CA2228446C - Extension spring-type assembly for raising sectional door - Google Patents
Extension spring-type assembly for raising sectional door Download PDFInfo
- Publication number
- CA2228446C CA2228446C CA 2228446 CA2228446A CA2228446C CA 2228446 C CA2228446 C CA 2228446C CA 2228446 CA2228446 CA 2228446 CA 2228446 A CA2228446 A CA 2228446A CA 2228446 C CA2228446 C CA 2228446C
- Authority
- CA
- Canada
- Prior art keywords
- door
- pulley
- cables
- anchored
- assembly
- 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
- 230000008602 contraction Effects 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
- E05D13/10—Counterbalance devices
- E05D13/12—Counterbalance devices with springs
- E05D13/1207—Counterbalance devices with springs with tension springs
- E05D13/1215—Counterbalance devices with springs with tension springs specially adapted for overhead wings
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D15/00—Suspension arrangements for wings
- E05D15/16—Suspension arrangements for wings for wings sliding vertically more or less in their own plane
- E05D15/24—Suspension arrangements for wings for wings sliding vertically more or less in their own plane consisting of parts connected at their edges
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/60—Suspension or transmission members; Accessories therefor
- E05Y2201/622—Suspension or transmission members elements
- E05Y2201/658—Members cooperating with flexible elongated pulling elements
- E05Y2201/668—Pulleys; Wheels
- E05Y2201/67—Pulleys; Wheels in tackles
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
- E05Y2900/106—Application of doors, windows, wings or fittings thereof for buildings or parts thereof for garages
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closing And Opening Devices For Wings, And Checks For Wings (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The assembly comprises an extension spring anchored at one end to a winch mounted to the door opening frame. A double-grooved pulley is mounted on a plate secured to the free end of the spring. A fixed second double-grooved pulley is mounted to the door frame. A pair of cables are anchored at one end to the door frame and extend in parallel to pass around the two pulleys. After the second pulley, the cables separate and extend down to the bottom corners of the door, to which they are secured. Upon release of the door latch with the door down, the spring contracts and, through the first pulley, applies an equal pull to the two cables so that they move at the same rate, thereby raising the door smoothly.
Description
'I FIELD OF THE INVENTION
2 This invention relates to a lifting assembly for an overhead sectional
3 door. More particularly it relates to an extension spring-driven assembly for this purpose.
>>
;7 In general, there are two types of lifting assembly (referred to as ~3 "hardware"), used to lift overhead sectional doors.
!a The first type is known as a torsion spring system. It involves a single 117 steel shaft mounted to the header of the door opening. A pair of torsion 1 '1 springs are slipped over the ends of the shaft and abut a fixed central anchor 1:2 bracket at their inner ends. The free end of each spring is then connected 13 with a winding plug slipped onto the shaft. A winding rod is used to turn the 1 ~4 plug and wind the spring. The plug is then secured to the shaft with set 1.5 screws. A cable drum is mounted at each end of the shaft. A cable is 1 n secured to each drum and extends down to the base of the door, to which it is 1'7 attached. The door is pulled down and locked in place. When the door is 18 unlocked, the springs unwind, turn the shaft and roll the cables up on the 19 drums, thereby lifting the door.
20 The beauty of the torsion spring system is that the two cables are 21 wound up by a common shaft. The rate of winding for each cable is therefore 22 the same. As a result, the door rises smoothly - it does not become canted 23 and bind as it is raised.
'I A disadvantage of the torsion spring system is that the hardware is relatively expensive.
;3 An extension spring system commonly involves mounting two ~t extension springs, one on each side of the door. Each spring is anchored at ',i its base to the lower end of the door opening frame. A movable pulley is Ei attached to the upper end of the spring. A second fixed pulley is suspended from a head plate secured to the door opening frame. A cable is anchored at f3 one end to the head plate. Its free end passes around the pulleys, extends Sa down the length of the door and is attached at its lower end to the door.
1I) When the door latch is released with the door closed, the two springs contract 11 and each apring pulley pulls up on its cable, which causes the door to be 1;? raised.
13 One problem with the extension spring system is that the springs may 1 ~4 pull unevenly, causing the door to cant and bind. However, this system is less 1;5 expensive than the torsion spring system and it is therefore commonly used 1 i3 for household garage doors.
1'l Another problem with the extension spring system has to do with the 1~g usual technique used to attach the spring to the door frame. This technique 1'9 involves first lifting the door to the "up" position and blocking it there. The 2~0 spring is then attached to the door frame after which the door is unblocked 21 and lowered to stretch the spring. Raising the dead weight of the door usually 22 requires more than one person. Installers are therefore not favorably inclined 2:3 to extension spring systems because of the need for more than one person to 2~4 carry out installation.
1 An objective of the present invention is to provide an extension spring-2 type system which, like a torsion spring system, applies equal lifting force and 3 raising rate to each side of the door, to thereby achieve a smooth lifting action
>>
;7 In general, there are two types of lifting assembly (referred to as ~3 "hardware"), used to lift overhead sectional doors.
!a The first type is known as a torsion spring system. It involves a single 117 steel shaft mounted to the header of the door opening. A pair of torsion 1 '1 springs are slipped over the ends of the shaft and abut a fixed central anchor 1:2 bracket at their inner ends. The free end of each spring is then connected 13 with a winding plug slipped onto the shaft. A winding rod is used to turn the 1 ~4 plug and wind the spring. The plug is then secured to the shaft with set 1.5 screws. A cable drum is mounted at each end of the shaft. A cable is 1 n secured to each drum and extends down to the base of the door, to which it is 1'7 attached. The door is pulled down and locked in place. When the door is 18 unlocked, the springs unwind, turn the shaft and roll the cables up on the 19 drums, thereby lifting the door.
20 The beauty of the torsion spring system is that the two cables are 21 wound up by a common shaft. The rate of winding for each cable is therefore 22 the same. As a result, the door rises smoothly - it does not become canted 23 and bind as it is raised.
'I A disadvantage of the torsion spring system is that the hardware is relatively expensive.
;3 An extension spring system commonly involves mounting two ~t extension springs, one on each side of the door. Each spring is anchored at ',i its base to the lower end of the door opening frame. A movable pulley is Ei attached to the upper end of the spring. A second fixed pulley is suspended from a head plate secured to the door opening frame. A cable is anchored at f3 one end to the head plate. Its free end passes around the pulleys, extends Sa down the length of the door and is attached at its lower end to the door.
1I) When the door latch is released with the door closed, the two springs contract 11 and each apring pulley pulls up on its cable, which causes the door to be 1;? raised.
13 One problem with the extension spring system is that the springs may 1 ~4 pull unevenly, causing the door to cant and bind. However, this system is less 1;5 expensive than the torsion spring system and it is therefore commonly used 1 i3 for household garage doors.
1'l Another problem with the extension spring system has to do with the 1~g usual technique used to attach the spring to the door frame. This technique 1'9 involves first lifting the door to the "up" position and blocking it there. The 2~0 spring is then attached to the door frame after which the door is unblocked 21 and lowered to stretch the spring. Raising the dead weight of the door usually 22 requires more than one person. Installers are therefore not favorably inclined 2:3 to extension spring systems because of the need for more than one person to 2~4 carry out installation.
1 An objective of the present invention is to provide an extension spring-2 type system which, like a torsion spring system, applies equal lifting force and 3 raising rate to each side of the door, to thereby achieve a smooth lifting action
4 free of canting and binding, while still maintaining the lower cost associated with an extension spring assembly.
6 Another objective is to facilitate installation of the system using only 7 one person.
SUMMARY OF THE INVENTION
In accordance with the invention:
11 ~ An extension spring means is anchored at one end to the door 12 opening frame. Preferably it is mounted along the top header.
13 Preferably it is anchored by attaching it to a winch which can be 14 used to initially stretch the spring means;
~ First pulley means, capable of working with two cables 16 simultaneously, is attached to the free end of the spring. By 17 "working with two cables simultaneously" is meant that a single 18 rotatable pulley means is provided which can accommodate two 19 cables passing thereover, so that the cables will advance longitudinally at the same rate. Preferably the pulley means 21 comprises a double groove pulley;
22 ~ Two cables are anchored at one end to the door opening frame.
23 The cables pass in parallel around the spring's double groove 24 pulley. The free ends of the two cables then pass around a stationary second pulley means capable of working with two cables 1 simultaneously. This second pulley means is secured to the door 2 opening frame, preferably in line with and spaced from the first 3 pulley means;
4 ~ The cables then separate and extend to the two corners at the base of the door, to which they are attached. Preferably, one extends 6 directly and vertically from the second pulley means; the other 7 extends over a stationary third pulley, attached to the door frame 8 header, and then extends down to the base of the door.
9 From the foregoing it will be noted that the single extension spring means pulls on both cables with the same force and moves them at the same 11 rate using the first and second pulley means, thereby minimizing the risk of 12 canting and binding, so that the door is raised smoothly.
13 Broadly stated, the invention is, in combination: a door frame forming 14 an opening; an overhead sectional door, having top and bottom corners, mounted in the opening; and an overhead door lifting assembly comprising:
16 extension spring means having first and second ends; the first end of the 17 spring means being anchored to the door frame; a single rotatable first pulley 18 means, operative to advance two cables simultaneously thereover at the 19 same rate, attached to the second end of the spring means and being free to move therewith; a single rotatable second pulley means, operative to advance 21 two cables simultaneously thereover at the same rate, anchored to the door 22 frame in spaced relation with the first pulley means; a pair of cables, each 23 having first and second ends, said cable first ends being anchored to the door 24 frame, said cables passing in parallel over the first and second pulley means, said cable second ends extending separately from the second pulley means
6 Another objective is to facilitate installation of the system using only 7 one person.
SUMMARY OF THE INVENTION
In accordance with the invention:
11 ~ An extension spring means is anchored at one end to the door 12 opening frame. Preferably it is mounted along the top header.
13 Preferably it is anchored by attaching it to a winch which can be 14 used to initially stretch the spring means;
~ First pulley means, capable of working with two cables 16 simultaneously, is attached to the free end of the spring. By 17 "working with two cables simultaneously" is meant that a single 18 rotatable pulley means is provided which can accommodate two 19 cables passing thereover, so that the cables will advance longitudinally at the same rate. Preferably the pulley means 21 comprises a double groove pulley;
22 ~ Two cables are anchored at one end to the door opening frame.
23 The cables pass in parallel around the spring's double groove 24 pulley. The free ends of the two cables then pass around a stationary second pulley means capable of working with two cables 1 simultaneously. This second pulley means is secured to the door 2 opening frame, preferably in line with and spaced from the first 3 pulley means;
4 ~ The cables then separate and extend to the two corners at the base of the door, to which they are attached. Preferably, one extends 6 directly and vertically from the second pulley means; the other 7 extends over a stationary third pulley, attached to the door frame 8 header, and then extends down to the base of the door.
9 From the foregoing it will be noted that the single extension spring means pulls on both cables with the same force and moves them at the same 11 rate using the first and second pulley means, thereby minimizing the risk of 12 canting and binding, so that the door is raised smoothly.
13 Broadly stated, the invention is, in combination: a door frame forming 14 an opening; an overhead sectional door, having top and bottom corners, mounted in the opening; and an overhead door lifting assembly comprising:
16 extension spring means having first and second ends; the first end of the 17 spring means being anchored to the door frame; a single rotatable first pulley 18 means, operative to advance two cables simultaneously thereover at the 19 same rate, attached to the second end of the spring means and being free to move therewith; a single rotatable second pulley means, operative to advance 21 two cables simultaneously thereover at the same rate, anchored to the door 22 frame in spaced relation with the first pulley means; a pair of cables, each 23 having first and second ends, said cable first ends being anchored to the door 24 frame, said cables passing in parallel over the first and second pulley means, said cable second ends extending separately from the second pulley means
5 SENT BY:OGILVIE AND COMPANY ; 7-19- 0 ; 9:55AM ; OGILIE AND COMPANY-~ 819 994 1989;# 2/ 2 1 to the lower corners of the door and being attached thereto; so that 2 contraction of the spring means causes the first pulley means to pull on the 3 cables with equal force and so that the cables move at the same rate over the 4 first and second pulley means to raise the door evenly.
6 DESCRIPTION OF THE DRAWINGS '
7 Figure 1 is a perspective view showing the upper end of a sectional
8 door equipped with hardware in accordance with the invention;
9 Figure 2 is an expanded front view of the left and right portions of the door and hardware of Figure 1;
11 Figure 3 is a front view of the door and hardware of Figure 1; and 12 Figure 4 is a perspective view of the uppEr end of the assembly.
14 DESCRIPTION OF Tt~E PREFERRED EMBODIMENT
Having reference to the Figures, the invention comprises a lifting 16 assembly 1 for raising a sectional door 2.
17 The lifting assembly 1 comprises an extension spring 3 secured at one 18 end to a stationary winch 4 of plate 4a attached to the header 5, forming part I
19 of the door frame 6.
At its other end the spring 3 is connected with a moving plate 7. ', 21 A first double-grooved pulley 10 is rotatably mounted to the plate 7.
22 A s~cond double -grooved pulley 11 is rvtatabfy mounted to the 23 header 5 at one upper corner 20 of the door 2.
24 A third single-grooved pulley 25 is mounted to the header 5 at the other upper corner 21 of the door 2.
1 Two cables 22, 23 are attached at one end to a bracket 24 secured to 2 the header 5 adjacent the door corner 20. The cables 22, 23 pass around the 3 first and second pulleys 10, 11 as shown. One cable 22 then extends down 4 directly to the door lower corner 27. The other cable 23 extends over the third pulley 25 and down to the door lower corner 28. The cables 22, 23 are 6 secured to the door 2 at the corners 27, 28 respectively.
7 When the door latch (not shown) is released, the spring 3 contracts, 8 pulling on the first pulley 10 and thereby pulling with equal force on the cables 9 22, 23 with the result that the cables are moved at the same rate to raise the door 2. The door 2 is therefore raised smoothly, without significant canting or 11 binding.
12 The best mode of the invention is shown with double-grooved pulleys 13 10, 11 in use. However those skilled in the art will appreciate that a single 14 smooth-surtaced pulley can be substituted as an alternative.
The scope of the invention is defined in the claims now following.
11 Figure 3 is a front view of the door and hardware of Figure 1; and 12 Figure 4 is a perspective view of the uppEr end of the assembly.
14 DESCRIPTION OF Tt~E PREFERRED EMBODIMENT
Having reference to the Figures, the invention comprises a lifting 16 assembly 1 for raising a sectional door 2.
17 The lifting assembly 1 comprises an extension spring 3 secured at one 18 end to a stationary winch 4 of plate 4a attached to the header 5, forming part I
19 of the door frame 6.
At its other end the spring 3 is connected with a moving plate 7. ', 21 A first double-grooved pulley 10 is rotatably mounted to the plate 7.
22 A s~cond double -grooved pulley 11 is rvtatabfy mounted to the 23 header 5 at one upper corner 20 of the door 2.
24 A third single-grooved pulley 25 is mounted to the header 5 at the other upper corner 21 of the door 2.
1 Two cables 22, 23 are attached at one end to a bracket 24 secured to 2 the header 5 adjacent the door corner 20. The cables 22, 23 pass around the 3 first and second pulleys 10, 11 as shown. One cable 22 then extends down 4 directly to the door lower corner 27. The other cable 23 extends over the third pulley 25 and down to the door lower corner 28. The cables 22, 23 are 6 secured to the door 2 at the corners 27, 28 respectively.
7 When the door latch (not shown) is released, the spring 3 contracts, 8 pulling on the first pulley 10 and thereby pulling with equal force on the cables 9 22, 23 with the result that the cables are moved at the same rate to raise the door 2. The door 2 is therefore raised smoothly, without significant canting or 11 binding.
12 The best mode of the invention is shown with double-grooved pulleys 13 10, 11 in use. However those skilled in the art will appreciate that a single 14 smooth-surtaced pulley can be substituted as an alternative.
The scope of the invention is defined in the claims now following.
Claims (5)
EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS
FOLLOWS:
1. In combination:
a door frame forming an opening;
an overhead sectional door, having top and bottom corners, mounted in the opening; and an overhead door lifting assembly comprising:
extension spring means having first and second ends;
the first end of the spring means being anchored to the door frame;
a single rotatable first pulley means, operative to advance two cables simultaneously thereover at the same rate, attached to the second end of the spring means and being free to move therewith;
a single rotatable second pulley means, operative to advance two cables simultaneously thereover at the same rate, anchored to the door frame in spaced relation with the first pulley means;
a pair of cables, each having first and second ends, said cable first ends being anchored to the door frame, said cables passing in parallel over the first and second pulley means, said cable second ends extending separately from the second pulley means to the lower corners of the door and being attached thereto;
so that contraction of the spring means causes the first pulley means to pull on the cables with equal force and so that the cables move at the same rate over the first and second pulley means to raise the door evenly.
a door frame forming an opening;
an overhead sectional door, having top and bottom corners, mounted in the opening; and an overhead door lifting assembly comprising:
extension spring means having first and second ends;
the first end of the spring means being anchored to the door frame;
a single rotatable first pulley means, operative to advance two cables simultaneously thereover at the same rate, attached to the second end of the spring means and being free to move therewith;
a single rotatable second pulley means, operative to advance two cables simultaneously thereover at the same rate, anchored to the door frame in spaced relation with the first pulley means;
a pair of cables, each having first and second ends, said cable first ends being anchored to the door frame, said cables passing in parallel over the first and second pulley means, said cable second ends extending separately from the second pulley means to the lower corners of the door and being attached thereto;
so that contraction of the spring means causes the first pulley means to pull on the cables with equal force and so that the cables move at the same rate over the first and second pulley means to raise the door evenly.
2. The assembly as set forth in claim 2 wherein:
the door frame has a header having first and second ends;
the spring means extends along the header;
the second pulley means is anchored to the header over one upper corner of the door so that one cable extends directly down to one lower corner of the door, to which it is attached;
said assembly further comprising:
a third pulley secured to the header over the other upper corner of the door; and said other cable passes over the third pulley and extends down to the other lower corner of the door, to which it is attached.
the door frame has a header having first and second ends;
the spring means extends along the header;
the second pulley means is anchored to the header over one upper corner of the door so that one cable extends directly down to one lower corner of the door, to which it is attached;
said assembly further comprising:
a third pulley secured to the header over the other upper corner of the door; and said other cable passes over the third pulley and extends down to the other lower corner of the door, to which it is attached.
3. The assembly as set forth in claim 1 wherein:
the first and second pulley means each comprise a single double-grooved pulley.
the first and second pulley means each comprise a single double-grooved pulley.
4. The assembly as set forth in claim 2 wherein:
the first and second pulley means each comprise a single double-grooved pulley.
the first and second pulley means each comprise a single double-grooved pulley.
5. The assembly as set forth in claims 1, 2, 3 or 4 comprising:
winch means, connected with the door frame and the first end of the spring means, for anchoring and stretching the spring means.
winch means, connected with the door frame and the first end of the spring means, for anchoring and stretching the spring means.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2228446 CA2228446C (en) | 1998-01-30 | 1998-01-30 | Extension spring-type assembly for raising sectional door |
| AU21466/99A AU2146699A (en) | 1998-01-30 | 1999-01-26 | Extension spring counterbalance assembly for sectional door |
| PCT/CA1999/000062 WO1999039071A1 (en) | 1998-01-30 | 1999-01-26 | Extension spring counterbalance assembly for sectional door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2228446 CA2228446C (en) | 1998-01-30 | 1998-01-30 | Extension spring-type assembly for raising sectional door |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2228446A1 CA2228446A1 (en) | 1999-07-30 |
| CA2228446C true CA2228446C (en) | 2001-08-07 |
Family
ID=4162058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2228446 Expired - Fee Related CA2228446C (en) | 1998-01-30 | 1998-01-30 | Extension spring-type assembly for raising sectional door |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2146699A (en) |
| CA (1) | CA2228446C (en) |
| WO (1) | WO1999039071A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2016738B1 (en) * | 2016-05-09 | 2017-11-16 | Condoor Group B V | Easy to install overhead door. |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1994834A (en) * | 1929-06-21 | 1935-03-19 | Kinnear Mfg Co | Overhead door |
| US1938978A (en) * | 1930-07-14 | 1933-12-12 | Frank A Hunter | Door controlling means |
| US3146825A (en) * | 1962-06-14 | 1964-09-01 | Berry Ind Inc | Counterbalance mechanism |
| AT340118B (en) * | 1974-01-30 | 1977-11-25 | Waldner Felix | TILT GATE |
| US5615723A (en) * | 1994-06-16 | 1997-04-01 | Clopay Building Products Company, Inc. | Extension spring system for an overhead door |
-
1998
- 1998-01-30 CA CA 2228446 patent/CA2228446C/en not_active Expired - Fee Related
-
1999
- 1999-01-26 WO PCT/CA1999/000062 patent/WO1999039071A1/en active Application Filing
- 1999-01-26 AU AU21466/99A patent/AU2146699A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999039071A1 (en) | 1999-08-05 |
| AU2146699A (en) | 1999-08-16 |
| CA2228446A1 (en) | 1999-07-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |