Floatation Device for an Aquaculture Basket

Abstract

A catamaran-shaped floatation device wherein an oyster basket can be attached to the upside of the device for elevation of the oysters above the water level, and then inverted to submerge the oysters below the water level.

Claims

1. A floatation device for aquaculture farming comprising a shaped hull.

2. The floatation device according to claim 1, wherein the device contains at least two brackets for attachment of an aquaculture basket.

3. The floatation device according to claim 1, wherein the device contains at least one ring for attachment of a rope or other attachment means.

4. The floatation device according to claim 1, wherein the device floats upon a body of water for the purposes of oyster farming.

5. The floatation device according to claim 2, wherein the device floats upon a body of water for the purposes of oyster farming.

6. The floatation device according to claim 3, wherein the device floats upon a body of water for the purposes of oyster farming.

7. The floatation device according to claim 1, wherein the basket is attached to the upside of the device to float above the water line, and can be inverted to submerge the basket under water.

8. The floatation device according to claim 2, wherein the basket is attached to the upside of the device to float above the water line, and can be inverted to submerge the basket under water.

9. The floatation device according to claim 3, wherein the basket is attached to the upside of the device to float above the water line, and can be inverted to submerge the basket under water.

10. The floatation device according to claim 4, wherein the basket is attached to the upside of the device to float above the water line, and can be inverted to submerge the basket under water.

11. The floatation device according to claim 5, wherein the basket is attached to the upside of the device to float above the water line, and can be inverted to submerge the basket under water.

12. The floatation device according to claim 6, wherein the basket is attached to the upside of the device to float above the water line, and can be inverted to submerge the basket under water.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Preferred features, embodiments and variations of the invention may be discerned from the following Detailed Description which provides sufficient information for those skilled in the art to perform the invention. The Detailed Description is not to be regarded as limiting the scope of the preceding Summary of the Invention in any way. The Detailed Description will make reference to a number of drawings as follows.

[0016] FIG. 1 illustrates a perspective view of an oyster basket attached to a floatation device;

[0017] FIG. 2 illustrates a perspective view of the floatation device;

[0018] FIG. 3 illustrates a front view of the floatation device;

[0019] FIG. 4 illustrates a top view of the floatation device; and

[0020] FIG. 5 illustrates a side view of the floatation device.

LIST OF COMPONENTS

[0021] 10 oyster basket [0022] 20 floatation device [0023] 22 hull [0024] 24 brackets [0025] 26 end cap [0026] 28 rear brackets [0027] 30 front ring [0028] 32 rear ring

DETAILED DESCRIPTION OF THE INVENTION

[0029] The following detailed description of the invention refers to the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the following description to refer to the same and like parts. Dimensions of certain parts shown in the drawings may have been modified and/or exaggerated for the purposes of clarity or illustration.

[0030] Turning now to the drawings there is illustrated an oyster basket 10 attached to a flotation device 20, wherein the flotation device is preferably a single piece of hollow moulded plastic forming a catamaran hull shape 22. The top side of the device 20 contains four brackets 24 to which the basket can be attached via engaging its end cap. The basket 10 can be attached to the brackets 24 through known means such as mating surfaces or a snap fit arrangement. It is to be understood that whilst reference is made to a catamaran shaped hull, the shape of the hull may indeed be varied according to the local conditions.

[0031] In FIG. 1 there is illustrated a single end cap 26 attached to the front two brackets 24, however it is to be understood that the invention is adapted for a second end cap to be attached to the rear two brackets 28 in the same manner The basket 10 can be secured via only one end attachment to save costs, however it is preferable for both ends to be attached for maximum security of the attachment.

[0032] The device 20 is of a larger footprint than the basket 10, therefore providing a stable and secure float, and the shape of the hull 22 is such that a relatively small amount of plastic is used thereby decreasing the overall cost of the device 20 while providing a stable structure which floats upon the water.

[0033] Thus when the floatation device 20 is in the upright position the oyster basket rests on the upside of the device and is therefore elevated out of the water. Inside the basket the oysters close their shells when in contact with the air, allowing them to dry out and additionally burning off and/or killing any overgrowth or fouling.

[0034] The device 20 can be inverted so that the topside of the device floats on the water and the basket is submerged underneath. This prompts the oysters to open their shells, working the adductor muscles and allowing the oysters to feed and grow. Therefore, the device 20 can be flipped at desired intervals to mimic the movement of the tides and exposing the oysters to alternatively submerged and dry environments which increases their health and life.

[0035] Therefore, the device 20 and oyster basket 10 can be used in non-intertidal environments such as oyster farms without any disadvantage over naturally cultivated oyster beds. In fact, the system can lead to increased and uniform growth rates, minimisation of labour, sustainability, avoidance of damage to natural reefs and oyster beds and reduced costs.

[0036] The shape of the hull 22 in particular is advantageous due to its catamaran shape which uses less surface area than a flat shape thus reducing production costs while still providing a secure and sturdy platform that will not be overturned by accident. The optimum shape that occupies the least surface area is a sphere, and the shape that occupies the most surface area is a rectangular prism or cube. Therefore, a float shaped like a sphere would use the least amount of plastic and the rectangular prism or cube the most, increasing overall production costs as plastics can be extensive. However a sphere or completely rounded shape would not provide sufficient stability for the oyster basket and so is not practicable. The catamaran shape is ideal as it uses less plastic than a rectangular prism or sphere, but still provides overall stability for the basket. Nevertheless as mentioned above other shapes may very well be employed.

[0037] The device 20 also contains a front ring 30 located at the front of the hull 22 and a rear ring 32 located at the rear of the hull 22. This allows the attachment or lines to the rings 30 and 32 for easy transport or use of a longline system joining many devices to one another.

[0038] Illustrated in FIG. 2 is a perspective view of the device 20 without the oyster basket attached. In this Figure the features of the device can be seen more clearly including the placement of the front and rear brackets 24 and 28.

[0039] A front view of the device 20 is illustrated in FIG. 3 where the catamaran shape of the hull 22 can be seen more clearly. The upside of the device 20 is in preference primarily flat to allow for easy securement of the basket 10 and slightly curved on the sides and a concave arch formed on the underside of the hull 22. This prevents any water from splashing up into the basket 10 allowing the oysters to dry through contact with the open air. This shape also reduces water resistance when the device 20 is being pulled along by a rope or some other apparatus, allowing it to glide smoothly through the water like a boat.

[0040] FIG. 4 illustrates a top view of the device 20 with the components of the upside, including the front brackets 24, rear brackets 28, front ring 30 and rear ring 32.

[0041] FIG. 5 illustrates a side view of the device demonstrating further the concave front and rear ends which distribute the buoyance of the device 20, thus increasing the solidity and durability of the device 20.

[0042] The reader will now appreciate the present invention which is a flotation device wherein an oyster basket can be attached to the upside of the device for elevation of the oysters above the water level, and then inverted to submerge the oysters below the water level, and wherein the shape of the device allows for maximum buoyance with reduced surface area. In an additional aspect of the invention the device contains rings which allow for easy transport of the device across the water, and wherein the catamaran shape of the hull allows for smooth transport.

[0043] Further advantages and improvements may very well be made to the present invention without deviating from its scope. Although the invention has been shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope and spirit of the invention, which is not to be limited to the details disclosed herein but is to be accorded the full scope of the claims so as to embrace any and all equivalent devices and apparatus. Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of the common general knowledge in this field.

[0044] Thus it is to be understood that the floatation device could accommodate one more baskets in a stacked arrangement provided that the floatation device has sufficient buoyance. Other variations may include how the baskets are locked to the floatation device and the floatation device may include multiple attachment means to suit different types of baskets.

[0045] In the present specification and claims (if any), the word “comprising” and its derivatives including “comprises” and “comprise” include each of the stated integers but does not exclude the inclusion of one or more further integers.