EP0389375A1 - Erdverankerungs-Rammsystem - Google Patents

Erdverankerungs-Rammsystem Download PDF

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Publication number
EP0389375A1
EP0389375A1 EP90400793A EP90400793A EP0389375A1 EP 0389375 A1 EP0389375 A1 EP 0389375A1 EP 90400793 A EP90400793 A EP 90400793A EP 90400793 A EP90400793 A EP 90400793A EP 0389375 A1 EP0389375 A1 EP 0389375A1
Authority
EP
European Patent Office
Prior art keywords
anchor
ramp
ground
protector
combustion
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
Application number
EP90400793A
Other languages
English (en)
French (fr)
Other versions
EP0389375B1 (de
Inventor
Bernard Castagner
Claude Waitzenegger
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of EP0389375A1 publication Critical patent/EP0389375A1/de
Application granted granted Critical
Publication of EP0389375B1 publication Critical patent/EP0389375B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/02—Placing by driving
    • E02D7/06—Power-driven drivers
    • E02D7/12—Drivers with explosion chambers
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S173/00—Tool driving or impacting
    • Y10S173/02—Sound muffling

Definitions

  • the present invention relates to a system for driving anchors into a ground.
  • a system for driving anchors into a ground At the end of the 20th century, there is a great evolution in the conditions of execution of public works sites implementing anchoring operations and post installation.
  • the proposed system and its variants meet these constraints. It allows high-speed anchoring in very soil types varied, in extreme climatic conditions and in difficult geographical situations. It only requires light equipment and very limited logistics.
  • the present invention proposes in particular a system for driving anchors by pyrotechnics.
  • the concept of pyro anchoring consists in driving a particularly metallic anchoring into the ground on which a superstructure is "fixed” using the energy delivered by a pyrotechnic composition, for example of the safety propellant type with high gassing. The pressure generated transmits most of this energy to the anchoring element.
  • the present invention therefore relates to an anchoring driving system in a soil by gas expansion comprising, on a support intended to be kept fixed relative to said soil, a system for igniting and combustion of a composition pyrotechnic as well as launch anchor, and also comprising an acoustic expansion gas protector, characterized in that the acoustic expansion gas protector is slidably mounted on a recoil ramp thus achieving a balancing of the quantity of transmitted movements at anchor.
  • the support is a carrier vehicle associated with means for moving the reversing ramp and the acoustic protector mounted on said ramp, from a transport position on said vehicle to a working position.
  • Deployment means can include ter a telescopic arm mounted on the vehicle and relative to which the recoil ramp can tilt from a transport position to a working position under the action of a jack associated with said arm.
  • the hearing protector is preferably a tube open at one of its ends intended to be facing the ground in the working position and which is provided inside towards its other end, with the aforesaid firing, combustion and launching system.
  • Said tube can be extended beyond its end intended to be facing the ground in the working position, by a flexible skirt.
  • Said tube can also comprise two half-shells articulated with respect to a main part so as to allow the opening of the tube for loading of said system.
  • the firing, combustion and launching system comprises a piston intended to remain integral with the anchorage during insertion, an anchoring head defining with said piston a combustion chamber, a generator housing gas disposed in said combustion chamber and containing said pyrotechnic composition, an anchoring locker secured to the acoustic protector.
  • the anchor locker can comprise two movable jaws intended to ensure the blocking of the anchor head.
  • the gas generator housing can be made of a thermoplastic or composite material and its structure can be weakened to open at low pressure outside its housing for use.
  • the pyrotechnic composition can be a propellant usable between - 40 ° C and + 70 ° C.
  • the anchors may in particular comprise a penetration limiter and fins for penetration into the ground.
  • the pyro anchor system preferably consists of a pyro anchor vehicle, a supply truck transporting the anchors, this truck being fitted or not with a handling arm, anchors and gas generators, possibly a manipulator commuting between the pyro anchor vehicle and the supply truck.
  • the pyro anchor vehicle consists of ( Figure 1) a reversing ramp 1 and its hydraulic positioning system 2, a hydraulic anchor locker 3 and the firing system 4, an acoustic protector for gas expansion 5, l 'assembly being mounted on a carrier vehicle 43 adapted to the type of site.
  • the recoil ramp can be replaced by a gutter or a recoil tube; the reversing tube then acts as an acoustic protector for expansion of the gases.
  • the carrier vehicle 43 ( Figure 6) can be an all terrain vehicle equipped with a telescopic arm 32 movable in the vertical plane. This allows anchors to be driven into locations below or elevated from at the position of the carrier vehicle.
  • the invention will preferably be placed vertically, for example at the front or at the rear of the carrier vehicle. In the case of sinking larger anchors, a longer recoil ramp will generally be required. To meet the road gauge, during transport, this ramp will preferably be placed horizontally. The deployment in a vertical position will be done using mobile arms animated by preferably hydraulic cylinders.
  • Figures 1 and 2 show preferred means and mode of deployment of the recoil ramp on the pyro anchor vehicle 43 in principle.
  • the recoil ramp 1 and its anchor system are placed on a cradle 7 and linked to it by an axis of rotation 8.
  • the cradle 7 and recoil ramp 1 assembly is moved horizontally along two rails 6 fixed to the carrier vehicle. using the ramp positioning cylinder 27 such that the axis of rotation 8 is correctly positioned relative to the desired point of insertion of the anchor.
  • the reversing ramp 1 is straightened by deployment of the straightening cylinder 28 which is fixed on the cradle 7.
  • the two pads 29 allow the grounding of the reversing ramp. They are deployed by two jacks 30.
  • each pad 29 with its jack arm 30 is according to the invention of the type of ball joint with limited movement to allow good adaptation to irregularities in the ground without hindering the passage of the anchoring when pushed in.
  • the setting of the directivity of the depression, therefore of the reversing ramp, is ensured on the one hand by the hydraulic pads fitted to the carrier vehicle then the pads 29 of the reversing ramp and their jacks 30; on site it is ensured by the righting cylinder 28.
  • FIGS. 7, 8 show a means and preferred modes of deployment of the recoil ramp.
  • the reversing ramp 33 and its anchoring system are linked to the telescopic arm 32 by a "telescope head" 34 fitted with a jack 35 which makes it possible to tilt the reversing ramp 33 from the horizontal road transport position to the position vertical employment.
  • a jack 36 located between the chassis of the carrier vehicle and the telescopic arm 32 makes it possible to move the latter in a vertical plane.
  • the two pads 37 and their deployment cylinders 38 make it possible to improve the stability on the ground of the carrier vehicle and to compensate for its slope due to uneven terrain.
  • a launching tube of the anchor in two parts: anchor head 12 and a locker anchoring 3.
  • the anchoring head 12 provides the anchoring guide and the resistance to pressure.
  • the anchor locker 3 ensures rapid and precise gripping of the equipped anchor 9, its blocking, the precision of the launch axis and the adjustment of the height of the ground clearance before firing of the equipped anchor.
  • the anchor locker 3 in which the equipped anchor is housed consists of two jaws 9.
  • the anchor locker 3 is moved along the recoil ramp 1 by a hydraulic cylinder 21.
  • the anchor 10 is equipped with a reusable piston 11 and a reusable anchor head 12.
  • the combustion chamber 13 thus formed contains the gas generator 14 which, for security reasons, is preferably placed in this chamber at the time of loading the anchor equipped in the pyro-anchor.
  • the chamber 13 is closed by a quick-lock latch 15.
  • the tightness of the chamber 13 and the precision of the initial guidance of the anchor 9 equipped with its piston 11 are ensured by the precision of the machining of the anchor head 12 and of the piston 11 which are reusable.
  • the outside "diameter" of the consumable anchor is raw.
  • the guide length of the piston 11 ensures that the fitted anchor is not jammed during movement, which a simple bearing plate with or without a joint would not provide.
  • the piston 11 is inside the anchor head to facilitate automatic and precise gripping of the latter in the anchor locker.
  • the anchor, piston and anchor head assembly is assembled by simple pinning.
  • the gas generator 14 comprises a sealed housing 16 preferably made of composite or thermoplastic materials with or without shutter vents.
  • the structure of the gas generator can also be metallic, cardboard, composite material or manufactured using a combination of these materials.
  • the plastic materials were chosen so that in the event of a fire, the structural material is weakened at a temperature below the auto-ignition temperature of the pyrotechnic products.
  • the structure remains intact during operation of the gas generator, but it can also either burn or burst during operation.
  • the preferred solution limits combustion and operating residues and allows the use of powders with high combustion pressure without generating these high pressures in the thrust chamber. These high pressures create too strong accelerations on the anchors and dimensional constraints on the walls of the thrust chamber.
  • the neck of the combustion chamber is preferably linked to the structure of the gas generator, but it can also be linked to the structure of the housing of the gas generator in the form of an interchangeable element after a large series of launches.
  • the neck of the chamber is made up of one or more openings. These are cylindrical or convergent in order to limit the speed of gases detrimental to the performance of the gas generating system; but without departing from the scope of the invention, it is possible to use an orifice comprising in its thickness a divergent part. In particular, to allow the conditioning of all forms of propellant elements before and during combustion, a generator with multiple small orifices will be used.
  • the obturation of these multiple orifices is preferably carried out by an under-thickness of the material in line with these orifices.
  • This box contains the propellant 17 "all weather" for reasons of safety and regularity of performances between - 40 ° C and + 70 ° C.
  • other types of pyrotechnic compositions can be used.
  • the ignition is provided by a pyrotechnic component 18 initiated by laser radiation or by a pyrotechnic component initiated by percussion. Electric igniters that are insensitive to electric or electromagnetic radiation and to electrostatic charges may also be used.
  • the use of a pyrotechnic component initiated by laser type radiation makes it possible to overcome the problems of tightness and positioning accuracy between the gargousse and the initiation system. In addition, it increases safety against shocks and various environments.
  • the initiation system includes an initiation chain interrupt, also known as an initiation safety device. This system will integrate, in operating prohibition, the various safety data such as the verticality provided by verticality sensors, the closing of the anchor locker and the closing of the hearing protector.
  • FIG. 4 it has been chosen to limit the acoustic and gaseous effects of the expansion of the gases from the gas generator by using an acoustic protector 5 in which the gases are over-expanded.
  • an acoustic protector with opening, for example in half-shells 22 whose masses are balanced on each side of the anchor system. These two half-shells 22 are closed using jacks 23 after the loading of the fitted anchor 9 in the anchor locker 3. It is also possible to use an acoustic protector made of flexible materials which is raised during loading; an acoustic protector nesting in rigid elements which during loading, a rigid acoustic protector in a single element which is released by elevation along the recoil ramp and this independently of the anchor locker.
  • the hearing protector is equipped at its base with a flexible skirt 24 which ensures a certain seal at ground level despite the irregularities in the ground.
  • the control of the descent of the recoil mass is ensured by the jack of the ramp 21 which releases the pawl 26 from the rack 25.
  • Operational positioning vehicle routing on the anchorages (the pyro anchor vehicle is capable of anchoring approximately 4 to 5 meters from the vehicle depending on its equipment); tilting of the recoil ramp and the anchor system, from the horizontal transport position to the vertical working position; simultaneous opening of the two jaws of the anchor locker and the half-shells of the hearing protector.
  • Loading operations choice of anchorage corresponding to the terrain; installation of the gas generator and closing of the safety lock on the anchor head; loading the anchor; closing the anchor locker; closing of the acoustic and environmental protector.
  • Positioning operations the reversing ramp and the anchor system are stationed; system verticality adjustment; lowering of the anchor system until the hearing protector contacts the ground. Launch of the fitted anchor.
  • Firing lifting of the firing safety; arming the firing system; release of ignition energy (radiation or percussion); initiation of the safety igniter; combustion of the propellant causing a pressure rise in the generator, then total or partial rupture of the generator structure and expansion of the gases in the anchor head; the energy released is transmitted a) to the anchor via the piston, b) to the anchor head and to the system which rises along the recoil ramp.
  • Anchor movement the anchor moves at high speed; at the end of its travel in the anchor head, the anchor has reached its maximum speed and enters the ground; its kinetic energy is absorbed by the perforation of the ground; the penetration height is obtained by using the generator of different loadings which are a function of the nature of the soil and the type of anchoring; if you wish to have a precise penetration height or limit the number of types of gas generator, use will be penetration limiters (stop plates or segments) which are placed on the outside of the tubes.
  • Movement of the recoil mass the kinetic energy of the anchor system (anchor head and acoustic protector) was absorbed by its rise along the recoil ramp; at the end of the race, the anchor system is locked in "high position" by the rack and pin locking system; in the high position, the acoustic protector has released the non-buried part of the anchor and the piston which is reused; the pyro anchor vehicle moves and the anchor head is recovered; we are then ready for a new loading-anchoring cycle.
  • the anchors must be made in soils of very varied types such as sand, swamp, clay, limestone ... These anchors, preferably metallic, will be of various shapes and sizes depending on the nature of the soil and the forces applied to the anchorage pressed, see Figures 9 to 14.
  • These anchors 9 may include lateral fins 41 which improve the resistance in the ground in particular to tilting forces.
  • penetration limiters 42 may also be fitted with penetration limiters 42 in the form of circular or polygonal plates or of welded or folded inserts.
  • section profiles of the various anchors will be adapted to the nature of the terrain; they can be cylindrical, polygonal, "T”, cross, "H”, ...
  • Elements for quick fixing of structures on these anchors may be integrated or fitted; For example interlocking tube or cone, fixing lug, pre-welded bolts.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Air Bags (AREA)
  • Piles And Underground Anchors (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
EP90400793A 1989-03-23 1990-03-22 Erdverankerungs-Rammsystem Expired - Lifetime EP0389375B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8903813A FR2644811B1 (fr) 1989-03-23 1989-03-23 Systeme pyrotechnique destine a enfoncer des ancrages dans le sol
FR8903813 1989-03-23

Publications (2)

Publication Number Publication Date
EP0389375A1 true EP0389375A1 (de) 1990-09-26
EP0389375B1 EP0389375B1 (de) 1993-02-24

Family

ID=9379986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90400793A Expired - Lifetime EP0389375B1 (de) 1989-03-23 1990-03-22 Erdverankerungs-Rammsystem

Country Status (24)

Country Link
US (1) US5104264A (de)
EP (1) EP0389375B1 (de)
JP (1) JP2846400B2 (de)
KR (1) KR900014694A (de)
CN (1) CN1021068C (de)
AR (1) AR243005A1 (de)
AT (1) ATE85996T1 (de)
AU (1) AU630172B2 (de)
BR (1) BR9001346A (de)
CA (1) CA2012769A1 (de)
DE (1) DE69000942T2 (de)
DK (1) DK0389375T3 (de)
ES (1) ES2040574T3 (de)
FI (1) FI92235C (de)
FR (1) FR2644811B1 (de)
IL (1) IL93834A (de)
LT (1) LT3761B (de)
LV (1) LV11200B (de)
MA (1) MA21776A1 (de)
PL (1) PL165216B1 (de)
PT (1) PT93551B (de)
RU (1) RU1838505C (de)
UA (1) UA19037A (de)
ZA (1) ZA902155B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2670582A1 (fr) * 1990-12-12 1992-06-19 Castagner Bernard Penetrometre dynamique pyrotechnique.
FR2678011A1 (fr) * 1991-06-19 1992-12-24 Badaroux Christian Dispositif pyrotechnique simplifie de foncage de micro-pieux dans le sol.
FR2688527A1 (fr) * 1992-03-13 1993-09-17 New Conimast International Procede d'amarrage pyrotechnique d'un module de fondation prolonge.
FR2723115A1 (fr) * 1994-07-26 1996-02-02 Jean Pierre Boyault Projeteur pyrotechnique d'outils
US5591902A (en) * 1990-12-12 1997-01-07 Castagner; Bernard Dynamic pyrotechnical penetrometer
US5913252A (en) * 1995-07-25 1999-06-15 Bernard Castagner Pyrotechnic tool driving device

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5570975A (en) * 1994-06-27 1996-11-05 Reinert, Sr.; Gary L. Metal foundation push-it and installation apparatus and method
US5944452A (en) * 1998-03-30 1999-08-31 Reinert, Sr.; Gary L. Heavy duty foundation installation apparatus and method
FI108561B (fi) * 1998-09-29 2002-02-15 Tamrock Oy Kotelo kallionporauslaitteen äänen eristämiseksi ja sovitelma kallionporauslaitteen yhteydessä
US6591919B1 (en) * 1999-09-02 2003-07-15 Timothy P. Herrmann Automated post driver
EP1285138B1 (de) * 2000-05-31 2004-08-04 Fast Frames (UK) Limited Pfahlramme
US20030230032A1 (en) * 2002-06-13 2003-12-18 George Shahnazarian Take-up devices for use in building structure
SE528598C2 (sv) * 2004-10-07 2006-12-27 Atlas Copco Rock Drills Ab Hölje samt borrigg innefattande ett sådant hölje
JP4807661B2 (ja) * 2006-04-21 2011-11-02 株式会社プロテックエンジニアリング 地盤補強工法と地盤補強構造並びに地盤補強用アンカー打込装置
CN103981865B (zh) * 2014-05-20 2015-09-23 青岛科技大学 一种便携式自动进料手动打桩装置及打桩方法
CN105604060B (zh) * 2015-09-30 2017-05-17 赵庆锋 一种堤坝溃口射桩机及其射桩方法
CN105256801B (zh) * 2015-09-30 2017-01-18 孙继铮 一种堤坝溃口快速射桩机及射桩方法
CN105350536B (zh) * 2015-09-30 2017-03-08 杨勇 一种堤坝溃口射桩机
CN113513010B (zh) * 2021-06-23 2023-01-20 国网河北省电力有限公司邢台供电分公司 内爆式夯击机构及内爆式强夯机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR389049A (fr) * 1908-04-09 1908-08-28 Franz Schrey Sonnette à explosions pour battre les pieux
FR1001682A (fr) * 1946-06-19 1952-02-26 Sonnette
FR1522778A (fr) * 1966-08-16 1968-04-26 Demag Ag Appareil de battage sur chèvre avec cheminée d'insonorisation
EP0039654A2 (de) * 1980-05-05 1981-11-11 TRAVOCEAN Société à Responsabilité Limitée dite Sprengvorrichtung zum Verankern von Pfählen und ähnlichen Gegenständen im Boden
EP0073264A1 (de) * 1981-08-31 1983-03-09 Eugenio Ravaglia Bodenanker für Pfostenstützen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE23569E (en) * 1946-09-16 1952-10-28 Device fob inserting bolts in
SU876848A1 (ru) 1979-07-13 1981-10-30 За витель Устройство дл установки длинномерных строительных элементов в грунт
US4286496A (en) * 1979-10-12 1981-09-01 Olin Corporation Fastener guidance and retention tip member

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR389049A (fr) * 1908-04-09 1908-08-28 Franz Schrey Sonnette à explosions pour battre les pieux
FR1001682A (fr) * 1946-06-19 1952-02-26 Sonnette
FR1522778A (fr) * 1966-08-16 1968-04-26 Demag Ag Appareil de battage sur chèvre avec cheminée d'insonorisation
EP0039654A2 (de) * 1980-05-05 1981-11-11 TRAVOCEAN Société à Responsabilité Limitée dite Sprengvorrichtung zum Verankern von Pfählen und ähnlichen Gegenständen im Boden
EP0073264A1 (de) * 1981-08-31 1983-03-09 Eugenio Ravaglia Bodenanker für Pfostenstützen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2670582A1 (fr) * 1990-12-12 1992-06-19 Castagner Bernard Penetrometre dynamique pyrotechnique.
WO1992010753A1 (fr) * 1990-12-12 1992-06-25 Bernard Castagner Penetrometre dynamique pyrotechnique
US5591902A (en) * 1990-12-12 1997-01-07 Castagner; Bernard Dynamic pyrotechnical penetrometer
FR2678011A1 (fr) * 1991-06-19 1992-12-24 Badaroux Christian Dispositif pyrotechnique simplifie de foncage de micro-pieux dans le sol.
FR2688527A1 (fr) * 1992-03-13 1993-09-17 New Conimast International Procede d'amarrage pyrotechnique d'un module de fondation prolonge.
FR2723115A1 (fr) * 1994-07-26 1996-02-02 Jean Pierre Boyault Projeteur pyrotechnique d'outils
WO1996003549A1 (fr) * 1994-07-26 1996-02-08 Bernard Castagner Dispositif de projection pyrotechnique d'outils
US5913252A (en) * 1995-07-25 1999-06-15 Bernard Castagner Pyrotechnic tool driving device

Also Published As

Publication number Publication date
JP2846400B2 (ja) 1999-01-13
DE69000942D1 (de) 1993-04-01
CA2012769A1 (fr) 1990-09-23
LT3761B (en) 1996-03-25
CN1045831A (zh) 1990-10-03
FI901408A0 (fi) 1990-03-21
FR2644811A1 (fr) 1990-09-28
KR900014694A (ko) 1990-10-24
AU5210890A (en) 1990-09-27
UA19037A (uk) 1997-12-25
FI92235C (fi) 1994-10-10
RU1838505C (ru) 1993-08-30
BR9001346A (pt) 1991-04-02
US5104264A (en) 1992-04-14
LTIP1835A (en) 1995-08-25
FR2644811B1 (fr) 1991-05-24
LV11200A (lv) 1996-04-20
LV11200B (en) 1996-08-20
JPH0321720A (ja) 1991-01-30
DE69000942T2 (de) 1993-09-30
IL93834A (en) 1993-02-21
EP0389375B1 (de) 1993-02-24
PT93551B (pt) 1996-07-31
CN1021068C (zh) 1993-06-02
AR243005A1 (es) 1993-06-30
ZA902155B (en) 1990-12-28
MA21776A1 (fr) 1990-10-01
FI92235B (fi) 1994-06-30
ATE85996T1 (de) 1993-03-15
DK0389375T3 (da) 1993-06-14
IL93834A0 (en) 1990-12-23
PT93551A (pt) 1991-10-31
AU630172B2 (en) 1992-10-22
PL165216B1 (en) 1994-11-30
ES2040574T3 (es) 1993-10-16

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