AU675391B2 - Floating debris collection - Google Patents
Floating debris collection Download PDFInfo
- Publication number
- AU675391B2 AU675391B2 AU23253/95A AU2325395A AU675391B2 AU 675391 B2 AU675391 B2 AU 675391B2 AU 23253/95 A AU23253/95 A AU 23253/95A AU 2325395 A AU2325395 A AU 2325395A AU 675391 B2 AU675391 B2 AU 675391B2
- Authority
- AU
- Australia
- Prior art keywords
- channel
- closure means
- floating debris
- water
- closed position
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B15/00—Cleaning or keeping clear the surface of open water; Apparatus therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Removal Of Floating Material (AREA)
Description
Regulation 3.2 AUS T RA LI A Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT
(ORIGINAL)
Name of Applicant: *0 00 *0 0 0* 0 00 0 0* 0 00 C 00 00 0* 0 0*
S
0 0 *0 Actual Inventor(s): Address for Service: AL"iJS O ~R 7
C
Invention Title: ANTHONY JOHN WELSHI0 ANTHONY JOHN WELSH 'EA'J~es C0\\kScr- CC),z Suttte C,5-5 -tet 4DAND-eNN vie -3175 FLOATING DEBRIS COLLECTION Divisional of Petty Patent Application No. 64877/94 The following statement is a full description of this invention, including the best method of performing it known to me/us: 1- 9S0621 ,CMSDAT.219,welhzapj n la- TITLE: FLOATING DEBRIS COLLECTION FIELD OF THE INVENTION 5 This invention relates to floating debris collection.
This invention also relates to apparatus for floating debris collection.
10 In a specific instance this invention relates to a floating debris collection device.
BACKGROUND TO THE INVENTION It is common to find debris floating along rivers or streams and in many other instances such as on the sea, in 95w2IXcmSpe.O83,w CISh.di,1 P:\0PEl\PilU323-95.316- l/I I/96 -2outfalls from storm water drains and on bodies of water.
The collection of such floating debris is difficult.
In one instance well known to the applicant, a river flows through a major city and that river is attractive other than the fact that a considerable amount of floating debris is continually seen thereon. That floating debris has resulted from debris discarded into the river itself or washed down from the catchment area of the river or poured into the river via tributary rivers or creeks or via storm drains which open to the river.
0 S. Since the river in question flows through a major city, it would be highly desirable to provide a method of collecting the debris.
;In various previous attempts, floating booms have been provided across part of the river to 15 collect the debris but such floating booms have in practice been substantial in size and have presented difficulties in confining the deqbis.
0 In particular, when the direction of water flow changes, at least at the surface, whether due to tide, current or wind, debris which had previously been collected was often washed away from the boom so that the previous collection had effectively been wasted.
The present invention seeks at least in part to alleviate some of the above problems.
SL -MARY OF THE INVENTION The present invention provides a floating debris collection device comprising flotation members adapted to maintain the device floating in a body of water; channel means defining a channel extending from a first end of the device to a second end of the device into which water and floating debris can flow at the first end and towards 30 the second end; ~BP~ 1E-a~-9P~L~14 A P':\POPHR'ilol 253-95.316 1/11/96 -3first closure means for said channel adjacent said first end; second closure means for said channel adjacent said second end; wherein the first closure means and the second closure means are each adapted to restrict floating debris in the channel from flowing out of the channel but are not such as to substantially restrict water from flowing therethrough; wherein the first closure means is movable from an open position in which said water and floating debris can flow at least substantially unrestric;tedly into the first end towards the second end to a closed position in which floating debris in the channel is substantially S" restricted from flowing out of the channel at the first end but water in the channel is not 10 substantially restricted from flowing out of the channel; S. and means sensitive to the direction of water flow with respect to the channel and operative, when said direction is generally from the first end towards the second end, to move the first closure means to said open position and operative, when said direction is generally from the second end towards the first end, to move the first closure means to said closed 0 15 position.
In use, the device of the present invention should result in floating debris being collected when said direction is from the first end towards the second end and being substantially restricted against escape when said direction is from the second end towards the first end.
Preferably, each of the first closure means and the second closure means comprises a panel, such as a mesh, having openings through which water can flow but which restrict floating debris from flowing therethrough.
Preferably the second closure means is movable from a closed position, in which it permits water flw but restricts floating debris, to an open position whereby to enable removal of floating debris from the device at the second end.
Preferably the second closure means is raisable from said closed position to said open 30 position.
P'AOPERO\PF2329 .3136 11/11196 -4- Preferably releasable means is provided for holding the second closure means in said closed position and in said open position.
Preferably the flotation members comprise two elongate members which are spaced apart and extend generally from the first end to the second end. The two elongate members advantageously at least in part define the channel, preferably a skirt depends from each elongate member. Each elongate member may comprise a pipe or series of pipes, for example of at least 200mm in diameter.
4* 0 10 Preferably the channel is open at its bottom. It would be possible to provide a bottom to the channel to collect such floating debris as sinks after collection but this is not preferred. The channel may advantageously be wider intermediate the first and second ends than at the first and second ends.
15 Preferably, spaced arms are provided at the first end to direct flowing floating debris towards the first end. Advantageously, each arm is adapted to float. Preferably the angular orientation of the arms can be varied so as to vary the direction and width of capture of floating debris.
Preferably the first closure means comprises a panel adapted to pivot about a generally horizontal axis between the closed position and the open position. The panel is advantageously biased to normally be in the closed position.
The means sensitive to the direction of water flow preferably comprises at least one vane which is movable by water flowing in said direction generally from the first end to the second end to cause the first closure means to move from the closed position to the open position.
Preferably towing and/or mooring means is provided to enable the device to be towed and/or moored.
I A:\OPERqUIMW2IM39..316. 111M BRIEF DESCRIPTION OF THE VIEWS OF THE DRAWINGS One embodiment of a floating debris collection device in accordance with the invention will now be described by way of non-limited example only with respect to the accompanying drawings, in which: Figure 1 is a plan view of the floating debris collection device; Figure 2 is a cross-sectional view on line A-A in Figure 1 but shows a component in a different position to that shown in Figure 1; Figure 3 is a cross-section on line B-B in Figure 1; and 10 Figure 4 is a cross-section on line C-C in Figure 1.
0 DETAILED DESCRIPTION WITH RESPECT TO THE DRAWINGS .The floating debris collection device 1 shown in the drawings comprises two flotation 15 members 2 which are each made of lengths of hollow polyethylene pipe 3 which are held apart in the middle by spreader bars 4 which are connected to the lengths of pipe 3 by encircling bands 6 and which are also held apart by a first end structure 7 and a second end i structure 8 but relatively convergent with respect to their width in the region of the spreader bars 4.
Beneath the lengths of pipe 3 depend skirts 9.
The function of the skirts 9 is to ensure an adequate depth for containment of material and to deal with wave action as may be present.
The flotation members 2 together with the skirt 9 define a channel 19 through the device 1 which has a first end 21 and a second end 22.
At the second end 22 is located the second end structure 8 which comprises a frame 24 RA4 secured to the lengths of pipe 3 at that second end by bands 23 which are in two pieces.
A POPflRU'H11M232.34.316. I1/11 -6- The frame slidably supports a gate 26 for vertical motion.
The gate 26 comprises a mesh 27 which has a mesh size such that water will readily pass through the mesh 27 but of size sufficiently small as to restrain floating debris above a few centimetres, for example 2-4 cm.
The gate 26 may be held in a lowered position as shown in Figure 4 or raised to an upper S* position in which it is above the surface level of a river 10 When in either the upper position or the lower position, the gate 26 can be locked in such a position by locking means which are not depicted but which may be any convenient device.
The first end structure 7 which is located at the first end 21 comprises bands 31 which are in two pieces connected to the respected lengths of pipe 3.
Connected to the bands 31 are uprights 32 which support sleeves 33.
A rod 34 is carried by the sleeves 33 such as to be rotatable in the sleeves 33.
Connectors 36 are non-rotatably attached to the rod 34 and support a gate 37 which is made of mesh 38.
The mesh 38 is similar to the mesh 27 in that it will allow water to flow through it but ;;ill restrict against passage through the mesh of floating debris in excess of the predetermined size.
The gate 37 can, by rotation of the rod 34, move from a closed position which is shown in Figure 2 to an open position which is shown in Figure 1 and vice versa as will be described hereinafter.
NAOPIUMPHIMM91316 -I I/JI/96~ -7- Also non-rotatably mounted to the rod 34 is an arm 39 which carries a counter-weight 41 which may be adjusted in position along the arm 39 to give a more or less counter-weighing effect.
Connectors 42 are non-rotatably secured to the rod 34 and carry vanes or paddles 43 which, as shown in Figure 2 when the gate 37 is in the closed position, extend well below the surface of the river.
As shown in Figure 1 the vanes or paddles 43 are relatively more horizontal and thus will be 10 less penetrating below the surface 45 of the river.
o* Lugs 48 are provided at the first end 21 of the channel 19 and carry deflector arms 49 which are conveniently made of similar pipe to the lengths of pipe 3.
15 The angular position of the deflectors arm 49 may be adjusted by telescopic adjusters 51.
The function of the deflectors arms 49 is to gather floating debris towards the first end 21 if river flow is appropriate.
Lugs 52 having openings therethrough are provided at the second end 22 and may be used for mooring the device 1 to a river bank or to anchors or other mooring means as may be convenient and may also be used for towing purposes when the device 1 is to be shifted from one place to another.
The lugs 48 may also have openings therethrough to be used for mooring purposes or towing purposes if desired.
In normal use of the device 1 the river will be flowing in the direction of the arrow 46 and this may be considered to be normal flow.
P:\OPERi\PIIX23253-9.316- 11111/96 -8- As a result of such flow in the direction of arrow 46 water will be passing the device 1 and through the channel 19 and in so doing will act on the vanes or paddles 43 to cause them to take up the position shown in Figure 1 to move the gate 37 to the open position as shown in Figure 1 with the aid of the counter-weight 4_.
As described, the first end 21 will be open and debris will be able to flow into the channel 19.
0e For the purposes of collection of debris, the gate 26 will be in the down position shown in 10 Figure 4 and while water may pass through the mesh 27, floating debris above a particular C size will be captured by the mesh 27 and will be located within the channel 19 for subsequent *removal when desired.
When it is desired to remove floating debris from the channel 19 it may be scooped therefrom by any convenient means and, if desired the gate 26 may be moved upwards to an open position and locked in that position so that the floating debris may be removed at the second end 22.
As described, the device 1 will collect debris flowing down a river when the river is flowing the direction of normal flow as indicated by arrow 46.
However, as a result of tide or wind or some other reason whereby the river flows "backwards", it will be found that the flow of the river is generally in the direction of arrow 47 and this may be considered to be reverse flow.
In that circumstance, it would be a potential risk that floating debris which had previously been captured would simply float out the first end 21 to escape into the river.
However, in the reverse flow direction indicated by arrow 47 the water will act on the vanes z/ or paddles 43 to take up the position shown in Figure 2 with the gate 37 thereby being pivoted
I
PMOPERU'111\=233-95.316- 1 1111196 -9into the closed position.
When the gate 37 is closed, water can flow through the mesh 38 but floating debris of more than a particular size will be captured by the mesh 38.
It is appreciated that water flows may not always be in the direction or arrows 46 or 47 and rather that it may be oblique or at some other direction with respect to the device 1.
However, in most situations the component of motion will have a significant direction or 10 component in the direction of arrow 46 or 47 and will thus result in the allowance of floating debris to enter into the channel 19 and prevent substantial escape of floating debris from the channel 19.
By adjusting the position of the deflector arms 49 the device 1 may collect from a different portion of the river and in this last respect, applicant states that in various tests that he has made it has become clear that in any particular river there are certain places where floating debris tends to be most common and, obviously, the device 1 should be positioned in such an area and the deflector arms 49 oriented as is appropriate to catch the maximum amount of debris.
In a specific device, the first end was approximately 1.5 metres wide, the second end was 1 metre wide, the spacing between the flotation members 2 in the region of the spreader bars 4 was 3 metres and the overall length between the first end and the second end was 8.9 metres.
The above dimensions are in no way critical but it is mentioned that a device 1 of those dimensions, on one occasion, collected 32 cubic metres of floating debris in a single day but on average collected about 2 to 4 cubic metres.
I I P:\OPER\P I\23253-95.316 22/11/96 Those skilled in the art will appreciate that the invention described herein is susceptible to variations and modifications other than those specifically descrih -d It is to be understood that the invention includes all such variations and modifications which fall within its spirit and scope as defined by the appended claims.
C
C
C
ee
C
o f 1 *0
Claims (18)
1. A floating debris collection device comprising flotation members adapted to maintain the device floating in a body of water; channel means defining a channel extending from a first end of the device to a second end of the device into which water and floating debris can flow at the first end and towards the second end; first closure means for said channel adjacent said first end; second closure means for said channel adjacent said second end; 10 wherein the first closure means and the second closure means are each adapted to restrict floating debris in the channel from flowing out of the channel but are not such as to o substantially restrict water from flowing therethrough; wherein the first closure means is movable from an open position in which said water and floating debris can flow at least substantially unrestrictedly into the first end towards the second end to a closed position in which floating debris in the channel is substantially restricted from flowing out of the channel at the first end but water in the channel is not e C a substantially restricted from flowing out of the channel; and means sensitive to the direction of water flow with respect to the channel and operative, when said direction is generally from the first end towards the second end, to move the first closure means to said open position and operative, when said direction is generally from the second end towards the first end, to move the first closure means to said closed position.
2. A device as claimed in Claim 1, wherein each of the first closure means and the second closure means comprises a panel having openings through which water can flow but which restrict floating debris from flowing therethrough.
3. A device as claimed in Claim 2, wherein said panel comprises a mesh. 30
4. A device as claimed in any preceding claim, wherein the second closure means is ~a ~111~ li\01'HHMlll ta9?1HM. ,13/tl -12- movable from a closed position, in which it permits water flow but restricts floating debris, to an open position whereby to enable removal of floating debris from the device at the second end.
5. A device as claimed in Claim 4, wherein the second closure means is raisable from said closed position to said open position.
6. A device as claimed in Claim 4 or Claim 5, wherein releasable means is provided for holding the second closure means in said closed position and in said open position.
7. A device as claimed in any preceding claim, wherein the flotation members comprise two elongate pipes which are spaced apart and extend generally from the first end to the second end.
8. A device as claimed in Claim 7, wherein the pipes at least in part define the channel
9. A device as claimed in Claim 7 or Claim 8, wherein a skirt depends from each elongate pipe. 20
10. A device as claimed in any preceding claim, wherein the channel is open at its bottom.
11. A device as claimed in any one of the preceding claims wherein the channel is wider intermediate the first and second ends than at the first and second ends.
12. A device as claimed in any preceding claim, wherein spaced arms are provided at the first end to direct flowing floating debris towards the first end.
13. A device as claimed in Claim 12, wherein each arm is adapted to float on the body of water. Pl\OI'IIIR11123Sl.95,316 l/11/ 6 13-
14. A device as claimed in Claim 12 or Claim 13, wherein the angular orientation of the arms can be varied so as to vary the direction and width of capture of floating debris.
A device as claimed in any preceding claim, wherein the first closure means comprises a panel adapted to pivot about a generally horizontal axis between the closed position and the open position.
16. A device as claimed in Claim 15, wherein the panel is biased to normally be in the closed position.
17. A device as claimed in any preceding claim, wherein towing and/or mooring means is provided to enable the device to be towed and/or moored.
18. A device as claimed in any preceding claim, wherein the means sensitive to the 13 !irection of water flow comprises at least one vane which is movable by water flowing in said direction generally from the first end to the second end to cause the first closure means to move from the closed position to the open position a a S19. A floating debris collection device substantially as hereinbefore described with i* 20 reference to the accompanying drawings. DATED this 1 th day of November, 1996. ANTHONY JOHN WELSH By his Patent Attorneys DAVIES COLLISON CAVE. ABSTRACT A floating debris collection device comprising flotation members adapted to maintain the device floating in a body of water, channel means defining a channel extending from a first end of the device to a second end of the device into which water and floating debris can flow at the first end and towards the second end, first closure means for said channel adjacent said first end, second closure means for said channel adjacent said second end; wherein the first closure means and the second closure means are each adapted to restrict floating debris in the channel from flowing out of the channel but are not such as to substantially restrict water in the channel from flowing out of the channel; wherein the first closure means is movable from an open position in which said water and floating debris can flow at least substantially unrestrictedly into the first end towards the second end to a closed position in which floating debris in the channel is substantially restricted from flowing out of the channel at the first end but not 30 substantially restricting water in the channel from flowing out of the channel; and means sensitive to the direction of water flow with respect to the channel and operative, when said direction is generally from the first end towards the second end, to move the first closure means to said open position and operative, when said direction is generally from the second
950621.cmsspc.083,%velsh.div,18 ~p end towards the first end, to move the first closure means to said closed position. In use, the device of the present invention should result in floating debris being collected when said direction is from the first end towards the second end and being substantially restricted against escape when said direction is from the second end towards the first end. b* 950621 'msspc.083,welsh.iv,19
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU23253/95A AU675391B2 (en) | 1995-06-26 | 1995-06-26 | Floating debris collection |
| AU61155/96A AU6115596A (en) | 1995-06-26 | 1996-06-25 | Floating debris collection |
| JP9504040A JPH11508337A (en) | 1995-06-26 | 1996-06-25 | Collection of suspended foreign matter |
| PCT/AU1996/000384 WO1997001680A1 (en) | 1995-06-26 | 1996-06-25 | Floating debris collection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU23253/95A AU675391B2 (en) | 1995-06-26 | 1995-06-26 | Floating debris collection |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU64877/94 Division | 1994-06-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2325395A AU2325395A (en) | 1996-01-04 |
| AU675391B2 true AU675391B2 (en) | 1997-01-30 |
Family
ID=3712378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU23253/95A Expired AU675391B2 (en) | 1995-06-26 | 1995-06-26 | Floating debris collection |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH11508337A (en) |
| AU (1) | AU675391B2 (en) |
| WO (1) | WO1997001680A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2008274C2 (en) | 2012-02-10 | 2013-08-14 | Ihc Holland Ie Bv | Sustainable filtering device for collecting floating debris. |
| CN105672225B (en) * | 2016-02-03 | 2017-05-03 | 济南大学 | Method for conducting continuous fishing and water-removed packaging of planktonic aquatic plants along with ship |
| CN107938628A (en) * | 2017-12-27 | 2018-04-20 | 西华大学 | A kind of collection device of spillage over water oil |
| CN108408832B (en) * | 2018-04-13 | 2023-11-17 | 大庆市普罗石油科技有限公司 | Self-operated liquid level automatic regulating oil collecting device |
| FR3084332B1 (en) * | 2018-07-26 | 2023-06-09 | Sebastien Marechal | FLOATING WASTE COLLECTION DEVICE IN AQUATIC ENVIRONMENT |
| CN111452925B (en) * | 2020-03-21 | 2022-01-11 | 常德市水利水电勘测设计院 | Self-suction type water surface floater cleaning structure and use method thereof |
| KR102617714B1 (en) * | 2023-06-15 | 2023-12-22 | 국립공원공단 | Unmanned floating boat for collecting floating marine debris |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4049554A (en) * | 1974-07-29 | 1977-09-20 | Shell Oil Company | Oil spill cleanup system |
| US4105554A (en) * | 1977-05-31 | 1978-08-08 | Janson John J | Oil spill retrieval system |
| EP0177853A2 (en) * | 1984-09-29 | 1986-04-16 | Gödecke Aktiengesellschaft | Antirheumatic suppositories and their preparation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT321831B (en) * | 1972-10-11 | 1975-04-25 | Johann Rafael Dipl Ing Dr H C | Floating device for the disposal of litter on and under the surface of the water |
| FR2249803A1 (en) * | 1973-11-07 | 1975-05-30 | Bes Jacques | Floating shovel for cleaning water surfaces - has plastic grille pivotally suspended by winch rope between hulls |
| US3926812A (en) * | 1974-09-03 | 1975-12-16 | Jbf Scient Corp | Floatage concentrating equipment for nautical floatage recovery apparatus |
| FR2471911A1 (en) * | 1979-12-19 | 1981-06-26 | Transfert Automation | CLEANING BARGE |
| JPS58119387A (en) * | 1982-01-11 | 1983-07-15 | Masuo Shimura | Apparatus for sucking floated substance on water surface |
| BE1007412A3 (en) * | 1993-09-24 | 1995-06-06 | Verbandt Andre | Vessel for disposal of water floating materials. |
-
1995
- 1995-06-26 AU AU23253/95A patent/AU675391B2/en not_active Expired
-
1996
- 1996-06-25 WO PCT/AU1996/000384 patent/WO1997001680A1/en active Application Filing
- 1996-06-25 JP JP9504040A patent/JPH11508337A/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4049554A (en) * | 1974-07-29 | 1977-09-20 | Shell Oil Company | Oil spill cleanup system |
| US4105554A (en) * | 1977-05-31 | 1978-08-08 | Janson John J | Oil spill retrieval system |
| EP0177853A2 (en) * | 1984-09-29 | 1986-04-16 | Gödecke Aktiengesellschaft | Antirheumatic suppositories and their preparation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11508337A (en) | 1999-07-21 |
| AU2325395A (en) | 1996-01-04 |
| WO1997001680A1 (en) | 1997-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Larinier et al. | Downstream migration: problems and facilities | |
| US5820751A (en) | Water skimming apparatus for the control of sediment pollution | |
| US5720573A (en) | Adjustable porous groynes and method for shoreline reclamation | |
| US5385428A (en) | Water intake fish diversion apparatus | |
| US5944443A (en) | Adjustable porous groynes and method for shoreline reclamation | |
| AU675391B2 (en) | Floating debris collection | |
| ES2294133T3 (en) | ADJUSTABLE POROUS STRUCTURES AND METHOD FOR RECOVERY OF LAND COSTS AND MASSES. | |
| US6499911B2 (en) | Compliant porous groin and shoreline reclamation method | |
| US7226242B2 (en) | Catch basin for salt water sand | |
| US5022784A (en) | Undertow reduction system for shoreline protection | |
| KR100973347B1 (en) | The waterway cleaning apparatus type floating movable trap | |
| US10724195B2 (en) | Aquatic curtain device and uses thereof | |
| KR100819548B1 (en) | A river pollutant removing equipment | |
| CN105839584B (en) | flood control system | |
| WO2016143013A1 (en) | Boom equipment | |
| JP3504090B2 (en) | Dust removal system for drainage system | |
| KR20150136372A (en) | Floating fence | |
| KR20220115377A (en) | apparatus for collection of floating waste on water surface | |
| KR100290951B1 (en) | Automatic floodgate | |
| CN218090760U (en) | Floater intercepting net for water resource protection | |
| KR101934106B1 (en) | River ecological restoration facilities considering river water level and geological characteristics of sediments, installation and utilization | |
| CN215105216U (en) | Automatic soil fixing device for hydro-fluctuation belt | |
| JP2000273844A (en) | Net place for intake of river | |
| GB2049001A (en) | Collapsible dams | |
| KR100414128B1 (en) | Remove apparatus for sweepings of fresh water lake |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PC | Assignment registered |
Owner name: PROVIRON PROPERTY SERVICES PTY LTD Free format text: FORMER OWNER WAS: ANTHONY JOHN WELSH |