WO1999038628A1 - Method for producing a curved metal sheet strip, and said curved metal sheet strip - Google Patents

Method for producing a curved metal sheet strip, and said curved metal sheet strip Download PDF

Info

Publication number
WO1999038628A1
WO1999038628A1 PCT/CA1999/000058 CA9900058W WO9938628A1 WO 1999038628 A1 WO1999038628 A1 WO 1999038628A1 CA 9900058 W CA9900058 W CA 9900058W WO 9938628 A1 WO9938628 A1 WO 9938628A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal sheet
strip
teeth
curved metal
longitudinal sides
Prior art date
Application number
PCT/CA1999/000058
Other languages
French (fr)
Other versions
WO1999038628A9 (en
Inventor
Alain Forcione
Missak Ibishian
Germain Harbec
Original Assignee
Hydro-Quebec
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 Hydro-Quebec filed Critical Hydro-Quebec
Priority to JP2000529910A priority Critical patent/JP2002501828A/en
Priority to EP99901546A priority patent/EP1051270A1/en
Priority to AU21463/99A priority patent/AU2146399A/en
Priority to KR1020007008092A priority patent/KR20010034355A/en
Priority to CA002313778A priority patent/CA2313778A1/en
Publication of WO1999038628A1 publication Critical patent/WO1999038628A1/en
Publication of WO1999038628A9 publication Critical patent/WO1999038628A9/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/16—Making other particular articles rings, e.g. barrel hoops
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • H02K15/026—Wound cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/26—Rotor cores with slots for windings

Definitions

  • a rotor turns concentric relative to a fixed stator.
  • stator In general the stator is external to the rotor.
  • the rotor In the case of a motor wheel or a ceiling suspended " fan, the rotor is external to the stator.
  • the stator or rotor is provided with peripheral teeth around which windings are wound.
  • the stator or rotor frame is made of circular shaped metallic sheets stacked together. To produce a frame, circular shapes are usually cut out from metal sheets. With this production method, each time a circular shape is cut out from a metal sheet, the remaining metal material of the metal sheet is wasted. This is not a problem when cheap material is used, but when the sheet is made of an expensive metal material, the waste of material is a major drawback because of the cost of the wasted material.
  • a method for producing a curved metal sheet strip for manufacturing a stator or rotor motor frame comprising the steps of : a) cutting an elongated strip from a metal sheet, the strip having two longitudinal sides and extending in a plane, the strip having an elongated band section provided with a series of regularly spaced apart teeth along one of the longitudinal sides; and b) incurvating each portion of the band section joining two adjacent teeth in a direction perpendicular to the plane in such a manner that each portion has an increasing radius from one of the longitudinal sides to the other longitudinal side, thereby providing the curved metal sheet strip.
  • a curved metal sheet strip suitable for manufacturing a stator or rotor frame, the strip having two longitudinal sides and extending in a plane, the strip having an elongated band section provided with a series of regularly spaced apart teeth along one of the longitudinal sides, each portion of the band section joining two adjacent teeth being incurvated in a direction perpendicular to the plane in such manner that each portion has an increasing radius from one of the longitudinal sides to the other longitudinal side, thereby providing the curved metal sheet strip.
  • Figure 1 is a view from above of a metal sheet from which a circular shape has been cut out according to prior art, showing the proportion of wasted metal material in crossed hatched pattern.
  • Figure 3 is a view from above of a two strips cut out from a metal sheet according to another embodiment of the present invention.
  • Figure 4 is a view from above of several strips cut out from a metal sheet according to an embodiment of the present invention.
  • Figure 8 is a perspective view of a curved metal sheet strip having a circular shape according to the present invention.
  • the first step of the method consists in cutting an elongated, substantially linear strip (8) from a metal sheet (9) .
  • the strip (8) has two longitudinal sides and extends in a plane.
  • the strip has an elongated band section (13) provided with a series of regularly spaced apart teeth (14) along one of the longitudinal sides.
  • a single elongated strip (8) is cut from the metal sheet (9) .
  • Several other geometrical patterns can be considered to cut the metal strips from metal sheets, examples of which are presented on figures 3, 4, and 5.
  • the material between the teeth (14) is cut away and wasted.
  • This technique creates a certain amount of wasted material but still considerably less than in the prior art technique.
  • the main advantage of this embodiment is that it allows any desired geometry for the teeth pattern.
  • each of the teeth (14) has an enlarging free end.
  • Each portion of the band section joining two adjacent teeth has an edge (10) that is concave.
  • a curved metal sheet strip (8) suitable for manufacturing a stator or rotor frame.
  • a segment of the strip (8) is shown.
  • Several segments can be added to form a cylindrical helix shape where each layer of the cylindrical helix shape are stacked and held together to form a stator or rotor frame.
  • the strip (8) extends in a plane.
  • the strip (8) has an elongated band section (13) provided with a series of regularly spaced apart teeth (14) along one of its longitudinal sides.
  • Each portion of the band section joining two adjacent teeth is incurvated in a direction perpendicular to the plane in such manner that each portion has an increasing radius from the first longitudinal side to the second longitudinal side, thereby providing the curved metal sheet strip (8) as shown in this figure 6 and in figures 8 to 10.
  • the length of the strip (8) and the incurvating pattern may be chosen so the strip forms a circular shaped metal sheet strip.
  • the length of the strips (8) and the incurvating pattern can also be adjusted to result into a few large arc sections to be assembled together to form the desired circular shape, or into a cylindrical helix shape of more than one turn stacked up one above the other.
  • Such cylindrical helix shapes are illustrated on figures 9 and 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The method is for producing a curved metal sheet strip for manufacturing a stator or rotor motor frame. The method comprises the steps of (a) cutting an elongated, substantially linear strip (8) from a metal sheet (a), the strip having two longitudinal sides and extending in a plane, the strip having an elongated band section (13) provided with a series of regularly spaced apart teeth (14) along one of the longitudinal sides; and (b) incurvating each portion of the band section joining two adjacent teeth in a direction perpendicular to the plane in such a manner that each portion has an increasing radius from one of the longitudinal sides to the other longitudinal side, thereby providing the curved metal sheet strip. According to the present invention, there is also provided a curved metal sheet strip.

Description

METHOD FOR PRODUCING A CURVED METAL SHEET STRIP, AND SAID
CURVED METAL SHEET STRIP
BACKGROUND OF THE INVENTION:
In electric motors, a rotor turns concentric relative to a fixed stator. In general the stator is external to the rotor. In the case of a motor wheel or a ceiling suspended" fan, the rotor is external to the stator.
The stator or rotor is provided with peripheral teeth around which windings are wound. The stator or rotor frame is made of circular shaped metallic sheets stacked together. To produce a frame, circular shapes are usually cut out from metal sheets. With this production method, each time a circular shape is cut out from a metal sheet, the remaining metal material of the metal sheet is wasted. This is not a problem when cheap material is used, but when the sheet is made of an expensive metal material, the waste of material is a major drawback because of the cost of the wasted material.
To overcome the above described drawback, a method for producing a curved metal sheet strip with minimal waste of the metal sheet material is proposed.
According to the present invention, there is provided a method for producing a curved metal sheet strip for manufacturing a stator or rotor motor frame, comprising the steps of : a) cutting an elongated strip from a metal sheet, the strip having two longitudinal sides and extending in a plane, the strip having an elongated band section provided with a series of regularly spaced apart teeth along one of the longitudinal sides; and b) incurvating each portion of the band section joining two adjacent teeth in a direction perpendicular to the plane in such a manner that each portion has an increasing radius from one of the longitudinal sides to the other longitudinal side, thereby providing the curved metal sheet strip.
According to the present invention, there is also provided a curved metal sheet strip suitable for manufacturing a stator or rotor frame, the strip having two longitudinal sides and extending in a plane, the strip having an elongated band section provided with a series of regularly spaced apart teeth along one of the longitudinal sides, each portion of the band section joining two adjacent teeth being incurvated in a direction perpendicular to the plane in such manner that each portion has an increasing radius from one of the longitudinal sides to the other longitudinal side, thereby providing the curved metal sheet strip.
BRIEF DESCRIPTION OF THE DRAWINGS: Figure 1 is a view from above of a metal sheet from which a circular shape has been cut out according to prior art, showing the proportion of wasted metal material in crossed hatched pattern.
Figure 2 is a view from above of a single strip cut out from a metal sheet according to an embodiment of the present invention.
Figure 3 is a view from above of a two strips cut out from a metal sheet according to another embodiment of the present invention. Figure 4 is a view from above of several strips cut out from a metal sheet according to an embodiment of the present invention.
Figure 5 is a view from above of a two strips cut out from a metal sheet according to further embodiment of the present invention.
Figure 6 is a partial perspective view from above of a segment of a cut out strip after it has been processed according to the present invention. Figure 7 is a view across section 7-7 of figure 6.
Figure 8 is a perspective view of a curved metal sheet strip having a circular shape according to the present invention.
Figure 9 and 10 are perspective views of curved metal sheet strips having a cylindrical helix shape according to the present invention.
DESCRIPTION OF THE DRAWINGS:
Figure 1 illustrates the metal sheet (6) after a circular shape (7) has been cut out. The cross hatched pattern indicates the remaining parts of the metal sheet that is wasted in the process. The wasted material can constitute a very large percentage of the metal material from the original sheet. The present invention relates to a method for producing a curved metal sheet strip for manufacturing a stator or rotor frame that avoids undue waste of metal material .
Referring now to figure 2, the first step of the method is shown. It consists in cutting an elongated, substantially linear strip (8) from a metal sheet (9) . The strip (8) has two longitudinal sides and extends in a plane. The strip has an elongated band section (13) provided with a series of regularly spaced apart teeth (14) along one of the longitudinal sides. A single elongated strip (8) is cut from the metal sheet (9) . Several other geometrical patterns can be considered to cut the metal strips from metal sheets, examples of which are presented on figures 3, 4, and 5.
Referring again to figure 2, the material between the teeth (14) is cut away and wasted. This technique creates a certain amount of wasted material but still considerably less than in the prior art technique. The main advantage of this embodiment is that it allows any desired geometry for the teeth pattern.
Referring now to figure 3, in an alternative embodiment two metal strips (8) having their toothless longitudinal sides disposed side by side are cut out of a single sheet (9) . This method has the same advantages and drawbacks of the one shown in figure 2, but has in addition the advantage of being time-saving and less costly. Each of the teeth (14) has an enlarging free end. Each portion of the band section joining two adjacent teeth has an edge (10) that is concave.
A further embodiment can be seen on figure 4. In this embodiment, the teeth pattern is cut out of a rectangular metal sheet (9) in such a manner as to obtain several metal strips (8) out of a single sheet (9) without any waste of material . This method is harder to implement but minimises to the extreme the amount of wasted material. The strips (8) are grouped by pair. Each pair of strips have their longitudinal sides with teeth (14) disposed side by side so that the metal portions that are cut out to form the teeth (14) of one strip of the pair are used to form the teeth (14) of the other strip of the pair. This embodiment however imposes for the teeth (14) and the sections between the teeth to be of the same size.
A way to avoid this restriction is shown in figure 5, where a small quantity of material is cut away from the sides of the teeth (14) to reduce their width so that the teeth
(14) are narrower than the portion of the band section joining two adjacent teeth.
Referring now to figures 6 and 7, there is shown the result of the second step of the method which consists in incurvating each portion of the band section (13) joining two adjacent teeth (14) in a direction perpendicular to the plane in such a manner that each portion has an increasing radius from one of the longitudinal sides to the other longitudinal side, thereby providing the curved metal sheet strip. A variation can be imagined where the incurvating is done to produce a curved strip with teeth (14) projecting inward.
Referring more specifically to figure 6, There is shown a curved metal sheet strip (8) suitable for manufacturing a stator or rotor frame. Of course in this figure 6, only a segment of the strip (8) is shown. Several segments can be added to form a cylindrical helix shape where each layer of the cylindrical helix shape are stacked and held together to form a stator or rotor frame. The strip (8) extends in a plane. The strip (8) has an elongated band section (13) provided with a series of regularly spaced apart teeth (14) along one of its longitudinal sides. Each portion of the band section joining two adjacent teeth is incurvated in a direction perpendicular to the plane in such manner that each portion has an increasing radius from the first longitudinal side to the second longitudinal side, thereby providing the curved metal sheet strip (8) as shown in this figure 6 and in figures 8 to 10.
Referring now to figure 8, the length of the strip (8) and the incurvating pattern may be chosen so the strip forms a circular shaped metal sheet strip. The length of the strips (8) and the incurvating pattern can also be adjusted to result into a few large arc sections to be assembled together to form the desired circular shape, or into a cylindrical helix shape of more than one turn stacked up one above the other. Such cylindrical helix shapes are illustrated on figures 9 and 10.

Claims

CLAIMS :
1. Method for producing a curved metal sheet strip for manufacturing a stator or rotor motor frame, comprising the steps of : a) cutting an elongated strip from a metal sheet, the strip having two longitudinal sides and extending in a plane, the strip having an elongated band section provided with a series of regularly spaced apart teeth along one of the longitudinal sides; and b) incurvating each portion of the band section joining two adjacent teeth in a direction perpendicular to the plane in such a manner that each portion has an increasing radius from one of the longitudinal sides to the other longitudinal side, thereby providing the curved metal sheet strip.
2. Method according to claim 1, wherein each of the teeth has an enlarging free end, and each portion of the band section joining two adjacent teeth has an edge that is concave .
3. Method according to claim 1, wherein a single elongated strip is cut from the metal sheet .
4. Method according to claim 1, wherein: in step (a) , two elongated strips that have their longitudinal sides that are without teeth, disposed side by side are cut from the metal sheet; and step (b) is executed for each of the elongated strips of step (a) .
5. Method according to claim 1, wherein: in step (a) , several elongated strips are cut from the metal sheet, the strips are grouped by pair, each pair of strips have their longitudinal sides with the teeth, disposed side by side so that the metal portions that are cut out to form the teeth of one strip of the pair are used to form the" teeth of the other strip of the pair; and step (b) is executed for each of the elongated strips of step (a) .
6. Method according to claim 5, further comprising a step of cutting away metal material from the teeth to reduce their width so that the teeth are narrower than the portion of the band section joining two adjacent teeth.
7. Method according to claim 1, wherein the curved metal sheet strip has predetermined length and curved shape to form a circle.
8. Method according to claim 1, wherein the curved metal sheet strip has predetermined length and curved shape to form a cylindrical helix.
9. A curved metal sheet strip suitable for manufacturing a stator or rotor frame, the strip having two longitudinal sides and extending in a plane, the strip having an elongated band section provided with a series of regularly spaced apart teeth along one of the longitudinal sides, each portion of the band section joining two adjacent teeth being incurvated in a direction perpendicular to the plane in such manner that each portion has an increasing radius from one of first longitudinal sides to the other longitudinal side, thereby providing the curved metal sheet strip.
10. Curved metal sheet strip according to claim 9, wherein each of the teeth has an enlarging free end, and each portion of the band section joining two adjacent teeth has an edge that is concave.
11. Curved metal sheet strip according to claim 9, wherein the teeth are narrower than the portion of the band section joining two adjacent teeth.
12. Curved metal sheet strip according to claim 9, having predetermined length and curved shape to form a circle.
13. Curved metal sheet strip according to claim 9, having predetermined length and curved shape to form a cylindrical helix.
PCT/CA1999/000058 1998-01-28 1999-01-25 Method for producing a curved metal sheet strip, and said curved metal sheet strip WO1999038628A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2000529910A JP2002501828A (en) 1998-01-28 1999-01-25 Method of manufacturing curved metal sheet strip and curved metal sheet strip
EP99901546A EP1051270A1 (en) 1998-01-28 1999-01-25 Method for producing a curved metal sheet strip, and said curved metal sheet strip
AU21463/99A AU2146399A (en) 1998-01-28 1999-01-25 Method for producing a curved metal sheet strip, and said curved metal sheet strip
KR1020007008092A KR20010034355A (en) 1998-01-28 1999-01-25 Method for Producing a Curved Metal Sheet Strip, and Said Curved Metal Sheet Strip
CA002313778A CA2313778A1 (en) 1998-01-28 1999-01-25 Method for producing a curved metal sheet strip, and said curved metal sheet strip

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA002225097A CA2225097A1 (en) 1998-01-28 1998-01-28 Method for producing a curved metal sheet body, and said curved metal sheet body
CA2,225,097 1998-01-28

Publications (2)

Publication Number Publication Date
WO1999038628A1 true WO1999038628A1 (en) 1999-08-05
WO1999038628A9 WO1999038628A9 (en) 1999-10-14

Family

ID=4161911

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1999/000058 WO1999038628A1 (en) 1998-01-28 1999-01-25 Method for producing a curved metal sheet strip, and said curved metal sheet strip

Country Status (6)

Country Link
EP (1) EP1051270A1 (en)
JP (1) JP2002501828A (en)
KR (1) KR20010034355A (en)
AU (1) AU2146399A (en)
CA (1) CA2225097A1 (en)
WO (1) WO1999038628A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2556905A3 (en) * 2011-08-12 2013-08-21 Otto Bihler Handels-Beteiligungs-GmbH Method and device for the manufacture of ring-shaped coupling lamella with cogging

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE530888C (en) * 1929-12-17 1931-08-01 Richard Thomas Hosking Method of manufacturing toothed lock washers
DE749642C (en) * 1938-10-28 1944-11-28 Device for the production of sheet metal rings
DE836636C (en) * 1948-10-02 1952-04-15 Ernst Jordan Process for the production of resilient screw locking devices with fan-shaped teeth pointing towards the ring opening
DE2159194A1 (en) * 1971-11-30 1973-06-07 Zahnradfabrik Friedrichshafen Making clutch washers - by bending flat plate into rings and mechanically joining ends
US4010831A (en) * 1975-11-21 1977-03-08 General Motors Corporation Transmission friction plate and device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE530888C (en) * 1929-12-17 1931-08-01 Richard Thomas Hosking Method of manufacturing toothed lock washers
DE749642C (en) * 1938-10-28 1944-11-28 Device for the production of sheet metal rings
DE836636C (en) * 1948-10-02 1952-04-15 Ernst Jordan Process for the production of resilient screw locking devices with fan-shaped teeth pointing towards the ring opening
DE2159194A1 (en) * 1971-11-30 1973-06-07 Zahnradfabrik Friedrichshafen Making clutch washers - by bending flat plate into rings and mechanically joining ends
US4010831A (en) * 1975-11-21 1977-03-08 General Motors Corporation Transmission friction plate and device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2556905A3 (en) * 2011-08-12 2013-08-21 Otto Bihler Handels-Beteiligungs-GmbH Method and device for the manufacture of ring-shaped coupling lamella with cogging

Also Published As

Publication number Publication date
WO1999038628A9 (en) 1999-10-14
KR20010034355A (en) 2001-04-25
AU2146399A (en) 1999-08-16
CA2225097A1 (en) 1999-07-28
EP1051270A1 (en) 2000-11-15
JP2002501828A (en) 2002-01-22

Similar Documents

Publication Publication Date Title
EP0727867B1 (en) Coil-forming wire material and method of manufacturing such material
US4365180A (en) Strip wound dynamoelectric machine core
EP1411618A3 (en) Rotary motor and production method thereof, and laminated core and production method thereof
US6630766B1 (en) Strip for producing a ring-shaped electromagnetic element for an electric motor
US4206621A (en) Method of making a wound armature core structure
US5619086A (en) Twin bobbin C-frame motors and methods for making same
EP0096415B1 (en) Flat coil and method of manufacture thereof
JPH09308143A (en) Material of core of rotary machine and manufacture of the core
EP0053485B1 (en) Dc permanent magnet motors
CA1183568A (en) Laminated core for electrical apparatus
JP2006014530A (en) Coil and its manufacturing method
JPS61240832A (en) Armature for rotary electric machine
JP2000152566A (en) Commutator, motor equipped with its commutator, and commutator piece, and formation method for commutator piece
JPS5915459B2 (en) electromechanical magnetic circuit
JP5144238B2 (en) Manufacturing method of laminated core and strip-shaped core
WO1999038628A1 (en) Method for producing a curved metal sheet strip, and said curved metal sheet strip
JPS5992746A (en) Commuttor for electric machine
JPS58133148A (en) Cutting method for motor core
CA2313778A1 (en) Method for producing a curved metal sheet strip, and said curved metal sheet strip
JPH0992561A (en) Helical core for rotating machine and manufacture thereof
GB2030896A (en) Method of making a laminated armature core
JP2001178051A (en) Concentrated winding coil and method for manufacturing and motor
JP2006166498A (en) Manufacturing method of laminated rotor iron core
JPH0684658A (en) Wound core
JP2002095226A (en) Manufacturing method of dynamoelectric machine

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: C2

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: C2

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

COP Corrected version of pamphlet

Free format text: PAGES 2/9-3/9, DRAWINGS, ADDED

ENP Entry into the national phase

Ref document number: 2313778

Country of ref document: CA

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 09582089

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 1999901546

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 1020007008092

Country of ref document: KR

WWP Wipo information: published in national office

Ref document number: 1999901546

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWP Wipo information: published in national office

Ref document number: 1020007008092

Country of ref document: KR

WWR Wipo information: refused in national office

Ref document number: 1999901546

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1999901546

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1020007008092

Country of ref document: KR