EP2310258B1 - System to protect objects from growth on surfaces submerged into water - Google Patents

System to protect objects from growth on surfaces submerged into water Download PDF

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Publication number
EP2310258B1
EP2310258B1 EP09732276.2A EP09732276A EP2310258B1 EP 2310258 B1 EP2310258 B1 EP 2310258B1 EP 09732276 A EP09732276 A EP 09732276A EP 2310258 B1 EP2310258 B1 EP 2310258B1
Authority
EP
European Patent Office
Prior art keywords
cover
water
submerged
organisms
growth
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.)
Active
Application number
EP09732276.2A
Other languages
German (de)
French (fr)
Other versions
EP2310258A1 (en
EP2310258A4 (en
Inventor
Bror-Erik Eriksson
Jan Jeppsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cleanboatprotector Sweden AB
Original Assignee
Cleanboatprotector Sweden AB
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
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Application filed by Cleanboatprotector Sweden AB filed Critical Cleanboatprotector Sweden AB
Publication of EP2310258A1 publication Critical patent/EP2310258A1/en
Publication of EP2310258A4 publication Critical patent/EP2310258A4/en
Application granted granted Critical
Publication of EP2310258B1 publication Critical patent/EP2310258B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B59/00—Hull protection specially adapted for vessels; Cleaning devices specially adapted for vessels
    • B63B59/04—Preventing hull fouling
    • B63B59/045—Preventing hull fouling by wrapping the submerged hull or part of the hull with an impermeable sheet

Definitions

  • the invention concerns a device for protecting objects, such as boats and tools, from organisms that grow and reproduce on object surfaces submerged into water.
  • the invention described below are intended to effectively hinder the growth of water organisms on object surfaces submerged into water without any material containing poisonous substances that can leak out into the water.
  • the claimed device is intended to protect the bottom surfaces of boats or other object surfaces submerged into water from growth of algae or sea acorns.
  • the boat or the object should be driven or moved up upon a cover which has a lower density than water and that is attached to a bridge.
  • the density lower than water can be achieved by selecting a proper material or by attaching air pockets in the cover.
  • the material suited for the cover is PVC, polyethylene, or polypropylene that are armed with polyester fibres.
  • a preferred solution is to utilize a PVC cover with a thickness of 0.2 to 0.8 mm armed with polyester fibers for example the trademarks SCANPLAN 5140PF (Scantarp, Kuopio, Finland) or NAIZIL PS ADR PHTALATE FREE (NAIZIL INC., Canada). Both these two materials are phthalate free.
  • This cover is combined for example by welding with foam of PVC (Expanancel®).
  • the foam contains microspheres, in which gas is encapsulated and this result in a lifting force to the cover. The gas filled spheres are completely closed and therefore they cannot be filled with water.
  • the PVC foam has a thickness of about 4 mm (interval 2 to 8 mm).
  • An example of material is also polyethylene foam of trademark Alveolit TA4000 (DAFA A/S, Denmark),
  • Another feature of the cover is to significantly reduce the amount of light that is transmitted through the cover into the water. This can be achieved by adding additives to PVC.
  • a preferred colour is the trademark F4050-R90B, which is relatively dark blue and suitable for the environment and results in a pleasant blue colour. This is important since the cover is attached to a bridge. Other colours can also be used. Since the cover has a density lower than water it is floating, and when the boat is driven onto it the cover will closely attach to the surface of the boat. This will reduce the amount of surface water around the boat and reduce the possibility for the cyprid larva to settle at the surface. Furthermore the light will be significantly reduced which decreases the possibilities for algae and sea acorns, to develop and to reproduce.
  • the cover is supposed to be attached to the bridge but it could of course also be attached to the boat by preset attachment points. Furthermore it has been proposed that the boat is moved or driven to the cover, but of course it is also possible for the cover to be drawn under the boat or the tool and then be attached by ropes on either the bridge or the object.
  • the cover Since the cover has a lower density or the cover contains air cushions, the object will push down the cover and the cover will attach closely to the surface of the object.
  • the cover can have a slit in order to allow for a deep keel that will not be enclosed by the cover in difference to the rest of the submerged boat.
  • the choice of material for the cover is made in such a way that it does not release any poisonous substances into the water, see examples above. It is also possible to use various types of natural textiles such as cotton, linen, hemp, cellulose fibres or different types of synthetic substances.
  • the outer borders of the cover could contain perforated channels so that air could be pumped through these holes in wintertime to keep the sides of the boat or tool ice free.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Catching Or Destruction (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Description

  • The invention concerns a device for protecting objects, such as boats and tools, from organisms that grow and reproduce on object surfaces submerged into water.
    • Background
  • It is known from literature that ships and tools which are submerged in water will have growth of organisms on their submerged surfaces and this causes great problems. Sea acorns, algae and mussels reduce speed and possibility to manoeuvre the ship and they also increase the consumption of fuel (Ref. 1 and 2). Also functions of tools can be drastically altered by growth of sea acorns, algae and mussels or other water organisms. In order to avoid these problems various solutions have been presented. A system consisting of a belt which rubs off algae and other deposits from the surface of a boat is presented in the patent US 4,395,966 . The purpose is to purely mechanically rub away the deposits. Another system is presented in the US patent 6,443,085 which utilizes a cover with holes of a predetermined size which is said to protect from growth of organisms on subjects submerged in water such as a boat. The size of the holes is completely vital for the function, according to the patent.
  • The use of a cover which has a lower density than water or which has air cushions is described in SE 527601. This device utilizes the movements between the boat and the cover, and the cover must have friction enough to remove the deposits. Another application WO 01/81167 A1 describes a cover for inhibiting the fouling for a vessel. The principle of this system is a cover resting in a vertical position. In order to achieve this, the covers have a density higher than water in the lower parts. To attach the cover to the boat it is necessary to use ropes and/or special tools to keep it in place.
  • Further background art is described in the references 3, 4 and 5. In the reference 3 "Settlingsval hos havstulpaner" the first step in the settling cycle of the sea acorn is described. The first step is the formation of the nauplius larv. The next step in the development is the forming of a cyprid larv which search for a suitable surface for settling. Signals from the environment can affect the choice of attaching or not attaching on the surface. Such factors are for example water flow close to the settling surface, light conditions, and the structure of the settling surface. When the larva finds a suitable surface is will produce protein glue that cures in water. The glue is very strong and it is very difficult to scrub off the surface. The final step is that the larva evolves into a fully developed sea acorn. Sea acorns can normally grow down to 6 m of water depth, deeper down the light conditions are not acceptable.
  • Even other water organisms like algae need light to develop and reproduce. Today different kinds of colours for painting the outer bottom of the boat are used to protect the surface from growth of water organisms. However these colours release large portions of poisonous substances which have very serious consequences on the water environment.
  • The invention described below are intended to effectively hinder the growth of water organisms on object surfaces submerged into water without any material containing poisonous substances that can leak out into the water.
    • Description
  • The claimed device is intended to protect the bottom surfaces of boats or other object surfaces submerged into water from growth of algae or sea acorns. The boat or the object should be driven or moved up upon a cover which has a lower density than water and that is attached to a bridge. The density lower than water can be achieved by selecting a proper material or by attaching air pockets in the cover. According to the invention, the material suited for the cover is PVC, polyethylene, or polypropylene that are armed with polyester fibres. A preferred solution is to utilize a PVC cover with a thickness of 0.2 to 0.8 mm armed with polyester fibers for example the trademarks SCANPLAN 5140PF (Scantarp, Kuopio, Finland) or NAIZIL PS ADR PHTALATE FREE (NAIZIL INC., Canada). Both these two materials are phthalate free. This cover is combined for example by welding with foam of PVC (Expanancel®). The foam contains microspheres, in which gas is encapsulated and this result in a lifting force to the cover. The gas filled spheres are completely closed and therefore they cannot be filled with water. The PVC foam has a thickness of about 4 mm (interval 2 to 8 mm). An example of material is also polyethylene foam of trademark Alveolit TA4000 (DAFA A/S, Denmark),
  • Another feature of the cover is to significantly reduce the amount of light that is transmitted through the cover into the water. This can be achieved by adding additives to PVC. A preferred colour is the trademark F4050-R90B, which is relatively dark blue and suitable for the environment and results in a pleasant blue colour. This is important since the cover is attached to a bridge. Other colours can also be used. Since the cover has a density lower than water it is floating, and when the boat is driven onto it the cover will closely attach to the surface of the boat. This will reduce the amount of surface water around the boat and reduce the possibility for the cyprid larva to settle at the surface. Furthermore the light will be significantly reduced which decreases the possibilities for algae and sea acorns, to develop and to reproduce. In this example the cover is supposed to be attached to the bridge but it could of course also be attached to the boat by preset attachment points. Furthermore it has been proposed that the boat is moved or driven to the cover, but of course it is also possible for the cover to be drawn under the boat or the tool and then be attached by ropes on either the bridge or the object.
  • Since the cover has a lower density or the cover contains air cushions, the object will push down the cover and the cover will attach closely to the surface of the object. In another preferred example, the cover can have a slit in order to allow for a deep keel that will not be enclosed by the cover in difference to the rest of the submerged boat.
  • The choice of material for the cover is made in such a way that it does not release any poisonous substances into the water, see examples above. It is also possible to use various types of natural textiles such as cotton, linen, hemp, cellulose fibres or different types of synthetic substances.
  • In another preferred design the outer borders of the cover could contain perforated channels so that air could be pumped through these holes in wintertime to keep the sides of the boat or tool ice free.
  • References:
    1. 1. Samhällets inverkan på Östersjön. J. Bohm. Luleå tekniska universitet. Institutet for Tillämpad kemi och geovetenskap. 2006.
    2. 2. Marin påväxt - ett svårlöst problem. L.Mårtensson. Zoofysiologi. Göteborgs universitet. 2005.
    3. 3. Settlingsval hos havstulpaner. Projektarbete. J.Winell. D.Hammenstig. Gullmarsgymnasiet. 2005-04-05.
    4. 4. Cypridlarvers. Balanus improvisus. Beteende och settlingsintensitet i strömmande vatten. C. Lagerholm. Inst. for Marin Ekologi. Tjärnö. Marin Biologiska Laboratorie. 2000.
    5. 5. "Nu är det dags att tvätta båtens botten". Länsstyrelsen i Stockholm. Havstulpanprojektet 2007-11-29.

Claims (5)

  1. A device for protecting objects from organisms that grow and reproduce on object surfaces submerged into water, said device comprising a cover which has a density lower than water or which is provided with encapsulated air cushions, characterized in that the cover is arranged to cover the surfaces submerged into water and comprises a textile which is not permeable by light and which is made of one of: PVC, polyethylene or polypropylene, and which is armed with polyester fibres and joined with a foam containing closed microspheres, said microspheres being so designed that the cover will, in use, physically attach closely to the surfaces submerged into water, thereby hindering formation of a bio-film on said surfaces, which film could be the base for other organisms like algae, mussels and water acorns to settle on said surfaces of the objects.
  2. The device according to claim 1, wherein the cover consists of a textile joined with a foam of polyvinylchloride or polyethylene.
  3. The device according to claim 1 or 2, wherein the cover consists of a dark coloured textile to prevent transmission of light.
  4. The device according to any of claims 1-3, wherein the cover is designed with a slit for boats with a deep keel.
  5. The device according to any of claims 1-4, wherein perforated air channels are enclosed on each side of the cover.
EP09732276.2A 2008-04-17 2009-04-14 System to protect objects from growth on surfaces submerged into water Active EP2310258B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0800879A SE532546C2 (en) 2008-04-17 2008-04-17 Device for preventing the growth of objects in water
PCT/SE2009/000187 WO2009128761A1 (en) 2008-04-17 2009-04-14 System to protect objects from growth on surfaces submerged into water

Publications (3)

Publication Number Publication Date
EP2310258A1 EP2310258A1 (en) 2011-04-20
EP2310258A4 EP2310258A4 (en) 2017-02-22
EP2310258B1 true EP2310258B1 (en) 2017-08-09

Family

ID=41199321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09732276.2A Active EP2310258B1 (en) 2008-04-17 2009-04-14 System to protect objects from growth on surfaces submerged into water

Country Status (4)

Country Link
EP (1) EP2310258B1 (en)
NO (1) NO2310258T3 (en)
SE (1) SE532546C2 (en)
WO (1) WO2009128761A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022096417A1 (en) 2020-11-06 2022-05-12 Marine Pro As An anti-fouling protective cover

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE544224C2 (en) * 2020-10-02 2022-03-08 Ekeroeds Utvecklings Ab Hull protection device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5465676A (en) 1995-03-24 1995-11-14 Falcaro; Steven M. Barnacle shield
JP2001239989A (en) 2000-02-29 2001-09-04 Molten Corp Protector for hull
US20030219565A1 (en) 2001-12-07 2003-11-27 Gary Heartsfield Mat apparatus and method
US20060116039A1 (en) 2004-12-01 2006-06-01 Pole Robert Iii Floating water mat

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4395966A (en) 1981-07-30 1983-08-02 Murphy Kent L Boat hull scrubber
JPS59128095A (en) * 1983-01-06 1984-07-24 Tadao Fujimoto Protector for ship's bottom
FR2610284B3 (en) * 1987-02-02 1991-10-04 Piana Georges DEVICE FOR PROTECTING THE HULLS OF PLEASURE VESSELS DURING THEIR WINTERIZING IN FLOAT
US6152061A (en) * 1999-07-20 2000-11-28 Perez-Collazo; Eduardo Floating collapsible hull protector against marine growth
JP2001128612A (en) 1999-11-05 2001-05-15 Kaoru Akahani Method for preventing adhesion of aquatic organism to underground structure
DE60101847T2 (en) 2000-04-27 2004-11-04 Olsen Design Aps Mooring on a water surface with elements for mooring a watercraft
JP2003104285A (en) * 2001-09-28 2003-04-09 Yoshiaki Matsuno Ship bottom anti-fouling sheet structure for small ship
SE527601C2 (en) 2002-10-14 2006-04-25 Bjoern Lindberg Anti fouling device for boat hull, comprises mat or cloth made from low density material or containing air cushions or pockets

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5465676A (en) 1995-03-24 1995-11-14 Falcaro; Steven M. Barnacle shield
JP2001239989A (en) 2000-02-29 2001-09-04 Molten Corp Protector for hull
US20030219565A1 (en) 2001-12-07 2003-11-27 Gary Heartsfield Mat apparatus and method
US20060116039A1 (en) 2004-12-01 2006-06-01 Pole Robert Iii Floating water mat

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022096417A1 (en) 2020-11-06 2022-05-12 Marine Pro As An anti-fouling protective cover

Also Published As

Publication number Publication date
EP2310258A1 (en) 2011-04-20
SE532546C2 (en) 2010-02-16
SE0800879L (en) 2009-10-18
NO2310258T3 (en) 2018-01-06
WO2009128761A1 (en) 2009-10-22
EP2310258A4 (en) 2017-02-22

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