NL2021312B1 - Fishing assembly, method for fishing and conversion kit - Google Patents

Fishing assembly, method for fishing and conversion kit Download PDF

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Publication number
NL2021312B1
NL2021312B1 NL2021312A NL2021312A NL2021312B1 NL 2021312 B1 NL2021312 B1 NL 2021312B1 NL 2021312 A NL2021312 A NL 2021312A NL 2021312 A NL2021312 A NL 2021312A NL 2021312 B1 NL2021312 B1 NL 2021312B1
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Netherlands
Prior art keywords
air
assembly
ground surface
tow
air outlet
Prior art date
Application number
NL2021312A
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Dutch (nl)
Inventor
Standaart Pieter
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Standaart Pieter
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Priority to NL2021312A priority Critical patent/NL2021312B1/en
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K79/00—Methods or means of catching fish in bulk not provided for in groups A01K69/00 - A01K77/00, e.g. fish pumps; Detection of fish; Whale fishery
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K73/00—Drawn nets
    • A01K73/02—Trawling nets
    • A01K73/04—Devices for spreading or positioning, e.g. control thereof
    • A01K73/05—Devices for spreading or positioning, e.g. control thereof for vertical sheering
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K73/00—Drawn nets
    • A01K73/02—Trawling nets
    • A01K73/04—Devices for spreading or positioning, e.g. control thereof
    • A01K73/053—Ground-line rollers

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Mechanical Means For Catching Fish (AREA)

Abstract

The invention relates to an assembly for fishing, especially flatfish fishing, the assembly comprising an elongated tow-element that in use of the assembly is moveable along a ground surface, such as a seabed, wherein the tow-element is configured to be connectable with a trawl for catching and retaining fish, and wherein the tow-element is configured to be connectable to a vessel for towing, and the assembly further comprising an air channel for channeling compressed air, the air channel extending from a first end that is connectable to a compressed air supply to a second end and a number of air outlets that are connected to the second end of the air channel and are operatively connected to the elongated tow-element, wherein in use of the assembly the number of air outlets is directed towards the ground surface and is configured for ejecting compressed air towards the ground surface. The invention further relates to a fishing vessel and a method for fishing including the assembly according to the invention and a conversion kit for converting a beam trawl to an assembly according to the invention.

Description

Figure NL2021312B1_D0001
Θ 2021312 ©B1 OCTROOI (2?) Aanvraagnummer: 2021312 (22) Aanvraag ingediend: 16 juli 2018 (51) Int. Cl.:
A01K 79/00 (2018.01) A01K 73/05 (2019.01) A01K
73/053 (2019.01) A01K 75/00 (2019.01) (30) Voorrang:
(G) Aanvraag ingeschreven:
januari 2020 (43) Aanvraag gepubliceerd:
(73) Octrooihouder(s):
Pieter Standaart te Den Burg (72) Uitvinder(s):
Pieter Standaart te Den Burg (74) Gemachtigde:
drs. P.F.H.M. van Someren c.s. te Den Haag
47) Octrooi verleend:
januari 2020 (45) Octrooischrift uitgegeven:
januari 2020 (54) FISHING ASSEMBLY, METHOD FOR FISHING AND CONVERSION KIT (57) The invention relates to an assembly for fishing, especially flatfish fishing, the assembly comprising an elongated tow-element that in use of the assembly is moveable along a ground surface, such as a seabed, wherein the tow-element is configured to be connectable with a trawl for catching and retaining fish, and wherein the tow-element is configured to be connectable to a vessel fortowing, and the assembly further comprising an air channel for channeling compressed air, the air channel extending from a first end that is connectable to a compressed air supply to a second end and a number of air outlets that are connected to the second end of the air channel and are operatively connected to the elongated tow-element, wherein in use of the assembly the number of air outlets is directed towards the ground surface and is configured for ejecting compressed air towards the ground surface.
The invention further relates to a fishing vessel and a method for fishing including the assembly according to the invention and a conversion kit for converting a beam trawl to an assembly according to the invention.
NLB1 2021312
Dit octrooi is verleend ongeacht het bijgevoegde resultaat van het onderzoek naar de stand van de techniek en schriftelijke opinie. Het octrooischrift komt overeen met de oorspronkelijk ingediende stukken.
FISHING ASSEMBLY, METHOD FOR FISHING AND CONVERSION KIT
The invention relates to an assembly for fishing, especially flatfish-fishing, a vessel comprising such an assembly, a method for fishing using such an assembly and a conversion kit for converting existing beam trawls.
Fishing assemblies for fishing for flatfish are known from practice. A known assembly comprises a beam trawl comprising a trawl and a number of tickler chains and so-called Tickle. In use, the beam is drawn along the seabed, while the attached tickler chains drag along and slightly below the seabed to startle the flat fish, allowing them to be caught in the trawl. A disadvantage of this known assembly is that the tickler chains inflict massive damage on the seabed and the seadwelling creatures living on and in the seabed, thus inflicting a high amount of environmental damage. In addition, a huge amount of fuel is required to drag the tickler chains over and through the seabed, thus increasing the cost of fishing.
Another known assembly comprises a beam trawl having a trawl and a number of cables which are provided with insulated electrodes and conductive elements. In use, the beam is drawn along the seabed, while electrical pulses are sent towards (and slightly) into the seabed to startle the flat fish, allowing them to he caught in the trawl. A disadvantage of this known assembly is that it damages other sea-dwelling creatures living in or near the seabed. In addition, smaller and younger flat-fish, which are not sufficiently matured for catch are damaged and/or killed by the electric pulse. Furthermore, the large weight of the electrodes and conductive elements require a significant amount of fuel to he drawn along the seabed.
The invention is aimed at providing an assembly for flat-fish fishing that has no or little adverse environmental impact.
To that end, the invention provides an assembly for fishing, especially flatfish fishing, the assembly comprising an elongated tow-element that in use of the assembly is moveable along a ground surface, such as a seabed, wherein the tow-element is configured to be connectable with a trawl for catching and retaining fish, and wherein the tow-element is configured to be connectable to a vessel for towing, characterized in that the assembly further comprises:
- an air channel for channeling compressed air, the air channel extending from a first end that is connectable to a compressed air supply to a second end; and
- a number of air outlets that are connected to the second end of the air channel and are operatively connected to the elongated tow-element, wherein, in use of the assembly, the number of air outlets is directed towards the ground surface and is configured for ejecting compressed air towards the ground surface.
An advantage of the assembly according to the invention is that it has no or greatly reduced environmental impact due to the fact that the compressed air directed at the ground surface is configured to startle the fish to be caught, while having no or little effect on the ground surface and/or the sea-dwelling creatures in or near the ground surface. As a result, the assembly is highly selective in that it only startles the fish to be caught and does not influence and/or rouse other seadwelling creatures.
Another advantage of the assembly according to the invention is that the weight of the assembly is relatively low, which reduces the fuel consumption requires to tow the assembly along the ground surface. The reduced weight is mainly due to the fact that the means for startling the fish from the seabed in the assembly according to the invention are relatively light compared to the means used in the known assemblies. In the assembly according to the invention only relatively light-weight components such as conduits and air outlets or nozzles for compressed air are required, whereas the known assemblies require heavy components, such as tickle chains and/or electrodes.
Yet another advantage of the assembly according to the invention is that the pressure of the (jets of) compressed air that is ejected from the air outlets can be regulated to account for the specific circumstances of an area. Preferably, the ejection pressure of the compressed air is chosen such that the air jets do not hit the seabed, yet only crate a localized pressure difference directly above the seabed, which is sufficient to rouse the flat-fish to be caught.
Yet another advantage of the assembly according to the invention is that the assembly increases the oxygen levels in the water near the ground surface by injecting the compressed air, thus having a positive effect on the subsea environment in which the assembly is used.
It is noted that the ground surface can be a seabed, river bed or any other ground surface that is suitable for fishing for flat fish and that the terms ground surface, seabed and/or river bed are used interchangeably in this application and are considered to comprise each and all of the abovementioned surfaces.
It is furthermore noted that the air channel may be formed from different materials and/or have different sizes and/or may be configured for different pressures. Preferably, the air channel is formed by an air hose, such as a flexible air hose, or an air conduit that is at least partially flexible.
In an embodiment according to the invention, the tow-element has a length, a width and a thickness, wherein the tow-element is configured to be towed by a vessel, such as a fishing trawler, and wherein the towing direction is substantially perpendicular to the width of the tow-element and the towing direction is collinear with the direction in which the length of the tow-element extends, and wherein the thickness may vary along the length and/or width of the tow-element.
In an embodiment according to the invention, the air channel may at least partially extend within the tow-element and wherein the number of air outlets may be positioned in or on an outer surface of the tow-element, and preferably wherein the number of air outlets may form an integral part of the tow-element.
In a preferred embodiment, at least part of the air channel and the air outlets are integrated with or even integrally manufactured with the tow-element.
An advantage of this embodiment is that the air channel is not provided on an outer side of the tow-element, which leads to a reduced drag resistance during use. Another advantage is that the air channel and the air outlets are less susceptible to malfunctioning due to external influences, thus forming a more robust assembly. In addition, this embodiment provides the advantage that additional control elements that are provided in the air channel and/or air outlets can be at least partially positioned within the tow-element.
In an embodiment according to the invention, the number of air outlets may be positioned along the width of the tow-element, and preferably may be substantially evenly spaced along the width of the tow-element.
An advantage of spacing the air outlets along a width of the tow-element is that the compressed air, preferably in the form of air jets, is directed towards the seabed over substantially the entire width of the tow-element. As a result, the fish over the entire width of the tow-element are roused and the entire width of the tow-element is effectively used for fishing.
In an embodiment according to the invention, at least part of the number of air outlets is moveably connected along the width of the tow-element, wherein the part of the number of air outlets has an unlocked mode in which the outlets are moveable and a locked mode in which the number of air outlets is locked against movement.
An advantage of moveable air outlets is that the assembly can be adapted to specific circumstances at the fishing position. This may for example be adapting the distance over which the fish are roused, or increasing the pressure difference by moving the air outlets closer together.
In an embodiment according to the invention, the air outlets may be air nozzles having an air nozzle diameter, and preferably wherein the air nozzle diameter may be adaptable.
The air outlets are preferably provided as nozzles that are configured to provide a jet of compressed air. Preferably, the nozzle diameter is adaptable to allow the pressure of the compressed air that is provided towards the ground surface, thus accounting for the characteristics of the fishing area, such as differences in composition of the seabed, temperature of the water and/or the composition of the water in the fishing area. Another advantage of having an adaptable nozzle diameter is that the exit pressure of the compressed air (and thus the air jet directed towards the seabed) can be adapted to the distance between the tow-element and the seabed. This may also be provided as an automated system for adapting the distance. The adaptable size of the nozzles can be achieved using various techniques. In a first alternative, the adaptation can be achieved by providing a separate diaphragm that is configured for adapting the diameter of the nozzle. In another alternative, the adaptation is achieved by the use of nozzles having an adaptable nozzle diameter. Other techniques for adapting the nozzle diameter can however also be used.
In an embodiment according to the invention, each of the number of air outlets has an air outlet diameter, wherein the air outlet diameter is in the range of 0.1-7 mm, and preferably is in the range of 0.5 - 5 mm, and more preferably is in the range of 1 - 3 mm.
Having air outlets with a diameter in the range of 0.1 - 7 mm have experimentally proven to be most effective in startling the fish from the seabed without having an adverse effect on the seabed. In other words, by providing a diameter in the abovementioned range, the compressed air ejected from the air outlets does not reach and disturb the seabed, yet creates sufficient pressure differences to startle the fish to be caught.
In an embodiment according to the invention, a distance between the air outlets and the ground surface may be in the range of 5-70 cm, and preferably may be in the range of 10 - 50 cm, and more preferably may be in the range of 20 - 30 cm.
During experiments it is found that a distance between the air outlets and the ground surface is preferably in the range of 5 - 70 cm, wherein a range of 20 - 30 cm is most preferred. This distance allows the compressed air ejected from the air outlets to be sufficient to startle the fish and rouse them from the seabed, whereas it is sufficiently far away to assure that the compressed air ejected from the air outlets does not reach and disturb the seabed.
In an embodiment according to the invention, a pressure difference between the air outlet and the ambient pressure near the ground surface may be in the range of 0.5 - 10 bar, and preferably may be in the range of 1 - 7.5 bar and more preferably may be around 5 bar.
An advantage of applying a pressure difference in the abovementioned range is that the compressed air ejected from the air outlets does not reach and disturb the seabed, yet creates sufficient pressure differences to startle the fish to be caught. By defining the pressure difference between the ambient pressure near the seabed and the air outlet, it is assured that the actual pressure difference is independent of the depth on which the assembly is used.
In an embodiment according to the invention, the tow-element is provided with at least one support element that is configured to, in operation of the assembly, rest on the ground surface and support the tow-element, wherein a height of the at least one support element is preferably adaptable, such that the distance between the ground surface and the tow-element is adjustable.
The advantage of providing a tow-element is at least one support element is that the surface of the assembly resting on the ground surface (i.e. seabed) is reduced, which reduces the drag resistance of the assembly. Preferably, the at least one support element has an adjustable height in order to adapt the assembly to the specific circumstances in the fishing area. In a preferred embodiment, the assembly comprises three supports, of which two are positioned near the longitudinal ends of the assembly, whereas the third is positioned substantially in the middle, when viewed along; the width of the tow-element.
In an embodiment according to the invention, an end portion of the support element may be an abrasion bobbin or a wheel.
In a preferred embodiment, the support element is provided with a friction-reducing end portion, such as a glider or a wheel. The application of a wheel is most preferred, because provides a high reduction of the friction due to the rollability of the wheel over the ground surface.
In an embodiment, the end portion may be a wheel that is connected to the support element with a quick release mechanism, such as a single extractable pin.
It is preferred to provide the end portion with a wheel that has a quick release mechanism, for example a single pin that can be extracted to remove the wheel. This allows a user of the assembly to quickly replace worn out wheels and thus reduce idle-time of the assembly. Furthermore, wheels have the advantage of having a low friction, which further reduces fuel consumption of a vessel using the assembly.
In an embodiment according to the invention, the elongated tow-element may be a beam trawl.
The assembly according to the invention may be provided with a beam trawl forming the elongated tow-element. An existing beam trawl may, using for example a conversion kit, be converted to an assembly according to the invention.
In an embodiment according to the invention, the elongated tow-element may be a wingformed structure.
In a preferred embodiment, the elongated tow-element is a wing-formed structure and/or a wing. An advantage of a wing-formed structure is that is reduces the drag resistance of the assembly and, consequently, reduces fuel consumption of the vessel equipped with the assembly. Moreover, the wing-formed structure also provides (some) additional lift to the assembly, therewith further reducing the drag resistance and thus fuel consumption. In addition, the additional lift provided with the wing-formed structure also allows the fishing speed to be reduced compared to the known assemblies.
In an embodiment according to the invention, the tow-element may comprise a beam trawl that is substantially rigid and a wing-formed structure, wherein the wing-formed structure may be rotatably attached to the beam trawl.
In an alternative embodiment, the tow-element may comprise both a rigid beam trawl as well as a, preferably rotatable, wing-formed structure or wing, which allows the wing to move relatively independently from the beam trawl. This allows the wing to provide lift or, alternatively, a downward force, depending on the requirement at a specific moment.
In an embodiment according to the invention, at least part of the number of air outlets may be positioned on the side of the wing-formed structure that during operation of the assembly is facing the ground surface, and wherein the air outlets may preferably be positioned such that, during operation of the assembly, the compressed air from the air outlets provides lift to the wingformed structure.
The efficiency of the assembly can be increased even further by positioning the air outlets underneath the wing-formed structure, because the air jets provided from the air outlets result in an upwardly directed force on the assembly. This reduces drag resistance and decreases fuel consumption of the vessel to which the assembly is connected.
In an elaboration, at least part of the number of air outlets is positioned underneath the wing in a recess provided in the wing-formed structure, wherein the air outlets are preferably directed under an angle with the wing to provide additional lift to the assembly.
The invention also relates to a fishing vessel comprising an assembly according to the invention.
The vessel according to the invention has similar effects and advantages as the abovementioned assembly according to the invention. An advantage of the fishing vessel according to the invention is that it has a reduced fuel consumption. This is mainly due to the fact that the assembly has a reduced weight and an increased lift with regard to the known assemblies. In addition, the vessel according to the invention provides an environmentally friendly fishing assembly, because it reduces environmental impact and also increases oxygen levels in the seawater by using compressed air. This has a positive effect on the development of sea life.
The invention also relates to a method for fishing, especially flatfish fishing, the method comprising the steps of:
- providing an assembly according to the invention; or a vessel according to the invention;
- connecting the assembly to a trawl;
- positioning assembly on ground surface, such as seabed;
- towing the assembly along the ground surface, while simultaneously ejecting compressed air from the air outlets towards the ground surface to startle the flatfish to be caught.
The method according to the invention has similar effects and advantages as the abovementioned assembly and vessel according to the invention.
The method according to the invention has the advantage that it provides an environmentally friendly fishing method that has a greatly reduced environmental impact on sea life in the fishing area and simultaneously reduces cost for the user (i.e. fisherman). Due to the use of compressed air, the sea life near the seabed is hardly disturbed, which increases the yield and decreases unwanted by-catches.
The invention also relates to a conversion kit for converting a beam trawl to an assembly according to the invention, the conversion kit comprising:
- providing an air conduit having an end portion that emanates in a number of air outlets and that is connectable to a supply of compressed air;
- a connector set for connecting the air conduit and the air outlets to the beam trawl and/or a towing assembly of the beam trawl, wherein the connectors set is configured for connecting the air outlets to the beam trawl such that the air outlets, in use of the beam trawl, are directed towards a ground surface along which the beam trawl is moved.
The conversion kit according to the invention has similar effects and advantages as the abovementioned assembly, vessel and method according to the invention.
The advantage of the conversion kit is that is can be used to refit fishing vessels with traditional assemblies to become fishing vessels according to the invention. This requires a relatively low amount of effort and is relatively cheap with regard to the benefits and advantages associated with the assembly according to the invention. As a result, the conversion kit provides an efficient and cost-effective way to increase the sustainability of the fishing sector, especially the flat-fish fishing sector.
Further advantages, features and details of the invention are elucidated on the basis of preferred embodiments thereof, wherein reference is made to the accompanying drawings, in which:
- Figure 1 shows a schematic side view of an example of the fishing assembly according to the invention;
- Figure 2 shows an enlarged view of a portion of the assembly of figure 1;
- Figure 3 shows a schematic top view of the fishing assembly of figure 1; and
- Figure 4 shows a vessel comprising a fishing assembly according to the invention.
Fishing assembly 2 according to the invention (see figures 1 and 2) comprises elongated wing-formed structure 4, which in this case is wing 4, which is moveable along seabed 1. Wing 4 is provided with a number of air outlets 6, which in this case are air nozzles 6 having a diameter of approximately 1 mm. In this example, wing 4 has width W that is substantially perpendicular to towing or moving direction T and wing 4 has length L that extends collinear with towing or moving direction T and perpendicular to width W. Thickness T of wing 4 varies over the length L of wing 4, which provides the wing-formed structure. Wing 4 is supported by two wheels 8 that are placed near the longitudinal ends of wing 4 and by central wheel 10, which is placed slightly in front of wing 4 and is connected to tow support 12. In this example, tow support 12 and wing 4 are rotatably connected to each other near a middle front end 4a of wing 4. Assembly 2 is connectable to a fishing vessel (not shown) by means of connector cables 14, 16 that are connected respectively to wing 4 and tow support 12. Assembly 2 is further connected to trawl 18 by means of trawl connectors 18a.
Compressed air is deliverable to air outlets 6 by means of air supply conduit 20, which in this case is air hose 20, and that has first end 20a that is connectable to a compressed air supply on a fishing vessel (not shown) and extends towards connection 22 on wing 4. In this example, air hose 20 further extends within wing 4 towards each of air nozzles 6. In this example air nozzles 6 are positioned in recess 24 that is formed on underside 26 of wing 4 that is directed towards seabed
1.
In this example, rear portion 28 of wing 4 is angled downwardly towards seabed 1 with respect to a forward portion 30 of wing 4, whereas air outlets 6 are directed substantially perpendicular to seabed 1. This specific configuration provides additional lift to wing 4 and therewith reduces drag resistance of assembly 2. A similar effect can also be achieved when the air outlets 6 are positioned at an angle with seabed 1 (preferably angled with the opening to a rear end of wing 4). Air nozzles 6 provide a pressure difference compared to the ambient pressure of about 5 bar, which is sufficient to rouse the fish from seabed 1 without actually reaching seabed 1. The fish are instead startled by the (sudden) pressure difference that is achieved by air jets from air nozzles 6.
In use, assembly 2 is towed by a vessel 100 (see figure 4) along seabed 1 in towing direction T. During towing, compressed air is provided via an air channel, which is here formed by air hose 20 to air nozzles 6, which produce air jet 32 directed at seabed 1. Flat fish 34 at seabed 1 are startled by the sudden pressure difference and detach from seabed 1 (see fish 36 in figure 1), which brings them into trawl 18 that is connected at a rear end of assembly 2.
The present invention is by no means limited to the above described preferred embodiments thereof. The rights sought are defined by the following claims, within the scope of which many modifications can be envisaged.

Claims (15)

CLAUSESCLAUSES 1. Assembly for fishing, especially flatfish fishing, the assembly comprising an elongated tow-element that in use of the assembly is moveable along a ground surface, such as a seabed, wherein the tow-element is configured to be connectable with a trawl for catching and retaining fish, and wherein the tow-element is configured to be connectable to a vessel for towing, characterized in that the assembly further comprises:1. Assembly for fishing, especially flatfish fishing, the assembly including an elongated tow element that is moveable along a ground surface, such as a seabed, such as the tow element is configured to be connectable with a trawl for catching and retaining fish, the tow element is configured to be connectable to a vessel for towing, characterized in that the assembly further comprises: - an air channel for channeling compressed air, the air channel extending from a first end that is connectable to a compressed air supply to a second end; and- an air channel for compressed air channeling, the air channel extending from a first end that is connectable to a compressed air supply to a second end; and - a number of air outlets that are connected to the second end of the air channel and are operatively connected to the elongated tow-element, wherein in use of the assembly the number of air outlets is directed towards the ground surface and is configured for ejecting compressed air towards the ground surface.- a number of air outlets that are connected to the second end of the air channel and are operatively connected to the elongated tow element, in use of the assembly the number of air outlets is directed towards the ground surface and is configured for ejecting compressed air towards the ground surface. 2. Assembly according to clause 1, wherein the air channel at least partially extends within the tow-element and wherein the number of air outlets is positioned in or on an outer surface of the tow-element, and preferably wherein the number of air outlets forms an integral part of the tow-element.2. Assembly according to clause 1, where the air channel is at least partially extended within the tow element and where the number of air outlets is positioned in or on an outer surface of the tow element, and preferably according to the number of air outlets forms an integral part of the tow element. 3. Assembly according to any one of the preceding clauses, wherein the number of air outlets are positioned along the width of the tow-element, and preferably are substantially evenly spaced along the width of the tow-element.3. Assembly according to any of the preceding clauses, whether the number of air outlets are positioned along the width of the tow element, and preferably are substantially equally spaced along the width of the tow element. 4. Assembly according to any one of the preceding clauses, wherein the air outlets are air nozzles having an air nozzle diameter, and preferably wherein the air nozzle diameter is adaptable.4. Assembly according to any of the preceding clauses, air outlets are air nozzles having an air nozzle diameter, and preferably the air nozzle diameter is adaptable. 5. Assembly according to any one of the preceding claims, wherein each of the number of air outlets has a diameter, wherein the air outlet diameter is in the range of 0.1 -7 mm, and preferably is in the range of 0.5 - 5 mm, and more preferably is in the range of 1 - 3 mm.5. Assembly according to any one of the preceding claims, each of the number of air outlets has a diameter, the air outlet diameter is in the range of 0.1-7 mm, and preferably is in the range of 0.5-5 mm , and more preferably is in the range of 1 - 3 mm. 6. Assembly according to any one of the preceding claims, wherein a distance between the air outlets and the ground surface is in the range of 5-70 cm, and preferably is in the range of6. Assembly according to any one of the preceding claims, where a distance between the air outlets and the ground surface is in the range of 5-70 cm, and preferably is in the range or 10-50 cm, and more preferably is in the range of 20 - 30 cm.10-50 cm, and more preferably is in the range or 20 - 30 cm. 7. Assembly according to any one of the preceding claims, wherein a pressure difference between the air outlet and the ambient pressure near the ground surface is in the range of 0.5-10 bar, and preferably is in the range of 1 - 7.5 bar and more preferably is around 5 bar.7. Assembly according to any of the preceding claims, a pressure difference between the air outlet and the ambient pressure near the ground surface is in the range of 0.5-10 bar, and preferably is in the range of 1 - 7.5 bar and more preferably is around 5 bar. 8. Assembly according to any one of the preceding claims, wherein the tow-element is provided with at least one support element that is configured to, in operation of the assembly, rest on the ground surface and support the tow-element, wherein a height of the at least one support element is preferably adaptable, such that the distance between the ground surface and the tow-element is adjustable.8. Assembly according to any one of the preceding claims, the tow element is provided with at least one support element that is configured to, in operation of the assembly, rest on the ground surface and support the tow element, with a height of the at least one support element is preferably adaptable, such that the distance between the ground surface and the tow element is adjustable. 9. Assembly according to any one of the preceding clauses, wherein the elongated towelement is a beam trawl.9. Assembly according to any of the preceding clauses, the elongated towel is a beam trawl. 10. Assembly according to any one of the clauses 1-8, wherein the elongated tow-element is a wing-formed structure.10. Assembly according to any one of the clauses 1-8, the elongated tow element is a wing-formed structure. 11. Assembly according to any one of the clauses 1 - 8, wherein tow-element comprises a beam trawl that is substantially rigid and a wing-formed structure, wherein the wingformed structure is rotatably attached to the beam trawl.11. Assembly according to any one of the clauses 1 - 8, with tow element comprising a beam trawl that is substantially rigid and a wing-formed structure, with the wingformed structure being rotatably attached to the beam trawl. 12. Assembly according to clause 10 or 11, wherein at least part of the number of air outlets is positioned on the side of the wing-formed structure that during operation of the assembly is facing the ground surface, and wherein the air outlets are preferably positioned such that, during operation of the assembly, the compressed air from the air outlets provides lift to the wing-formed structure.12. Assembly according to clause 10 or 11, at least part of the number of air outlets is positioned on the side of the wing-formed structure that is during operation of the assembly is facing the ground surface, and the air outlets are preferably positioned such that, during operation of the assembly, the compressed air from the air outlets provides lift to the wing-formed structure. 13. Fishing vessel comprising an assembly according to any one of the preceding claims.13. Fishing vessel including an assembly according to any of the preceding claims. 14. Method for fishing, especially flatfish fishing, the method comprising the steps of:14. Method for fishing, especially flatfish fishing, the method including the steps of: - providing an assembly according to any one of the clauses 1 - 12; or a vessel according to claim 13;- providing an assembly according to any one of the clauses 1 - 12; or a vessel according to claim 13; - connecting the assembly to a trawl;- connecting the assembly to a trawl; - positioning assembly on a ground surface, such as seabed;- positioning assembly on a ground surface, such as seabed; - towing the assembly along the ground surface, while simultaneously ejecting compressed air from the air outlets towards the ground surface to startle the flatfish to be caught.- towing the assembly along the ground surface, while simultaneously ejecting compressed air from the air outlets towards the ground surface to startle the flatfish to be caught. 5 15. Conversion kit for converting a beam trawl to an assembly according to any one of the clauses 1 - 12, the conversion kit comprising:5 15. Conversion kit for converting a beam trawl to an assembly according to any one of the clauses 1 - 12, including the conversion kit: - providing an air conduit having an end portion that emanates in a number of air outlets and that is connectable to a supply of compressed air;- providing an air conduit having an end portion that emanates in a number of air outlets and that is connectable to a supply or compressed air; - a connector set for connecting the air conduit and the air outlets to the beam trawl- a connector set for connecting the air conduit and the air outlets to the beam trawl 10 and/or a towing assembly of the beam trawl, wherein the connectors set is configured for connecting the air outlets to the beam trawl such that the air outlets, in use of the beam trawl, are directed towards a ground surface along which the beam trawl is moved.10 and / or a towing assembly of the beam trawl, the connector set is configured for connecting the air outlets to the beam trawl such that the air outlets, in use of the beam trawl, are directed towards a ground surface along which the beam trawl has been moved. CONCLUSIESCONCLUSIONS 1. Inrichting voor het vangen van vis, in het bijzonder voor het vangen van platvis, de inrichting omvattende een langwerpig sleepelement dat in gebruik van de inrichting beweegbaar is langs een bodemoppervlak, zoals een zeebodem, waarbij het sleepelement is ingericht om verbindbaar te zijn met een sleepnet voor het vangen en houden van vis, en waarbij het sleepelement is ingericht om verbindbaar te zijn met een vaartuig voor het slepen, gekenmerkt doordat de inrichting verder omvat:A device for catching fish, in particular for catching flatfish, the device comprising an elongated towing element that in use is movable along a bottom surface, such as a seabed, wherein the towing element is adapted to be connectable to a towing net for catching and keeping fish, and wherein the towing element is adapted to be connectable to a towing vessel, characterized in that the device further comprises: - een luchtkanaal voor het aanvoeren van perslucht, waarbij het luchtkanaal zich uitstrekt van een eerste uiteinde dat verbindbaar is met een persluchtaanvoer naar een tweede uiteinde; en- an air channel for supplying compressed air, wherein the air channel extends from a first end that can be connected to a compressed air supply to a second end; and - een aantal luchtuitlaatopeningen die verbonden zijn met het tweede einde van het luchtkanaal en werkzaam verbonden zijn met het sleepelement, waarbij in gebruik van de inrichting het aantal luchtuitlaatopeningen richting het bodemoppervlak gericht is en is ingericht voor het uitvoeren van perslucht richting het bodemoppervlak.- a number of air outlet openings which are connected to the second end of the air duct and are operatively connected to the towing element, wherein in use of the device the number of air outlet openings is directed towards the bottom surface and is adapted for outputting compressed air towards the bottom surface. 2. Inrichting volgens conclusie 1, waarbij het luchtkanaal zich ten minste gedeeltelijk in het sleepelement uitstrekt en waarbij het aantal luchtuitlaatopeningen gepositioneerd is in of op een buitenoppervlak van het sleepelement, en bij voorkeur waarbij het aantal luchtuitlaatopeningen een integraal onderdeel vormt van het sleepelement.Device as claimed in claim 1, wherein the air channel extends at least partially in the towing element and wherein the number of air outlet openings is positioned in or on an outer surface of the towing element, and preferably wherein the number of air outlet openings forms an integral part of the towing element. 3. Inrichting volgens één der voorgaande conclusies, waarbij het aantal luchtuitlaatopeningen gepositioneerd is over de breedte van het sleepelement, en waarbij de luchtuitlaatopeningen bij voorkeur evenredig verdeeld zijn over de breedte van het sleepelement.Device as claimed in any of the foregoing claims, wherein the number of air outlet openings is positioned over the width of the towing element, and wherein the air outlet openings are preferably equally distributed over the width of the towing element. 4. Inrichting volgens één der voorgaande conclusies, waarbij de luchtuitlaatopeningen luchtsproeiers zijn voorzien van een luchtsproeierdiameter, en waarbij de luchtsproeierdiameter bij voorkeur aanpasbaar is.Device as claimed in any of the foregoing claims, wherein the air outlet openings are air nozzles provided with an air nozzle diameter, and wherein the air nozzle diameter is preferably adjustable. 5. Inrichting volgens één der voorgaande conclusies, waarbij elk van het aantal luchtuitlaatopeningen een luchtuitlaatopeningdiameter heeft, waarbij de luchtuitlaatopeningdiameter in het bereik van 0.1-7 mm ligt, en bij voorkeur in het bereik van 0.5 - 5 mm ligt, en bij meer voorkeur in het bereik van 1-3 mm ligt.5. Device as claimed in any of the foregoing claims, wherein each of the number of air outlet openings has an air outlet opening diameter, the air outlet opening diameter being in the range of 0.1-7 mm, and preferably in the range of 0.5-5 mm, and more preferably in the range is 1-3 mm. 6. Inrichting volgens één der voorgaande conclusies, waarbij een afstand tussen de luchtuitlaatopeningen en het bodemoppervlak in het bereik van 5-70 cm ligt, en bij voorkeur in het bereik van 10-50 cm ligt, en bij meer voorkeur in het bereik van 20 - 30 cm ligt,6. Device as claimed in any of the foregoing claims, wherein a distance between the air outlet openings and the bottom surface is in the range of 5-70 cm, and preferably in the range of 10-50 cm, and more preferably in the range of 20 - 30 cm, 7. Inrichting volgens één der voorgaande conclusies, waarbij een drukverschil tussen de luchtuitlaatopeningen en de omgevingsdruk nabij het grondoppervlak in het bereik van 0.5 - 10 bar ligt, en bij voorkeur in het bereik van 1 - 7.5 bar ligt en bij meer voorkeur rond de 5 bar is.Device as claimed in any of the foregoing claims, wherein a pressure difference between the air outlet openings and the ambient pressure near the ground surface is in the range of 0.5 - 10 bar, and preferably in the range of 1 - 7.5 bar and more preferably around 5 bar is. 8. Inrichting volgens één der voorgaande conclusies, waarbij het sleepelement is voorzien van ten minste één steunelement dat is ingericht om in bedrijf van de inrichting op het bodemoppervlak te rusten en het sleepelement te ondersteunen, waarbij een hoogte van het ten minste één steunelement bij voorkeur aanpasbaar is, zodat de afstand tussen het grondoppervlak en het sleepelement aanpasbaar is.Device as claimed in any of the foregoing claims, wherein the towing element is provided with at least one support element which is adapted to rest on the ground surface during operation of the device and to support the towing element, wherein a height of the at least one support element is preferably is adjustable, so that the distance between the ground surface and the drag element is adjustable. 9. Inrichting volgens één der voorgaande conclusies, waarbij het langwerpige sleepelement een boomkor is.Device as claimed in any of the foregoing claims, wherein the elongated drag element is a beam trawl. 10. Inrichting volgens één der conclusies 1-8, waarbij het langwerpige sleepelement een vleugelvormige structuur is.Device as claimed in any of the claims 1-8, wherein the elongated drag element is a wing-shaped structure. 11. Inrichting volgens één der conclusies 1—8, waarbij het langwerpige sleepelement een boomkor omvat die in hoofdzaak rigide is en een vleugelvormige structuur omvat, waarbij de vleugel vormige structuur roteerbaar is verbonden met de boomkor.11. Device as claimed in any of the claims 1-8, wherein the elongated drag element comprises a beam trawl that is substantially rigid and comprises a wing-shaped structure, wherein the wing-shaped structure is rotatably connected to the beam trawl. 12. Inrichting volgens één der conclusies 10—11, waarbij ten minste een deel van het aantal luchtuitlaatopeningen gepositioneerd is aan de zijde van het vleugelvormige structuur die in gebruik van de inrichting richting het grondoppervlak wijst, en waarbij de luchtuitlaatopeningen bij voorkeur zodanig gepositioneerd zijn dat in gebruik van de inrichting de perslucht uit de luchtuitlaatopeningen lift verschaft aan de vleugel vormige structuur.Device as claimed in any of the claims 10-11, wherein at least a part of the number of air outlet openings is positioned on the side of the wing-shaped structure which, in use of the device, points towards the ground surface, and wherein the air outlet openings are preferably positioned such that in use of the device, the compressed air from the air outlet openings provides lift to the wing-shaped structure. 13. Visvaartuig omvattende een inrichting volgens één der voorgaande conclusies.A fishing vessel comprising a device according to any one of the preceding claims. 14. Werkwijze voor het vangen van vis, in het bijzonder platvis, de werkwijze omvattende de stappen van:A method for catching fish, in particular flatfish, the method comprising the steps of: - het verschaffen van een inrichting volgens één der conclusies 1 - 12; of een vaartuig volgens conclusie 13;- providing a device according to any one of claims 1 to 12; or a vessel according to claim 13; - het verbinden van de inrichting aan een sleepnet;- connecting the device to a trawl net; - het positioneren van de inrichting op een bodemoppervlak, zoals een zeebodem;- positioning the device on a bottom surface, such as a seabed; - het slepen van de inrichting over het bodemoppervlak, en het tegelijkertijd uitvoeren van perslucht uit de luchtuitlaatopeningen in de richting van het bodemoppervlak teneinde de te vangen platvis op te schrikken.- dragging the device over the bottom surface, and simultaneously discharging compressed air from the air outlet openings in the direction of the bottom surface in order to start the flatfish to be caught. 15. Conversiekit voor het converteren van een boomkor naar een inrichting volgens één der conclusies 1 - 12, de conversiekit omvattende:A conversion kit for converting a beam trawl to a device according to any one of claims 1 to 12, the conversion kit comprising: - het verschaffen van een persluchtleiding die is voorzien van een einddeel dat uitmondt in een aantal luchtuitlaatopeningen en die verbindbaar is met een persluchtaanvoer;- providing a compressed air line which is provided with an end part which opens into a number of air outlet openings and which can be connected to a compressed air supply; - een verbindingsset voor het verbinden van de persluchtleiding en de luchtuitlaatopeningen aan de boomkor en/of een sleepinrichting van de boomkor, waarbij de verbindingsset is ingericht voor het zodanig verbinden van de luchtuitlaatopeningen aan de boomkor dat de luchtluitlaalopeningen in gebruik van de boomkor naar een bodemoppervlak zijn gericht waarover de boomkor wordt bewogen.- a connecting set for connecting the compressed air line and the air outlet openings to the beam trawl and / or a dragging device of the beam trawl, wherein the connecting set is adapted to connect the air outlet openings to the beam trawl in such a way that the air closing slit openings in use of the beam trawl to a bottom surface are directed over which the beam trawl is moved. zie isossee isos 1/31/3
Figure NL2021312B1_C0001
Figure NL2021312B1_C0001
 zie isossee isos 2/32/3
Figure NL2021312B1_C0002
Figure NL2021312B1_C0002
 ειειεοεειειεοε 3/33/3
Figure NL2021312B1_C0003
Figure NL2021312B1_C0003
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0691077A1 (en) * 1994-07-09 1996-01-10 HAIKO MEYER GmbH & Co. KG Method and means for catching flat-fish or similar
EP0908094A1 (en) * 1997-10-07 1999-04-14 J. Hoogenraad Marine Engineering Fishing device
WO2007148974A1 (en) * 2006-06-22 2007-12-27 H.F.K. Engineering Fishing equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0691077A1 (en) * 1994-07-09 1996-01-10 HAIKO MEYER GmbH & Co. KG Method and means for catching flat-fish or similar
EP0908094A1 (en) * 1997-10-07 1999-04-14 J. Hoogenraad Marine Engineering Fishing device
WO2007148974A1 (en) * 2006-06-22 2007-12-27 H.F.K. Engineering Fishing equipment

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