EP0147262A1 - Schalldämpfendes Gehäuse für pneumatische Bohrhämmer - Google Patents

Schalldämpfendes Gehäuse für pneumatische Bohrhämmer Download PDF

Info

Publication number
EP0147262A1
EP0147262A1 EP84402259A EP84402259A EP0147262A1 EP 0147262 A1 EP0147262 A1 EP 0147262A1 EP 84402259 A EP84402259 A EP 84402259A EP 84402259 A EP84402259 A EP 84402259A EP 0147262 A1 EP0147262 A1 EP 0147262A1
Authority
EP
European Patent Office
Prior art keywords
hammer
exhaust orifice
housing according
exhaust
casing
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
EP84402259A
Other languages
English (en)
French (fr)
Other versions
EP0147262B1 (de
Inventor
Frédéric Etienne Marcel
François Jean Marie Maume
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.)
Charbonnages de France CDF
Original Assignee
Charbonnages de France CDF
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 Charbonnages de France CDF filed Critical Charbonnages de France CDF
Priority to AT84402259T priority Critical patent/ATE34933T1/de
Publication of EP0147262A1 publication Critical patent/EP0147262A1/de
Application granted granted Critical
Publication of EP0147262B1 publication Critical patent/EP0147262B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/11—Arrangements of noise-damping means
    • B25D17/12—Arrangements of noise-damping means of exhaust silencers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/11—Arrangements of noise-damping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F02B77/13—Acoustic insulation
    • 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 subject of the invention is a soundproofing cover intended to contain a pneumatic hammer in order to attenuate the noise produced by the latter and mainly the noise caused at the exhaust by the expansion of the air which leaves this hammer.
  • the hood of the invention is especially useful for the soundproofing of pneumatic hammers of the rotary percussive type installed on a jumbo for drilling in mines and in quarries.
  • the main sources of noise are the exhaust of air, the foil and the body of the air hammer.
  • the total sound energy emitted by the hammer (by the body and by the exhaust of air) varies from 35% to 90% of the total global energy radiated depending on whether it is a light or heavy hammer and that the foil is itself of weak or strong transverse dimension. It is therefore particularly important to reduce the noise emitted by the hammer.
  • the front wall of the casing has an opening for the exit to the atmosphere of the air which comes from the exhaust orifice provided on the hammer. Air circulates freely between this last orifice and the opening through which it escapes to the open air.
  • the main purpose of the invention is to achieve a soundproof casing for an air hammer, the design of which improves efficiency from the point of view of reducing noise due to the exhaust of air.
  • a casing for pneumatic hammer having an air exhaust orifice, composed of easily opening parts and having in one wall an opening for the outlet to the atmosphere of the exhaust air, this outlet opening air being distant from the exhaust orifice, also internally comprises an acoustically absorbent material which generally limits an internal volume around the hammer; according to the invention, the casing cooperates with internal partitions situated on the path going from the exhaust orifice to the air outlet opening, over a substantial fraction of the interior volume to divide the latter into two chambers at less, joined by a communication passage with reduced section.
  • the interior volume is divided into three successive chambers between the exhaust orifice and the outlet opening, in the direction of the length of the casing.
  • the casing plays the role of a pot of successive expansion of the air, like an exhaust in addition to its role of soundproofing hood.
  • a first expansion chamber is created by means of two partitions transverse to the body of the hammer, these partitions being arranged opposite and other of the exhaust port in the longitudinal direction of the hammer; one of these partitions is perforated with several exhaust holes.
  • the air enters a second expansion chamber then borrows a communication passage with reduced section on the side of the hammer opposite to that where the exhaust orifice is located, to reach a third expansion chamber in which opens the air outlet opening.
  • the partitions are directly in contact with the body of the hammer and they are in contact on the side of the casing with the absorbent material which is part of the latter.
  • the absorbent material is advantageously a polyurethane foam burnt on the surface so that, the surface pores being thus closed, it has a closed continuous surface;
  • the metal part of the casing is a composite sheet, commercially available comprising a first external steel sheet, a damping material, a second internal steel sheet.
  • a pneumatic hammer 1 has an orifice 2 for supplying compressed air and an orifice 3 for exhausting the air used.
  • the relative position of these holes 2 and 3 on the hammer may be different depending on the manufacturer; the invention is easily adaptable to any position of these orifices.
  • a casing according to the invention is made in three parts; a sole 4 is intended to be fixed to the movement carriage on which the hammer rests during use. On this sole 4 is disposed in turn the hammer 1 by its own sole lA.
  • a housing body 5 almost entirely contains the hammer 1.
  • a cover 6 is fixed to the body 5 of the housing.
  • the cover 6 and the body 5 are joined in a joint plane using two corresponding perimeter flanges 7, 8 pierced with holes for the passage of bolts.
  • the parting line has a step such that it descends closer to the sole 4 in the front part of the hammer 1 so that this part, where the drill bit is put in place (not shown), is more accessible after removal of the cover 6.
  • the sole 4, the body 5 and the cover 6 are made of a composite sheet coated on its entire inner surface, after making the casing, with an acoustically absorbent material 9.
  • Any suitable absorbent material can be used.
  • the interior absorbent material 9 is a rather firm, open-pore, commercially available polyurethane foam, the exposed surface of which has been burnt so that it becomes continuous, relatively smooth and resists penetration. fats.
  • the composite sheet comprises a first outer steel sheet with a thickness of 3.5 mm, a damping material with a thickness of 0.5 mm and an inner steel sheet with a thickness of 1 mm.
  • the wall of the casing 1 has a thickness of 30mm, ie 5 mm for the composite sheet and 25 mm for the interior absorbent material 9.
  • Such a casing is effective because of its heterogeneous constitution; we could however replace the composite sheet with a heterogeneous synthetic material produced otherwise, for example using a moldable synthetic material loaded with fibers.
  • This internal volume 10 is divided into several successive expansion chambers communicating.
  • this opening 12 straddles the joint plane of the body 5 and the cover 6, which is not shown in the schematic representation of FIGS. 3 and 4.
  • the latter better show the three chambers 11A, 11B, 11C.
  • These are produced by means of two partitions 13A, 13B transverse to the hammer 1 which divide the internal volume 10 into three chambers in the longitudinal direction of the hammer, in an area which leads from the exhaust orifice 3 to the opening outlet 12.
  • the first chamber 11A is located in the central region of the hammer in the longitudinal direction and it contains the exhaust orifice 3.
  • the partition 13A is pierced with several holes 14 which communicate the 1st chamber 11A and the 2nd chamber 11B.
  • partitions 13A and 13B are located on the upper side of the hammer 1 where the exhaust orifice 3 is located; they completely or almost completely cut, in transverse direction, the internal volume 10 but there remain on the opposite side or lower side of the hammer 1, between its sole 1A and its body, two symmetrical passages 15 with relative section vement weak and that could be partially closed if necessary, which communicate the second chamber 11B with the third chamber 11C.
  • the partitions 13A, 13B can be produced in many equivalent ways; they can be an integral part of the casing, for example of the cover 6, and come into contact with the external surface of the hammer. They can also be fixed to the surface of the hammer so that the casing comes to bear against their edge by its internal surface or more exactly by the internal surface of the insulating material 9 which forms part of it. In the example described here, another variant has been produced.
  • the partitions 13A, 13B are the two end walls in the longitudinal direction of a box 13 better visible in FIG. 1, inverted on the upper face of the hammer, to which it is fixed, to contain the exhaust orifice 3. This box 13 has a flat bottom 13C against which the internal face of the absorbent material 9 which is part of the cover 6 bears.
  • the casing has, for the passage of a connection pipe, an opening 16 which is also, preferably, astride the joint plane between the body 5 and cover 6.
  • the partitions 13A, 13B are shaped and arranged as a function of the relative situation of the supply orifice 2 and the exhaust orifice 3 so as to provide the desired expansion chambers between the latter and an outlet opening 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Pipe Accessories (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP84402259A 1983-11-10 1984-11-09 Schalldämpfendes Gehäuse für pneumatische Bohrhämmer Expired EP0147262B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84402259T ATE34933T1 (de) 1983-11-10 1984-11-09 Schalldaempfendes gehaeuse fuer pneumatische bohrhaemmer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8317900A FR2554752B1 (fr) 1983-11-10 1983-11-10 Carter insonorisant pour marteau pneumatique de foration
FR8317900 1983-11-10

Publications (2)

Publication Number Publication Date
EP0147262A1 true EP0147262A1 (de) 1985-07-03
EP0147262B1 EP0147262B1 (de) 1988-06-08

Family

ID=9293991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402259A Expired EP0147262B1 (de) 1983-11-10 1984-11-09 Schalldämpfendes Gehäuse für pneumatische Bohrhämmer

Country Status (9)

Country Link
US (1) US4624339A (de)
EP (1) EP0147262B1 (de)
JP (1) JPS60173288A (de)
AT (1) ATE34933T1 (de)
AU (1) AU562897B2 (de)
DE (1) DE3471897D1 (de)
ES (1) ES291672Y (de)
FR (1) FR2554752B1 (de)
ZA (1) ZA848781B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991017870A1 (en) * 1990-05-23 1991-11-28 Outokumpu Oy Hydraulic impact hammer
EP0695602A1 (de) * 1994-07-04 1996-02-07 Krupp Maschinentechnik Gesellschaft Mit Beschränkter Haftung Hydraulikhammer mit Bedüsungsanordnung zur Staubbindung
EP0935058A3 (de) * 1998-02-06 2000-09-06 Isuzu Ceramics Research Institute Co., Ltd. Kühler und Maschinenlärmschutzumhüllung
EP2105261A1 (de) * 2008-03-27 2009-09-30 AEG Electric Tools GmbH Elektrowerkzeug, insbesondere Bohr- und/oder Meißelhammer

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5419404A (en) * 1990-05-23 1995-05-30 Bretec Oy Hydraulic impact hammer
US5272285A (en) * 1992-08-20 1993-12-21 Scott Mfg., Inc. Sound attenuating machinery cover
US6067409A (en) * 1996-06-28 2000-05-23 Lsi Logic Corporation Advanced modular cell placement system
FI108561B (fi) * 1998-09-29 2002-02-15 Tamrock Oy Kotelo kallionporauslaitteen äänen eristämiseksi ja sovitelma kallionporauslaitteen yhteydessä
KR200207572Y1 (ko) * 1998-12-04 2001-01-15 이원해 유압식 착암기의 방음 방진 장치
US6220369B1 (en) * 2000-09-20 2001-04-24 Hey Yeh Scrap removing and tool cooling device for a front holding end of a tool spindle of a machine tool
JP3740694B2 (ja) * 2002-02-22 2006-02-01 日立工機株式会社 電動工具
US20070246237A1 (en) * 2006-04-24 2007-10-25 Emile Homsi Vibration dampening of a power tool
US7681690B2 (en) * 2007-07-13 2010-03-23 Longyear Tm, Inc. Noise abatement device for a pneumatic tool
DE102008063113A1 (de) * 2008-01-09 2009-07-16 Marquardt Gmbh Elektrowerkzeug
FR2927010B1 (fr) * 2008-01-31 2010-06-11 Sullair Europ Dispositif de marteau piqueur a air comprime
US7735603B2 (en) * 2008-05-28 2010-06-15 Longyear Tm, Inc. Noise reducing device for a pneumatic tool
WO2010150185A1 (en) * 2009-06-23 2010-12-29 Compair (Sa) (Pty) Ltd Muffler for pneumatic rock drill
US8215449B2 (en) * 2009-12-02 2012-07-10 Longyear Tm, Inc. Muffler system for noise abatement and ice control
US9153225B2 (en) 2011-12-16 2015-10-06 Emerson Climate Technologies, Inc. Sound enclosure for enclosing a compressor assembly
EP3113905B1 (de) * 2014-03-03 2019-04-24 Noretud Industries Dichtungspositionierungsvorrichtung und ihre verwendung

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1401587A (fr) * 1964-06-09 1965-06-04 Silencieux pour outils actionnés par un moteur à air comprimé
FR1416101A (fr) * 1964-11-19 1965-10-29 Cons Mining & Smelting Co Silencieux pour outils pneumatiques percutants
US3481411A (en) * 1968-02-19 1969-12-02 Black & Decker Mfg Co Sonic tool with means for reducing noise level
FR2209311A5 (de) * 1972-12-05 1974-06-28 Maco Meudon Sa
FR2240652A5 (en) * 1973-08-10 1975-03-07 Spit Soc Prospect Inv Techn Engine-driven compressor set - outer housing masks air inlets and outlets in inner noise suppressing housing
FR2420043A1 (fr) * 1978-03-16 1979-10-12 Maco Meudon Sa Centrale mobile insonorisee pour la distribution d'air comprime
FR2425301A1 (fr) * 1978-05-12 1979-12-07 Sig Schweiz Industrieges Appareil de percussion a commande pneumatique
EP0009229A1 (de) * 1978-09-18 1980-04-02 Samuel David Gunning Presslufthammer
DE2913330A1 (de) * 1979-04-03 1980-10-16 Turmag Turbo Masch Ag Handgefuehrte druckluftbohrmaschine
EP0062009A2 (de) * 1981-03-31 1982-10-06 PANDA S.r.l. Schalldämpfer für pneumatische Apparatur

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA755872A (en) * 1967-04-04 A. W. Clarke Ronald Acoustic shield for a tool powered by a gas-operated motor
US2789653A (en) * 1954-05-17 1957-04-23 Fannen John Muffler attachment for air driven tools of the impact type
US3255844A (en) * 1964-01-16 1966-06-14 Gardner Denver Co Multi-passage silencer for pneumatic tool
US3757875A (en) * 1971-11-24 1973-09-11 Kent Air Tool Co Air hammer and combined support and muffler therefor
US4113049A (en) * 1976-04-14 1978-09-12 Lieber Raymond S Noise reduction device for impact tools
US4327807A (en) * 1978-09-19 1982-05-04 Maco-Meudon Percussion tool casing
CA1120406A (en) * 1979-02-13 1982-03-23 Stanley L. Baldwin Mufflers for percussive pneumatic machines
US4407390A (en) * 1979-09-19 1983-10-04 Joy Manufacturing Company Pneumatic motor
US4346783A (en) * 1980-09-26 1982-08-31 Rensselaer Polytechnic Institute Apparatus for treating flowing working gases particularly to reduce the noise in operation thereof

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1401587A (fr) * 1964-06-09 1965-06-04 Silencieux pour outils actionnés par un moteur à air comprimé
FR1416101A (fr) * 1964-11-19 1965-10-29 Cons Mining & Smelting Co Silencieux pour outils pneumatiques percutants
US3481411A (en) * 1968-02-19 1969-12-02 Black & Decker Mfg Co Sonic tool with means for reducing noise level
FR2209311A5 (de) * 1972-12-05 1974-06-28 Maco Meudon Sa
FR2240652A5 (en) * 1973-08-10 1975-03-07 Spit Soc Prospect Inv Techn Engine-driven compressor set - outer housing masks air inlets and outlets in inner noise suppressing housing
FR2420043A1 (fr) * 1978-03-16 1979-10-12 Maco Meudon Sa Centrale mobile insonorisee pour la distribution d'air comprime
FR2425301A1 (fr) * 1978-05-12 1979-12-07 Sig Schweiz Industrieges Appareil de percussion a commande pneumatique
EP0009229A1 (de) * 1978-09-18 1980-04-02 Samuel David Gunning Presslufthammer
DE2913330A1 (de) * 1979-04-03 1980-10-16 Turmag Turbo Masch Ag Handgefuehrte druckluftbohrmaschine
EP0062009A2 (de) * 1981-03-31 1982-10-06 PANDA S.r.l. Schalldämpfer für pneumatische Apparatur

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BAUMASCHINE UND BAUTECHNIK, vol. 12, no. 9, septembre 1965, pages 421-423, Wiesbaden, DE; G. GARBOTZ: "Lärmabwehr in Baubetrieb und bei Baumaschinen" *
GLÜCKAUF, vol. 118, no. 23, décembre 1982, pages 1181-1183, Bochum, DE; B. BÄRENDORF: "Stand der Lärmminderung im Steinkohlenbergbau an der Ruhr" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991017870A1 (en) * 1990-05-23 1991-11-28 Outokumpu Oy Hydraulic impact hammer
EP0695602A1 (de) * 1994-07-04 1996-02-07 Krupp Maschinentechnik Gesellschaft Mit Beschränkter Haftung Hydraulikhammer mit Bedüsungsanordnung zur Staubbindung
EP0935058A3 (de) * 1998-02-06 2000-09-06 Isuzu Ceramics Research Institute Co., Ltd. Kühler und Maschinenlärmschutzumhüllung
EP2105261A1 (de) * 2008-03-27 2009-09-30 AEG Electric Tools GmbH Elektrowerkzeug, insbesondere Bohr- und/oder Meißelhammer

Also Published As

Publication number Publication date
AU562897B2 (en) 1987-06-18
ES291672Y (es) 1987-01-16
AU3529784A (en) 1985-05-16
DE3471897D1 (en) 1988-07-14
ES291672U (es) 1986-05-01
EP0147262B1 (de) 1988-06-08
FR2554752B1 (fr) 1986-12-26
ZA848781B (en) 1985-07-31
ATE34933T1 (de) 1988-06-15
US4624339A (en) 1986-11-25
FR2554752A1 (fr) 1985-05-17
JPS60173288A (ja) 1985-09-06

Similar Documents

Publication Publication Date Title
EP0147262B1 (de) Schalldämpfendes Gehäuse für pneumatische Bohrhämmer
AR024278A1 (es) Caja de baja profundidad apilable con estructura de manija
FR2549910A1 (fr) Bloc de raccordement pneumatique
CA2488818A1 (fr) Procede de fabrication d'un panneau acoustique a double resonateur au moins
FR2723398A1 (fr) Appareil de travail avec moteur a combustion interne
EP1695872A1 (de) Mehrschichtige, schallisolierende Vorrichtung, die den Anforderungen des Fussgängeraufpralls genügt und für eine Motorraumkomponente geeignet ist
FR2722278A1 (fr) Silencieux pour motocompresseurs d'appareils de refrigeration
USD492061S1 (en) Combination cigar lighter and cutter
CA1265396A (fr) Carter insonorisant pour marteau pneumatique de foration
FR2858589A1 (fr) Panneau de renfort multifonction d'un capot de vehicule automobile
FR3085437A1 (fr) Structure d’entree d’air d’une nacelle d’aeronef
CA1110225A (fr) Outil de forage rotatif equipe d'un dispositif de percussion
USD490538S1 (en) Window
USD533202S1 (en) Router bit
FR3074227A1 (fr) Structure interne d'un conduit d'ejection primaire
FR2773041A1 (fr) Tunnel acoustique
FR2566339A1 (fr) Dispositif insonorise d'extraction d'air de vehicules automobiles
EP1364891A1 (de) Belüftungsvorrichtung durch plötzliches Ablassen von Druckluft mit einem verbesserten Auswerfenrohr
JP2002206413A (ja) 消音器
EP1052201A1 (de) Sauggreifer
FR3061933A1 (fr) Structure interne d'un conduit d'ejection primaire
FR2827323A1 (fr) Element de construction isolant
FR2710284A1 (fr) Appareil pneumatique à percussion du type marteau-piqueur ou brise-béton.
WO2000026487A1 (fr) Bardage thermiquement isolant et acoustiquement absorbant
USD492821S1 (en) Fiber cover for a fire extinguisher

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

Designated state(s): AT BE CH DE GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19851216

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

Owner name: CHARBONNAGES DE FRANCE, ETABLISSEMENT PUBLIC DITE:

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

Owner name: CHARBONNAGES DE FRANCE, ETABLISSEMENT PUBLIC DIT:

17Q First examination report despatched

Effective date: 19870630

ITF It: translation for a ep patent filed

Owner name: GUZZI E RAVIZZA S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE GB IT LI LU NL SE

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

Ref country code: NL

Effective date: 19880608

Ref country code: AT

Effective date: 19880608

REF Corresponds to:

Ref document number: 34933

Country of ref document: AT

Date of ref document: 19880615

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3471897

Country of ref document: DE

Date of ref document: 19880714

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

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

Effective date: 19881130

Ref country code: LI

Effective date: 19881130

Ref country code: CH

Effective date: 19881130

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: BE

Effective date: 19891130

BERE Be: lapsed

Owner name: CHARBONNAGES DE FRANCE

Effective date: 19891130

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

Ref country code: GB

Payment date: 19901005

Year of fee payment: 7

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

Ref country code: DE

Payment date: 19901116

Year of fee payment: 7

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

Ref country code: SE

Payment date: 19901119

Year of fee payment: 7

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

Ref country code: GB

Effective date: 19911109

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

Ref country code: SE

Effective date: 19911110

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920801

EUG Se: european patent has lapsed

Ref document number: 84402259.0

Effective date: 19920604