ES2246609A1 - Industrial dredge for extraction of mollusks buried in marine bed, has vertically adjustable board united to inferior central zone of launching slip, where launching slip is pulled by traction force through anchorage points - Google Patents

Abstract

The dredge has a triangular form structure comprising an end that is provided with a net flake or collector mesh of extracted mollusks in a marine bed. The triangular form structure is provided with prongs. A vertically adjustable board is united to an inferior central zone of a launching slip. The launching slip is pulled by traction force through anchorage points.

Description

Industrial dredge for shellfish extraction in deep.

Object of the invention

The object of the present invention relates to a device for the extraction of mollusks on the seabed, mollusks that are buried in the seabed in generally sandy grounds.

The purpose of the present invention is to  maximize the time spent in shellfish product, investing in the process as little time as possible with a minimal effort and therefore obtaining a much higher performance to done manually with a long rod.

The tractive force goes from being, instead of being human, a shaft with pulley located on the tractor trailer and connected to a hydraulic that can be supplied by any appropriate device or by the boat itself.

Background of the invention

In the art of fishing are known arts and shellfish equipment such as the roots that are used manually by fishermen to dig up the bottom Marine the seafood. This happens for example with mollusks such as clams, cockles, etc ...

The roots are usually constituted by a kind of baskets, usually metallic and closed, that they leave ajar spaces in their configuration, which is where they fall the mollusks that are unearthed by lower spikes. These baskets are attached to a long rod that is held by the shellfish from a boat or take it manually when the Depth is relatively small.

These roots have certain disadvantages such as They are

- These fishing gear are completely manual and shellfish team, with the consequent fatigue of the shellfish, At most it lasts a time of approximately 3 hours.

- The roots that the shellfish manages are relatively small or slightly wide, in order to be able to hold and  Be perfectly handled the root.

- The performance is extremely low, that is the effort / hour / species capture ratio is not high what It has an impact on the number of catches and the cost They reach in the market.

- In areas of depth, which covers the shellfish, the management of the root is also produced by hand by part of the shellfish with a longer rod, which increases the effort to which the shellfish is subjected.

Description of the invention

The dredger that the invention advocates has a triangular floor structure that is extremely light and easy handling, with a reduced attack zone, resulting in a lower friction with the mesh than if it had any other shape appropriate.

The attack zone consists of a body in the form of a comb with spikes, placing this in the back of the rake. This comb with spikes is regulated both in its shape, size, separation and inclination of the spikes, depending of the type of mollusks to which the collection is destined, being of special use in bivalve molluscs such as clam, cockle, etc.

In the front part of the comb a skateboard that rests on the seabed, constituted that skateboard by a metal plate attached to the structure of the dredge at least two anchor points, and anchored at one point intermediate of the structure, being the one that will allow to introduce in The dredge in the sand is more or less.

On the back of the dredge there is a snowflake large mesh that stores a significant number of mollusks, which are hoisted to the boat with the help of a bridge arm that lifts the whole set by the dredge and the shell full of mollusks.

Depending on the type of mollusk to be collected and the minimum dimensions thereof, so different flakes will be used with larger or smaller mesh diameters.

Two hooks will form the drag points of the harrow, serving such hooks to join the harrow to the force tractor.

Brief description of the drawings

To complete the description that is being performing and in order to help a better understanding of the characteristics of the invention, is attached herein descriptive, of a set of figures in which illustratively and not limiting, it has represented the most characteristic Relevant of the invention.

Figure 1 represents a profile view of the dredge of the invention.

Figure 2 shows a plan view of the dredge.

Figure 3 finally shows a front view of the dredger

Detailed description of the drawings

Through the drawings of the present invention, we can observe how the dredger that advocates the invention is it constitutes by means of a triangular structure (1) - (2), in whose back side there is an inclined comb (7) barbed finish (6) that attack the seabed, introducing that comb into the Same to a certain depth. With this triangular shape there is less friction of the mesh than with any other shape capricious

In a practical embodiment of the invention, make a dredger with a reduced attack of for example 1 meter, That will be enough for a large collection of mollusks.

The inclined comb (7) as can be seen in the Figure 1, is inclined with an angle of attack of 45º that  facilitates the work of penetration in the seabed.

Attached to the central part of the structure is find a skateboard (4) that rests on the seabed and that it will be the one that defines the greater or lesser penetration of the comb (7) and of his spikes (6). This skateboard (4) will be adjustable in height, so which are available with adjustment screws (5) that will rise or they will lower the skateboard for a greater or lesser penetration of the comb and Your spikes These anchor and regulation points (5) are placed focused on the structure of the dredger which will allow maintaining a  balanced positioning of said dredge. The skateboard has a piece form or flat sheet placed transversely to the direction of regular displacement of the dredger and its union to the dredger structure is made through an inclined plane that It facilitates the movement of the dredge on the seabed.

The spikes (6) are preferably sectional circular and sharp ends as if they were pens, having a preferred length of between 6 and 8 cm.

On the back of the dredge, there are a flake or mesh, not represented, collecting the mollusks that dig up the comb and its spikes and thanks to the diameter of the mesh will allow them to be retained inside the flake or mesh mollusks that are intended for their size or can be collected.

With reference (3) the coupling of drag of the dredge, hook on which the structure converges of the aforementioned dredger.

Claims (6)

1. Industrial dredger for the extraction of bottom mollusks, comprising, - A triangular structure - A net or mesh flake at the end of the structure on which mollusks are collected - A comb with spikes that digs into the bed Marine - A skateboard supporting the structure of the dredge. 2. Industrial dredge for the extraction of bottom mollusks according to claim 1, characterized in that the skateboard is height adjustable with respect to the structure thereby defining the working depth of the dredge. 3. Industrial dredge for the extraction of bottom mollusks according to claim 2 characterized in that the height adjustment of the skateboard is carried out by means of screws attached to the structure of the dredge and the skateboard respectively. 4. Industrial dredge for the extraction of mollusks in the background according to claim 1, characterized in that the comb finished in barbs is inclined with respect to the structure of the dredge. 5. Industrial dredge for the extraction of bottom mollusks according to claims 1 and 4 characterized in that the angle of inclination of the comb is approximately 45 °. 6. Industrial dredge for the extraction of mollusks in the background according to claims 1 and 4, characterized in that the barbs have a length between 6 and 8 cm. being the same circular section.