  • chambers 6c and 6d as have been made for the corresponding chambers of hydraulic cylinder/piston assemblies 4.
  • the plunger 2 is reciprocable toward and away from the carrier which is, in turn, reciprocable toward and away from an extrusion die M; the plunger and carrier are moved along the same direction, which coincides with the extrusion axis of the press.
  • the press 1 is provided with a hydraulic system 7 for circulating oil through said hydraulic cylinder/piston assemblies, which system may be basically composed as follows.
  • a first branch 8 of the hydraulic system 7 connects the primary cylinder/piston assembly 3 and the full-section chambers 4c of the secondary cylinder/piston assemblies 4 to a set of main supply, displacement pumps 9, 10.
  • a second branch 8a of the hydraulic system 7 connects a first hydropneumatic accumulator 11 to the annular chambers 4d of the secondary cylinder/piston assemblies 4 for the plunger 2; the accumulator 11 is provided with a pilot solenoid valve 12 for a cartridge valve 13.
  • a third branch 14 of the hydraulic system 7 extends from the full-section chambers 6c of the secondary hydraulic cylinder/piston assemblies 6 for the carrier 5 to said pumps 9 and 10; similarly as above, there is also a fourth branch 14a connecting a second hydropneumatic accumulator 15 to the respective annular chambers 6d of cylinder/piston assemblies 6. Lastly, the second hydropneumatic accumulator 15 is also provided with a pilot solenoid valve 16 for a corresponding cartridge valve 17.
  • a pre-fill valve 19 Located at an oil inlet 18 to the primary cylinder/piston assembly 3 for the plunger 2 is a pre-fill valve 19 having a pressure relief valve 20 associated therewith.
  • the pumps 9 and 10 have respective by-pass blocks 21 and 22 to be explained later in connection with the operation of the invention.
  • An additional pump 25 has a delivery side 25a connected to the accumulators 11, 15 and 23; a set of corresponding check valves 26, 27 and 28 make the connection of said delivery side 25a to each accumulator 11, 15 and 23 independent of the other two accumulators.
  • a pressure transducer 29 is associated with the pre-fill valve 19.
  • That condition is incurred when the billet b in the carrier 5 is compressed by the plunger 2 occupying an advanced position toward the carrier and being pressed on it; the carrier 5 is, in turn, at an advanced, juxtaposed position to the extrusion die M against which it is pushed.
  • the pressure relief valve 20 is opened to lower the pressure in the chambers 4c and the primary cylinder/piston assembly 3; in addition, the hold-up solenoid valve 24 is de-energized.
  • the pressure transducer 29 detects the pressure drop in the oil supply to the primary cylinder/piston assembly 3, and on a predetermined pressure level being attained, energizes the solenoid valves 12 and 16 to operate the corresponding cartridge valves 13 and 17.
  • the main pumps 9, 10 are by-passed by the respective blocks 21 and 22 inhibiting the delivery of oil to the two branches 8, 14 of the hydraulic system 7, while holding them in their steady-state operational condition entered during the extrusion process.
  • the hydropneumatic accumulators 11, 15 are placed, upon the valves 13, 17 being opened, in communication with the annular chambers 4d, 6d of the respective secondary cylinder/piston assemblies 4, 6 of the plunger 2 and the carrier 5.
  • oil is under a predetermined pressure and can flow to the annular chambers 4d, 6d upon the corresponding valves 13, 17 being opened.
  • the force developed by the pressure respectively applied by the oil contained in the accumulators 11 and 15 to the pistons 4a and 6a, is adequate to compensate the force originated by the pressure exerted by the oil still present in the full-section chambers 4c, 6c from the previous extrusion step initially performed by the press 1, on the corresponding pistons 4a and 6a.
  • This force compensation holds the carrier and plunger in a state of equilibrium, the carrier and plunger forward stroke toward the extrusion die and the carrier, respectively, being then brought to a stop.
  • the equilibrium of the forces acting within the secondary cylinder/piston assemblies 4 and 6 of the plunger and the carrier can be maintained without inducing backward movement in the carrier and the plunger.
  • This pressure drop takes place in a succession of decreasing values and within a time period to be set by the user.
  • the magnitudes of that time period and the pressure drop values are dependent on the emptying rates of the full-section chambers 4c and the primary cylinder-piston assembly 3, as well as on the storage pressure of the oil inside the accumulator 11; the higher the pressure within the accumulator 11, the faster will the oil flow from the accumulator 11 to the annular chambers 4d.
  • the pressure of the air trapped between the billet b and the extrusion die M is such that, as the carrier ceases to be pressed against the die and the plunger no longer pushes on the billet in the carrier, the air can rush out of the space in which it was retained.
  • the additional pump 25 will supply the hydropneumatic accumulator 23, whereto it is communicated by de-energizing the valve 24.
  • the solenoid valves 12 and 16 are de-energized, the pressure relief valve 20 is closed, the pumps 9 and 10 are again connected to the branches 8 and 14 of the hydraulic system and the hold-up solenoid valve 24 is energized to communicate, during this phase, the accumulator 23 to the full-section chambers 6c of the hydraulic cylinder/piston assemblies 6 for the carrier 5.
  • the press 1 is thus made ready to resume extrusion of the billet b as normal, with the carrier and the plunger at an unchanged position from the initial condition, that is the position taken during the extrusion step preceding the air venting cycle.
  • the additional pump 25 restores, with the aid of valves 24, 26, 27 and 28, the interiors of the accumulators 11, 15 and 23 back to their pressure settings, in readiness for a successive cycle of air ejection from the press.
  • a press according to the invention can afford a number of advantages.
  • the pressurized oil within accumulators 11, 15 and the actuating and hold-up accumulator 23 allows a pressure to attain predetermined high levels respectively in the annular chambers 4d, 6d and the full-section chambers 6c, and be at once available with no transients.
  • the use of the hydropneumatic accumulators enables optimum control of each operation step of the press, and of the plunger and carrier movements, compared to that afforded by just displacement pumps.
  • This movement control can be advantageously optimized by the adoption of a timing arrangement therefor which, as mentioned above, allows the equilibrium of the pressures acting in the annular 4d and 6d and full-section chambers 4c and 6c of the respective secondary cylinder/piston assemblies 4 and 6 for the plunger and the carrier to be kept constant over time.
  • hydropneumatic accumulators have no operational of transient states as have the pumps 9, 10 and 25, and allow the duration of an air ejection cycle to be further reduced, thereby improving the press productivity.
  • a further advantage of the invention is that, through the use or the hydropneumatic accumulators and their respective by-pass blocks, on resuming the extrusion process after completion of an air ejection cycle, the main pumps are already in an optimum steady-state operation condition without requiring any adjustment and attendant operation transient.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Powder Metallurgy (AREA)

Claims (7)

  1. Procédé pour exécuter le cycle d'éjection de l'air emmagasiné entre une matrice (M) et une billette (b) dans une presse d'extrusion de billette du type qui comporte un support (5) de billette (b) pouvant être animé d'un mouvement alternatif le rapprochant et l'éloignant de la matrice (M) suivant un axe longitudinal d'extrusion de la presse, un plongeur (2) pouvant être animé d'un mouvement alternatif le rapprochant et l'éloignant dudit support (5) le long dudit axe, ledit support (5) et ledit plongeur (2) étant pourvus, respectivement, le premier d'ensembles hydrauliques secondaires (16) à cylindre/piton, et le second d'un ensemble hydraulique primaire (3) à cylindre/piston et d'ensembles hydrauliques secondaires associés (4) à cylindre/piston, un système (7) de transfert d'huile hydraulique s'étendant entre des moyens de pompage (9, 10) et lesdits ensembles hydrauliques à cylindre/piston (6 ; 3 et 4), caractérisé en ce qu'il consiste à résister temporairement à la poussée du plongeur (2) contre la billette (b) pendant le processus d'extrusion ainsi qu'à la poussée du support (5) contre la matrice (M) d'extrusion sans induire ainsi un mouvement vers l'arrière du support et du plongeur, pour permettre ladite éjection de l'air emmagasiné entre la billette (b) et la matrice (M).
  2. Presse pour la mise en oeuvre du procédé de la revendication 1, d'un type qui comporte un support (5) destiné à supporter une billette (b), pouvant être animé d'un mouvement alternatif le rapprochant et l'éloignant d'une matrice (M) suivant un axe longitudinal d'extrusion de la presse, un plongeur (2) pouvant être animé d'un mouvement alternatif le rapprochant et l'éloignant dudit support (5) le long dudit axe, ledit support (5) et ledit plongeur (2) étant pourvus, respectivement, le premier d'ensembles hydrauliques secondaires (16) à cylindre/piston, et le second d'un ensemble hydraulique primaire (3) à cylindre/piston et d'ensembles hydrauliques secondaires associés (4) à cylindre/piston, un système (7) de transfert d'huile hydraulique s'étendant entre des moyens de pompage (9, 10) et lesdits ensembles hydrauliques à cylindre/piston (6 ; 3 et 4), caractérisée en ce qu'elle comporte des moyens pour résister temporairement à la poussée du plongeur contre la billette pendant le processus d'extrusion ainsi qu'à la poussée du support contre la matrice d'extrusion sans induire ainsi un mouvement vers l'arrière du support et du plongeur, lesquels moyens comprennent une source (11, 15) d'huile sous pression raccordée aux ensembles hydrauliques secondaires (6 et 4) à cylindre/piston pour le support (5) et le plongeur (2), laquelle source a pour effet d'appliquer une force prédéterminée à ces deux derniers au moyen desdits ensembles hydrauliques secondaires (6 et 4) à cylindre/piston, appropriée pour résister temporairement aux forces de poussée mises en jeu par l'extrsuion de la billette (b).
  3. Presse d'extrusion selon la revendication 2, caractérisée en ce que ladite source d'huile sous pression comporte des premier et second accumulateurs hydropneumatiques (11, 15) raccordés, respectivement, auxdits ensembles hydrauliques secondaires (4 et 6) à cylindre/piston pour le plongeur (2) et le support (5) par l'intermédiaire de deuxième (8a) et quatrième (14a) branches du système hydraulique (7).
  4. Presse d'extrusion selon la revendication 3, caractérisée en ce qu'elle comporte :
       une première branche (8) dudit circuit hydraulique s'étendant desdits moyens de pompage (9, 10) jusqu'à l'ensemble primaire (3) à cylindre/piston et jusqu'à des chambres respectives (4c) à pleine section des ensembles secondaires (4) à cylindre/piston pour le plongeur (2) ;
       une troisième branche (14) du système hydraulique s'étendant desdits moyens de pompage (9, 10) jusqu'à des chambres respectives (16) à pleine section desdits ensembles secondaires (6) à cylindre/piston pour le support (5) ;
       un premier dispositif à vannes (12, 13) associé audit premier accumulateur (11) ;
       un second dispositif à vannes (16, 17) associé audit second accumulateur (15) ;
       une pompe supplémentaire (25) pour alimenter en huile lesdits premier et second accumulateurs hydropneumatiques (11 et 15) ;
       un transducteur de pression pour l'huile amenée au plongeur (2), lesdits premier et second dispositifs à vannes (12, 13 et 16, 17) étant reliés fonctionnellement audit transducteur (29) de pression.
  5. Presse d'extrusion selon la revendication 4, caractérisée en ce que lesdits moyens de pompage (9, 10) comportent des blocs respectifs (21, 22) de dérivation pour l'écoulement de distribution vers lesdites première et troisième branches (8 et 14).
  6. Presse d'extrusion selon la revendication 5, caractérisée en ce qu'elle comporte un troisième accumulateur hydropneumatique (23) d'actionnement pourvu d'une électrovanne respective (24) de charge raccordée à des chambres respectives (6c) à pleine section des ensembles hydrauliques secondaires (6) à cylindre/piston pour le support (5).
  7. Presse d'extrusion selon la revendication 6, caractérisée en ce que lesdits premier et second dispositifs à vannes (12, 13 et 16, 17) comprennent, respectivement, une électrovanne pilote (12 et 16) et une vanne à cartouche (13 et 17).
EP92106740A 1991-09-13 1992-04-21 Méthode pour éjecter l'air emprisonné entre la billette et la filière dans une presse à extrusion Expired - Lifetime EP0531612B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI912427 1991-09-13
ITMI912427A IT1251314B (it) 1991-09-13 1991-09-13 Pressa per estrusione di metalli in genere ed in particolare dell'alluminio

Publications (2)

Publication Number Publication Date
EP0531612A1 EP0531612A1 (fr) 1993-03-17
EP0531612B1 true EP0531612B1 (fr) 1996-07-31

Family

ID=11360662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106740A Expired - Lifetime EP0531612B1 (fr) 1991-09-13 1992-04-21 Méthode pour éjecter l'air emprisonné entre la billette et la filière dans une presse à extrusion

Country Status (6)

Country Link
EP (1) EP0531612B1 (fr)
JP (1) JPH05212435A (fr)
AT (1) ATE140885T1 (fr)
DE (1) DE69212549T2 (fr)
ES (1) ES2090404T3 (fr)
IT (1) IT1251314B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2704783B1 (fr) * 1993-05-06 1995-07-28 Clecim Sa Procede de filage de metal et presse a filer perfectionnee.
US5445004A (en) * 1993-11-24 1995-08-29 Breda Danieli Extrusion Extrusion method with gas evacuation, and extrusion press
DE10006704B4 (de) * 2000-02-15 2005-02-24 Sms Eumuco Gmbh Antriebsanordnung einer Metallstrangpresse
JP2010144840A (ja) * 2008-12-19 2010-07-01 Ube Machinery Corporation Ltd 押出プレス
JP5387716B2 (ja) * 2012-04-13 2014-01-15 宇部興産機械株式会社 押出プレス装置
DE102012009182A1 (de) 2012-05-10 2013-11-14 Sms Meer Gmbh Hydraulische Strangpresse sowie Verfahren zum Betrieb einer hydraulischen Strangpresse

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675125A (en) * 1948-01-14 1954-04-13 Genders Reginald Direct and indirect extrusion of metals
DE1039981B (de) * 1951-11-29 1958-10-02 Reginald Victor Rowles Hydraulische Presse, insbesondere Strangpresse, fuer die Metallverarbeitung
GB1566617A (en) * 1977-04-04 1980-05-08 Davy Loewy Ltd Extrusion press

Also Published As

Publication number Publication date
ITMI912427A0 (it) 1991-09-13
ITMI912427A1 (it) 1993-03-14
ES2090404T3 (es) 1996-10-16
DE69212549D1 (de) 1996-09-05
IT1251314B (it) 1995-05-08
DE69212549T2 (de) 1997-02-27
JPH05212435A (ja) 1993-08-24
ATE140885T1 (de) 1996-08-15
EP0531612A1 (fr) 1993-03-17

Similar Documents

Publication Publication Date Title
US3290919A (en) High pressure hydraulic forming press
US4235088A (en) Servohydraulic press with a closed loop control circuit and method of operating a fluid pressure operated press
US5460084A (en) Method for controlling the drive of a hydraulic press
AU644691B2 (en) Method and apparatus for starting a displacer engine hydraulically
US8375765B2 (en) Method and device for controlling the synchronization of cylinder/piston units and for reducing pressure peaks during forming and/or fineblanking on a fineblanking or stamping press
US20030021700A1 (en) Fluid intensifier pump system
US20030167936A1 (en) Controller for a hydraulic press and method for the operation thereof
US4208879A (en) Injection molding machines
GB2029747A (en) Apparatus for fabricating spiral wrapped cartidge cases
US6370873B1 (en) Hydraulic drive for a press
EP0531612B1 (fr) Méthode pour éjecter l'air emprisonné entre la billette et la filière dans une presse à extrusion
KR101701016B1 (ko) 유압 압출기 및 유압 압출기를 작동하기 위한 방법
US8011219B2 (en) Method of controlling mandrel in a tube-extruding press
US5551276A (en) Upsetting press main drive
US4541241A (en) Hydraulic driving arrangement for reciprocable masses or the like
CN109175183B (zh) 大型模锻液压机混合动力液压传动系统及方法
CN111706559B (zh) 一种快速冲压液压系统
US4439986A (en) Hydraulic power unit
US2299686A (en) Hydraulic press
US2751076A (en) Extrusion press installation
JP2001252714A (ja) 金属押し出しプレスの駆動装置
US1955278A (en) Hydraulic press
US2891564A (en) Self-charging accumulator
US4455828A (en) Hydraulic power unit
SU1435343A1 (ru) Гидравлическое установочное устройство прокатного стана

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI SE

17P Request for examination filed

Effective date: 19930420

17Q First examination report despatched

Effective date: 19941005

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: INNSE INNOCENTI ENGINEERING S.P.A.

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: INNSE INNOCENTI ENGINEERING S.P.A.

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

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: INNSE INNOCENTI ENGINEERING SANTEUSTACCHIO S.P.A.

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19960731

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19960731

Ref country code: AT

Effective date: 19960731

Ref country code: BE

Effective date: 19960731

Ref country code: CH

Effective date: 19960731

REF Corresponds to:

Ref document number: 140885

Country of ref document: AT

Date of ref document: 19960815

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

REF Corresponds to:

Ref document number: 69212549

Country of ref document: DE

Date of ref document: 19960905

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2090404

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19961031

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2090404

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: OILGEAR TOWLER S.R.L

Effective date: 19970429

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBO Opposition rejected

Free format text: ORIGINAL CODE: EPIDOS REJO

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 19990430

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020313

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020430

Year of fee payment: 11

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: 20030421

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030421

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: 20031231

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20080305

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080320

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20080415

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091103

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20090422

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090422

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: 20090421