CA2029422C - Procedure and apparatus for producing elevator load data - Google Patents
Procedure and apparatus for producing elevator load dataInfo
- Publication number
- CA2029422C CA2029422C CA002029422A CA2029422A CA2029422C CA 2029422 C CA2029422 C CA 2029422C CA 002029422 A CA002029422 A CA 002029422A CA 2029422 A CA2029422 A CA 2029422A CA 2029422 C CA2029422 C CA 2029422C
- Authority
- CA
- Canada
- Prior art keywords
- elevator car
- unit
- elevator
- car unit
- detectors
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3476—Load weighing or car passenger counting devices
- B66B1/3484—Load weighing or car passenger counting devices using load cells
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Elevator Control (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Control Of Electric Motors In General (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Polyesters Or Polycarbonates (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Abstract
Procedure and apparatus for producing elevator load data. The procedure employs one or more tension sensing detectors placed on the elevator car unit or on a member carrying the weight of said unit. At least one detector is placed on the elevator car unit in a location where the tension caused by the load is high. Based on the information obtained from the detectors, a car load signal and another load signal, used especially in the start setting of a hoisting motor drive and dependent on the position of the elevator car unit, are produced.
Description
2 ~ 2 2 The present invention relates to a procedure and an apparatus for producing load data in an elevator, said procedure employing one or more tension sensing detectors placed in an elevator car unit or on a member supporting the weight of an elevator car unit.
In conventional elevator load measuring systems, the purpose is to obtain signals dependent on the load of the elevator car. A load measuring instrument of this type, designed for an elevator car using hoisting ropes, is proposed e.g. in Patent Publication FI 75048. In the elevator described in this publication, the bottom of the elevator car rests on isolating elements resting on the horizontal shoulders of angle irons whose vertical shoulders are secured with screws on the bottom frame. Attached above and below each angle iron is a strain gauge. According to the publication mentioned, it is preferable to use four angle irons placed at the four corners of the bottom frame.
One of the drawbacks of the solution proposed in this publication is that the strain gauges are difficult to mount, especially if they should be mounted after elevator installation.
Conventional load measuring systems fitted under the elevator car can not provide start setting data directly. Instead, a separate load-weighing device, e.g. a brake scale is needed for this purpose.
The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a system for generating elevator load data for use in the modernization of elevators.
The procedure of the invention for producing elevator load data is characterized in that at least one detector is placed on the elevator car unit in a location where the tension caused by the load is high, and that, based on the information obtained from the detectors, a car load signal and a car position signal, used especially in the start setting of a hoisting motor drive, dependent on the position of the elevator car unit, are produced.
The apparatus of the present invention can be easily adapted to existing elevators. Compared to a load weighing device placed under the elevator car, the invention provides significant advantages in the modernization of elevators. The elevator car does not need to be lifted for mounting the detectors and therefore no extra space is necessary below the overhead beam of the car frame.
Furthermore, no additional insulating elements and constructional changes under the elevator car are required, as in the case when the load measuring system is placed under the elevator car. Moreover, the apparatus can be used in elevator car-frame systems where no insulation is provided between the elevator car and the car frame.
In the following, the invention is described in detail by the aid of examples with reference to the attached drawings, in which:
Figure 1 illustrates an elevator system provided with a load measuring apparatus according to the present invention;
Figure 2 illustrates a perspective view of the load measuring apparatus of the present invention;
Figure 3 shows a perspective view of a preferred embodiment of an elevator car unit provided with a load measuring apparatus according to the invention;
Figure 4 shows a perspective view of another embodiment of an elevator car unit provided with a load measuring apparatus according to the present invention;
Figure 5 shows a perspective view of yet another embodiment of an elevator car unit provided with a load measuring apparatus according to the present invention;
Figure 6 illustrates the block diagram of the apparatus of the invention;
Figures 7a - 7d illustrate the variation of the outputs of the amplifiers with the position on the car floor;
Figures 8a - 8b show a hydraulic elevator provided with a load measuring apparatus according to the present invention.
The elevator system illustrated in Figure comprises an elevator car unit 1 consisting of an elevator car 2 and a car frame, said unit moving along guide rails in a hoistway (not shown). The car frame consists of overhead beams 3a and 3b, side beams 4 and bottom beams 5a and 5b.
The elevator car unit is moved using hoisting ropes 10 operated by a hoisting motor 6, transmission unit 7, traction sheave 8 and diverting pulley 9 placed in a machine room above the hoistway. The hoisting motor is provided with a control unit. One end of the hoisting ropes is attached to a fixing point 11 located between the overhead beams and the other end of the ropes is attached to a counterweight 12. A car cable 13 is connected to the elevator car unit. In this embodiment a vertical (side) beam 4 secures at its upper end the ends of both overhead beams. The car is comprised inside the car frame.
For measuring the car load by the procedure of the invention, a strain gauge transducer 14 is placed on top of the overhead beam 3a and is connected via a cable 15 to a central unit 16 mounted on top of the elevator car.
The load measuring apparatus illustrated in Figure 2 comprises the strain gauge transducer 14, the connecting cable 15 and an amplifier card 17 placed in a housing 18 provided with a lead-through 19. If d.c. supply is not available and a mains supply voltage for relay outputs is needed, an adapter card 20 is also included in housing 18. The detector 14 may be e.g. a strain gauge transducer as proposed in Patent Publication FI 62904. This transducer, when attached by its ends with screws to an adequate base, senses the tensile and compressive stresses ;~
. ..
of the base in the longitudinal direction of the transducer.
Attached between the ends of the body of the transducer are strain gauges which bend at their fixing points due to the tensile and compressive stresses of the base.
Figure 3 shows an embodiment of an elevator car unit in which the overhead beams are attached to separate vertical beam 2la and 2lb, respectively or the elevator car 2 is mounted in an asymmetrical position relative to the car frame. In this case, two detectors (14 and 22) are used, one on each overhead beam. The detectors are connected to the central unit via cables 15 and 23.
The detectors produce signals indicating the force (load) applied to the hoisting ropes. In addition, it is possible to obtain signals indicating changes in beam tension caused by installation errors or by the guides of the elevator car. This makes it possible to determine the quality of the installation as well as the kinetic friction of the elevator car system.
Figure 4 shows an elevator car unit similar to the unit shown in Fig. 1, with a hoisting rope pulley 24 mounted in the overhead beam. In addition, the unit is provided with balancing means, which is attached to the bottom beam and consists of a beam 25 and a balancing chain 26 or the like. The elevator car is mounted in a symmetrical position relative to the car frame. In this case, beam 25 is provided with a detector 27, connected to the central unit via cable 28. The system is proposed to check the balancing of the elevator system.
Figure 5 shows an elevator car unit similar to that in Figure 3. In this case, the overhead beams are attached to separate vertical beams and/or the car is in an asymmetrical position relative to the car frame. As in the case of Figure 4, the elevator car unit is provided with a rope pulley and the balancing means is attached to the bottom beam. In addition, the unit has a compensation detector 27 providing absolute car position data.
A
Fig. 6 shows a block diagram of the apparatus of the invention. As shown in Fig. 2, the central unit 16 comprises an amplifier card 17. The amplifier is fed by a 24V d.c. voltage Vdc. The amplifier card is connected via conductors to three detectors (detector 1, detector 2 and detector 3) 14, 22 and 27 and has transistor outputs connected to the control panel. The conductors can also be replaced by a bus. If d.c. supply Vdc is not available and potential-free contactors are needed, an adapter card 20 converting the mains voltage Vac into a d.c. voltage is used in connection with the central unit. In addition, the apparatus may have relay outputs R connected to the control panel.
Figure 7a shows the amplified output 01 of a load measuring channel(s). It shows an output LF for a fully loaded elevator car and an output LE for an empty car. The output 01 increases linearly from the lowest floor A to the highest floor Y (horizontal axis) of the elevator car, due to the position dependent load caused by the car cable and the balancing means. The difference between outputs LF and LE represents the load L. In addition, Figure 7a shows a constant output (offset) OS representing the load imposed by the weight of the elevator car unit itself. Figure 7b shows the compensation channel output 02, which is a linearly rising signal BT representing the load caused by the balancing means and the car cable. Figure 7c shows the load signal L, which is obtained by subtracting the offset OS and the weight of the elevator car unit, hoisting ropes and balancing means from the output 01 of Figure 7a. Figure 7d represents the linearly changing start setting data ST with incorrect or missing compensation. The difference between the middle value and the zero level observed at the start represents the compensation error OS'.
Figure 8a illustrates the apparatus of the invention as applied in the case of a hydraulic elevator using a hydraulic lifting cylinder 29 for moving an elevator 2029~2~
car unit 36. The hydraulic system comprises a movable piston 30 inside the cylinder 29, a pressure pipe 31 and a lifting machine 32. The latter consists of a hydraulic pump, a lifting motor and other equipment required for the lifting. The piston is connected to the elevator car unit via an arm 33. A car cable 34 is attached to the bottom of the car unit. On the supporting beam 35 of the lifting cylinder, a detector 14, a central unit 16 and a connecting cable 15 are installed. In the case of Figure 8b, the load measuring apparatus is placed on the arm 33 near the elevator car unit.
It is obvious to a person skilled in the art that different embodiments of the invention are not restricted to the examples described above, but that they may instead be varied within the scope of the following claims. Instead of strain gauge transducers it is possible to use e.g.
piezoelectric or other tension sensing detectors.
In conventional elevator load measuring systems, the purpose is to obtain signals dependent on the load of the elevator car. A load measuring instrument of this type, designed for an elevator car using hoisting ropes, is proposed e.g. in Patent Publication FI 75048. In the elevator described in this publication, the bottom of the elevator car rests on isolating elements resting on the horizontal shoulders of angle irons whose vertical shoulders are secured with screws on the bottom frame. Attached above and below each angle iron is a strain gauge. According to the publication mentioned, it is preferable to use four angle irons placed at the four corners of the bottom frame.
One of the drawbacks of the solution proposed in this publication is that the strain gauges are difficult to mount, especially if they should be mounted after elevator installation.
Conventional load measuring systems fitted under the elevator car can not provide start setting data directly. Instead, a separate load-weighing device, e.g. a brake scale is needed for this purpose.
The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a system for generating elevator load data for use in the modernization of elevators.
The procedure of the invention for producing elevator load data is characterized in that at least one detector is placed on the elevator car unit in a location where the tension caused by the load is high, and that, based on the information obtained from the detectors, a car load signal and a car position signal, used especially in the start setting of a hoisting motor drive, dependent on the position of the elevator car unit, are produced.
The apparatus of the present invention can be easily adapted to existing elevators. Compared to a load weighing device placed under the elevator car, the invention provides significant advantages in the modernization of elevators. The elevator car does not need to be lifted for mounting the detectors and therefore no extra space is necessary below the overhead beam of the car frame.
Furthermore, no additional insulating elements and constructional changes under the elevator car are required, as in the case when the load measuring system is placed under the elevator car. Moreover, the apparatus can be used in elevator car-frame systems where no insulation is provided between the elevator car and the car frame.
In the following, the invention is described in detail by the aid of examples with reference to the attached drawings, in which:
Figure 1 illustrates an elevator system provided with a load measuring apparatus according to the present invention;
Figure 2 illustrates a perspective view of the load measuring apparatus of the present invention;
Figure 3 shows a perspective view of a preferred embodiment of an elevator car unit provided with a load measuring apparatus according to the invention;
Figure 4 shows a perspective view of another embodiment of an elevator car unit provided with a load measuring apparatus according to the present invention;
Figure 5 shows a perspective view of yet another embodiment of an elevator car unit provided with a load measuring apparatus according to the present invention;
Figure 6 illustrates the block diagram of the apparatus of the invention;
Figures 7a - 7d illustrate the variation of the outputs of the amplifiers with the position on the car floor;
Figures 8a - 8b show a hydraulic elevator provided with a load measuring apparatus according to the present invention.
The elevator system illustrated in Figure comprises an elevator car unit 1 consisting of an elevator car 2 and a car frame, said unit moving along guide rails in a hoistway (not shown). The car frame consists of overhead beams 3a and 3b, side beams 4 and bottom beams 5a and 5b.
The elevator car unit is moved using hoisting ropes 10 operated by a hoisting motor 6, transmission unit 7, traction sheave 8 and diverting pulley 9 placed in a machine room above the hoistway. The hoisting motor is provided with a control unit. One end of the hoisting ropes is attached to a fixing point 11 located between the overhead beams and the other end of the ropes is attached to a counterweight 12. A car cable 13 is connected to the elevator car unit. In this embodiment a vertical (side) beam 4 secures at its upper end the ends of both overhead beams. The car is comprised inside the car frame.
For measuring the car load by the procedure of the invention, a strain gauge transducer 14 is placed on top of the overhead beam 3a and is connected via a cable 15 to a central unit 16 mounted on top of the elevator car.
The load measuring apparatus illustrated in Figure 2 comprises the strain gauge transducer 14, the connecting cable 15 and an amplifier card 17 placed in a housing 18 provided with a lead-through 19. If d.c. supply is not available and a mains supply voltage for relay outputs is needed, an adapter card 20 is also included in housing 18. The detector 14 may be e.g. a strain gauge transducer as proposed in Patent Publication FI 62904. This transducer, when attached by its ends with screws to an adequate base, senses the tensile and compressive stresses ;~
. ..
of the base in the longitudinal direction of the transducer.
Attached between the ends of the body of the transducer are strain gauges which bend at their fixing points due to the tensile and compressive stresses of the base.
Figure 3 shows an embodiment of an elevator car unit in which the overhead beams are attached to separate vertical beam 2la and 2lb, respectively or the elevator car 2 is mounted in an asymmetrical position relative to the car frame. In this case, two detectors (14 and 22) are used, one on each overhead beam. The detectors are connected to the central unit via cables 15 and 23.
The detectors produce signals indicating the force (load) applied to the hoisting ropes. In addition, it is possible to obtain signals indicating changes in beam tension caused by installation errors or by the guides of the elevator car. This makes it possible to determine the quality of the installation as well as the kinetic friction of the elevator car system.
Figure 4 shows an elevator car unit similar to the unit shown in Fig. 1, with a hoisting rope pulley 24 mounted in the overhead beam. In addition, the unit is provided with balancing means, which is attached to the bottom beam and consists of a beam 25 and a balancing chain 26 or the like. The elevator car is mounted in a symmetrical position relative to the car frame. In this case, beam 25 is provided with a detector 27, connected to the central unit via cable 28. The system is proposed to check the balancing of the elevator system.
Figure 5 shows an elevator car unit similar to that in Figure 3. In this case, the overhead beams are attached to separate vertical beams and/or the car is in an asymmetrical position relative to the car frame. As in the case of Figure 4, the elevator car unit is provided with a rope pulley and the balancing means is attached to the bottom beam. In addition, the unit has a compensation detector 27 providing absolute car position data.
A
Fig. 6 shows a block diagram of the apparatus of the invention. As shown in Fig. 2, the central unit 16 comprises an amplifier card 17. The amplifier is fed by a 24V d.c. voltage Vdc. The amplifier card is connected via conductors to three detectors (detector 1, detector 2 and detector 3) 14, 22 and 27 and has transistor outputs connected to the control panel. The conductors can also be replaced by a bus. If d.c. supply Vdc is not available and potential-free contactors are needed, an adapter card 20 converting the mains voltage Vac into a d.c. voltage is used in connection with the central unit. In addition, the apparatus may have relay outputs R connected to the control panel.
Figure 7a shows the amplified output 01 of a load measuring channel(s). It shows an output LF for a fully loaded elevator car and an output LE for an empty car. The output 01 increases linearly from the lowest floor A to the highest floor Y (horizontal axis) of the elevator car, due to the position dependent load caused by the car cable and the balancing means. The difference between outputs LF and LE represents the load L. In addition, Figure 7a shows a constant output (offset) OS representing the load imposed by the weight of the elevator car unit itself. Figure 7b shows the compensation channel output 02, which is a linearly rising signal BT representing the load caused by the balancing means and the car cable. Figure 7c shows the load signal L, which is obtained by subtracting the offset OS and the weight of the elevator car unit, hoisting ropes and balancing means from the output 01 of Figure 7a. Figure 7d represents the linearly changing start setting data ST with incorrect or missing compensation. The difference between the middle value and the zero level observed at the start represents the compensation error OS'.
Figure 8a illustrates the apparatus of the invention as applied in the case of a hydraulic elevator using a hydraulic lifting cylinder 29 for moving an elevator 2029~2~
car unit 36. The hydraulic system comprises a movable piston 30 inside the cylinder 29, a pressure pipe 31 and a lifting machine 32. The latter consists of a hydraulic pump, a lifting motor and other equipment required for the lifting. The piston is connected to the elevator car unit via an arm 33. A car cable 34 is attached to the bottom of the car unit. On the supporting beam 35 of the lifting cylinder, a detector 14, a central unit 16 and a connecting cable 15 are installed. In the case of Figure 8b, the load measuring apparatus is placed on the arm 33 near the elevator car unit.
It is obvious to a person skilled in the art that different embodiments of the invention are not restricted to the examples described above, but that they may instead be varied within the scope of the following claims. Instead of strain gauge transducers it is possible to use e.g.
piezoelectric or other tension sensing detectors.
Claims (9)
1. A method for producing load data of an elevator, comprising the steps of:
detecting load data of the elevator by using tension-sensing detectors placed on an elevator car unit or on a member carrying the weight of the unit, wherein at least one of the detectors is placed on the elevator car unit in a location where the tension caused by the load is high;
producing a car load signal based on information from the detectors;
producing a further load signal based on the information from the detectors, the further load signal being dependent on the position of the elevator car unit;
and, using the further load signal in start-setting of a hoisting motor drive.
detecting load data of the elevator by using tension-sensing detectors placed on an elevator car unit or on a member carrying the weight of the unit, wherein at least one of the detectors is placed on the elevator car unit in a location where the tension caused by the load is high;
producing a car load signal based on information from the detectors;
producing a further load signal based on the information from the detectors, the further load signal being dependent on the position of the elevator car unit;
and, using the further load signal in start-setting of a hoisting motor drive.
2. A method according to claim 1, wherein the at least one detector is placed at the same height with the fixing point of a lifting member or members or at least close to it.
3. A method according to claim 1 or 2, wherein at least one compensation detector is placed on a balancing means comprised in the elevator car unit.
4. A method according to claim 3, wherein the detector placed on the balancing means is used to produce a signal representing the position of the elevator car unit.
5. An apparatus for applying the method of claim 1, comprising:
one or more tension-sensing detectors placed on the elevator car unit or on the member carrying the weight of the unit; and, an amplifier unit placed on the elevator car unit or on the member carrying the weight of the unit;
wherein at least one of the detectors is placed on the elevator car unit in a location where the tension caused by the load is high, wherein based on information from the detectors a car load signal is produced, and wherein based on the information from the detectors a further load signal is produced which is dependent on the position of the elevator car unit, the further load signal being used in start-setting of a hoisting motor drive.
one or more tension-sensing detectors placed on the elevator car unit or on the member carrying the weight of the unit; and, an amplifier unit placed on the elevator car unit or on the member carrying the weight of the unit;
wherein at least one of the detectors is placed on the elevator car unit in a location where the tension caused by the load is high, wherein based on information from the detectors a car load signal is produced, and wherein based on the information from the detectors a further load signal is produced which is dependent on the position of the elevator car unit, the further load signal being used in start-setting of a hoisting motor drive.
6. An apparatus according to claim 5, further comprising at least one compensation detector placed on a balancing means comprised in the elevator car unit, said compensating detector serving to produce a signal indicating the position of the elevator car unit.
7. An apparatus according to claim 5 or 6, for producing elevator load data in the case of an elevator provided with hoisting ropes, wherein at least one detector is placed on a structure in the upper part of the elevator car unit.
8. An apparatus according to claim 5 or 6, for producing elevator load data for use in a hydraulic elevator, wherein at least one detector is placed on a supporting member serving to move the elevator car unit, or on a beam supporting the elevator car unit.
9. An apparatus according to any one of claims 5 to 8, wherein each of the tension-sensing detectors is independently connectable to the amplifier unit, and is attached to the elevator car unit or the member carrying the weight of the unit by mechanical means.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI895376 | 1989-11-10 | ||
| FI895376A FI84105C (en) | 1989-11-10 | 1989-11-10 | Method and apparatus for generating load data in an elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2029422A1 CA2029422A1 (en) | 1991-05-11 |
| CA2029422C true CA2029422C (en) | 1998-12-29 |
Family
ID=8529331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002029422A Expired - Fee Related CA2029422C (en) | 1989-11-10 | 1990-11-07 | Procedure and apparatus for producing elevator load data |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0427075B1 (en) |
| JP (1) | JP2540665B2 (en) |
| AT (1) | ATE117969T1 (en) |
| AU (1) | AU637843B2 (en) |
| BR (1) | BR9005697A (en) |
| CA (1) | CA2029422C (en) |
| DE (1) | DE69016581T2 (en) |
| FI (1) | FI84105C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4119253A1 (en) * | 1990-06-11 | 1991-12-12 | Mitsubishi Electric Corp | Passenger lift control device with cabin load compensation - uses weighing device at base of lift cabin supplying signal added to torque command signal for motor |
| FI107249B (en) * | 1996-12-20 | 2001-06-29 | Kone Corp | Method and apparatus for measuring the load of an elevator |
| CN1318287C (en) * | 2002-03-06 | 2007-05-30 | 三菱电机株式会社 | Emergency stop testing device for elevator |
| WO2012031961A1 (en) | 2010-09-09 | 2012-03-15 | Inventio Ag | Load measuring device for an elevator installation |
| CN117203143A (en) * | 2021-04-27 | 2023-12-08 | 通力股份公司 | Bearing part, elevator and method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2411023A (en) * | 1945-04-28 | 1946-11-12 | Otis Elevator Co | Load weighing device |
| CH425134A (en) * | 1963-11-21 | 1966-11-30 | Schweiz Wagons Aufzuegefab | Device for generating a signal for elevator controls that is dependent on the load on an elevator car |
| JPS5344737B2 (en) * | 1972-12-01 | 1978-12-01 | ||
| GB2055207B (en) * | 1979-05-25 | 1983-11-16 | Tinsley Telcon Ltd | Device for signalling load excess |
| IT1233979B (en) * | 1989-03-08 | 1992-04-22 | Biffi Spa | SUBMARINE VALVE ACTUATOR |
-
1989
- 1989-11-10 FI FI895376A patent/FI84105C/en not_active IP Right Cessation
-
1990
- 1990-10-27 AT AT90120654T patent/ATE117969T1/en not_active IP Right Cessation
- 1990-10-27 EP EP90120654A patent/EP0427075B1/en not_active Expired - Lifetime
- 1990-10-27 DE DE69016581T patent/DE69016581T2/en not_active Expired - Fee Related
- 1990-11-06 AU AU65816/90A patent/AU637843B2/en not_active Ceased
- 1990-11-07 CA CA002029422A patent/CA2029422C/en not_active Expired - Fee Related
- 1990-11-09 BR BR909005697A patent/BR9005697A/en not_active IP Right Cessation
- 1990-11-09 JP JP2302796A patent/JP2540665B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FI84105C (en) | 1991-10-10 |
| FI84105B (en) | 1991-06-28 |
| EP0427075A2 (en) | 1991-05-15 |
| BR9005697A (en) | 1991-09-17 |
| DE69016581T2 (en) | 1995-06-14 |
| DE69016581D1 (en) | 1995-03-16 |
| ATE117969T1 (en) | 1995-02-15 |
| JP2540665B2 (en) | 1996-10-09 |
| AU637843B2 (en) | 1993-06-10 |
| JPH03192081A (en) | 1991-08-21 |
| FI895376A0 (en) | 1989-11-10 |
| EP0427075B1 (en) | 1995-02-01 |
| EP0427075A3 (en) | 1991-11-13 |
| CA2029422A1 (en) | 1991-05-11 |
| AU6581690A (en) | 1991-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |