AU2006246526A1 - Joining Device for Ventilation Ducting - Google Patents
Joining Device for Ventilation Ducting Download PDFInfo
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- AU2006246526A1 AU2006246526A1 AU2006246526A AU2006246526A AU2006246526A1 AU 2006246526 A1 AU2006246526 A1 AU 2006246526A1 AU 2006246526 A AU2006246526 A AU 2006246526A AU 2006246526 A AU2006246526 A AU 2006246526A AU 2006246526 A1 AU2006246526 A1 AU 2006246526A1
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- Australia
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- ducting
- joining
- lengths
- cradle
- ventilation
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Description
P/00/009 28/5/91 Regulation 3.2
ORIGINAL
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION Invention title: "JOINING DEVICE FOR VENTILATION
DUCTING"
Applicant: DAVID JOHN WILKIE The following statement is a full description of this invention, including the best method of performing it known to me: "JOINING DEVICE FOR VENTILATION DUCTING" (-i Field of the Invention The present invention relates to a joining device for ventilation ducting and relates particularly, though not exclusively, to such a joining device for joining Slengths of ventilation ducting of the kind used for conveying air through a (mine shaft.
Background to the Invention Underground mines are typically provided with ventilation shafts through which fresh air is pumped, and stale air exhausted, to allow underground workers to breathe and to allow machinery driven by internal combustion engines to operate. Frequently, secondary air is also pumped through ventilation ducting which is suspended from the roof of mine access shafts.
Prior art ventilation ducting typically comprises a tube of flexible, air impervious material such as canvas or a plastics material, which is hung by a connecting fin on a knocker line adjacent to the mine shaft roof. The connecting fin has a plurality of apertures provided therein at spaced intervals for attachment to the line using suitable clips or cable ties. The tube is formed with a mouth at each end adapted to be joined end to end to a similar, adjoining ventilation duct. In one prior art arrangement the mouth is formed with a flexible spigot, having a sleeve that folds over so as to be received in the mouth of an adjoining duct and to lie flat against an inner surface of the adjoining duct. The spigot of the duct is formed with a plurality of apertures, at spaced intervals around its circumference, for joining the end of the duct to the mouth of an adjoining duct using suitable clips or other fasteners. The apertures in the spigot are typically reinforced with metal eyelets.
Because of the additional labour and materials associated with the mouth at each end, the ends of the tube are the most expensive component of the ducting. However each time a length of the tube is cut to suit the particular requirements of a mine site, a new end has to be sewn onto or otherwise manufactured at the mouth of the tube to enable it to be joined end to end with an adjoining tube. This adds considerably to the cost and inconvenience U of replacing damaged lengths of ventilation ducting.
The present invention was developed with a view to providing a joining device for joining lengths of ventilation ducting that can be used over and over again without having to manufacture a new end at the mouth of the tube every time Iit is cut.
IReferences to prior art in this specification are provided for illustrative N purposes only and are not to be taken as an admission that such prior art is part of the common general knowledge in Australia or elsewhere.
Summary of the Invention According to one aspect of the present invention there is provided a joining device for joining end to end lengths of ventilation ducting of flexible, tubular elongate construction, the joining device comprising: a hollow support cradle capable of supporting the ends of two adjoining lengths of ventilation ducting, said support cradle having an external groove formed in an outer surface thereof; and, a locking means adapted to be received in said external groove for retaining the ends of the ventilation ducting in said support cradle in a close friction fit.
Preferably the hollow support cradle is capable of supporting the ends of two adjoining lengths of ventilation ducting in an abutting configuration.
Alternatively the cradle may support the ends of the ducting in an overlapping configuration.
Preferably said locking means is one of a pair of said locking means, one each for retaining the end of each of the two adjoining lengths of ventilation ducting. In a preferred embodiment said external groove is one of a pair of adjacent external grooves, each one of said pair of adjacent external grooves being adapted to receive one of said pair of locking means therein.
In the preferred embodiment said support cradle has a pair of adjacent inner external grooves and a pair of outer external grooves, each of said outer
IND
grooves being located adjacent to one of said inner grooves respectively so as to form two adjacent pairs of inner and outer grooves. Preferably a first pair of said inner and outer grooves receives the end of one of the adjoining lengths of ventilation ducting therein, and the second pair of said inner and outer grooves receives the end of the other of the adjoining lengths of Iventilation ducting therein. Preferably each pair of inner and outer grooves is provided with a pair of said locking means for retaining the end of a respective one of the adjoining lengths of ventilation ducting therein.
