EP0256955B1 - Procédé de régulation des paramètres de percussion du piston de frappe d'un appareil mû par un fluide incompressible sous pression, et appareil pour la mise en oeuvre de ce procédé - Google Patents

Procédé de régulation des paramètres de percussion du piston de frappe d'un appareil mû par un fluide incompressible sous pression, et appareil pour la mise en oeuvre de ce procédé Download PDF

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Publication number
EP0256955B1
EP0256955B1 EP87420203A EP87420203A EP0256955B1 EP 0256955 B1 EP0256955 B1 EP 0256955B1 EP 87420203 A EP87420203 A EP 87420203A EP 87420203 A EP87420203 A EP 87420203A EP 0256955 B1 EP0256955 B1 EP 0256955B1
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EP
European Patent Office
Prior art keywords
chamber
pressure
piston
valve
fluid
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
EP87420203A
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German (de)
English (en)
French (fr)
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EP0256955A1 (fr
Inventor
Jean Sylvain Comarmond
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.)
Montabert SAS
Original Assignee
Montabert SAS
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 Montabert SAS filed Critical Montabert SAS
Priority to AT87420203T priority Critical patent/ATE58082T1/de
Publication of EP0256955A1 publication Critical patent/EP0256955A1/fr
Application granted granted Critical
Publication of EP0256955B1 publication Critical patent/EP0256955B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/26—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator

Definitions

  • the subject of the present invention is a method for regulating the percussion parameters of the striking piston of an apparatus driven by an incompressible fluid under pressure, and an apparatus for implementing this method.
  • Percussion devices driven by an incompressible fluid under pressure are supplied with fluid, so that the result of the hydraulic forces applied successively on the striking piston, displaces the latter alternately in one direction then in the other.
  • This apparatus comprises a striking piston mounted to slide in a body comprising a cylinder-shaped cavity, in which is concentrically mounted a distributor ensuring a controlled supply of fluid under pressure so that the result of the forces is applied successively to the piston to move it one way and then the other.
  • devices of this type must be adjusted according to the hardness of the ground encountered by the tool.
  • the piston moves inside a bore or cylinder in which is provided, above the piston, a chamber which, delimited in part by the latter, is conventionally called: upper room.
  • a chamber which, delimited in part by the latter, is conventionally called: upper room.
  • this chamber is supplied with pressurized fluid, the hydraulic force which is created there allows the piston to describe its stroke.
  • a second chamber is formed, also partially delimited by the piston, conventionally called: lower chamber.
  • the striking piston can, in the instant following the impact against the tool, rebound more or less depending on the hardness of the ground. If the piston rebounds on the tool just after impact, the speed of the piston can be such that it generates a momentary overpressure in the upper chamber and a momentary decrease in pressure in the lower chamber.
  • the first consists in equipping the device with a regulator making it possible to adjust the supply pressure of pressurized fluid, which modifies the speed of impact.
  • Another solution consists in equipping the apparatus with a hydraulically actuated distributor, making it possible to modify the striking stroke, and consequently, the displacement and the impact speed of the piston.
  • the impact parameters such as impact speed and striking frequency, are at most manually adjustable using complex devices, but in no case do they allow automatic adaptation of the impact speed to the nature of the terrain in which the tool operates.
  • the present invention aims to remedy these drawbacks.
  • the regulation process which it relates to, intended for a percussion device driven by an incompressible fluid under pressure, comprising two upper and lower chambers formed in the cylinder in which the piston moves and equipped with devices for controlling the parameters of percussion, impact speed and striking frequency, allowing adjustment according to the hardness of the ground in which the device must work, is characterized in that it consists in measuring, at least during the possible rebound time of the impact piston on the tool, the pressure in the upper chamber, in the lower chamber or in a chamber connected to one of them, to compare this pressure to a reference pressure, then according to this comparison , to regulate the flow of fluid in a channel connected to the device for controlling the percussion parameters.
  • An apparatus for implementing this process of the type comprising a piston which can be moved alternately inside the cylinder, with which it delimits an upper chamber and a lower chamber, under the action of the resultant of hydraulic forces exerted successively in the upper and lower chambers, and equipped with hydraulically controllable devices capable of varying percussion parameters, impact speed and striking frequency, is characterized in that it comprises a channel opening directly into the upper chamber, or into the lower chamber, or in a chamber in communication with one of them at the time of impact, connected via a hydraulic element to means for controlling the device for controlling the percussion parameters.
  • the device represented in FIG. 1 is a percussion device of the type described in the request. of French patent 81.14043 (FR-A 2 509 217) or its European correspondent EP-A 0 070 246 in the name of the Applicant, and comprising a piston 1 sliding in a body 2 comprising a cylinder-shaped cavity, in which is concentrically mounted a distributor 3.
  • This device is equipped with a regulator making it possible to adjust the supply pressure of the device and, consequently, the speed of impact of the piston.
  • this regulator comprises a drawer 4 in equilibrium under the force of a spring 5 and under the pressure of the supply fluid, brought by a channel 6 and a nozzle 7, acting in the chamber 8 at the end of the drawer .
  • a chamber 9 for piloting the drawer is located so as to act in an antagonistic manner to the effect of the pressure in the chamber 8.
  • the drawer 4 delimits with the walls of the cavity in which it is mounted, a throttled passage forming a nozzle 10 ensuring the passage of the fluid discharged through the channel 11 by the piston, during the return stroke thereof.
  • the back pressure created by the nozzle 10 is such that the supply pressure acting in the chamber 8 rises to the value necessary to compensate for the action of the spring 5, and this in the absence of pressure in the chamber 9.
  • a channel 12 opens into a chamber 13 called “upper chamber”, formed inside the cylinder in which the piston 1 moves, and partly delimited by it.
  • a sequence valve 14 ensuring the comparison between the pressure of the fluid contained in the upper chamber 13 and the pressure of the supply fluid under high pressure, the pressurized feed fluid being supplied from the channel 31 to the sequence valve through a channel 17.
  • This sequence valve allows the passage of fluid in a channel 15, when the pressure in the upper chamber is greater than the supply pressure of the device.
  • This sequence valve 14 is connected via a channel 15 to a device comprising a slide 16 mounted to slide in a bore 18 delimiting on one side a chamber 19 called “buffer chamber” into which the channel 15 opens and the other side a chamber 20, connected to the low pressure circuit 22 via a channel 23.
  • the chamber 20 also contains a spring tending to move the slide in a direction of reduction of the volume of the buffer chamber 19.
  • the chambers 19 and 20 are in communication with each other by means of a nozzle 25.
  • the buffer chamber 19 is also connected to the piloting chamber 9 of the pressure regulator by a channel 24.
  • the communication between the buffer chamber 19 and the low pressure circuit 22 by the nozzle 25 and the chamber 20 allows, under these conditions, the pressure of the chamber 19 to remain low.
  • the rebound speed of the piston on the latter is high, which generates, in the upper chamber 13, a pressure higher than the supply pressure of the device, due to the sudden discharge of fluid through the channels normally used to supply the upper chamber during the stroke.
  • the overpressure in the channel 12 actuates the sequence valve 14 which injects, into the buffer chamber 19 and through a nozzle 26 mounted on the channel 15, a certain quantity of fluid increasing the pressure in the chamber 19 and in the piloting chamber 9 of the regulator.
  • the slide valve 4 of the regulator tends to further throttle the nozzle 10, which results in an increase in the operating pressure of the device and in an increase in the speed of impact of the piston.
  • the slide 16 is in equilibrium for a pressure in the buffer chamber 19 such that the flow of fluid that this pressure allows to pass through the nozzle 25 is equal to the flow injected through the nozzle 26 by the valve of sequence 14.
  • the upper chamber 13 is connected either to the supply channel 31 or to the low pressure channel 22.
  • the control chamber 29 of the distributor 28 is supplied with pressurized fluid through a channel 32 opening into an annular recess delimited by a groove 33 of a drawer 34 slidably mounted in a bore 35.
  • the groove 33 is susceptible, depending on the position of the drawer 34, to put the chamber 29 in communication via the channel 32 with one or more of a series of channels 36-39 opening into the cylinder in which the piston moves.
  • the function of the drawer 34 is to select the active control channel 36-39 which, supplied from the lower chamber 40, will pressurize the control section 29.
  • the supply of pressurized fluid to the upper chamber intervenes more or less early in the piston operating cycle, varying the stroke, the striking frequency and the impact speed of the piston.
  • the control of the position of the drawer 34 is obtained, as in the previous embodiment, by means of a channel 12 opening into the upper chamber 13 and of a valve. sequence 14 which supplies the buffer chamber 19 with fluid delimited in part by the drawer 34.
  • the rebound is zero as well as the amount of fluid injected into the buffer chamber 19, which allows the drawer 34, pushed by the spring 21, to select a channel 36-39 corresponding to a striking stroke. lower and a decrease in impact speed.
  • FIG. 3 represents a variant of the apparatus of FIG. 2 in which the channel 12 is equipped with a non-return valve 43 allowing the passage of fluid only from the chamber 13 towards the chamber 19, and in which the chamber 20 , located on the other side of the drawer 34 relative to the chamber 19, is in communication via a channel 17 with the source of pressurized fluid.
  • the non-return valve 43 When the pressure in the chamber 13 is higher than the supply pressure, a certain quantity of fluid can flow through the channel 12, the non-return valve 43 and the channel 15 in the buffer chamber 19.
  • the non-return valve return avoids a flow of fluid from the chamber 19 to the upper chamber when the latter is connected by the distributor 28 to the low pressure channel 22 during the return stroke of the piston.
  • the slide valve 34 is in equilibrium for a pressure in the buffer chamber 19 such that the flow rate which this pressure allows to pass during each cycle in the nozzle 25 is equal to the pulsed flow rate coming from the upper chamber 13 through the nozzle 26.
  • FIG. 4 represents a variant of the apparatus of FIG. 2 in which the channel 12 no longer opens into the upper chamber 13, but into the lower chamber 40.
  • this channel 12 is arranged a sequence valve which, when the pressure at the interior of the lower chamber 40, becomes lower than the pressure for supplying pressurized fluid supplied to the valve through the channel 17, makes it possible to inject into the buffer chamber 19 through the nozzle 26 a certain quantity of fluid supplied through channel 17.
  • the apparatus advantageously comprises, on the channel 47 for supplying the lower chamber 40 with pressurized fluid, a non-return valve 45 allowing free passage of the reflux fluid from the chamber 40 to the channel d 'supply 31.
  • a nozzle 46 mounted on a bypass channel 48, makes it possible to supply the chamber 40 with pressurized fluid to obtain the ascent of the piston 1.
  • the slide valve 34 is in equilibrium for a pressure in the chamber 19 such that the flow rate which this pressure passes through the nozzle 25 is equal to the pulsed flow rate injected by the sequence valve 44 into the buffer chamber 19.
  • the sequence valve 44 injects fluid at the supply pressure into the chamber 19, which increases the pressure inside the latter, and causes the slide to move. against the action of spring 21.
  • the slide 34 discovers control channels 36 to 39 supplying the distributor 28 in a direction of increase in the stroke and the impact speed of the impact piston.
  • the rebound is zero as well as the amount of fluid to be injected into the buffer chamber, which allows the drawer 34 to occupy a position selecting a channel 36 to 39 corresponding to a lower striking stroke.
  • This element 53 relates the high pressure supply channel 31 to the lower chamber 40 when the pressure of the chamber 40 drops below a predetermined value or when the difference between the supply pressure and the pressure of the chamber 40 exceeds a predetermined value.
  • This element 53 therefore makes it possible to maintain a minimum pressure in the chamber 40 avoiding any cavitation in the latter.
  • FIG. 6 represents another variant of this device in which the channel 12 always opens into the lower chamber 40.
  • This channel 12 is equipped with a non-return valve 49 oriented so as to make the passage of fluid from the chamber 40 impossible. towards chamber 19 and allowing only reverse circulation.
  • the chamber 20, located on the other side of the drawer 34, is connected to the duct 31 for supplying fluid under high pressure by a channel 17.
  • the slide valve 34 is in equilibrium for a pressure in the buffer chamber 19, such that the flow rate coming from the chamber 20 via the nozzle 25 is equal to the pulsed flow rate which this pressure allows to evacuate into the chamber 40 through the nozzle 26 and the non-return valve 49.
  • the invention brings a great improvement to the existing technique by providing a method and a device of simple design ensuring an automatic adjustment of the impact parameters to the hardness of the ground in which the tool works.
  • the measurement of the momentary pressure variation following the rebound of the piston on the tool could be carried out by a pressure tap not in the upper chamber or in the lower chamber, as indicated above, but in a chamber communicating with one or the other of these, at the moment of impact and rebound of the piston on the tool.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Fluid-Damping Devices (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Earth Drilling (AREA)
EP87420203A 1986-08-07 1987-07-27 Procédé de régulation des paramètres de percussion du piston de frappe d'un appareil mû par un fluide incompressible sous pression, et appareil pour la mise en oeuvre de ce procédé Expired - Lifetime EP0256955B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87420203T ATE58082T1 (de) 1986-08-07 1987-07-27 Verfahren und vorrichtung zum einstellen der schlagparameter des schlagkolbens einer von einem nicht zusammendrueckbaren fluid angetriebenen vorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8611710 1986-08-07
FR8611710A FR2602448B1 (fr) 1986-08-07 1986-08-07 Procede de regulation des parametres de percussion du piston de frappe d'un appareil mu par un fluide incompressible sous pression, et appareil pour la mise en oeuvre de ce procede

Publications (2)

Publication Number Publication Date
EP0256955A1 EP0256955A1 (fr) 1988-02-24
EP0256955B1 true EP0256955B1 (fr) 1990-11-07

Family

ID=9338285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87420203A Expired - Lifetime EP0256955B1 (fr) 1986-08-07 1987-07-27 Procédé de régulation des paramètres de percussion du piston de frappe d'un appareil mû par un fluide incompressible sous pression, et appareil pour la mise en oeuvre de ce procédé

Country Status (12)

Country Link
US (1) US4800797A (sv)
EP (1) EP0256955B1 (sv)
JP (1) JPS63174884A (sv)
AT (1) ATE58082T1 (sv)
AU (1) AU610513B2 (sv)
CA (1) CA1295533C (sv)
DE (2) DE3766043D1 (sv)
ES (1) ES2018292B3 (sv)
FI (1) FI92477C (sv)
FR (1) FR2602448B1 (sv)
NO (1) NO165180C (sv)
ZA (1) ZA875789B (sv)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0426928B1 (en) * 1989-10-18 1997-06-25 Mauro Vitulano Method to automatically adjust the functional parameters of a percussion apparatus
ES2024251A6 (es) * 1990-05-14 1992-02-16 Tapias Puig Marcelino Perfeccionamientos en la fabricacion de martillos hidraulicos.
DE4019019A1 (de) * 1990-06-14 1991-12-19 Krupp Maschinentechnik Verfahren zur ermittlung charakteristischer kenngroessen eines schlagwerks und einrichtung zur durchfuehrung des verfahrens
DE4036918A1 (de) * 1990-11-20 1992-05-21 Krupp Maschinentechnik Verfahren zur anpassung des arbeitsverhaltens eines schlagwerks an die haerte des zerkleinerungsmaterials und einrichtung zur durchfuehrung des verfahrens
FR2676953B1 (fr) * 1991-05-30 1993-08-20 Montabert Ets Appareil hydraulique a percussions.
JP3378029B2 (ja) * 1991-08-08 2003-02-17 丸善工業株式会社 油圧ブレーカ
ES2065806B1 (es) * 1992-03-11 1997-07-01 Tapias Puig Marcelino Mejoras introducidas en martillos hidraulicos.
FI104959B (sv) 1994-06-23 2000-05-15 Sandvik Tamrock Oy Hydraulisk slaghammare
FR2727891B1 (fr) 1994-12-08 1997-01-24 Montabert Ets Procede et appareil pour la regulation de la course de frappe d'un appareil a percussion mu par un fluide incompressible sous pression
FI104960B (sv) * 1995-07-06 2000-05-15 Sandvik Tamrock Oy Hydraulisk slaghammare
FI104961B (sv) * 1996-07-19 2000-05-15 Sandvik Tamrock Oy Hydrauldriven slaghammare
WO1998004387A1 (fr) * 1996-07-25 1998-02-05 Komatsu Ltd. Defonceuse hydraulique avec dispositif de prevention de mouvement a vide
DE19838838A1 (de) * 1998-08-27 2000-03-02 Delmag Maschinenfabrik Dieselramme
FI121219B (sv) * 2001-10-18 2010-08-31 Sandvik Tamrock Oy Förfarande och apparatur för att monitorera funktion av en slaganordning samt arrangemang för att reglera funktion av en slaganordning
JP2005177899A (ja) * 2003-12-17 2005-07-07 Konan Electric Co Ltd 液圧式打撃装置
SE527921C2 (sv) * 2004-10-20 2006-07-11 Atlas Copco Rock Drills Ab Slagverk
FR2902684B1 (fr) 2006-06-27 2010-02-26 Montabert Roger Procede de commutation de la course de frappe d'un appareil a percussions mu par un fluide incompressible sous pression, et appareil pour la mise en oeuvre de ce procede
SE530524C2 (sv) * 2006-09-13 2008-07-01 Atlas Copco Rock Drills Ab Slagverk, bergborrmaskin inkluderande ett dylikt slagverk och förfarande för styrning av ett slagverk
JP4729012B2 (ja) * 2007-07-12 2011-07-20 有限会社名隆化学 パチンコ機の球受け皿
CA2810914A1 (en) * 2010-09-10 2012-03-15 Rockdrill Services Australia Pty Ltd Improved rock drill
FR2983760B1 (fr) 2011-12-09 2014-08-15 Montabert Roger Procede de commutation de la course de frappe d'un piston de frappe d’un appareil a percussions
DE102013207860B4 (de) * 2013-04-30 2017-06-22 MTU Aero Engines AG Verfahren zum Betreiben eines pneumatischen Nadlers sowie zugehöriger pneumatischer Nadler
FR3027543B1 (fr) * 2014-10-28 2016-12-23 Montabert Roger Appareil a percussions
US9840000B2 (en) * 2014-12-17 2017-12-12 Caterpillar Inc. Hydraulic hammer having variable stroke control
US20160199969A1 (en) * 2015-01-12 2016-07-14 Caterpillar Inc. Hydraulic hammer having variable stroke control
US20160221171A1 (en) * 2015-02-02 2016-08-04 Caterpillar Inc. Hydraulic hammer having dual valve acceleration control system
KR101709673B1 (ko) * 2016-12-13 2017-03-09 대모 엔지니어링 주식회사 2단 오토스트로크 유압 브레이커
JP7210452B2 (ja) * 2017-07-24 2023-01-23 古河ロックドリル株式会社 液圧式打撃装置
FI128135B (sv) * 2017-10-20 2019-10-31 Pneumaxpert Oy Arrangemang med oscillerande cylinder
FR3077753B1 (fr) 2018-02-14 2020-01-31 Montabert Procede de reglage de la course de frappe d’un piston de frappe d’un appareil a percussions, et un appareil a percussions pour la mise en œuvre de ce procede
CN108331582B (zh) * 2018-03-16 2024-02-02 王代朋 全液压石材矿用开采机

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214064A1 (fr) * 1985-07-16 1987-03-11 Etablissements Montabert Procédé de commande du mouvement du piston de frappe d'un appareil à percussions mû par un fluide incompressible sous pression, et appareil pour la mise en oeuvre de ce procédé

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1703061C3 (de) * 1968-03-27 1974-02-14 Fried. Krupp Gmbh, 4300 Essen Hydraulisch betriebener Schubkolbenmotor
US3780621A (en) * 1971-06-07 1973-12-25 Atlas Copco Ab Hydraulic fluid actuated percussion tool
GB1450972A (en) * 1974-06-11 1976-09-29 Klemm G Percussive tool
US4172411A (en) * 1976-06-09 1979-10-30 Mitsui Engineering & Shipbuilding Co., Ltd. Hydraulic hammer
FR2369908A1 (fr) * 1976-11-08 1978-06-02 Montabert Roger Appareil a percussions hydraulique
DE2658455C3 (de) * 1976-12-23 1981-01-22 Fried. Krupp Gmbh, 4300 Essen Druckmittelbetriebenes Schlagwerk
JPS5831483B2 (ja) * 1978-08-14 1983-07-06 川崎重工業株式会社 シリンダ制御装置
SE420057B (sv) * 1980-02-20 1981-09-14 Atlas Copco Ab Hydrauliskt slagverk med mojlighet att reglera slagenergin
FR2509217A1 (fr) * 1981-07-10 1983-01-14 Montabert Ets Appareil a percussions mu par un fluide sous pression
SE8106907L (sv) * 1981-11-20 1983-05-21 Atlas Copco Ab Sett att styra ett slagverk och slagverk
FR2584968B1 (fr) * 1985-07-16 1989-02-17 Montabert Ets Procede de commande du mouvement du piston de frappe d'un appareil a percussions mu par un fluide incompressible sous pression, et appareil pour la mise en oeuvre du procede

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214064A1 (fr) * 1985-07-16 1987-03-11 Etablissements Montabert Procédé de commande du mouvement du piston de frappe d'un appareil à percussions mû par un fluide incompressible sous pression, et appareil pour la mise en oeuvre de ce procédé

Also Published As

Publication number Publication date
EP0256955A1 (fr) 1988-02-24
FI92477B (sv) 1994-08-15
FR2602448B1 (fr) 1988-10-21
DE3766043D1 (de) 1990-12-13
NO165180B (no) 1990-10-01
NO873291L (no) 1988-02-08
JPS63174884A (ja) 1988-07-19
ATE58082T1 (de) 1990-11-15
CA1295533C (fr) 1992-02-11
ZA875789B (en) 1988-04-27
AU610513B2 (en) 1991-05-23
JPH0585311B2 (sv) 1993-12-07
NO165180C (no) 1991-01-09
FI92477C (sv) 1994-11-25
ES2018292B3 (es) 1991-04-01
NO873291D0 (no) 1987-08-06
AU7662087A (en) 1988-02-11
US4800797A (en) 1989-01-31
FI873351A (sv) 1988-02-08
DE256955T1 (de) 1988-06-09
FR2602448A1 (fr) 1988-02-12
FI873351A0 (sv) 1987-08-03

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