CA1195261A - Winding gear of an elevator - Google Patents
Winding gear of an elevatorInfo
- Publication number
- CA1195261A CA1195261A CA000420556A CA420556A CA1195261A CA 1195261 A CA1195261 A CA 1195261A CA 000420556 A CA000420556 A CA 000420556A CA 420556 A CA420556 A CA 420556A CA 1195261 A CA1195261 A CA 1195261A
- Authority
- CA
- Canada
- Prior art keywords
- casing
- shaft
- load
- winding gear
- bearing
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
- Types And Forms Of Lifts (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Measurement Of Current Or Voltage (AREA)
- Moving Of Heads (AREA)
- Lock And Its Accessories (AREA)
- Coil Winding Methods And Apparatuses (AREA)
- Paper (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
Winding gear of an elevator, adapted for lifting a load, gear including a casing and an output shaft having one end extending out of the casing and on which is mounted a cable pulley for supporting the load, which load exerts on the cable pulley and in turn radially on the shaft a force acting in a predetermined direction.
The output shaft is carried by two bearings within the casing and by a third bearing lying outside the casing and carrying the extending end of the shaft. Springs support and resiliently bias the third bearing in a direction, radially of the shaft, which is in opposition to the predetermined direction mentioned above.
Winding gear of an elevator, adapted for lifting a load, gear including a casing and an output shaft having one end extending out of the casing and on which is mounted a cable pulley for supporting the load, which load exerts on the cable pulley and in turn radially on the shaft a force acting in a predetermined direction.
The output shaft is carried by two bearings within the casing and by a third bearing lying outside the casing and carrying the extending end of the shaft. Springs support and resiliently bias the third bearing in a direction, radially of the shaft, which is in opposition to the predetermined direction mentioned above.
Description
26~
The present invention relates to a winding gear of an elevator or lift adapted to lift a load, gear which includes a casing ha~ing a pair of shaft bearings which carries an output shaft having an end portion that extends out of the casing, a cable pulley being mounted on the shaft extending end portion for supporting the load, which load exerts on the cable pulley and i~ turn on the shaft a radial ~orce acting in a predetermined direction, there being further provided a third bearing in which the shaft extending end portion is journalled, the cable pulley being located between the casing and this third pulley.
Such winding gears comprising three bearings for the output shaft are currently used when the load borne by the cable pulley is large enough that arranging the cable pulley in overhanging fashion would require unduly increasing the ~imensions of the output shaft and, as well, of the bearings and other components of the winding gear associated therewith. This is particularly the case, for instance, in elevators capable of trans-porting a large number of people and for certain goods-lifts. The positioning, at the extreme end of the out-put shaft, of this supplementary bearing separately secured to a base plate supporting the winch casing or to a base plate adjacent to it, requires however an important alignment work. With such a hyperstatic system, if the alignment of the bearings is not perfect, there is a chance that one of the bearings and/or the output shaft wear out rapldly or that the output shaft break due to the stresses resulting from the mounting of this third bearing.
German application No. ST 14~5, granted 2.7 53, shows an elevator winch gear in which, to avoid the use of a third bearing, the winch casing is provided with a stationary cylindrical sheath which extends past the ;2~
casing and within which the output shaft of the winch is rotatably housed. The cable pulley is rotatably mounted on the end of the cylindrical sheath and its hub has a driving nose keyed t~ the end of the output sha~t which projects out of the sheath. Such a solution has the advantage to free the output shaft of radial stresses resulting from the load which is thus supported by the bearing constituted by the stationary cylindrical sheath.
In this ~anner, the risks that the driving shaft break are reduced. However, the necessity of providing a stationary sheath acting as an inner bearing for the output shaft leads to a substantial increase in the dimenslons of the winch casing and such a solution is relatively complicated and costly, namely because it requires a particular shaping of the hub of the cable pulley.
The purpose of the present invention is to provide a lift or elevator winch gear which, while being of simple construction, makes it possible to facilitate the assembling of the gear and to avoid any risk that the output shaft break.
In accordance with the present invention, this object is achieved by the provision,with a winding gear of the aforesaid type,of means supporting and resiliently biasing the third bearing in a direction, radially of the shaft extending end portion, which is in opposition to the predetermined direction, these means being further adjustable so as to be able to exert on the third bearing a force which is at least equal to the force exerted by the load on the shaft extending end portion.
The major advantage of the present invention resides namely in that it makes it possible to apply a prestress on the output shaft in a radial direction which is opposite that of the force exerted by the load.
In this manner, when the cable pulley is subjected to a ' load, the strain on the bearings of the w.inch casing is relieved and the working rate of the output shaft is appreciably reduced and, consaquently, its fatigue~ As a result, the invention permits not only to avoid rupturing the shaft but it also allows, up to a certain ``i;~3, . 2a -26~
extent, to reduce its dimensions and that of the elements, such as the bearings, which are directly associtated with it. It thus becomes possible to design a li~hter and less costly lift or elevator winding gear, for a predetermined load. Likewise and within permissible limits, the admissible load may ~e increased for a predetermined type of winding gear.
In accordance with a preferred embodiment of the invention, the aforesaid bearing means comprise:
support means; a bias adjusting device mounted on the support means, and at least one spring havin~ one end applied against the third bearing and the other end applied against the adjusting device whereby the bias applied by the spring may be adjusted by the adjusting means.
The aforesaid support means may preferably comprise: a chassis on which the casing is fixed; an upright member secured to the chassis; a bracket on which the bias adjusting device is mounted and means selectively positioning the bracket by rotation thereof about the axis of the shaft and securing the bracket to the upright member in the selected position.
A preferred embodiment of the invention is described hereinafter, by way of example, with reference to the appended drawing wherein:
Fig. 1 is a schematic view partly in elevation and partly in cross-section of an elevator or lift winding gear made according to the invention, and Fig. 2 is a schematic side elevation view of the winding gear of Figure 1.
Referring to the drawing, there is shown a base plate or winch chassis 1 intended to be located in the lift winding gear room and on which is secured a winch casing 2 containing all or a portion of the non-illustrated li~t driving mechanism such as an endless-screw reducer, a braking system or any other con-ventional parbs associated wi-th the non~illustrated driving motor.
An output shaft 3 is carried by two bearings, not shown, provided within the winch casing 2 and on which is mounted a cable or yripping pulley 4 to which are respectively suspended, through cables 5, the lift or elevator cab and its counterweight, not shown, of the elevator or lift.
An auxiliary or third bearing 7 is located outwardly of the winch casing 2, at the extreme end 3.1 of the output shaft 3. The end of this third bearing 7 has a rectilinear face 7.1 (Figure 2), against which supporting and resiliently biasing means are applied.
More specifically, the latter means comprises a coil spring ~ of which one end bears agai~st the face 7.1 while the other end bears against the bottom of a cup-shaped guide 9 moun-ted at the end of a screw 10 which is part of a device for adjusting the tension of the said screw 10 and a nut assembly carried by a ben-t part 12.1 of a bracket 12 capable of being oriented by rotation about the output shaft 3. The aforesaid supporting and resiliently biasing means further includes an upright member 13 solid with the base plate or winch chassis 1 and to which the bracket 12, once properly oriented, may be secured by means of three securing screws 14 (Figure 2). The angle of rotation allowed the bracket 12 with respect to the upright member 13 is sufficient for, during mounting and in relation to the resultant of the cables 5 and 6, -the elastic force R of the spring 8 to bias the third bearing 7 and consequently the output shaft 3 radially in a direction which is opposite that of the force G acting on the output shaft 3 and resulting from the cable puIley 4 supporting the load.
,~ _ : '.
The dimensions and the characteristics of the coil spring 8 are selected in relation to -the force G, in such a manner that a prestress oE the output shaft 3 may be obtained by a simple adjustment of the tension in the spring 8 by means of the screw 10, prestress which is compensated once the load is supported by the cable pulley 4. Thus, any danger that the output shaft 3 break by fatigue, is practically eliminated and alignment of the bearin~s is no longer necessary during assembly.
It goes without saying that, in the above embodiment, only such elements as are essential to the invention have been described in support of a purely schematic illus-tration. Details of construction, such as those relating to guiding of the spring and/or attachment of elements which are within the skill o~ the man in the art have not been illustrated. Similarly, in order to produce the elastic force, it is possible to use several simultaneously acting springs for one or several elements made of a material capable of achieving similar results. Finally, it is also whithin the scope of the present invention to provide, for instance through hydrauli.c means, that adjustment of the elastic force applied to the third bearing be made in relation -to variations in the load supported by the cable pulley.
The present invention relates to a winding gear of an elevator or lift adapted to lift a load, gear which includes a casing ha~ing a pair of shaft bearings which carries an output shaft having an end portion that extends out of the casing, a cable pulley being mounted on the shaft extending end portion for supporting the load, which load exerts on the cable pulley and i~ turn on the shaft a radial ~orce acting in a predetermined direction, there being further provided a third bearing in which the shaft extending end portion is journalled, the cable pulley being located between the casing and this third pulley.
Such winding gears comprising three bearings for the output shaft are currently used when the load borne by the cable pulley is large enough that arranging the cable pulley in overhanging fashion would require unduly increasing the ~imensions of the output shaft and, as well, of the bearings and other components of the winding gear associated therewith. This is particularly the case, for instance, in elevators capable of trans-porting a large number of people and for certain goods-lifts. The positioning, at the extreme end of the out-put shaft, of this supplementary bearing separately secured to a base plate supporting the winch casing or to a base plate adjacent to it, requires however an important alignment work. With such a hyperstatic system, if the alignment of the bearings is not perfect, there is a chance that one of the bearings and/or the output shaft wear out rapldly or that the output shaft break due to the stresses resulting from the mounting of this third bearing.
German application No. ST 14~5, granted 2.7 53, shows an elevator winch gear in which, to avoid the use of a third bearing, the winch casing is provided with a stationary cylindrical sheath which extends past the ;2~
casing and within which the output shaft of the winch is rotatably housed. The cable pulley is rotatably mounted on the end of the cylindrical sheath and its hub has a driving nose keyed t~ the end of the output sha~t which projects out of the sheath. Such a solution has the advantage to free the output shaft of radial stresses resulting from the load which is thus supported by the bearing constituted by the stationary cylindrical sheath.
In this ~anner, the risks that the driving shaft break are reduced. However, the necessity of providing a stationary sheath acting as an inner bearing for the output shaft leads to a substantial increase in the dimenslons of the winch casing and such a solution is relatively complicated and costly, namely because it requires a particular shaping of the hub of the cable pulley.
The purpose of the present invention is to provide a lift or elevator winch gear which, while being of simple construction, makes it possible to facilitate the assembling of the gear and to avoid any risk that the output shaft break.
In accordance with the present invention, this object is achieved by the provision,with a winding gear of the aforesaid type,of means supporting and resiliently biasing the third bearing in a direction, radially of the shaft extending end portion, which is in opposition to the predetermined direction, these means being further adjustable so as to be able to exert on the third bearing a force which is at least equal to the force exerted by the load on the shaft extending end portion.
The major advantage of the present invention resides namely in that it makes it possible to apply a prestress on the output shaft in a radial direction which is opposite that of the force exerted by the load.
In this manner, when the cable pulley is subjected to a ' load, the strain on the bearings of the w.inch casing is relieved and the working rate of the output shaft is appreciably reduced and, consaquently, its fatigue~ As a result, the invention permits not only to avoid rupturing the shaft but it also allows, up to a certain ``i;~3, . 2a -26~
extent, to reduce its dimensions and that of the elements, such as the bearings, which are directly associtated with it. It thus becomes possible to design a li~hter and less costly lift or elevator winding gear, for a predetermined load. Likewise and within permissible limits, the admissible load may ~e increased for a predetermined type of winding gear.
In accordance with a preferred embodiment of the invention, the aforesaid bearing means comprise:
support means; a bias adjusting device mounted on the support means, and at least one spring havin~ one end applied against the third bearing and the other end applied against the adjusting device whereby the bias applied by the spring may be adjusted by the adjusting means.
The aforesaid support means may preferably comprise: a chassis on which the casing is fixed; an upright member secured to the chassis; a bracket on which the bias adjusting device is mounted and means selectively positioning the bracket by rotation thereof about the axis of the shaft and securing the bracket to the upright member in the selected position.
A preferred embodiment of the invention is described hereinafter, by way of example, with reference to the appended drawing wherein:
Fig. 1 is a schematic view partly in elevation and partly in cross-section of an elevator or lift winding gear made according to the invention, and Fig. 2 is a schematic side elevation view of the winding gear of Figure 1.
Referring to the drawing, there is shown a base plate or winch chassis 1 intended to be located in the lift winding gear room and on which is secured a winch casing 2 containing all or a portion of the non-illustrated li~t driving mechanism such as an endless-screw reducer, a braking system or any other con-ventional parbs associated wi-th the non~illustrated driving motor.
An output shaft 3 is carried by two bearings, not shown, provided within the winch casing 2 and on which is mounted a cable or yripping pulley 4 to which are respectively suspended, through cables 5, the lift or elevator cab and its counterweight, not shown, of the elevator or lift.
An auxiliary or third bearing 7 is located outwardly of the winch casing 2, at the extreme end 3.1 of the output shaft 3. The end of this third bearing 7 has a rectilinear face 7.1 (Figure 2), against which supporting and resiliently biasing means are applied.
More specifically, the latter means comprises a coil spring ~ of which one end bears agai~st the face 7.1 while the other end bears against the bottom of a cup-shaped guide 9 moun-ted at the end of a screw 10 which is part of a device for adjusting the tension of the said screw 10 and a nut assembly carried by a ben-t part 12.1 of a bracket 12 capable of being oriented by rotation about the output shaft 3. The aforesaid supporting and resiliently biasing means further includes an upright member 13 solid with the base plate or winch chassis 1 and to which the bracket 12, once properly oriented, may be secured by means of three securing screws 14 (Figure 2). The angle of rotation allowed the bracket 12 with respect to the upright member 13 is sufficient for, during mounting and in relation to the resultant of the cables 5 and 6, -the elastic force R of the spring 8 to bias the third bearing 7 and consequently the output shaft 3 radially in a direction which is opposite that of the force G acting on the output shaft 3 and resulting from the cable puIley 4 supporting the load.
,~ _ : '.
The dimensions and the characteristics of the coil spring 8 are selected in relation to -the force G, in such a manner that a prestress oE the output shaft 3 may be obtained by a simple adjustment of the tension in the spring 8 by means of the screw 10, prestress which is compensated once the load is supported by the cable pulley 4. Thus, any danger that the output shaft 3 break by fatigue, is practically eliminated and alignment of the bearin~s is no longer necessary during assembly.
It goes without saying that, in the above embodiment, only such elements as are essential to the invention have been described in support of a purely schematic illus-tration. Details of construction, such as those relating to guiding of the spring and/or attachment of elements which are within the skill o~ the man in the art have not been illustrated. Similarly, in order to produce the elastic force, it is possible to use several simultaneously acting springs for one or several elements made of a material capable of achieving similar results. Finally, it is also whithin the scope of the present invention to provide, for instance through hydrauli.c means, that adjustment of the elastic force applied to the third bearing be made in relation -to variations in the load supported by the cable pulley.
Claims (5)
1. Winding gear of an elevator adapted for lifting a load and including: a casing having a pair of shaft bearings therein; an output shaft carried by said casing bearings, said shaft having an end portion extending out of said casing; a cable pulley mounted on said shaft extending end portion for supporting the said load, which load exerts on said cable pulley and in turn on said shaft extending end portion, radially thereof, a force acting in a predetermined direction;
and a third bearing in which said shaft extending end portion is journalled, said cable pulley being located between said casing and said third pulley, said winding gear being characterized in that it comprises:
- means supporting and resiliently biasing said third bearing in a direction, radially of said shaft, which is in opposition to said predetermined direction, said means being further adjustable 50 as to be able to exert on said third bearing a force at least equal to the force exerted by the load on said shaft extending end portion.
and a third bearing in which said shaft extending end portion is journalled, said cable pulley being located between said casing and said third pulley, said winding gear being characterized in that it comprises:
- means supporting and resiliently biasing said third bearing in a direction, radially of said shaft, which is in opposition to said predetermined direction, said means being further adjustable 50 as to be able to exert on said third bearing a force at least equal to the force exerted by the load on said shaft extending end portion.
2. Winding gear according to claim 1, wherein said adjustable supporting and biasing means comprises:
support means; a bias adjusting device mounted on said support means, and at least one spring having one end applied against said third bearing and the other end applied against said adjusting device whereby the bias applied by said at least one spring may be adjusted by said adjusting device.
support means; a bias adjusting device mounted on said support means, and at least one spring having one end applied against said third bearing and the other end applied against said adjusting device whereby the bias applied by said at least one spring may be adjusted by said adjusting device.
3. Winding gear according to claim 2, wherein said support means is solid with said casing.
4. Winding gear according to claim 2, including a base plate on which said casing is fixed and wherein said support means includes an upright member secured to said base plate.
5. Winding gear according to claim 2, wherein said support means comprises: a chassis on which said casing is fixed, an upright member secured to said chassis; a bracket on which said bias adjusting device is mounted and means selectively positioning said bracket by rotation thereof about the axis of said shaft and securing said bracket to said upright member in said selected position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH112982A CH646118A5 (en) | 1982-02-24 | 1982-02-24 | ELEVATOR WINCH. |
| CH1129/82-8 | 1982-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1195261A true CA1195261A (en) | 1985-10-15 |
Family
ID=4203165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000420556A Expired CA1195261A (en) | 1982-02-24 | 1983-01-31 | Winding gear of an elevator |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0087579B1 (en) |
| AT (1) | ATE18186T1 (en) |
| CA (1) | CA1195261A (en) |
| CH (1) | CH646118A5 (en) |
| DE (1) | DE3362224D1 (en) |
| ES (1) | ES8401414A1 (en) |
| FI (1) | FI72495C (en) |
| HU (1) | HU187481B (en) |
| MA (1) | MA19710A1 (en) |
| NO (1) | NO155389C (en) |
| PT (1) | PT76152B (en) |
| ZA (1) | ZA8354B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765671A (en) * | 2012-07-19 | 2012-11-07 | 山起重型机械股份公司 | Hoist roller and speed reducer connecting device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10108803C1 (en) * | 2001-02-19 | 2002-06-20 | Atecs Mannesmann Ag | Hoist cable drum drive has rigid frame and transmission housing lying freely on frame on side facing drum |
| CN102515002B (en) * | 2011-12-20 | 2013-12-25 | 启东大同电机有限公司 | Flexibility-adjustable transmission mechanism of construction lifter |
| CN104370192A (en) * | 2014-10-20 | 2015-02-25 | 启东大同电机有限公司 | Dual-braking transmission mechanism of construction hoist |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE536115C (en) * | 1931-11-02 | Demag Akt Ges | Winch with drum supported on both sides | |
| BE664573A (en) * | ||||
| DE594339C (en) * | 1929-11-07 | 1934-03-15 | Asea Ab | Bearing for rotating masses, the shaft of which is mounted in two bearings, one of which is fixed and the other is flexible |
| CH246075A (en) * | 1945-11-07 | 1946-12-15 | Gasser Jakob | Winch. |
| US2652292A (en) * | 1950-06-06 | 1953-09-15 | Paper Patents Co | Journal bearing |
| DE1132306B (en) * | 1958-03-26 | 1962-06-28 | Hans Juergen Lutz Dipl Ing | Elevator winch with friction wheel drive |
| FR1349702A (en) * | 1963-03-01 | 1964-01-17 | Winch especially suitable for mounting on a non-rigid support | |
| DE1431136A1 (en) * | 1963-04-04 | 1969-03-20 | Zd Y V I Plzen Narodni Podnik | Method and device for measuring the tension of a rope wound on a rope drum |
| DE1269317B (en) * | 1966-11-12 | 1968-05-30 | Stahl R Fa | Winch, especially for elevators |
| DE1531263A1 (en) * | 1967-08-18 | 1969-12-11 | Schenck Gmbh Carl | Crane trolley for four rope grab |
| DE1806281B2 (en) * | 1968-09-06 | 1972-04-13 | Maschinenfabrik Augsburg-Nürnberg AG, Zweigniederlassung Nürnberg, 8500 Nürnberg | DEVICE FOR MEASURING THE PENDULUM MOVEMENT OF A LOAD HANGING ON A HOIST WITH A HORIZONTALLY MOVABLE MOUNTING POINT |
| US3568468A (en) * | 1969-06-17 | 1971-03-09 | Harnischfeger Corp | Cable drum mounting for a crane |
| DE2031979A1 (en) * | 1970-06-29 | 1972-01-05 | Weser Ag | Device for measuring the tensile forces on winches |
| DE2918763C2 (en) * | 1979-05-09 | 1986-09-11 | Kraftwerk Union AG, 4330 Mülheim | Bearing arrangement for rotors in electrical machines, in particular for the rotors of a turbo generator with a superconducting field winding |
| SE426161B (en) * | 1981-05-18 | 1982-12-13 | Atlas Copco Ab | WINCH |
-
1982
- 1982-02-24 CH CH112982A patent/CH646118A5/en not_active IP Right Cessation
-
1983
- 1983-01-05 ZA ZA8354A patent/ZA8354B/en unknown
- 1983-01-07 HU HU8357A patent/HU187481B/en not_active IP Right Cessation
- 1983-01-20 ES ES519152A patent/ES8401414A1/en not_active Expired
- 1983-01-24 EP EP83100591A patent/EP0087579B1/en not_active Expired
- 1983-01-24 AT AT83100591T patent/ATE18186T1/en not_active IP Right Cessation
- 1983-01-24 DE DE8383100591T patent/DE3362224D1/en not_active Expired
- 1983-01-27 PT PT76152A patent/PT76152B/en not_active IP Right Cessation
- 1983-01-31 CA CA000420556A patent/CA1195261A/en not_active Expired
- 1983-02-10 MA MA19928A patent/MA19710A1/en unknown
- 1983-02-17 FI FI830529A patent/FI72495C/en not_active IP Right Cessation
- 1983-02-23 NO NO830641A patent/NO155389C/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765671A (en) * | 2012-07-19 | 2012-11-07 | 山起重型机械股份公司 | Hoist roller and speed reducer connecting device |
Also Published As
| Publication number | Publication date |
|---|---|
| MA19710A1 (en) | 1983-10-01 |
| FI72495B (en) | 1987-02-27 |
| PT76152A (en) | 1983-02-01 |
| NO155389B (en) | 1986-12-15 |
| ES519152A0 (en) | 1983-12-16 |
| FI830529A0 (en) | 1983-02-17 |
| EP0087579A1 (en) | 1983-09-07 |
| HU187481B (en) | 1986-01-28 |
| NO155389C (en) | 1987-03-25 |
| CH646118A5 (en) | 1984-11-15 |
| PT76152B (en) | 1985-11-12 |
| FI830529L (en) | 1983-08-25 |
| ZA8354B (en) | 1984-03-28 |
| NO830641L (en) | 1983-08-25 |
| DE3362224D1 (en) | 1986-04-03 |
| EP0087579B1 (en) | 1986-02-26 |
| ATE18186T1 (en) | 1986-03-15 |
| FI72495C (en) | 1987-06-08 |
| ES8401414A1 (en) | 1983-12-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |