WO1998009782A1 - Remote constant surface speed control - Google Patents

Remote constant surface speed control Download PDF

Info

Publication number
WO1998009782A1
WO1998009782A1 PCT/AU1997/000574 AU9700574W WO9809782A1 WO 1998009782 A1 WO1998009782 A1 WO 1998009782A1 AU 9700574 W AU9700574 W AU 9700574W WO 9809782 A1 WO9809782 A1 WO 9809782A1
Authority
WO
WIPO (PCT)
Prior art keywords
speed control
lathe
surface speed
remote
headstock
Prior art date
Application number
PCT/AU1997/000574
Other languages
French (fr)
Inventor
Robert John Caddaye
Marilyn Jeanette Caddaye
Original Assignee
Robert John Caddaye
Marilyn Jeanette Caddaye
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 Robert John Caddaye, Marilyn Jeanette Caddaye filed Critical Robert John Caddaye
Priority to AU40045/97A priority Critical patent/AU4004597A/en
Publication of WO1998009782A1 publication Critical patent/WO1998009782A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
    • B23Q5/58—Safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/06—Safety devices for circular cutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
    • B23Q15/007—Automatic control or regulation of feed movement, cutting velocity or position of tool or work while the tool acts upon the workpiece
    • B23Q15/08—Control or regulation of cutting velocity
    • B23Q15/10—Control or regulation of cutting velocity to maintain constant cutting velocity between tool and workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
    • B23Q5/043—Accessories for spindle drives
    • B23Q5/048—Speed-changing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
    • B23Q5/10—Driving main working members rotary shafts, e.g. working-spindles driven essentially by electrical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C7/00—Wood-turning machines; Equipment therefor
    • B27C7/02—Lathes for hand turning
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/409—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by using manual data input [MDI] or by using control panel, e.g. controlling functions with the panel; characterised by control panel details or by setting parameters

Definitions

  • This invention relates to a remote constant surface speed control and in particular, but not exclusively so, to a remote speed control for a wood turning lathe.
  • the drive to the headstock is by belt from an overhead driven shaft and pulley to a number of pulleys of varying diameters at the headstock of the lathe.
  • this type of drive it is necessary for the operator during a cutting process across a workpiece through varying diameters, to move the chisel away from the workpiece and change the belt to another pulley giving the required new speed and then start cutting operations again.
  • the present invention provides in one aspec :-
  • a remote constant surface speed control mechanism for a wood turning lathe wherein variations in surface speed of a workpiece are controlled by electronic/electrical means accessible to the operator during cutting operations;
  • a remote surface speed control for the headstock drive spindle of a wood turning lathe comprising manually operable electronic/electrical control means incorporated in the handle socket of a chisel or the like, hand controlled working tool, which socket locates a UHF transmitter adapted for finger control of the lathe headstock spindle speeds through a UHF received speed control potentiometer connected to the headstock spindle drive.
  • the electronic/electrical control means may comprise a UHF transmitter having hand or finger operating means and a receiver and control unit which operates a speed control potentiometer to control the headstock drive spindle speed via an electronic inverter drive system.
  • Figure 1 is a perspective view of part of a wood turning lathe
  • Figure 2 is a perspective view of the use of a cutting chisel on the tool rest of the lathe;
  • Figure 3 is a perspective view of a control socket attachable on the chisel handle.
  • Figure 4 is a perspective view of a bowl produced according to the present invention.
  • Figure 1 illustrates in part the lower section of a wood turning lathe 5 having pedestal members 6 and 7, the latter supporting the lathe bed 8, pedestal 6 also locating and supporting electric drive motor 9, headstock (not shown) and drive gear to the headstock spindle.
  • control box 10 housing a remote control UHF receiver (2 channel), manual/motorised speed control potentiometer, amplifier and relays for fast/slow control of the headstock spindle.
  • the finger controlled rotary stepped button 11 controls the potentiometer and buttons 12 and 13 are stop/start buttons for the speed control. It will be noted that the remote speed control can be overridden by manual control if required.
  • Handgrip 14 houses a UHF (2 channel) transmitter with control buttons 16 and 17 for fast and slow operation of the headstock spindle.
  • This control handgrip can be operated by the wood turner whilst cutting the workpiece 18 secured to the headstock with chisel 19 supported on tool rest 20.
  • FIG. 3 illustrates the removable handgrip 14 attachable over the chisel handle 15 and Figure 4 illustrates a finished bowl product 21 illustrating the necessity of correct rotational cutting speeds throughout the diameter of the bowl to bring out the end and side grain in the finished product.
  • the present invention provides a means of controlling surface speed of a workpiece, wherein in the case of a bowl of 500mm outside diameter, it is necessary for optimum results to have available several speed changes during the cutting operation of the lathe.
  • the present invention allows the operator to change speed as necessary by merely pressing one of the buttons on handgrip 14 or on the control box 10 on pedestal 7 to either increase or decrease speed of the headstock spindle in infinite increments throughout the entire speed range of the lathe.
  • the operator has complete control of surface speed and cutting conditions without removing the cutting tool from the work surface or stopping the lathe.
  • This allows for more efficient work practice, increased safety through absolute control and superior surface finish as optimum cutting speeds can be maintained across extreme diameter workpiece variations.
  • the present invention is eminently suitable for use with the lathe the subject of my Application No. PCT/AU96/00090.
  • control mechanism of the present invention may be applied to large cranes controlled by D.C. motors which are expensive to maintain, also their control gear, by replacing with less expensive A.C. motors having a longer maintenance period and having a ground located operator to control level of the load being lifted, by radio which control gear would be relatively less expensive to maintain.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Turning (AREA)

Abstract

This invention relates to a remote constant surface speed control mechanism for a lathe wherein variations in surface speed of a workpiece are controlled by electronic/electrical means readily accessible to an operator during cutting operations. Referring to the figure there is illustrated the use of a plastic or diecast handgrip (14) which is fitted over a cutting chisel handle (15). Handgrip (24) houses a UHF (2 channel) transmitter with control buttons (16 and 17) for fast and slow operation of the headstock spindle. This control handgrip can be operated by the wood turner whilst cutting the workpiece (18) secured to the headstock with chisel (19) supported on tool rest (20).

Description

TITLE: REMOTE CONSTANT SURFACE SPEED CONTROL
FIELD OF THE INVENTION
This invention relates to a remote constant surface speed control and in particular, but not exclusively so, to a remote speed control for a wood turning lathe.
BACKGROUND TO THE INVENTION
The problem of varying surface speeds of the workpiece when working from a fairly large outer dimension to the centre thereof, and vice versa, has always been a problem when turning bowl type objects.
In the very earliest type of wood turning lathe where rotation of the lathe headstock was achieved by reciprocating motion of a foot operated treadle converting reciprocating motion of the treadle into rotary motion by crank means, this problem of speed variation of the workpiece could be achieved to some degree although not in a constant varying action.
In later forms of wood turning lathes, the drive to the headstock is by belt from an overhead driven shaft and pulley to a number of pulleys of varying diameters at the headstock of the lathe. With this type of drive, it is necessary for the operator during a cutting process across a workpiece through varying diameters, to move the chisel away from the workpiece and change the belt to another pulley giving the required new speed and then start cutting operations again.
This problem also occurs with gear driven headstocks and although gear change levers may be available, it is not safely or physically possible to maintain a true cutting operation whilst trying to engage another drive gear with one hand whilst maintaining the cutting chisel on its support and in engagement with the workpiece. In effect, with gear driven and belt driven headstocks it is necessary to stop operations on the workpiece and then carry out the required gear change.
If, in order to overcome the necessity for changes in cutting speed, it is decided to chose an optimum speed for the chisel or cutting edge to move across the workpiece, this optimum speed being usually chosen that will be too fast at the rim of the workpiece and too slow at the centre. This action may partly satisfy the cutting speed requirements for particular diameters but usually results in flexing at the outer diameter of the workpiece with attendant vibration and ripple on the cut surface. Also, without the necessary surface speeds of the workpiece, it is detrimental to the finished correct presentation of the direction of grain in the finished workpiece article. The present invention has been evolved to overcome the disadvantages of the prior constructions of wood turning lathes and allow an operator to incrementally alter workpiece speed as the cutting action proceeds without any significant interruption on the action of the operator, and with increased safety in the operation of the lathe.
SUMMARY OF THE INVENTION
The present invention provides in one aspec :-
a remote constant surface speed control mechanism for a wood turning lathe wherein variations in surface speed of a workpiece are controlled by electronic/electrical means accessible to the operator during cutting operations;
and in another aspect there is provided: -
a remote surface speed control for the headstock drive spindle of a wood turning lathe comprising manually operable electronic/electrical control means incorporated in the handle socket of a chisel or the like, hand controlled working tool, which socket locates a UHF transmitter adapted for finger control of the lathe headstock spindle speeds through a UHF received speed control potentiometer connected to the headstock spindle drive.
PREFERRED ASPECTS OF THE INVENTION
The electronic/electrical control means may comprise a UHF transmitter having hand or finger operating means and a receiver and control unit which operates a speed control potentiometer to control the headstock drive spindle speed via an electronic inverter drive system.
In order that the invention and its manner of performance may be more fully described, reference will now be made to - A - embodiments of the invention as illustrated in the accompanying drawings.
BRIEF DESCRIPTION OF THE VIEWS OF THE DRAWINGS
Figure 1 is a perspective view of part of a wood turning lathe;
Figure 2 is a perspective view of the use of a cutting chisel on the tool rest of the lathe;
Figure 3 is a perspective view of a control socket attachable on the chisel handle; and
Figure 4 is a perspective view of a bowl produced according to the present invention.
INTEGER LIST
5. Lathe
6. Lathe pedestal
7. Lathe pedestal
8. Lathe bed
9. Electric drive motor 10. Control box
11. Control button
12. Stop button
13. Start button
14. Chisel handgrip 15. Chisel handle
16. Control button
17. Control button
18. Workpiece
19. Chisel 20. Tool rest 21. Bowl DETAILED DESCRIPTION WITH RESPECT TO THE DRAWINGS
Referring to the drawings, Figure 1 illustrates in part the lower section of a wood turning lathe 5 having pedestal members 6 and 7, the latter supporting the lathe bed 8, pedestal 6 also locating and supporting electric drive motor 9, headstock (not shown) and drive gear to the headstock spindle.
On pedestal 7 there is located a control box 10 housing a remote control UHF receiver (2 channel), manual/motorised speed control potentiometer, amplifier and relays for fast/slow control of the headstock spindle. The finger controlled rotary stepped button 11 controls the potentiometer and buttons 12 and 13 are stop/start buttons for the speed control. It will be noted that the remote speed control can be overridden by manual control if required.
Referring to Figure 2 there is illustrated the use of a plastics or diecast handgrip 14 which is fitted over a cutting chisel handle 15. Handgrip 14 houses a UHF (2 channel) transmitter with control buttons 16 and 17 for fast and slow operation of the headstock spindle. This control handgrip can be operated by the wood turner whilst cutting the workpiece 18 secured to the headstock with chisel 19 supported on tool rest 20.
Pressing the slow button on handgrip 14 continuously will cause a first signal of the UHF receiver to turn the potentiometer gradually to its slowest position and pressing the fast button will cause a second signal of the UHF receiver to turn the potentiometer gradually to its fastest position. Pressing the fast or slow button momentarily will cause infinite increases or decreases in speed as required through the complete speed range of the headstock drive spindle. Figure 3 illustrates the removable handgrip 14 attachable over the chisel handle 15 and Figure 4 illustrates a finished bowl product 21 illustrating the necessity of correct rotational cutting speeds throughout the diameter of the bowl to bring out the end and side grain in the finished product.
The present invention, it will be appreciated, provides a means of controlling surface speed of a workpiece, wherein in the case of a bowl of 500mm outside diameter, it is necessary for optimum results to have available several speed changes during the cutting operation of the lathe.
The present invention allows the operator to change speed as necessary by merely pressing one of the buttons on handgrip 14 or on the control box 10 on pedestal 7 to either increase or decrease speed of the headstock spindle in infinite increments throughout the entire speed range of the lathe.
Thus, the operator has complete control of surface speed and cutting conditions without removing the cutting tool from the work surface or stopping the lathe. This allows for more efficient work practice, increased safety through absolute control and superior surface finish as optimum cutting speeds can be maintained across extreme diameter workpiece variations.
The present invention is eminently suitable for use with the lathe the subject of my Application No. PCT/AU96/00090.
It will be appreciated that the control mechanism of the present invention may be applied to large cranes controlled by D.C. motors which are expensive to maintain, also their control gear, by replacing with less expensive A.C. motors having a longer maintenance period and having a ground located operator to control level of the load being lifted, by radio which control gear would be relatively less expensive to maintain.
It will also be appreciated that there may be made many modifications in details of design and configuration within the broad scope of the present invention and all such modifications are deemed to be within the scope of the present invention.

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:-
1. A remote constant surface speed control mechanism for a lathe wherein variations in surface speed of a workpiece are controlled by electronic/electrical means readily accessible to an operator during cutting operations.
2. A remote constant surface speed control mechanism according to Claim 1 wherein the lathe is a wood turning lathe.
3. A remote constant surface speed control mechanism according to Claim 1 or Claim 2 wherein the control mechanism comprises an operator finger control means located on the hand grip of a chisel or the like working tool.
4. A remote constant surface speed control mechanism according to Claim 3 wherein the finger control means on the handle grip comprises a UHF ( 2 channel ) transmitter with control buttons for fast and slow operation of the drive spindle of the lathe headstock through a remote control UHF received (2 channel) manual/ otorised speed control potentiometer located on the pedestal of the lathe and connected to an electric drive to the headstock spindle.
5. A remote constant surface speed control mechanism according to Claim 4 and including stop/start controls on the pedestal of the lathe operable to manually override the remote speed control.
6. A method of operating a remote constant surface speed control mechanism according to Claim 4 or Claim 5 wherein pressing the slow button on the handle grip causes a first signal of the UHF receiver to turn the potentiometer gradually to its slowest position and pressing the fast button will cause a second signal of the UHF receiver to turn the potentiometer gradually to its fastest position.
7. A method of operating a remote constant surface speed control mechanism according to Claim 6 wherein pressing the fast or slow button momentarily will cause infinite increases or decreases in the headstock spindle speed as required through the complete speed range of the headstock drive.
8. A remote surface speed control for the headstock drive spindle of a wood turning lathe comprising manually operable electronic/electrical control means incorporated in the handle socket of a chisel of the like hand controlled working tool which socket locates a UHF transmitter adapted for finger control of the lathe headstock spindle speeds through a UHF receiver speed control potentiometer connected to the headstock spindle drive.
PCT/AU1997/000574 1996-09-06 1997-09-05 Remote constant surface speed control WO1998009782A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU40045/97A AU4004597A (en) 1996-09-06 1997-09-05 Remote constant surface speed control

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPO2183 1996-09-06
AUPO2183A AUPO218396A0 (en) 1996-09-06 1996-09-06 Remote constant surface speed control

Publications (1)

Publication Number Publication Date
WO1998009782A1 true WO1998009782A1 (en) 1998-03-12

Family

ID=3796496

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1997/000574 WO1998009782A1 (en) 1996-09-06 1997-09-05 Remote constant surface speed control

Country Status (2)

Country Link
AU (1) AUPO218396A0 (en)
WO (1) WO1998009782A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1411217A (en) * 1971-08-05 1975-10-22 Wickman Mach Tool Sales Ltd Control apparatus
US4208930A (en) * 1945-09-27 1980-06-24 Leblond Incorporated Spindle control mechanism
US5137065A (en) * 1987-10-20 1992-08-11 Stewart Dennis K Wood-turning chatter tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4208930A (en) * 1945-09-27 1980-06-24 Leblond Incorporated Spindle control mechanism
GB1411217A (en) * 1971-08-05 1975-10-22 Wickman Mach Tool Sales Ltd Control apparatus
US5137065A (en) * 1987-10-20 1992-08-11 Stewart Dennis K Wood-turning chatter tool

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DERWENT ABSTRACT, Accession No. B1887D/06, Class P56; & WO,A,81 00073 (FUJITSU FANUC), 22 January 1981. *

Also Published As

Publication number Publication date
AUPO218396A0 (en) 1996-10-03

Similar Documents

Publication Publication Date Title
CA2144804C (en) Variable speed direct drive drill press/router
US10821571B2 (en) Handheld, hand-guided cutting-off machine
CA1204067A (en) Clutch assembly for sanding head
US5549023A (en) On-car disc brake lathe
GB2420843A (en) Hand machine tool comprising a rotatable handle for controlling the speed of a motor
US20180345456A1 (en) Handheld, hand-guided cutting-off machine
US6569002B2 (en) Hand-held oscillating spindle sander
US6516693B1 (en) Process and device for the control of a motorized feed drive
US5499563A (en) On-car disc brake lathe
RU1829982C (en) Manually-controlled lathe
WO1998009782A1 (en) Remote constant surface speed control
WO2001094088A3 (en) Arrangement on granulating devices
CN210081329U (en) Easily-regulated and controlled grinding device for crankshaft machining
US3977127A (en) Multi-purpose hobby finishing apparatus
EP1178871A1 (en) Border planing machine for wood floors
CN209207716U (en) A kind of green outer ring of novel bamboo tube bamboo eliminating equipment together
US20040223820A1 (en) Drilling device having driving and rotating motor
US20210197332A1 (en) Transmission structure of woodworking lathe
CN215239920U (en) Multistage step grinding device
CN220661369U (en) Embedded skirting line wall body fluting device
CN220296606U (en) Diamond circular saw blade sharpening and polishing device
CN210909007U (en) Transmission shaft for numerically controlled lathe
KR200227535Y1 (en) Grinding Apparatus for Lathe
RU1818224C (en) Universal woodworking machine
KR930007514Y1 (en) Grinding attachment

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 GE HU ID IL 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 TJ TM TR TT UA UG US UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH KE LS MW SD SZ UG ZW AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF

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
NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 1998512053

Format of ref document f/p: F

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA