WO1994002709A1 - Pilier de soutien hydraulique tubulaire - Google Patents

Pilier de soutien hydraulique tubulaire Download PDF

Info

Publication number
WO1994002709A1
WO1994002709A1 PCT/DE1993/000631 DE9300631W WO9402709A1 WO 1994002709 A1 WO1994002709 A1 WO 1994002709A1 DE 9300631 W DE9300631 W DE 9300631W WO 9402709 A1 WO9402709 A1 WO 9402709A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe support
support according
tube
tubular body
inner tube
Prior art date
Application number
PCT/DE1993/000631
Other languages
German (de)
English (en)
Inventor
Fritz HÖLKEN
Original Assignee
Langerbein-Scharf Gmbh & Co. Kg
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 Langerbein-Scharf Gmbh & Co. Kg filed Critical Langerbein-Scharf Gmbh & Co. Kg
Priority to AU44166/93A priority Critical patent/AU4416693A/en
Publication of WO1994002709A1 publication Critical patent/WO1994002709A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props

Definitions

  • the invention relates to a pipe support with a closed interior, which is clamped in particular in underground mining and tunnel construction to support the slope and the wall of which is dimensioned in accordance with the expected load capacity.
  • Such pipe supports are used in underground mining and tunnel construction for support purposes. Depending on their training and equipment, they are called stamps or supports.
  • stamps or supports Various mining elements, such as wooden stamps and wooden pillars, hydraulic single stamps as well as friction stamps, light metal stamps, runners profi 1 supports, building material telescopic supports and pipe supports t insertion lock are known in mining.
  • wood stamps have largely been replaced by stamps or pipe supports, with wooden pillars still being used above all in the dam area.
  • the main disadvantage of wood stamps is that they are generally not recoverable and that, due to their origin, they can lead to considerable environmental damage because, in particular in developing countries, subsequent reforestation of the cleared forests is not carried out.
  • the friction stamp which consists of two telescopic tubes, has a very unfavorable characteristic with a low setting load. In the meantime it has been replaced by hydraulic single stamps. It is disadvantageous that hydraulic hydraulic fluid is required for the operation of these hydraulic individual stamps, the oil o. Contains chemicals and which is mostly sprayed into the environment during robbery.
  • Channel Profile Columns are often used as medium columns in sections and also in the perineal area. However, they are problematic due to an insufficient characteristic curve, an insufficient supporting force and setting force. In addition, they are very complex to use, which the telescopic props that have been in use for some time are not. The simple handling and the high, targeted support force are impressive. The low costs should also be emphasized.
  • the necessary building material that is filled into the building material telescopic supports cannot be made available everywhere. Even if hydromechanically visible building materials are used, it is often not possible to bring these building materials to the point of use. Substitutes are known, but do they often stop filling? ⁇ -C2 ' , ⁇ n, especially because this filling must be done very carefully to provide the necessary security. Another disadvantage is that these building material telescopic supports can not be stolen.
  • the invention is therefore based on the object to provide an easy-to-use, if necessary tel eskopi erbare, at least limited and environmentally friendly to rob and especially the Gebi rgsdruckergie largely without destroying expansion element.
  • the object is achieved in that the tubular body, seen over the height, has at least one structurally provided, plastically deforming zone and has a filling valve and a venting valve and is equipped with a filling which fills the interior and is filled with volume after the clamping or clamping of the tube body, preferably water.
  • Such a hollow body can first of all be designed in the simplest design as a simple tube, which has an inverted cap or an inverted cap at the top and an inserted or attached foot in the form of a plate at the bottom. Due to its low weight, such a tubular body can simply be set up at the place of use and, for example, can be filled with water after tensioning using appropriate wedges, for which the filling valve is preferably provided at the bottom of the tubular body. The air contained in the tubular body escapes via the vent valve 1 and complete filling of the tubular body with water is ensured. The vent valve is attached to the upper end of the tube body. Due to the constant volume of the filled water, the pipe wall must dodge when the load is increased, for which purpose plastically deforming zones are specifically provided.
  • the tubular body is shortened, so that it also evades the rock pressure.
  • the load of the mountain pressure energy is largely destroyed without it being able to cause any damage.
  • Such a tubular body cannot be used again easily after the robbery by opening the filler 1 valve, but there is the possibility of cutting off the deformed part and then reinserting the tubular body in a correspondingly shorter version or a corresponding one Weld the deformed part again.
  • the simple handling and the high level of safety to be achieved are particularly advantageous. Due to the deformation in the area of the specified zone, there is a reduction, as mentioned, to up to 40% and more. This results in an advantageous resilience of such an expansion element, so that it especially suitable for use in hard coal mining and in the longwall and longwall area.
  • the invention provides that the tubular body consists of at least two telescoping tubular pieces and that the zone is formed in the pull-out area of the inner tube and / or in the area of the outer tube .
  • the deforming zone is more or less practically automatic, since when the telescopic tube is pulled out, the inner tube specifies a corresponding single wall, where the bulge can occur.
  • This has the further advantage that it makes it difficult, if not impossible, for the telescopic tubes to be pushed into one another upon further loading. The deformation must then first be traced back before the telescoping tubes which are inserted into one another can really slide into one another.
  • a particularly expedient embodiment provides that a mechanical or hydraulic bracing device is arranged or to be arranged between the inner and outer tubes. This has the advantage that the pipe support can first be placed and clamped in before the filling and possibly additional clamping of the pipe support is carried out.
  • the plastically deforming zone is to be narrowed or specifically arranged in a specific area, there is the possibility that the tubular body or the Inner tube or the outer tube has the zone defining and limiting bandages.
  • the material deformation can be influenced in a targeted manner.
  • a smooth transition can even be achieved by the bandages being designed to run to one edge or to both edges are. This means that the wall thickness of the bandages is larger in the middle than towards the edges, so that a certain deformation, albeit slightly inhibited, can already occur in the edge area.
  • the inner tube is a self-contained body that has a filling and venting valve.
  • two separate spaces are also specified when the pressure is applied to the rock, since the intermediate valve seals, so that a targeted flexibility of both areas can also be achieved.
  • a combination with conventional hydraulic stamps is also advantageously possible, namely that the tubular body is assigned to a hydraulic single stamp, preferably serving as its base part.
  • an advantageous solution is one in which the inner and outer tubes are sealed against one another, for which purpose an end facing away from the foot part the collar welded on the outer tube has a groove with an inserted sealing ring on the edge grinding with the inner tube.
  • This sealing ring which is in the form of an O-ring, deliberately grinds on the outer wall of the inner tube and provides the necessary sealing, so that the inner tube is pushed out of the outer tube and, on the other hand, an effective seal is also obtained when the mountain pressure is applied.
  • the inner and outer tubes may further be expedient to assign the inner and outer tubes a sealing tube fixed in the overlap area, which preferably has the shape of a cup seal.
  • This seal works according to the principle of the lip seal or " cup seal " and is in large contact with both the inside and the outside. If the parts are inserted later, there is no fear of damage to the seal. In any case, the function is retained .
  • the bottom of the inner tube is assigned an insertion lock which automatically locks onto the inner wall of the outer tube.
  • This insertion lock is pressed against the inner wall of the outer tube via spring elements, so that a locking effect is automatically achieved when inserted.
  • the deformation of the tube wall can also be influenced according to the invention in that the support leg of the tube body or the outer tube is designed as a bellows tube.
  • Other designs are also conceivable, but it proves to be expedient and simple for mining, where only single walls result in the corresponding deformation zones.
  • the invention provides that a covering covering this or a corresponding insert made of rubber is arranged in the area of the zone. This highly elastic material deforms when bulging in the area of the zone and seals here if, as mentioned, there should be cracks in the area of the bulge due to a corresponding overload.
  • Pipes generally have a round cross-section, the invention additionally providing that the tubular body has a round or angular or also mixed cross-section, whereby a mixed cross-section means that for example the inner tube has a round cross-section and the outer tube has a square cross-section .
  • a mixed cross-section means that for example the inner tube has a round cross-section and the outer tube has a square cross-section .
  • a container serving as a flexibility element in the interior of the tube body which contains a pasty or gel-like mass and can be emptied via a safety valve integrated in the tube wall.
  • plastically compressible containers or moldings in the interior of the tubular body these being able to float in water, for example, and being designed such that they only deform at a correspondingly high pressure, while at normal pressure they have a correspondingly large volume, the then can be reduced by the high pressure.
  • tubular bodies made of materials with predetermined high elongation, which are arranged in sections or are partially reinforced by the bandages.
  • the entire tubular body can thus be composed of different materials, ie rings composed of different materials are composed, with the corresponding rings being able to expand or bulge through the material, while the others retain their shape.
  • the other possibility is to manufacture the entire tubular body from the same material, for example from ST 37, in order then to limit the zones which do not bulge by means of applied bandages.
  • An effective connection between the outer tube and the inner tube can be established by means of a ring tensioning element or a ring wedge, in order to limit or completely prevent sliding into one another.
  • Usual technicians can be used here.
  • Different M are above disclosed ög ⁇ possibilities how the plastically deformed zone can be specified.
  • One of the simplest is the one in which the plastically deforming zone is created on the one hand by a single wall and on the other hand by a double wall. This means that the plastically deforming zone is located in the area of the single wall, while the double wall reliably prevents a corresponding bulging or, in other words, that bulges in the area of the single wall.
  • the flexibility of the tubular body can be influenced if the tubular body is provided with longitudinal beads. Similar to the case with cartridge cases, this allows flexibility to be set within very wide limits.
  • the bandages mentioned above can be simple rings that are applied to the outer tube wall. It is particularly advantageous if the bandages are arranged in a helical or multi-threaded manner spanning the tubular body, with them being in the same lay or in the cross lay. br ac htsi nd.
  • This overpressure safety device prevents it from being used up early when the punches are set.
  • This overpressure safety device can either be assigned to the filling valve or the filling adapter, the filling adapter having to be designed such that it can be depressurized at the end of the filling process in order to enable a safe removal and also to put it on again later.
  • such a pipe support can be robbed at least to a limited extent, this being achieved in that the filling valve can be unlocked mechanically or in a V-controlled manner. So that the filled water can run out after completion of the expansion function or support function, so that after a corresponding insertion process or other relief, the pipe support can be recovered and used again later.
  • a simple and expedient stroke limitation is achieved in that a chain connecting both or a spacer rod or both is arranged between the bottom of the inner tube and the bottom of the outer tube. If the chain is tensioned accordingly, the inner tube can no longer be pulled out of the outer tube. In addition, this chain is a simple safeguard because this prevents the two pipes from being pulled apart too far.
  • the invention is characterized in that a pipe support is provided which is of particular importance for underground use because it satisfies the safety requirements, is easy and quick to use and because it is nonetheless targeted with a high degree of flexibility can take over sufficient supporting forces without endangering the supporting element as such.
  • the pipe support is easy to transport, secures the face and stretch area effectively and is at least partially robbed, so that after loading End of the support function can be recovered so that the mountains are then relieved.
  • Fig. 1 shows a two-part pipe support in section
  • Fig. 2 shows another design of the pipe support
  • Fig. 3 shows a pipe support with double chamber
  • Fig. 4 a mechanical bracing device attached to the pipe support
  • Fig. 5 ei e pipe support with several plastic
  • FIG. 8 a pipe support with sealing hose and plastic molded bodies
  • FIG. 9 pipe support with internal relief container
  • FIG. 10 pipe support with insertion lock
  • FIG. 11 pipe support with pull-out stop.
  • Fig. 1 shows a special type of expansion element, namely a pipe support (1) which is provided with plastically deforming zones.
  • the tubular body (2) of the tubular support (1) consists, as shown in FIG. 1 and also in FIG. 2, of an inner tube (3) and an outer tube (4) which can be pushed into one another.
  • a filling valve (5) is assigned to the outer tube and a vent valve (6) to the inner tube.
  • the vent valve (6) is assigned to the punch head (15) or integrated into the corresponding plate and consists of a floating plate which, when the tube body is completely filled, seals against the plate of the stamp head. This ensures that no more air can remain in the interior (9) of this tubular body (2).
  • Inner tube (3) and outer tube (4) are connected via a seal (7) which grinds against the inner wall of the outer tube (4) in such a way that there is no fear of water leakage.
  • the support foot (8) is pushed onto the outer tube (4) at the bottom and then welded, so that overall a very simple construction results.
  • Plastic zones (10, 11) are provided distributed over the height of the tubular body (2), i.e. Zones that allow the tube wall to bulge as indicated here. Since the water filling (12) is a volume-constant filling, a uniform formation of the plastic zones (10, 11) is ensured.
  • the pipe support (1) is assigned a mechanical bracing device (16).
  • the tensioning device (16) shown here consists of a winder (17) which winds up the steel strip (18) and the steel strip itself. This makes it possible to first clamp the unfilled pipe support (1) between the hanging and the lying or there to be clamped in order to bring in the water filling (12).
  • the outer tube (4) is provided with a collar (20) at the end of the pull-out area (19).
  • a groove (22) with an inserted sealing ring (23) is provided on the edge (21) of this collar ring (20) facing the inner tube (3), so that an effective seal is achieved here.
  • the inner tube (3) has an insertion lock (25) which prevents it from extending too far and damaging the relief hose (26). Via the relief hose (26) it is possible to accelerate the insertion process of the inner tube (3).
  • FIG. 4 such a pipe support (1) has a mechanical tensioning device (16 ') corresponding to a jack.
  • This mechanical bracing device (16 ') can also be combined with a hydraulic one or with a corresponding drive motor, depending on what is expedient or what is available.
  • FIGS. 5 and 6 show a comparison of such a pipe support (1) in the original state and according to FIG. 6 after relieving the rock pressure, which is indicated by the arrow.
  • a plurality of bandages (28, 29, 30) are applied to the outer tube (4), so that there are several plastic zones (11, 11 ', ll' 1 , 11 "', 11"''). It is also indicated in FIGS. 5 and 6 that the pipe support (1) is shortened by the load on the mountain pressure, here only the horizontal (31), but not the hanging, is reproduced.
  • Fig. 7 shows a special design insofar as here a pipe support (1) or a pipe body (2) is combined with a hydraulic single punch (32).
  • the hydraulic single stamp (32) is supported by the cap (33) on the mountains (not shown here) or on the slope, for which purpose it is equipped with a stamp head (34) adapted to the cap (33).
  • the stamping foot (35) rests on the tubular body (2), which is equipped as usual with a filling valve (5) and a vent valve (6).
  • FIG. 3 shows the overlap area (37) between the inner tube (3) and the outer tube (4), a sealing tube (38) being attached to a corresponding insert of the outer tube, said tube fitting tightly against the outer wall of the inner tube (3) .
  • a sealing tube (38) is attached to a corresponding insert of the outer tube, said tube fitting tightly against the outer wall of the inner tube (3) .
  • a correspondingly coated piece of pipe (39) must be provided here without the mode of operation thereby changing.
  • a plurality of shaped bodies (40) which float in the water are provided within the interior (9). When excess pressure occurs, these shaped bodies (40) deform plastically, so that there is a reduction in volume and thus a certain flexibility.
  • FIG. 10 shows an insertion lock (47) which is assigned to the bottom (45) of the inner tube (3) and thus moves with the inner tube (3).
  • This slide-in lock (47) has swivel wedges (48) which are pulled up by the springs (44), so that if the inner tube (3) in the outer tube (4) is inadvertently lowered, an early pushing into one another cannot occur.
  • the swiveling wedges (48) sit against the inner wall (46) and then prevent the inner tube (3) from being pushed in further.
  • the two figures also show a stroke limitation, the latter being effected via the chain (53) and / or a spacer rod (54) fixed to the floor (52) and floor (45).
  • the chain (53) is fixed to the floor (52) via the holder ring (55).
  • a particularly important feature of the pipe support (1) described here is that the resilience is not achieved by pressure relief valves which are intended to prevent deformation over the elastic range, but that the resilience is specifically achieved by deformation.
  • This is achieved by the plastic, targeted deformation in the area of the inner tube (3) or the outer tube (4) or in both areas. Bandages (28, 29, 30) can be used to define the deformation areas more precisely. If the inner tube (3) inside the outer tube (3) has been used up, the inner tube must be reduced to the original cross-section when it is pushed in due to the rock pressure. This also specifies a targeted flexibility. Special effects can still be achieved by using these tubular bodies (2) Completely or partially square and / or hexagonal in the inner tube and outer tube area. When loaded, the tubular bodies (2) have the tendency to first assume their cylindrical shape, in order to then continue to decay and be used up in the plastic region.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Pipe Accessories (AREA)
  • Supports For Pipes And Cables (AREA)

Abstract

Pour une utilisation dans l'exploitation minière et le tunnelage, il est prévu un pilier de soutien tubulaire (1) dont l'élément tubulaire (2), vu dans le sens de la hauteur, présente au moins une zone (10) plastiquement déformable et qui est rempli avec de l'eau après sa mise en place ou lors de celle-ci. A cet effet, l'élément tubulaire (2) est équipé d'une vanne de remplissage (5) et également d'une vanne de dégagement d'air (6) disposée au niveau de la plaque d'obturation du tube intérieur (3), de manière à assurer un remplissage complet de l'espace intérieur (9) avec de l'eau. La pression permanente de la roche est ainsi annulée en majeure partie par le fait que le pilier de soutien tubulaire (1) peut se déformer plastiquement et se raccourcir dans une zone prédéterminée. En raison d'un allongement du matériau d'environ 20 %, il se produit un raccourcissement d'environ 40 % de la longueur du pilier, de sorte que ce pilier de soutien tubulaire (1) possède une élasticité élevée.
PCT/DE1993/000631 1992-07-28 1993-07-17 Pilier de soutien hydraulique tubulaire WO1994002709A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU44166/93A AU4416693A (en) 1992-07-28 1993-07-17 Tubular hydraulic prop

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4224852.3 1992-07-28
DE4224852A DE4224852C2 (de) 1992-07-28 1992-07-28 Rohrstütze, insbesondere für den untertägigen Berg- und Tunnelbau

Publications (1)

Publication Number Publication Date
WO1994002709A1 true WO1994002709A1 (fr) 1994-02-03

Family

ID=6464260

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1993/000631 WO1994002709A1 (fr) 1992-07-28 1993-07-17 Pilier de soutien hydraulique tubulaire

Country Status (7)

Country Link
CN (1) CN1085289A (fr)
AU (1) AU4416693A (fr)
DE (1) DE4224852C2 (fr)
HU (1) HUT67954A (fr)
PL (1) PL307065A1 (fr)
WO (1) WO1994002709A1 (fr)
ZA (1) ZA935391B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130121774A1 (en) * 2011-11-16 2013-05-16 DU Technologies, Inc. Crib Bag

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19514137C2 (de) * 1995-04-20 1997-02-13 Theodor Kolk Ausbaustütze für den untertägigen Berg- oder Tunnelbau
CN105401964B (zh) * 2015-11-25 2017-09-22 安徽理工大学 一种能够指示顶板压力的矿用支架

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1080499B (de) * 1959-03-23 1960-04-28 Hermann Schwarz Kommanditgesel Nachgiebiges hydraulisches Stuetzelement fuer den Bergbau unter Tage
DE1162791B (de) * 1961-12-27 1964-02-13 Bergin G M B H Elastische Schutzhuelle fuer den Aussenstempel von hydraulischen Tragsaeulen
FR2284024A1 (fr) * 1974-09-05 1976-04-02 Mine Support Syst Pty Ltd Etai compressible pour mine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2100318A (en) * 1981-05-13 1982-12-22 Ogc Research & Dev Ltd Improvements in and relating to support members

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1080499B (de) * 1959-03-23 1960-04-28 Hermann Schwarz Kommanditgesel Nachgiebiges hydraulisches Stuetzelement fuer den Bergbau unter Tage
DE1162791B (de) * 1961-12-27 1964-02-13 Bergin G M B H Elastische Schutzhuelle fuer den Aussenstempel von hydraulischen Tragsaeulen
FR2284024A1 (fr) * 1974-09-05 1976-04-02 Mine Support Syst Pty Ltd Etai compressible pour mine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130121774A1 (en) * 2011-11-16 2013-05-16 DU Technologies, Inc. Crib Bag

Also Published As

Publication number Publication date
ZA935391B (en) 1994-03-17
DE4224852C2 (de) 1997-06-12
DE4224852A1 (de) 1994-02-03
HUT67954A (en) 1995-05-29
PL307065A1 (en) 1995-05-02
AU4416693A (en) 1994-02-14
HU9500246D0 (en) 1995-03-28
CN1085289A (zh) 1994-04-13

Similar Documents

Publication Publication Date Title
EP0824633B1 (fr) Etancons destines a l'exploitation miniere souterraine et a la construction de tunnels
EP2147191B1 (fr) Vérin hydraulique présentant des fils de securité à section rectangulaire
DE2941663A1 (de) Verfahren und vorrichtung zum abstuetzen eines deckgebirges
DE4127249C1 (fr)
WO1994002709A1 (fr) Pilier de soutien hydraulique tubulaire
DE4401480C2 (de) Ausbaustempel mit integrierter Ventilhülse für ein Druckbegrenzungsventil
DE3410211A1 (de) Vorrichtung zum dichten einer betonpumpe
DE3301262A1 (de) Mechanisiertes ausbauelement fuer den grubenbetrieb
EP0472545B1 (fr) Etai telescopique souple pour materiaux de construction
DE4402358A1 (de) Stapeltopfpfeiler
DE9218821U1 (de) Wasserhydraulische Rohrstütze
WO1995002748A1 (fr) Etançons de soutenement a soupape integree de limitation de pression et tuyaux cloues
EP1186745A2 (fr) Etançon télescopique pour le soutènement de mines et de tunnels
DE2950041C2 (de) Vorrichtung zum Füllen von Gewebestützschläuchen mit einer hydraulisch aushärtbaren Masse
DE3916475C2 (fr)
DE2600461A1 (de) Hydraulischer grubenstempel
DE4035874A1 (de) Ausbaustempel mit in dem stempelkopf integriertem druckbegrenzungsventil
DE3621354A1 (de) Bohrlochverschluss mit ringspreizelement
DE102007030697B4 (de) Verfahren und Anordnung zur Abdichtung einer Öffnung in Form eines Loches in einer Spundwand
DE818184C (de) Sicherungskoerper fuer verstellbare eiserne Grubenstempel
DE10229303A1 (de) Hydraulikstempel mit vereinzelt im Stempelkopf untergebrachten Ventilen
DE19527477C1 (de) Ventil für einen durch Befüllen mit einem Baustoff teleskopierbaren stählernen Hohlkörper
DE177032C (fr)
DE7936878U1 (de) Fuelleinrichtung fuer gewebeschlaeuche zum anschliessen von insbesondere bogenfoermigem streckenausbau des berg- und tunnelbaus an den gebirgsstoss
DE4343313A1 (de) Aktive Stützschwelle für den Grubenausbau in Streb und Strecke

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BY CA CZ HU KP KR KZ PL RU UA US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1993914633

Country of ref document: EP

ENP Entry into the national phase

Ref country code: US

Ref document number: 1995 374735

Date of ref document: 19950127

Kind code of ref document: A

Format of ref document f/p: F

WWE Wipo information: entry into national phase

Ref document number: PV1995-212

Country of ref document: CZ

WWW Wipo information: withdrawn in national office

Ref document number: 1993914633

Country of ref document: EP

122 Ep: pct application non-entry in european phase
WWR Wipo information: refused in national office

Ref document number: PV1995-212

Country of ref document: CZ

NENP Non-entry into the national phase

Ref country code: CA