Preferably an end of one of the lengths of ventilation ducting is drawn over the first pair of the inner and outer grooves and retained in the inner groove by means of one of the pair of locking means at a position so as to allow a remaining free end of ducting, the free end being folded back over the end retained in the inner groove and being secured in the outer groove by means of the second of the pair of locking means.
Preferably the joining device further comprises a pair of inner dividing walls between the respective pairs of the inner and outer grooves which are of a lower height than a pair of outer peripheral walls of the respective outer grooves to facilitate the insertion of a respective locking ring into the inner grooves. Preferably the two inner grooves are separated by a central dividing wall which is the same height as the outer peripheral walls. In a preferred embodiment, the inner dividing walls and are approximately 8mm in height, and the central dividing wall and the outer peripheral walls are both approximately 10mm in height. In a further preferred form, the outer peripheral walls have respective bevelled outer peripheral edges to facilitate the insertion of a respective locking ring into the outer grooves.
Preferably said support cradle is of circular configuration. In practice the support cradle is usually about 120mm wide.
The one or more external grooves of the joining device are preferably about 10mm deep and about 20mm wide.
IND
\O
As an alternative the cradle may be provided with a joining slit across its O width. One edge of the cradle adjacent the slit is preferably provided with a Splurality of protrusions adapted to engage in a plurality of corresponding slots located in an opposing edge of the cradle in a male-female arrangement.
Preferably the cradle has four protrusions which fit into four corresponding IDslots to provide a convenient means of joining the cradle ready for use.
n Preferably the protrusions are of dove tail configuration.
Preferably said locking means is in the form of a locking ring having an inner diameter of similar size to that of said external groove.
r Preferably said support cradle is made from a resilient plastics material. More preferably said support cradle is made from a resilient polymer plastics material such as polyethylene. Preferably said locking means is also made from a resilient plastics material. Typically said locking means is made from the same resilient polymer plastics material as the support cradle, such as polyethylene.
The invention also provides a method of joining a first length and a second length of ventilation ducting, the method comprising: drawing an end of the first length of the ducting over a first pair of inner and outer external grooves on an outer surface of a cradle; (ii) positioning a first locking ring into the first inner groove to retain the end of the ducting in position whilst leaving a free end of the first length of the ducting; (iii) folding the free end of the first length of ducting over the end retained in the first inner groove; (iv) and positioning a second locking ring into the outer groove to retain the first length of ducting in position on the cradle; drawing an end of the second length of the ducting over a second pair of inner and outer external grooves on the outer surface of the cradle;
IND
\O
O (vi) positioning a third locking ring into the second inner groove to retain the end of the second length of ducting in position whilst leaving Sa free end of the second length of the ducting; (vii) folding the free end of the second length of ducting over the end retained in the second inner groove; and
IND
S(viii) positioning a fourth locking ring into the second outer groove to IDretain the second length of ducting in position on the cradle.
SThe invention further provides a method of joining a first length and a second length of ventilation ducting, the method comprising: drawing an end of the first length of the ducting over an inner surface of a support cradle and folding it back over an outer surface of the cradle, the outer surface of the cradle being provided with a first external groove and a second external groove; (ii) placing an end of the second length of ducting on top of the first length of folded ducting leaving a free end of the second length of ducting; (iii) positioning a first locking ring in the first groove to retain the first and second lengths of ducting in position on the cradle; and (iv) positioning a second locking ring in the second groove to retain the first and second lengths of ducting in position on the cradle.
Throughout the specification, unless the context requires otherwise, the word "comprise" or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers. Likewise the word "preferably" or variations such as "preferred", will be understood to imply that a stated integer or group of integers is desirable but not essential to the working of the invention.
Brief Description of the Drawings The nature of the invention will be better understood from the following detailed description of several specific embodiments of the joining device, given by way of example only, with reference to the accompanying drawings, in which:
(NO
I Figure 1 is a perspective view of a first preferred embodiment of the O joining device in accordance with the present invention; SFigure 2 is an exploded view of the joining device of Figure 1; Figures 3a 3d are section views through a support cradle of the joining device of Figure 1 showing the manner in which the locking rings are received and retained in the support cradle; Figure 4 illustrates two lengths of ventilation ducting joined end to end using the joining device of Figure 1; Figure 5 illustrates a section view of a second preferred embodiment of the joining device in accordance with the present invention; and Figure 6a and 6b illustrate a perspective view of a support cradle of a third preferred embodiment of the invention.
Detailed Description of Preferred Embodiments A first preferred embodiment of the joining device 10 of the invention, as illustrated in the accompanying drawings, comprises a hollow support cradle 12 capable of supporting the ends of two adjoining lengths of ventilation ducting, the ducting being subject to high pressure and high air volume conditions, such as in mines. The support cradle 12 of this embodiment is of circular configuration and has an external groove 14 formed in an outer circumferential surface thereof. A locking means 16 adapted to be received in the external groove 14 is provided for retaining the ends of the ventilation ducting in said support cradle in a close friction fit. In this embodiment the
IND
\O
O locking means is in the form of a locking ring 16 having an inner diameter of similar size to that of the external groove 14. However it will be appreciated a) Sthat the locking means 16 may take several different forms as will be explained in more detail below.
In the illustrated first embodiment the support cradle 12 is formed with four D external grooves of annular configuration. As can be seen most clearly in
(N
n Figure 3, the support cradle 12 has a pair of adjacent inner external grooves 14a and 14b and a pair of outer external grooves 18a and 18b, each of said outer grooves 18a and 18b being located adjacent to one of the inner grooves S14a and 14b respectively so as to form two adjacent pairs of inner and outer grooves. Preferably a first pair of the inner and outer grooves 14a and 18a receives the end 20a of one of the adjoining lengths of ventilation ducting 22a therein, and the second pair of inner and outer grooves 14b and 18b receives the end 20b of the other of the adjoining lengths of ventilation ducting 22b therein. Preferably each pair of inner and outer grooves 14 and 18 is provided with a pair of locking rings 16 for retaining the end 20 of a respective one of the adjoining lengths of ventilation ducting therein 22.
In the illustrated first embodiment the support cradle is approximately 120mm wide and the external annular grooves formed its outer surface are approximately 10mm deep and 20mm wide. Preferably a pair of inner dividing walls 24a and 24b, between the inner and outer grooves 14 and 18, are of slightly less height than a pair of outer peripheral walls 26a and 26b, in order to facilitate the insertion of a respective locking ring into the inner grooves 14a and 14b (see Figure 3a). Preferably the two inner grooves 14a and 14b are separated by a central dividing wall 28 which is the same height as the outer peripheral walls 26a and 26b. In the illustrated first embodiment the inner dividing walls 24a and 24b are approximately 8mm in height, and the central dividing wall 28 and the outer peripheral walls 26a and 26b are approximately 10mm in height. Preferably the outer peripheral walls 26a and 26b have a bevelled outer peripheral edge 30a and 30b to facilitate the insertion of a respective locking ring 16 into the outer grooves 18a and 18b.
1
IND
\O
O Preferably the support cradle 12 and the locking rings 16 are made from a resilient plastics material, more preferably a resilient polymer plastics material d) Ssuch as polyethylene. The components of the joining device are preferably manufactured using any suitable plastics moulding technique, such as injection moulding, rotational moulding or extrusion moulding.
IDAs illustrated in Figure 6, a third preferred embodiment of a joining device 48
(N
V)has a support cradle 50 with a joining slit 52. The cradle 50 has a first end 54 and a second end 56 adjacent the slit 52. The first end 54 is provided with D 10 "dove tail" protrusions 58 which lock into corresponding slots 60. In this way, Sthe cradle may be joined after fabrication to form a single circular piece suitable for use in the present invention. This means of joining provides an alternative to heat welding of the cradle profile.
A preferred method of joining two lengths of ventilation ducting 22a and 22b end to end will now be described with reference to Figures 3 and 4.
Firstly, two of the locking rings 16 are removed from the support cradle 12 and threaded over the outside of the first length of ventilation ducting 22a.
Then the end 20a of the first length of ducting 22a is pulled over the outer surface of the cradle, as shown in Figure 3a, so that it is supported in an open configuration. Sufficient fabric of the end 20a is pulled over the first pair of inner and outer grooves 14a and 18a to enable the end and/or tail of the ducting fabric to be folded back onto itself as shown in Figure 3c. One of the locking rings 16 is then pushed back over the outer peripheral wall 26a and the inner dividing wall 24a into the inner groove 14a, as shown in Figure 3b.
As noted above, the locking rings 16 have an inner diameter of similar size to that of the external grooves 14 and 18, and therefore they do not easily slip over the outer peripheral wall 26a and the inner dividing wall 24a. However the flexibility and resilience of the polymer plastics material allows the locking ring 16 to flex sufficiently to be forced over the walls 26a and 24a. The bevelled edge 30a on the outer peripheral wall 26a, and the reduced height of the inner dividing wall 24a also facilitates the sliding movement and insertion of the locking ring 16 into the inner groove 14a. A portion of the fabric of the
I
IND
\O
O end 20a of the ducting is thus locked into the inner groove 14a by the locking ring 16.
In order to further secure the end 20a of ducting 22a in the support cradle 12, the tail of the ducting fabric is folded back onto itself, as shown in Figure 3c, and the second locking ring 16 is forced over the outer peripheral wall 26a IDand into the outer groove 18a. When the second locking ring 16 is seated in
(N
V)the outer groove 18a, as shown in Figure 3d, the tail of the ducting fabric is thus locked into the outer groove 18a by the locking ring 16. The end 20a of the ventilation ducting 22a is thus not only securely retained in the support Scradle 12 by a close friction fit between the locking rings and the grooves, but the cradle 12 and the locking rings 16 also form an effective air-tight connection. The folding back of the ducting fabric onto itself together with the formation of a close friction fit between the locking rings and the grooves ensure that the joined sections of the ducting fabric can withstand the high pressure and high volumes required for ducting in a mining environment.
The same process is repeated for the end 20b of the other length of ventilation ducting 22b (not shown in Figure until the end 20b is securely retained in the support cradle 12 by a close friction fit between the locking rings 16 and the second pair of inner and outer grooves 14b and 18b. The joining device 10 can thus be used to join two lengths of ventilation ducting securely end to end in an abutting configuration without requiring any special fasteners or preparation of the ends 20 of the ducting fabric. As shown in Figure 4, the only components of the joining device visible from the outside are the central dividing wall 28 and the two locking rings 16 in the outer grooves 18a and 18b. This means that a length of ventilation ducting can be easily cut and joined at any point without additional cost. Furthermore the same joining device 10 can be employed over and over again. In addition, the joining device 10 has no protrusions that can catch on moving vehicles. It is lightweight and flexible.
From the above description it will be apparent that the locking means 16 may take any suitable form, and are not limited to the locking rings of the
IND
\O
O illustrated first embodiment. For example, instead of locking rings, ratchet straps, bandit straps, rubber rings or cable ties could be used to retain the Sends of the ducting in the external grooves of the support cradle 12.
Furthermore, it is not essential that there be two pairs of inner and outer grooves 14 and 18 as in the illustrated first embodiment. It would be possible, IDfor example, to have a single central external groove within which the locking Smeans for retaining the ends of both lengths of ducting is received.
Alternatively, only two external grooves may be provided with no provision to N 10 fold the fabric of the ducting back onto itself as in the first preferred Sembodiment. As illustrated in a second preferred embodiment in Figure 5, the end 42a of the first length of ducting 44a is pulled over the inner surface of the support cradle 36, the cradle having two external grooves 38a and 38b.
The end 42a is then wrapped around over the outer surface of the cradle 36.
The end 42b of the second length of ducting 44b is then placed on top of the end 42a of the first length of ducting 44a and wrapped around the first locking ring 40a and underneath the second locking ring 40b as illustrated. The locking rings 40a and 40b are then pressed into the external grooves 38a and 38b respectively to hold the two lengths of ducting 44a and 44b in a secure joined arrangement.
Now that preferred embodiments of the joining device have been described in detail, it will be apparent that it provides a number of advantages over the prior art, including the following: It has particular application in the high pressure and high air volume environments required in underground mining.
(ii) The end of the ventilation ducting is securely retained in the support cradle by a close friction fit between the locking rings and the inner and outer grooves.
(iii) It can be used over and over again without having to manufacture a new end at the mouth of the tube every time it is cut.
IND
\O
(iv) It does not require any special fasteners or preparation of the ends of the ducting fabric to be effective.
A length of ventilation ducting can be easily cut and joined at any point without additional cost.
(vi) It is simple to use, and easy and inexpensive to manufacture.
C
(vii) The device has no protrusions which can catch on moving vehicles.
S(viii) The device is flexible and lightweight, and sustains impacts from moving objects and from explosions.
It will be readily apparent to persons skilled in the relevant arts that various modifications and improvements may be made to the foregoing embodiments, in addition to those already described, without departing from the basic inventive concepts of the present invention. For example, in the illustrated embodiment it is assumed that the ducting is of circular cross-section and therefore that the support cradle of the device is also circular. However, the support cradle and locking means can be manufactured with any desired cross-sectional shape, for example rectangular, to join other kinds of ducting end to end. Therefore, it will be appreciated that the scope of the invention is not limited to the specific embodiments described.
Claims (23)
1. A joining device for joining end to end lengths of ventilation ducting of flexible, tubular elongate construction, the joining device comprising: a hollow support cradle capable of supporting the ends of two adjoining D lengths of ventilation ducting, said support cradle having an external (N groove formed in an outer surface thereof; and, N a locking means adapted to be received in said external groove for retaining the ends of the ventilation ducting in said support cradle in a N close friction fit.
2. A joining device for joining end to end lengths of ventilation ducting according to claim 1, wherein the hollow support cradle is capable of supporting the ends of two adjoining lengths of ventilation ducting in an abutting configuration.
3. A joining device for joining end to end lengths of ventilation ducting according to claim 1, wherein the cradle supports the ends of two adjoining lengths of ventilation ducting in an overlapping configuration.
4. A joining device for joining end to end lengths of ventilation ducting according to claim 2 or claim 3, wherein said locking means is one of a pair of said locking means, one each for retaining the end of each of the two adjoining lengths of ventilation ducting.
5. A joining device for joining end to end lengths of ventilation ducting according to claim 4, wherein said external groove is one of a pair of adjacent external grooves, each one of said pair of adjacent external grooves being adapted to receive one of said pair of locking means therein.
6. A joining device for joining end to end lengths of ventilation ducting according to claim 2, wherein said support cradle has a pair of adjacent inner external grooves and a pair of outer external grooves, each of said outer grooves being located adjacent to one of said inner 1 14 IND \O O grooves respectively so as to form two adjacent pairs of inner and Souter grooves.
7. A joining device for joining end to end lengths of ventilation ducting according to claim 6, wherein a first pair of said inner and outer grooves receives the end of one of the adjoining lengths of ventilation INDducting therein, and the second pair of said inner and outer grooves V)receives the end of the other of the adjoining lengths of ventilation ducting therein. IND 010 8. A joining device for joining end to end lengths of ventilation ducting C according to claim 7, wherein each pair of inner and outer grooves is provided with a pair of said locking means for retaining the end of a respective one of the adjoining lengths of ventilation ducting therein.
9. A joining device for joining end to end lengths of ventilation ducting according to claim 8, wherein an end of one of the lengths of ventilation ducting is drawn over the first pair of the inner and outer grooves and retained in the inner groove by means of one of the pair of locking means at a position so as to allow a remaining free end of ducting, the free end being folded back over the end retained in the inner groove and being secured in the outer groove by means of the second of the pair of locking means. A joining device for joining end to end lengths of ventilation ducting according to any one of claim 6 to claim 9, wherein a pair of inner dividing walls between the respective pairs of the inner and outer grooves are of a lower height than a pair of outer peripheral walls of the respective outer grooves to facilitate the insertion of a respective locking ring into the inner grooves.
11. A joining device for joining end to end lengths of ventilation ducting according to claim 10, wherein the two inner grooves are separated by a central dividing wall which is the same height as the outer peripheral walls. IND \O
12. A joining device for joining end to end lengths of ventilation ducting Uaccording to claim 11, wherein the inner dividing walls are Sapproximately 8mm in height, and the central dividing wall and the outer peripheral walls are both approximately 10mm in height.
13. A joining device for joining end to end lengths of ventilation ducting IDaccording to claim 12, wherein the outer peripheral walls have (N V)respective bevelled outer peripheral edges to facilitate the insertion of a respective locking ring into the outer grooves.
14. A joining device for joining end to end lengths of ventilation ducting according to any one of the preceding claims, wherein said support cradle is of circular configuration. A joining device for joining end to end lengths of ventilation ducting according to claim 14, wherein the support cradle is about 120mm wide.
16. A joining device for joining end to end lengths of ventilation ducting according to any one of the preceding claims, wherein the one or more external grooves is about 10mm deep and about 20mm wide.
17. A joining device for joining end to end lengths of ventilation ducting according to any one of the preceding claims, wherein the cradle is provided with a joining slit across its width.
18. A joining device for joining end to end lengths of ventilation ducting according to claim 17, wherein one edge of the cradle adjacent the slit is provided with a plurality of protrusions adapted to engage in a plurality of corresponding slots located in an opposing edge of the cradle in a male-female arrangement.
19. A joining device for joining end to end lengths of ventilation ducting according to claim 18, wherein the cradle has four protrusions which fit into four corresponding slots to provide a means of joining the cradle ready for use. \O A joining device for joining end to end lengths of ventilation ducting according to claim 18 or claim 19, wherein the protrusions are of dove Stail configuration.
21. A joining device for joining end to end lengths of ventilation ducting according to any one of the preceding claims, wherein said locking IDmeans is in the form of a locking ring having an inner diameter of (N V) similar size to that of said external groove. \O S22. A joining device for joining end to end lengths of ventilation ducting according to any one of the preceding claims, wherein said support N cradle is made from a resilient plastics material.
23. A joining device for joining end to end lengths of ventilation ducting according to claim 22, wherein said support cradle is made from a resilient polymer plastics material such as polyethylene.
24. A joining device for joining end to end lengths of ventilation ducting according to any one of the preceding claims, wherein said locking means is made from a resilient plastics material. A joining device for joining end to end lengths of ventilation ducting according to claim 24, wherein said locking means is made from a resilient polymer plastics material, such as polyethylene.
26. A method of joining a first length and a second length of ventilation ducting, the method comprising: drawing an end of the first length of the ducting over a first pair of inner and outer external grooves on an outer surface of a cradle; (ii) positioning a first locking ring into the first inner groove to retain the end of the ducting in position whilst leaving a free end of the first length of the ducting; (iii) folding the free end of the first length of ducting over the end retained in the first inner groove; IND \O O (iv) and positioning a second locking ring into the first outer groove to O retain the first length of ducting in position on the cradle; drawing an end of the second length of the ducting over a second pair of inner and outer external grooves on the outer surface of the cradle; IND S(vi) positioning a third locking ring into the second inner groove to IDretain the end of the second length of ducting in position whilst leaving N a free end of the second length of the ducting; (vii) folding the free end of the second length of ducting over the end retained in the second inner groove; and (viii) positioning a fourth locking ring into the second outer groove to retain the second length of ducting in position on the cradle.
27. A method of joining a first length and a second length of ventilation ducting, the method comprising: drawing an end of the first length of the ducting over an inner surface of a support cradle and folding it back over an outer surface of the cradle, the outer surface of the cradle being provided with a first external groove and a second external groove; (ii) placing an end of the second length of ducting on top of the first length of folded ducting leaving a free end of the second length of ducting; (iii) positioning a first locking ring in the first groove to retain the first and second lengths of ducting in position on the cradle; and (iv) positioning a second locking ring in the second groove to retain the first and second lengths of ducting in position on the cradle.
28. A method of joining a first length and a second length of ventilation ducting substantially as herein described with reference to and as illustrated in any one or more of the accompanying drawings. 18 NO
29. A joining device for joining end to end lengths of ventilation ducting substantially as herein described with reference to and as illustrated in Sany one or more of the accompanying drawings. Dated this 4th day of December 2006 \O t' David John Wilkie \0 by his Patent Attorneys SJanet Stead Associates
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2006246526A AU2006246526A1 (en) | 2005-12-05 | 2006-12-04 | Joining Device for Ventilation Ducting |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2005906802 | 2005-12-05 | ||
| AU2005906802A AU2005906802A0 (en) | 2005-12-05 | Joining Device for Ventilation Ducting | |
| AU2006246526A AU2006246526A1 (en) | 2005-12-05 | 2006-12-04 | Joining Device for Ventilation Ducting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2006246526A1 true AU2006246526A1 (en) | 2007-06-21 |
Family
ID=38255684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2006246526A Abandoned AU2006246526A1 (en) | 2005-12-05 | 2006-12-04 | Joining Device for Ventilation Ducting |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2006246526A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114963383A (en) * | 2022-05-25 | 2022-08-30 | 中电环宇（北京）建设工程有限公司 | Manufacturing and assembling method of smoke-preventing and exhausting air pipe |
-
2006
- 2006-12-04 AU AU2006246526A patent/AU2006246526A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114963383A (en) * | 2022-05-25 | 2022-08-30 | 中电环宇（北京）建设工程有限公司 | Manufacturing and assembling method of smoke-preventing and exhausting air pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK1 | Application lapsed section 142(2)(a) - no request for examination in relevant period | ||
| NB | Applications allowed - extensions of time section 223(2) |
Free format text: THE TIME IN WHICH TO REQUEST EXAMINATION HAS BEEN EXTENDED TO 10 JUN 2010. |
|
| MK4 | Application lapsed section 142(2)(d) - no continuation fee paid for the application |