WO2001063053A1 - Arrangement for cleaning a liquid surface region - Google Patents

Arrangement for cleaning a liquid surface region Download PDF

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Publication number
WO2001063053A1
WO2001063053A1 PCT/BR2001/000010 BR0100010W WO0163053A1 WO 2001063053 A1 WO2001063053 A1 WO 2001063053A1 BR 0100010 W BR0100010 W BR 0100010W WO 0163053 A1 WO0163053 A1 WO 0163053A1
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WO
WIPO (PCT)
Prior art keywords
pieces
liquid
suction pipe
impurities
nozzle
Prior art date
Application number
PCT/BR2001/000010
Other languages
French (fr)
Inventor
Edson De Sousa
Original Assignee
Edson De Sousa
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 Edson De Sousa filed Critical Edson De Sousa
Publication of WO2001063053A1 publication Critical patent/WO2001063053A1/en

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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
    • E02B15/04—Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials
    • E02B15/10—Devices for removing the material from the surface
    • E02B15/106—Overflow skimmers with suction heads; suction heads

Definitions

  • the present invention refers to an apparatus for cleaning a liquid surface region Bases of the Invention
  • the present invention refers to an arrangement (FIG 5) able to remove impurities from a liquid surface region
  • the surface liquid which may be water, oil or a mixture of oil and water, may suffer some adjustment in its thickness independently of the capacity of the pump
  • the rates of flow of the fluids mixture in the suction pipe (2) are as minors as nearest to nozzle (1)
  • the sector (I) (FIG 6) of the suction pipe (2) presents a rate of flow
  • suction pipe (2) From suction pipe (2) the surface liquid with impurities contained in it goes, for example to filtering system in case of solids in suspension, or to separator system in case of immiscible fluids, or to processing.
  • the use of various devices (FIG 5) joined suction pipe (2) allows to increase the concentration of the impurities in the mixture transferred, increasing the efficiency.
  • the float (7) is characterized by a body which may have one or more cameras in a communicant or independent way among themselves Each camera has a nozzle (11), with a removable stopper, whereby water can be additioned or removed allowing a fine adjustment on the position of its floating line.
  • the piece (4) is fitted at the support (8) of the float (7), by nozzle (6), in a removable and adjustable way
  • the float (7), by support (8), allows to place the nozzle (6) in the required position, stabilizing this nozzle (6) in this position which defines the thickness of the surface liquid.
  • the position of the nozzle (6) stays unalterable in relation to aerial liquid surface by action of the float (7) and by a clearance between the pieces (3) and (4) which are fitted into each other
  • the clearance which may be in a range from tenth part of milimeter up to few milimeters allows a relative vertical movement, upward and downward, between the pieces (3) and (4), in each device individualy
  • a seal (not shown) which may be, for example, a rubber ring or another mean of sealing to avoid liquid enters from bottom through the clearance when exist interest for increasing the concentration of the impurities in the mixture transferred.
  • a seal (not shown) which may be, for example, a rubber ring or another mean of sealing to avoid liquid enters from bottom through the clearance when exist interest for increasing the concentration of the impurities in the mixture transferred.
  • the suction pipe (2) may be connected in a rigid or flexible way to a pump (not shown) and said suction pipe (2) is positioned below of the water surface in a determined depth and in this position the suction pipe (2) may be supported and stabilized in relation to water surface by action of floats (not shown) which are linked to suction pipe (2) by cables, in a removable way.
  • a check net (not shown) may be installed at the nozzle (1 ) to avoid undesired matter enters from the bottom.
  • An alternative for removing spilt oil accumulated at the margin, for example of a bay, is to replace one or more floats (7) by flexible hoses connected to nozzles (6) and then take them up to the place of removing, without high points for guaranteeing a continuous fall, by gravity, of the floating oil through the openning extremity adequatly positioned.
  • the nozzles (6) may be changed in their perimeters (FIG.7 and FIG.8) for increasing the rate of flow of the contribution through these nozzles (6) and promoting a decrease of the quantity of pieces (3) and (4).
  • the limit of the perimeter of the nozzle (6) is function of the thickness of the surface fluid and of the transversal section area of the piece (3).
  • the present arrangement may be connected to pump which may be installed for example on a ship, barge or another kind of boat or, also, at the margin of a lake or river, by a rigid or flexible pipe depending upon the operational and atmospherical conditions.
  • pump which may be installed for example on a ship, barge or another kind of boat or, also, at the margin of a lake or river, by a rigid or flexible pipe depending upon the operational and atmospherical conditions.
  • a device able to remove simultaneously impurities from water surface, means places and bottom surface of swimming pool.
  • the removing of the impurities from the water surface of swimming pools is amplly executed by human effort and based on manual procedure using tools for removing such impurities.
  • Various devices and methods have been suggested for removing impurities from the swimming pool. Some devices which have been used for removing impurities of the aerial water surface in swimming pools are fitted at the structure and the level of water is previously defined not allowing operational flexibility. Others devices are complexes, expensives and have no practical effect.
  • the nozzle (6) (FIG.1) is positioned right below of the water surface and receives the surface water which hauls the impurities contained in it and said surface water is transferred to the swimming pool filtering system where such impurities are separated from water.
  • the clearance between the piece (3) and piece (4) allows a little entrance of rate of flow of water from means places of the swimming pool and allows a necessary relative vertical movement, upward and downward, between themselves independently of the bottom configuration and of the water level.
  • the rate of flow which enters through the clearance is little when in comparision with the rates of flow which enter through the nozzles ( 1 ) and (6)
  • the rate of flow which enters through the clearance does not cause significant diminution of ef ⁇ ciency in the removing of the impurities from the bottom neither about the cleaning of the aerial water surface.
  • the present device may be positioned at some useful place of the swimming pool, being an innovation in comparision with devices (skimmers) fitted in a predetermined point at the swimming pool.
  • the pump is specified to operate with a determined rate of flow (Q)
  • a rate of flow (Qe) enters from the bottom through the nozzle (1)
  • a rate of flow (Qs) enters from the water surface through the nozzle (6)
  • a rate of flow (Qf) enters from means places through the clearance between the pieces (3) and (4)
  • Patent Number GB 2,258,825. A/S FRAMNAE MEK VAERKSTD, Patent Number FR 2,358,514, Ruston, Patent Number US 3.217.886, Perry, Patent Number GB 2,264,043,
  • FIG.l is a sectional view and shows a set of device.
  • FIG.2 is a perspective view of the piece (4)
  • FIG.3 is a perspective view and shows part of device for using in swimming pool
  • FIG.4 is a plan view and shows the flow lines of the liquid surface when the device is in operation.
  • FIG.5 is a side view and shows a arrangement comprising a plurality of devices disposed in a serial form.
  • FIG.6, FIG 7 and FIG 8 are illustrative drawings
  • the present invention is not intended to be limited to said applications and may be associated with anothers devices like, for example, containment barrier
  • the arrangement (FIG 5) may be made from any suitable material, for example metal, plastic or similar and its specification about diameter, lenght and amount of pieces is function of the rate of operation flow specified and of the place with its useful depth and operational condition
  • the present invention can be produced at a relatively very low cost
  • the present invention can operate with a continuous sucking without necessity of regulating the flow rate of liquid pumped
  • the present arrangement may be improved using devices for seting in motion and controlling for directed movement

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Devices For Medical Bathing And Washing (AREA)
  • Cleaning Or Clearing Of The Surface Of Open Water (AREA)
  • Cleaning Or Drying Semiconductors (AREA)

Abstract

The present invention refers to an arrangement able to remove the impurities from a liquid surface. The impurities are hauled by surface liquid which is transferred to suction pipe (2) through one or various devices (Fig. 5) disposed in a serial, parallel or another geometric or irregular form. The haulage of the impurities from liquid surface occurs because the pump causes a low pressure zone which remains throughout suction pipe (2) and pieces (3 and 4), causing a changing level of the liquid inside all pieces (4). This changing level causes continuous fall, by gravity, of the surface liquid with impurities in it into all the pieces (4) through the nozzles (6), and from suction pipe (2) said surface liquid is transferred, for example to filtering system in case of solids in suspension, or to separator system in case of immiscible fluids, or to processing.

Description

Patent Application "ARRANGEMENT FOR CLEANING A LIQUID SURFACE REGION"
Field of the Invention
The present invention refers to an apparatus for cleaning a liquid surface region Bases of the Invention
The present invention refers to an arrangement (FIG 5) able to remove impurities from a liquid surface region
Conventional methods of removing floating impurities from water surface, oil for example. include using of scrapers, absorbent material and another device for recovering oil from water surface and then pumping the oil, normally with a limited rate of flow, into the containers or equipments for allowing to separate oil from water, or for delivering it for processing Such methods or equipments may be expensives and complexes, and may have low efficiency and may require significant manpower and time-consuming for assembling or operating The object of the present invention is to remove the impurities from liquid surface The impurities are hauled and transferred into the suction pipe (2) by one or a plurality of devices (FIG 5) which are disposed in a serial, parallel or another geometrical or irregular form
The haulage of the impurities from liquid surface occurs because the pump which may be installed, for example on a ship or at a margin of a river, causes a low pressure zone at the nozzle (1 ) wherethrough bottom liquid enters Such a low pressure remains throughout suction pipe (2) The diminution of pressure also occurs throughout all the pieces (3) and
(4) causing a changing level of the liquid inside all the pieces (4) This changing level causes continuous fall, by gravity, of the surface liquid with impurities, into all the pieces (4) through the nozzles (6) (FIG 4) This surface liquid hauls the impurities contained in it and then surface liquid is transferred into the suction pipe (2) The surface liquid which may be water, oil or a mixture of oil and water, may suffer some adjustment in its thickness independently of the capacity of the pump
The rates of flow of the fluids mixture in the suction pipe (2) are as minors as nearest to nozzle (1) For instance the sector (I) (FIG 6) of the suction pipe (2) presents a rate of flow
(QI) equal addition rate of flow (QII) and rate of flow (QcII) Otherwise, QI = QII + QcII
Also QII = QIII + QcIII, and so on Representing the sectors by I, II, III, .. up to N, we have QI > QII > QIII > > QN, where QN tends to be zero
From suction pipe (2) the surface liquid with impurities contained in it goes, for example to filtering system in case of solids in suspension, or to separator system in case of immiscible fluids, or to processing.
The use of various devices (FIG 5) joined suction pipe (2) allows to increase the concentration of the impurities in the mixture transferred, increasing the efficiency. The float (7) is characterized by a body which may have one or more cameras in a communicant or independent way among themselves Each camera has a nozzle (11), with a removable stopper, whereby water can be additioned or removed allowing a fine adjustment on the position of its floating line.
The piece (4) is fitted at the support (8) of the float (7), by nozzle (6), in a removable and adjustable way The float (7), by support (8), allows to place the nozzle (6) in the required position, stabilizing this nozzle (6) in this position which defines the thickness of the surface liquid. The position of the nozzle (6) stays unalterable in relation to aerial liquid surface by action of the float (7) and by a clearance between the pieces (3) and (4) which are fitted into each other The clearance which may be in a range from tenth part of milimeter up to few milimeters allows a relative vertical movement, upward and downward, between the pieces (3) and (4), in each device individualy
The relative internal and external position of the pieces (3) and (4) may be changed between themselves.
Between the pieces (3) and (4) may be installed a seal (not shown) which may be, for example, a rubber ring or another mean of sealing to avoid liquid enters from bottom through the clearance when exist interest for increasing the concentration of the impurities in the mixture transferred. In case of specification of the arrangement for middle or hight rates of flow and when there is no seal installed and there is a clearance between the pieces (3) and (4) in a range from tenth part of milimeter up to few milimeters, the loss of efficiency for removing impurities from water surface is not significant The suction pipe (2) may be connected in a rigid or flexible way to a pump (not shown) and said suction pipe (2) is positioned below of the water surface in a determined depth and in this position the suction pipe (2) may be supported and stabilized in relation to water surface by action of floats (not shown) which are linked to suction pipe (2) by cables, in a removable way.
A check net (not shown) may be installed at the nozzle (1 ) to avoid undesired matter enters from the bottom. An alternative for removing spilt oil accumulated at the margin, for example of a bay, is to replace one or more floats (7) by flexible hoses connected to nozzles (6) and then take them up to the place of removing, without high points for guaranteeing a continuous fall, by gravity, of the floating oil through the openning extremity adequatly positioned. When exist a very thin surface oil and this arrangement involve a large amount of pieces (3) and (4), the nozzles (6) may be changed in their perimeters (FIG.7 and FIG.8) for increasing the rate of flow of the contribution through these nozzles (6) and promoting a decrease of the quantity of pieces (3) and (4).
In order to obtain practical effect, the limit of the perimeter of the nozzle (6) is function of the thickness of the surface fluid and of the transversal section area of the piece (3). The present arrangement may be connected to pump which may be installed for example on a ship, barge or another kind of boat or, also, at the margin of a lake or river, by a rigid or flexible pipe depending upon the operational and atmospherical conditions. A particular utilization is possible within the scope of the invention. For example, a device (FIG.1 ) able to remove simultaneously impurities from water surface, means places and bottom surface of swimming pool.
The removing of the impurities from the water surface of swimming pools is amplly executed by human effort and based on manual procedure using tools for removing such impurities. Various devices and methods have been suggested for removing impurities from the swimming pool. Some devices which have been used for removing impurities of the aerial water surface in swimming pools are fitted at the structure and the level of water is previously defined not allowing operational flexibility. Others devices are complexes, expensives and have no practical effect.
The nozzle (6) (FIG.1) is positioned right below of the water surface and receives the surface water which hauls the impurities contained in it and said surface water is transferred to the swimming pool filtering system where such impurities are separated from water. The clearance between the piece (3) and piece (4) allows a little entrance of rate of flow of water from means places of the swimming pool and allows a necessary relative vertical movement, upward and downward, between themselves independently of the bottom configuration and of the water level. The rate of flow which enters through the clearance is little when in comparision with the rates of flow which enter through the nozzles ( 1 ) and (6) The rate of flow which enters through the clearance does not cause significant diminution of efϊciency in the removing of the impurities from the bottom neither about the cleaning of the aerial water surface.
The present device (FIG 1 ) may be positioned at some useful place of the swimming pool, being an innovation in comparision with devices (skimmers) fitted in a predetermined point at the swimming pool.
In the swimming pool filtering system, the pump is specified to operate with a determined rate of flow (Q) A rate of flow (Qe) enters from the bottom through the nozzle (1) A rate of flow (Qs) enters from the water surface through the nozzle (6) A rate of flow (Qf) enters from means places through the clearance between the pieces (3) and (4)
In a cleaning of the bottom surface, means places and aerial water surface of a swimming pool, occurs the relation Q = Qe + Qs + Qf
Illustrative of methods and equipments is Olsen. Patent Number DE 2,232,509, Shaa'ban,
Patent Number GB 2,258,825. A/S FRAMNAE MEK VAERKSTD, Patent Number FR 2,358,514, Ruston, Patent Number US 3.217.886, Perry, Patent Number GB 2,264,043,
Schuman et al.. Patent Number US 5,338,446. Julien, Patent Number FR 2,714,099 and
Pappalardo, Patent Number FR 2,781,243
Description of drawings
FIG.l is a sectional view and shows a set of device. FIG.2 is a perspective view of the piece (4)
FIG.3 is a perspective view and shows part of device for using in swimming pool
FIG.4 is a plan view and shows the flow lines of the liquid surface when the device is in operation.
FIG.5 is a side view and shows a arrangement comprising a plurality of devices disposed in a serial form.
FIG.6, FIG 7 and FIG 8 are illustrative drawings The present invention is not intended to be limited to said applications and may be associated with anothers devices like, for example, containment barrier The arrangement (FIG 5) may be made from any suitable material, for example metal, plastic or similar and its specification about diameter, lenght and amount of pieces is function of the rate of operation flow specified and of the place with its useful depth and operational condition
The present invention can be produced at a relatively very low cost
The present invention can operate with a continuous sucking without necessity of regulating the flow rate of liquid pumped In special condition the present arrangement may be improved using devices for seting in motion and controlling for directed movement

Claims

1- Arrangement for removing floating impurities from a liquid surface, comprising a suction pipe (2) and one or various devices which may be disposed in a serial, parallel or another geometric or irregular form and said devices are constituted individualy by a float (7), a support (8), a piece (3) and a piece (4) which said pieces (3) and (4) can be fitted into each other and can have a relative vertical movement, upward and downward, between themselves.
2- Arrangement defined in claim 1, comprising a suction pipe (2) which is constituted by one or various derivations which are the pieces (3), and said suction pipe (2) may be connected in a rigid or flexible way to a pump (not shown) and is positioned below of the liquid surface in a determined depth, and in this position the suction pipe (2) may be supported and stabilized in relation to liquid surface by action of floats (not shown) which are linked to suction pipe (2) by cables, in a removable way.
3- Arrangement defined in claim 1, comprising a suction pipe (2) which has in its embodiment the nozzle (1) wherethrough bottom liquid enters.
4- Arrangement defined in claim 1, comprising the pieces (3) and pieces (4) which have a clearance between themselves in a range from tenth part of milimeter up to few milimeters.
5- Arrangement defined in claim 1. comprising the pieces (3) and pieces (4) which may have between themselves a seal (not shown) which may be. for example, a rubber ring or another mean of sealing, and said seal still can allow a relative vertical movement, upward and downward, between the piece (3) and piece (4).
6- Arrangement defined in claim 1, comprising the pieces (4) which are fitted at the support (8) of the floats (7), by nozzle (6), in a removable and adjustable way. 7- Arrangement defined in claim 1 , comprising a float (7) which is constituted by a body having one or more cameras which have individualy a nozzle (11) with a stopper, in a removable way, for adding or removing liquid allowing a fine adjustment on the floating line of the float.
8- Arrangement defined in claim 7, comprising a float (7) which is constituted by support (8) which allows to place the nozzle (6) in the required position, stabilizing this nozzle
(6) in this position which defines the thickness of the surface liquid, said surface liquid which falls continuously, by gravity, into the piece (4), through the nozzle (6). - Process for removing floating impurities from liquid surface using the arrangement defined in claim 1, characterized by utilization of the diminution of the internal pressure throughout suction pipe (2) and. also throughout pieces (3) and (4), said diminution of the internal pressure caused by operation of the pump. 0- Process defined in claim 9, characterized by diminution of the pressure inside pieces (4) which causes a changing of the liquid level inside pieces (4), causing a continuous fall, by gravity, of the surface liquid into the pieces (4) through the nozzles (6)1- Process defined in claim 10, characterized by a surface liquid which hauls the impurities contained in it and said surface liquid is transferred to suction pipe (2) through the pieces (3) 2- Process defined in claim 1 1, characterized by impurities which from suction pipe (2) are transferred continuously, for example to filtering system in case of solids in suspension, or to separator system in case of immiscible fluids, or to processing without necessity of regulating the flow rate of liquid pumped 3-Process defined in claim 1 1, characterized by various contributions of rate of flow of the surface liquid, through the nozzles (6), which add themselves throughout suction pipe (2), in the same direction of the flow, up to the limit of the rate of flow specified to pump, and said contributions of rate of flow allow to increase the concentration of the impurities in the mixture transferred
PCT/BR2001/000010 2000-02-22 2001-01-25 Arrangement for cleaning a liquid surface region WO2001063053A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BRPI0000655-6 2000-02-22
BR0000655-6A BR0000655C1 (en) 2000-02-22 2000-02-22 Device for cleaning the surface of the liquid interface and air, in the open
BRCI0000655-6 2000-04-03

Publications (1)

Publication Number Publication Date
WO2001063053A1 true WO2001063053A1 (en) 2001-08-30

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PCT/BR2001/000010 WO2001063053A1 (en) 2000-02-22 2001-01-25 Arrangement for cleaning a liquid surface region

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WO (1) WO2001063053A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10808370B1 (en) * 2016-04-05 2020-10-20 Robert Marshall Campbell Oil spill clean-up and recovery systems for marine vessels

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217886A (en) 1962-08-27 1965-11-16 Edward W Ruston Automatic swimming pool cleaner
FR1522156A (en) * 1967-05-03 1968-04-19 Pickup device by pumping fuel oil spilled on the water
DE2232509A1 (en) 1972-07-03 1974-01-24 Martin F Olsen Recovering floating oil - using collection float with ballast chamber supplied by level responsive valve
DE2617793A1 (en) * 1976-04-23 1977-11-03 Douglas John Gore Floating skimmer for cleaning surface of liq. - has slotted housing with floats and hinged weir adjustable by hand
FR2358514A1 (en) 1976-07-16 1978-02-10 Framnae Mek Vaerksted As Oil slick collector used in rough seas - has vertical suction pipe extending through submerged horizontal platform beneath oil level
DE2657488A1 (en) * 1976-12-18 1978-06-22 Schulze Oswald Kg Water extraction equipment for reservoir - has overflow pipe supported by float and guided on stand-pipe
GB2258825A (en) 1991-08-14 1993-02-24 Ban Mohamed Isa Shaa Skimming device for recovering floating oil
GB2264043A (en) 1992-02-17 1993-08-18 Bradley Perry Cleaning ponds
US5338446A (en) 1993-02-12 1994-08-16 Rainbow Lifegard Products, Inc. Filter unit for in-line use in a pool vacuum hose
FR2714099A1 (en) 1993-12-21 1995-06-23 Julien Bernard Removal of coarse waste such as leaves from a swimming pool
WO1997032087A1 (en) * 1996-03-01 1997-09-04 Alfa Laval Ab A device for skimming a surface layer of a liquid
FR2781243A1 (en) 1998-07-20 2000-01-21 Jean Pierre Pappalardo Robot for cleaning swimming pools comprises powered vehicle on wheels or tracks which carries filtering equipment and moves according to a preset program in relation to a fixed reference

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217886A (en) 1962-08-27 1965-11-16 Edward W Ruston Automatic swimming pool cleaner
FR1522156A (en) * 1967-05-03 1968-04-19 Pickup device by pumping fuel oil spilled on the water
DE2232509A1 (en) 1972-07-03 1974-01-24 Martin F Olsen Recovering floating oil - using collection float with ballast chamber supplied by level responsive valve
DE2617793A1 (en) * 1976-04-23 1977-11-03 Douglas John Gore Floating skimmer for cleaning surface of liq. - has slotted housing with floats and hinged weir adjustable by hand
FR2358514A1 (en) 1976-07-16 1978-02-10 Framnae Mek Vaerksted As Oil slick collector used in rough seas - has vertical suction pipe extending through submerged horizontal platform beneath oil level
DE2657488A1 (en) * 1976-12-18 1978-06-22 Schulze Oswald Kg Water extraction equipment for reservoir - has overflow pipe supported by float and guided on stand-pipe
GB2258825A (en) 1991-08-14 1993-02-24 Ban Mohamed Isa Shaa Skimming device for recovering floating oil
GB2264043A (en) 1992-02-17 1993-08-18 Bradley Perry Cleaning ponds
US5338446A (en) 1993-02-12 1994-08-16 Rainbow Lifegard Products, Inc. Filter unit for in-line use in a pool vacuum hose
FR2714099A1 (en) 1993-12-21 1995-06-23 Julien Bernard Removal of coarse waste such as leaves from a swimming pool
WO1997032087A1 (en) * 1996-03-01 1997-09-04 Alfa Laval Ab A device for skimming a surface layer of a liquid
FR2781243A1 (en) 1998-07-20 2000-01-21 Jean Pierre Pappalardo Robot for cleaning swimming pools comprises powered vehicle on wheels or tracks which carries filtering equipment and moves according to a preset program in relation to a fixed reference

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10808370B1 (en) * 2016-04-05 2020-10-20 Robert Marshall Campbell Oil spill clean-up and recovery systems for marine vessels
US11384500B1 (en) * 2016-04-05 2022-07-12 Robert Marshall Campbell Oil spill clean-up and recovery systems for marine vessels

Also Published As

Publication number Publication date
BR0000655C1 (en) 2002-05-14
BR0000655A (en) 2001-10-09

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