EP0058626B1 - Stabilizing device for a dinghy - Google Patents

Description

The object of the invention relates to a boat stabilizing device.

It is intended for equipping ships fitted with V-shaped hulls to ensure their stabilization when stationary.

In known devices, a tunnel or water ballast generally installed along the keel or in the hull is used.

Among the means generally used, such as the patent US A 4 048 939 describes them, we tried to obtain that when stopped, the boat rests on its bottom while in working order only the lower surface of the caréne becomes load-bearing, one thus thought of using a tubular element.

This tubular element can be provided with a large opening at the rear and a vent at the front.

These devices, to be effective, caused an increase in displacement by the entry of water into the boat, which weighed down could no longer avoid the effect of the waves when stationary.

This tunnel creates a longitudinal axis which facilitates the lateral overturning of the boat.

It decreases the dip while raising the center of gravity, which results in a loss of stability. During start-up, the water contained in this capacity does not empty instantly, so that the movement requires significant energy consumption. On the other hand, if you stop during start-up, the water remaining in the partially empty tunnel quickly evacuates forward and causes the boat to nose down, which must therefore have a higher freeboard and a greater weight.

The device according to the invention eliminates these drawbacks and makes it possible to keep the boat in a V-shaped fairing having a maximum of marine qualities in working order while giving it at rest the stability which the flat-bottomed boats have.

It is constituted by a flat bottom of triangular shape under which is positioned capacity of triangular section with total opening at the height of the base of the rear panel representing the large base, while the volume and the width of this prismatic or pyramidal element goes tapering to end in a point at the front, extending by a conduit opening into a vent running along the bow to its upper part.

• La figure 1 représente vue en élévation et de profil la coque en V.
• Les figures 2 et 3 montrent vue en élévation les faces avant et arrière du bateau.
• Les figures 4 et 5 sont des vues en plan par en dessous et en perspective de la capacité formant le profil en V de section triangulaire.
• Les figures 6, 7, 8 représentent les positions prises par l'élément stabilisateur lors du déplacement de l'embarcation.

In the accompanying drawings, given by way of nonlimiting example, of one of the embodiments of the subject of the invention:

• Figure 1 shows an elevation and profile view of the V-shaped hull.
• Figures 2 and 3 show an elevational view of the front and rear sides of the boat.
• Figures 4 and 5 are plan views from below and in perspective of the capacity forming the V-profile of triangular section.
• Figures 6, 7, 8 show the positions taken by the stabilizing element when moving the boat.

The boat 1 has a V-shaped fairing and an oblique floor 2 inclined from the rear 3 towards the front 4.

This triangular waterproof floor forms the bottom of the boat.

It constitutes with the fairing a V-shaped profiling whose capacity 6 of triangular section 7 with total opening extends the rear panel 5 (fig. 2).

The volume of this triangular capacity is of pyramidal or prismatic section has a decreasing volume (fig. 4, 5) so that the end point of the edge 4 is continued by the profile of the stem 9 which extends the edge of the V and ends in a conduit 10 opening into a vent 11.

This venting can serve as a chain well.

Water circulates freely in this capacity 6, but remains there in a static manner.

During the stop (fig. 1, 6) the boat weighs only its own weight and also only displaces its own weight in water.

It floats on its flat floor, while water fully fills capacity 6.

Its stability is that of a flat-bottomed boat.

Only a floating anchor effect can be added per reaction if the rear bottom of the V-shaped hull is swimming in the water. In no case does the water act as ballast.

On the other hand, during start-up (fig. 7), under the effect of a force pushing it forward, there is a translational stability of shapes when stationary or dynamic stability of lift due to the profile of the bottoms. V-shaped hull

This then removes the floating anchor effect. The water stays put and the boat comes out of the water.

We suppress all the reactions that a ballast would create.

The side effects due to friction are to be eliminated as much as possible so as not to disturb the water which is not part of the boat, thus the vent 11 serves to prevent pressure or depression of the air which could disturb the water. .

Finally, in working order, stability is only ensured (fig. 8) by the lift of the V-shaped hull.

However, the shapes, dimensions and arrangements of the various elements may vary within the limit of the equivalents, like the materials obtained for their manufacture, without thereby changing the general conception of the invention which has just been described.

Claims (1)

1. Device permitting to provide for a small craft a V-careenage presenting a maximum of sea-going qualities when in motion whilst conferring on it, when at rest, the stability obtained with flat bottomed boats, the device forming the lower surface of the careenage comprising a chamber which extends towards the forward part with progressive reduction in size and is provided with an opening at the rear and a vent hole at the front, characterised by a flat bottom of triangular shape under which is disposed a chamber (6) of triangular section (7) with total opening at the level of the bottom, the volume and width of this prismatic or pyramidal element becoming less to terminate as a point at the front and it being extended by a conduit (10), opening at a vent hole (11), lying along the stem (9) to its upper part.

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