EP0012265B1 - Vorrichtung zur Schienenbefestigung - Google Patents

Vorrichtung zur Schienenbefestigung Download PDF

Info

Publication number
EP0012265B1
EP0012265B1 EP79104727A EP79104727A EP0012265B1 EP 0012265 B1 EP0012265 B1 EP 0012265B1 EP 79104727 A EP79104727 A EP 79104727A EP 79104727 A EP79104727 A EP 79104727A EP 0012265 B1 EP0012265 B1 EP 0012265B1
Authority
EP
European Patent Office
Prior art keywords
rail
clamping part
contact surface
support body
rail base
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
Application number
EP79104727A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0012265A1 (de
Inventor
Endre Dr. Kerkápoly
Attila Dr. Horváth
István Dr. Szatmári
György Molnár
János Székely
Bertalan Száraz
György Bagyin
Imre Kovács
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.)
Beton- Es Vasbetonipari Muevek
Original Assignee
Beton- Es Vasbetonipari Muevek
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 Beton- Es Vasbetonipari Muevek filed Critical Beton- Es Vasbetonipari Muevek
Priority to AT79104727T priority Critical patent/ATE4604T1/de
Publication of EP0012265A1 publication Critical patent/EP0012265A1/de
Application granted granted Critical
Publication of EP0012265B1 publication Critical patent/EP0012265B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
    • E01B9/28—Fastening on wooden or concrete sleepers or on masonry with clamp members
    • E01B9/30—Fastening on wooden or concrete sleepers or on masonry with clamp members by resilient steel clips
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
    • E01B9/28—Fastening on wooden or concrete sleepers or on masonry with clamp members

Definitions

  • the invention relates to a device for the immediate, resilient fastening of a rail having a head, a web, and a foot on a threshold, with a support body arranged on the side of the rail foot on the threshold and having an opening which is penetrated by a clamping part designed as a two-armed lever is which abuts an upper contact surface of the opening provided in its longitudinal extent and one end of which exerts a downward pressure on the top of the rail foot and the other end of which is supported on an elastic force storage element, the lever arm of the clamping part supported on the force storage element being at least twice as much long as the lever arm acting on the rail foot.
  • Such a device for rail fastening is known from US-A-3 494 557.
  • This device is designed as a rail fastening unit which comprises a base plate anchored on the threshold and two depressing devices which act on the rail foot parts.
  • Each depressing device contains a clamping part which is mounted in an opening of a support body to form a two-armed lever.
  • the longer lever rests on an energy storage element, which is formed in particular by an elastomeric plastic body.
  • the shorter lever presses the rail foot against the base plate with a downward pressure.
  • the force storage element presses the clamping part upwards with a relatively large force while executing a relatively short path.
  • the energy storage element therefore has a large spring stiffness, i. H. it is a hard feather.
  • the plastic that is used here as the energy storage element is exposed to aging, so that its spring behavior changes over time and the pressure forces to be applied are therefore subject to uncontrollable fluctuations.
  • the clamping part bears against a rounded contact surface of the opening in the support body in order to form a blunt lever axis for the clamping part.
  • the clamping part is not adapted in the region of the lever axis formed by the supporting body to the shape of the abutment surface of the supporting body serving as a contact surface, so that changing lever ratios in the clamping parts inevitably result during assembly.
  • projections are provided on the side of the clamping part facing the rail foot, which fix the clamping part against forces acting outwards and serve as a guide when attaching the clamping part. Nevertheless, the clamping part can move or shift due to the vibration stress on the rail, so that the contact forces change. Therefore constant monitoring and maintenance of the rail fastening are necessary.
  • the known device per rail fastening comprises a base plate arranged between the rail foot and the sleeper and two matching opposing hold-down devices, it is designed to be complicated. This also complicates assembly and is time-consuming.
  • the rails there are two options for supporting the rails forming the track for rail vehicles.
  • the rails On one side the rails are supported by long sleepers or side members, on the other side they are supported by cross sleepers or beams. Accordingly, a distinction is made between long sleeper and short sleeper superstructures.
  • fastening device itself is designed as inexpensively as possible, that it is easy to assemble and that it has a long service life even in the rough railway operation and, if necessary, can be replaced easily and quickly.
  • fastening device exerts a high contact pressure, has flexibility in the vertical direction and with respect to the longitudinal axis of the track and that it also has a suitable resistance to twisting and longitudinal displacement of the rail track.
  • the individual elements of the device should also be able to be replaced independently of one another quickly and easily, and thus the rapid replacement of the crossbar and / or the rail and the setting of the track width. It is a further requirement that the rail fastening can be used on straight lines and in curves as well as in a backlash-free superstructure with brackets, and that if they are inserted into the system of signaling systems or safety devices, their electrically insulated design is also possible.
  • DE-C-2 250 954 describes a device for rail fastening by means of springs of circular cross-section, which has advantageous elastic properties, but on the one hand re-tensioning is necessary for the fastening screw, on the other hand the maximum value of the contact pressure that can be developed by the screw is relatively small. Similar experiences have also been made with the embodiment described in FR-A-2 283 258. In this, the elasticity in the pressure is brought about by means of a leaf spring pressurized by a screw. Another, relatively advantageous type of fastening has been developed in Great Britain, according to which the downward pressure is exerted on the rail foot by means of a screw of a strange shape. However, this construction has the disadvantage that at no point can a greater contact force than about 9810 N be exerted and that a lot of spring steel is required, which is why this solution is very expensive.
  • a similar rail attachment is also discussed in GB-A-1 169715.
  • the essential point of this device can be seen in the fact that the rail foot is pressed down by a leaf spring, which is designed as a double-armed lever and is guided through a bracket concreted into the crossbar.
  • the leaf spring is supported on the rail base as well as on the crossbar by means of plastic pads. Spring steel is also required in very large quantities here, but the contact pressure that can be achieved is relatively low.
  • a base plate which is to be fastened on the threshold, carries the rail and has a bracket with an opening through which a clamping part designed as a two-armed lever is guided.
  • a wedge which is designed as a flat spring, is pushed under one lever, in order to press the other lever arm against the top of the rail foot.
  • rail fastenings are now only referred to as elastic if the change in the clamping force as a function of the vertical displacement of the rail foot is not greater than 2 kN / mm per fastening and if there is at least 5-10 between the unloaded state and the operating state mm large relative displacement can occur.
  • the attachments that do not meet these requirements are so-called rigid attachments.
  • the difference is of a qualitative nature.
  • the characteristic of the elastic fasteners is that they can exert almost the same clamping force despite the always existing dimensional deviations and that this clamping force can be maintained with a negligible deviation during operation. This property of the elastic fasteners enables the track to be kept in operation for a long period of time without maintenance.
  • Eliminating the adverse effects of dimensional deviations is particularly important when fastening rails to concrete sleepers if there are no steel base plates.
  • the precision of the sleepers made of prestressed concrete or reinforced concrete is somewhat less than the precision of the base plates made of hot-rolled steel due to their material and manufacturing technology.
  • the invention has for its object to provide a device for the immediate, resilient fastening of rails on sleepers according to the type specified in such a way that it enables a safe, easy to assemble and at the same time maintenance-free rail fastening.
  • the energy storage element is a helical spring that has a large spring travel at low force, that the upper contact surface in the opening is convex or concave and that the one that comes into contact with this contact surface Surface of the clamping part is complementary to the contact surface.
  • the energy storage element is a helical spring which is relatively simple and inexpensive to manufacture. Furthermore, the coil spring exerts a small force with a large spring travel, so that the coil spring has a small spring stiffness, that is to say it is a so-called soft spring. Such a spring effects damping with regard to the vibration stresses of the rail and the vibrations transmitted to the device via the rail. Also, a soft spring is hardly exposed to fatigue, so that the helical spring in the device according to the invention shows a constant spring behavior over a long period of time, so that a constant contact pressure of the rail foot against the threshold is guaranteed. Therefore, the device according to the invention does not require any maintenance with regard to the design of the energy storage element.
  • the clamping part and the support body have cooperating and complementary surfaces which are convex or concave and which form the lever axis. This results in an easier assembly of the clamping part, since when the clamping part is inserted into the opening of the support body with a suitable position of the complementary surfaces of the support body and clamping part, resistance to further insertion of the clamping part is noticeable.
  • the complementary cooperating surfaces also ensure that a constant and definitely predetermined lever axis is present. As a result, the same leverage ratios and therefore the same contact forces can always be guaranteed.
  • the complementarily designed and cooperating surfaces of the support body and the clamping part also prevent longitudinal and transverse displacement of the clamping part in the fully assembled state of the device, since the cooperating complementary surfaces form a type of locking and securing against displacement without additional separate components having to be provided for this .
  • no maintenance is required with regard to the interaction of the clamping part and support body. Due to the combination of an elastic and plastic deformation occurring when the helical spring as the energy storage element is loaded in the device according to the invention, any dimensional deviations in the sleepers can be compensated for without difficulty, these dimensional deviations being unavoidable for technical reasons.
  • the helical spring is connected to an organ which fixes it in place, in order to be able to clearly secure its position on the threshold, especially during assembly.
  • an intermediate piece of approximately Z-shaped cross section is provided between the rail foot and the support body, the web of which rests on the rail foot, while its a flange plate is arranged between the rail foot and the support body.
  • an elastic and / or electrically insulating insert plate which may have a friction-increasing surface, is provided between the rail foot and the threshold.
  • the rail 7 associated with the railway track has a rail head 7a, a web 7b and a rail foot 7c.
  • the latter is not immediately, but with the insertion of an elastic insert plate 5 on a threshold 8, for. B. on a crossbar made of reinforced concrete or prestressed concrete.
  • a clamping part 1 designed as a double-armed lever serves to press the foot 7c of the rail 7 against the threshold 8.
  • the length a of the longer lever arm 1a of the clamping part 1 is at least twice as long as the length b of the shorter lever arm 1b.
  • the pressing force can advantageously be increased by increasing the ratio a: b. A large pressure force can thus be generated even with an elastic force storage element of small dimensions.
  • the elastic force storage element is designed as a coil spring 2, which is arranged in the vicinity of the end of the longer lever arm 1 a of the clamping part 1. It is possible to accommodate the coil spring in a cylinder casing-like spring housing in order to protect it and to facilitate its installation. It is also advantageous if the helical spring 2 is connected to an organ 6 built into the threshold 8 and fixing its position in relation to the threshold 8.
  • the clamping part 1 is guided through an opening 3a (see FIG. 2) of a support body 3.
  • the clamping part 1 which is designed as a double-armed lever, is supported with a contact surface 1c.
  • This contact surface 1 can be convex or concave, depending on how the contact surface 3b of the opening 3a of the support body 3 is formed.
  • the power transmission occurs between the contact surfaces 1 c and 3b. 1 illustrates a case in which the contact surface 1c is convex, while the surface 3b is concave. lst. the contact surface 1c is made concave, then the contact surface 3b takes on a convex shape.
  • an intermediate piece 4 of Z-shaped cross section which consists of a web 4a and flange plates 4b and 4c.
  • the web 4a serves to support the shorter lever arm 1b, while the flange plate 4b projects between the rail foot 7c and the support body 3.
  • the intermediate piece 4 can for example be made of elastic plastic.
  • the support body 3 on the one hand supports the clamping part 1 designed as a double-armed lever, but on the other hand also prevents a lateral displacement as well as a vertical displacement of the clamping part 1.
  • the support body 3 also prevents the rail 7 itself from being displaced with respect to the center of the track, at the expense of the deformation of the flange plate 4b of the intermediate piece 4.
  • the elasticity of the mounting of the rail 7 is increased by the use of the insert plate 5.
  • the clamping part 1 and the support body 3 are easiest to manufacture from forged steel.
  • the assembly of the device for rail fastening begins with the placement of the insert plate 5 on the threshold 8, followed by the laying of the rail 7. Thereafter, the intermediate piece 4 is placed on the rail foot 7c, and with the help of the organ 6, the elastic force storage member, d. H. the coil spring 2. Finally, the clamping part 1 is pushed from the side of the spring over this through the opening 3a of the support body 3 until the contact surface 1 of the clamping part engages in the contact surface 3b formed in the support body 3 or at least perceptibly securely sticks to it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Railway Tracks (AREA)
  • Supports For Pipes And Cables (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Paper (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Liquid Crystal Substances (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Escalators And Moving Walkways (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Clamps And Clips (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Measuring Volume Flow (AREA)
  • Moving Of Heads (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Massaging Devices (AREA)
EP79104727A 1978-12-13 1979-11-27 Vorrichtung zur Schienenbefestigung Expired EP0012265B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79104727T ATE4604T1 (de) 1978-12-13 1979-11-27 Vorrichtung zur schienenbefestigung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HUBU000908 1978-12-13
HU78BU908A HU175713B (hu) 1978-12-13 1978-12-13 Prishivanie rel'sa

Publications (2)

Publication Number Publication Date
EP0012265A1 EP0012265A1 (de) 1980-06-25
EP0012265B1 true EP0012265B1 (de) 1983-09-07

Family

ID=10994077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104727A Expired EP0012265B1 (de) 1978-12-13 1979-11-27 Vorrichtung zur Schienenbefestigung

Country Status (11)

Country Link
EP (1) EP0012265B1 (enrdf_load_stackoverflow)
JP (1) JPS55119801A (enrdf_load_stackoverflow)
AT (1) ATE4604T1 (enrdf_load_stackoverflow)
BR (1) BR7908081A (enrdf_load_stackoverflow)
DD (1) DD147699A5 (enrdf_load_stackoverflow)
DE (1) DE2966144D1 (enrdf_load_stackoverflow)
HU (1) HU175713B (enrdf_load_stackoverflow)
IN (1) IN152276B (enrdf_load_stackoverflow)
PL (1) PL220315A1 (enrdf_load_stackoverflow)
SU (1) SU1119610A3 (enrdf_load_stackoverflow)
YU (1) YU39642B (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT405657B (de) * 1989-06-06 1999-10-25 Vae Ag Vorrichtung zum festlegen von radlenkern
JPH0354801U (enrdf_load_stackoverflow) * 1989-09-30 1991-05-27
IT201900017354A1 (it) * 2019-09-27 2021-03-27 Francesco Mazzocchi Dispositivo di attacco perfezionato per serraggio di rotaie ferroviarie
CN112030620A (zh) * 2020-07-28 2020-12-04 北京城建设计发展集团股份有限公司 钢轨专用弹力可调夹具
CN116927006B (zh) * 2023-09-14 2023-11-28 四川宏亿复合材料工程技术有限公司 一种用于铁轨减震扣件的垫板
CN119824735B (zh) * 2025-03-03 2025-07-29 河北首科铁路器材有限公司 一种弹性垫板混凝土枕结构及施工方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE646413C (de) * 1937-06-14 Lajos Peter Schienenbefestigung mittels schwingend gelagerter Klemmplatte und Spannkeil
DE642297C (de) * 1937-03-01 Carl Loessl Schienenbefestigung zwischen Rippen der Unterlage mittels in Durchbruechen der Rippen abgestuetzter Klemmplatten
DK43131C (da) * 1928-09-04 1930-10-06 Max Rueping Fremgangsmaade til Fremstilling af Skinnebefæstelser, saaledes fremstillet Skinnebefæstelse og Værktøj til Fremgangsmaadens Udførelse.
DE642720C (de) * 1935-07-26 1937-03-13 Richard Zimmermann Schienenbefestigung auf Rippenunterlegplatten
US3494557A (en) * 1968-03-06 1970-02-10 Brown Co D S Rail holddown units and assembly
FR2228134B1 (enrdf_load_stackoverflow) * 1973-05-03 1980-04-11 Nord Ressorts
US3887128A (en) * 1974-06-13 1975-06-03 Portec Inc Rail fastener

Also Published As

Publication number Publication date
PL220315A1 (enrdf_load_stackoverflow) 1980-10-20
ATE4604T1 (de) 1983-09-15
YU304979A (en) 1983-04-30
DD147699A5 (de) 1981-04-15
IN152276B (enrdf_load_stackoverflow) 1983-12-10
YU39642B (en) 1985-03-20
EP0012265A1 (de) 1980-06-25
BR7908081A (pt) 1980-07-22
JPS55119801A (en) 1980-09-13
SU1119610A3 (ru) 1984-10-15
DE2966144D1 (en) 1983-10-13
HU175713B (hu) 1980-10-28

Similar Documents

Publication Publication Date Title
DE202009004399U1 (de) Führungsplatte für ein System zum Befestigen einer Schiene auf einem Untergrund und ein eine solche Führungsplatte umfassendes System
DE3720381A1 (de) Vorrichtung zur befestigung von eisenbahnschienen auf fester fahrbahn
DE2628685A1 (de) Trag- und befestigungsvorrichtung fuer eine eisenbahnschiene
EP0433224B1 (de) Zusammengesetztes Tragelement
DE1759684A1 (de) Verankerung fuer Fahrschienen von Gleisfahrzeugen
EP0012265B1 (de) Vorrichtung zur Schienenbefestigung
EP0343149B1 (de) Vorrichtung zum Befestigen von Backenschienen in Weichen
DE3423997A1 (de) Vorrichtung zur befestigung von schienen auf holzschwellen
AT402747B (de) Vorrichtung zum befestigen von backenschienen in weichen
EP0199667B1 (de) Elastisches Unterlegteil für Y-Stahlschwellen
DE69516395T2 (de) Verankerungsvorrichtung für einen träger
EP0180937B1 (de) Schalung für Serienfertigteile aus Stahlbeton, vornehmlich für vorgespannte Weichenschwellen
DE4328185C1 (de) Brückenbalken mit einer Befestigung an Träger einer Stahl-Eisenbahnbrücke
DE2017116A1 (de) Bahnschwelle
DE3114219A1 (de) Gelenkkonstruktion fuer den hoch- und brueckenbau
EP0098927B1 (de) Vorrichtung zur Endverankerung mindestens eines als Spannglied im Spannbetonbau eingesetzten Stabes aus Faser-Verbundwerkstoff
DE3107990C2 (de) Anker für eine in Schotter eingebettete Schwelle einer Gleisanlage
DE4031540C2 (de) Schienenlager
DE102010013055A1 (de) Spannklemme
DE2820458A1 (de) Einrichtung zur befestigung einer laufschiene auf einer tragkonstruktion
DE3108532A1 (de) Befestigung fuer brueckenbalken auf traegern von stahlbruecken
DE2919461C2 (enrdf_load_stackoverflow)
DE3220345C2 (de) Befestigungsvorrichtung für Brückenbalken auf Trägern von Stahlbrücken
DE2602869B1 (de) Federnde schienenbefestigung
DE1246005B (de) Schienenbefestigung

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 FR GB IT LU NL SE

ITCL It: translation for ep claims filed

Representative=s name: ING. C. GREGORJ S.P.A.

17P Request for examination filed
ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

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

REF Corresponds to:

Ref document number: 4604

Country of ref document: AT

Date of ref document: 19830915

Kind code of ref document: T

REF Corresponds to:

Ref document number: 2966144

Country of ref document: DE

Date of ref document: 19831013

ET Fr: translation filed
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: 19831130

ET1 Fr: translation filed ** revision of the translation of the patent or the claims
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19840110

Year of fee payment: 5

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

Ref country code: LU

Payment date: 19840117

Year of fee payment: 5

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

Ref country code: FR

Payment date: 19841119

Year of fee payment: 6

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

Ref country code: DE

Payment date: 19841228

Year of fee payment: 6

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

Ref country code: SE

Payment date: 19841231

Year of fee payment: 6

Ref country code: BE

Payment date: 19841231

Year of fee payment: 6

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

Ref country code: AT

Payment date: 19861030

Year of fee payment: 8

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

Ref country code: NL

Payment date: 19861130

Year of fee payment: 8

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

Ref country code: AT

Effective date: 19871127

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

Ref country code: SE

Effective date: 19871128

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

Ref country code: CH

Effective date: 19871130

Ref country code: BE

Effective date: 19871130

BERE Be: lapsed

Owner name: BETON- ES VASBETONIPARI MUVEK

Effective date: 19871130

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

Ref country code: NL

Effective date: 19880601

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
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: FR

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

Effective date: 19880729

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: DE

Effective date: 19880802

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: GB

Effective date: 19881118

EUG Se: european patent has lapsed

Ref document number: 79104727.7

Effective date: 19880912