FR2766789A1 - Stabiliser for hull and rigging of multi hulled boats - Google Patents

Abstract

The system uses a double pivot arrangement. The first pivot connects the mast (L) and its extension arm (B) to the structure(S) which joins together the hulls of the boat. It is formed about an axis (A) connected to the structure and passing through the two first elements. The second pivot connects the mast and its extension arm to the mass (M) formed by the cabin and cockpit. It is extends through a bearing (P) at the lower end of the arm and an axis (A') formed with the mass. Rigging can be made under sail without altering the stability or propulsive capacity of the boat by limiting the movement of the mast. This is achieved in one way through the force of resistance which is inverse and proportional to that which is exerted on the mass by its weight.

Description

TITLE
Stabilization device for the entire hull and the rigging of multihull boats
DESCRIPTION 1: Technical field of the invention
The device currently limits its field of application
in the context of shipbuilding and more specifically
ment to multihull sailboats.

2: State of the prior art
To date multihull sailboats of the catamaran type
or trimarans were rigid or semi-rigid assemblies
of.

Constraints on the base of these boats
by the force of the wind and the sea induced phenomena
of gite and drift prejudicial to the propulsion, to the
security and comfort.

3 Statement of the invention
This device, if it does not claim to eliminate total
ment of such constraints, intends to combine forces n a-
not canned for greater stability and
better use of propellant power by
simple dissociation of part of the weight of the boat
used by gravitation for stability.

To do this, said device abandoning the principle of a
exclusively rigid structure of the boat introduces a
articulation at the mast foot-axis link of liai
sound of floats.

By combining the forces of the sea, the wind and the pesan
tor in view of the useful offset center of gravity, the invention
tion goes to the heart of the marine problem: stability.

Its main characteristic is automation by simple
gravitation of part of the weight of the boat (M, B,
A ', P', V and V ') 4: Presentation of the drawings
The accompanying drawings illustrate the invention
Figure 1 shows in section the device according to the reven
dication N "1.

Figure 2 shows in perspective the device according to the
claim No. 1.

Figure 3 shows in perspective the device according to the
claim No. 2.

Figure 4 shows in section the device according to the reven
dication N "2
Figure 5 shows in section the entire device
according to claims Nos. 1 and 2 when under the effect of
one of the pawls limits the amplitude of the rigging.

Figure 6 shows in section the whole device
according to claims Nos. 1 and 2 when the boat,
remaining generally stable, the mass, coming to counterbalance
without obstruction on the structure, limits the amplitude of the rigging.

Figure 7 shows a rough section through the entire
device according to claims "1 and 2 when the mass
fully compensates for the pressure on the rigging by
wind.

Figure 8 shows a rough section of the entire
device according to claims Nos. 1 and 2 when the mass
does not fully compensate for the pressure on the rig
windward without the amplitude exceeding 60.

Figure 9 shows a rough section through the entire
device according to claims N 1 and 2 in the condi
Figure 6.

Figure 10 shows a rough section through the entire
device, according to claims N 1 and 2, evolving
until the amplitude of the rigging is limited by one of the
pawls under the conditions of figure 5.

5: Detailed presentation
a) Structures
The device comprises a first static element
constituted by the structure (S) connecting the floats
of the boat between them
Said structure (S) is hollowed out in the middle so
allow passage of the mast foot (L) and its
extension arm (B) and their lateral movement
Solid with the structure (S), an axis (A) crosses
perpendicular to it and horizontally the
part hollowed out.

The device comprises a second mobile element
consisting on the one hand of the mast foot (L) and on the other
part of its extension arm (B) which, crossed by
the axis (A), pivots on it while resting
above.

The extension arm (B), hollowed out in its upper part
lower allows the connection by sleeve of the mast foot (L).

In its lower part, the arm (B) affects the for
me of a marine anchor whose two appendages (V
and V ') are arranged symmetrically and perpendicular to
rement to the plane of symmetry of the boat.

In its lowest part, the arm (B) ends with
a bearing (P ') in which is placed an axis (A').

The device comprises a third mobile element, the
mass (M) consisting of the cockpit and cock assembly
pit of the boat.

This set has above the center of gravity
a mobile articulation point, constituted by the axis
A ', allowing its pendular lateral movement.

The mass (M) also has on its upper face
and in the middle four ccrres lateral notches
laying two of them in the passage gorges
appendages V and V 'of the arm (B) and for both
others at the grooves for passage of the pawls (0 and O ').

The device finally includes a fourth element
mobile, the pawls (0 and 0 '), integral with the
structure (S) by a pivoting articulation and available
symmetrically and parallel to the a
xe A.

The curves of the external and internal faces of the said
ratchets have a functional geometry, the
external face allowing the erasure of the part towards
inside and upwards under the pressure exerted
sporadically through the appendix (V or V ') and the face
internal authorizing their complete erasure when the
mass (M) comes without obstacle to buttress on the
structure (S).

b) Operation
Under the force of the wind, the rigging tends to fade and
the mast, pivoting on its axis A, tilts exerting by
through the arm (B) leverage on the mas
se (M).

The mass (M) itself exerts on this occasion a
reverse resistance pressure proportional to the
force applied by the wind on the rigging.

This phenomenon is limited in its amplitude so
different depending on the circumstances
- When the boat remains generally stable
ble, the mass coming into contact without obstacle
on the end-of-travel structure, the effect of
leverage cannot exceed 60.

- When, however, under the effect of the cottage,
the boat tilts strongly, the intervention
the pawl (V or V ') placed downwind which
by gravitation comes to block the course of
the corresponding appendage of the extension arm
(B), reduces the leverage exerted by the
rigging on the mass (M) at around 12 ",
thereby preventing any overturning of the vessel
cation.

6: Industrial applications
The first of the device's applications concerns in
of nautical industry and shipbuilding of sailboats
multihulls of competition but also of the dinghies type
light.

Other applications are possible in the fields of
automotive, building industry etc ... (Correctors
plates, anti-seismic devices).

Claims (1)

PREAMBLE Stabilization device for the entire hull and the rigging of multihull boats, characterized in that it consists of a double articulation The first connects the mast (L) and its extension arm (B) to the structure (S) joining the floats of the multihull boat, by means of an axis (A) integral with said structure (S) and which crosses the first two elements (L and B); the second connects the mast (L) and its extension arm (B) to the mass (M) made up of the cockpit and cockpit assembly by means of a bearing (P) located in the lower part of the end of the arm extension (B) and an axis A 'forming part with the mass (M); so that the rigging can be erased in the wind without altering either the stability of the boat or its propulsive capacities, while limiting the amplitude of the mast on the one hand thanks to the reverse and proportional resistance pressure exerted the mass (M) by its weight and on the other hand, by the buttress of the latter on the structure (S) or on the pawls (0 and 0 ') which in the event of significant heeling come by gravity to stop the race appendages (V and V ') of the extension arm (B). CLAIM # 1 Device according to claim N "1 characterized firstly in that it comprises a first static element constituted by the structure (S) connecting the floats of the boat to each other said structure (S) being hollowed out in the middle in order to allow the mast foot (L) and its extension arm (B) to pass as well as their lateral movement on an axis (A) integral with the structure (S), which it crosses parallel and horizontally to the plane of symmetry Characterized on the other hand in that it comprises a second, mobile element, consisting on the one hand of the mast foot (L) and on the other hand of its extension arm (B) which, crossed by the axis (A ), pivots on it while resting on it (first point of articulation of the device according to claim "1) Set (L and B) which in its lowest part, the extension arm (B) ends with a bearing (P ') in which is placed an axis (A') Finally characterized in that it comprises a third element which is also mobile, the mass (M) consisting of the cockpit and cockpit assembly of the boat; assembly which has above its center of gravity a mobile articulation point (the second of the device according to claim N "1), constituted by the axis A 'allowing its lateral pendular movement Mass (M) which also comprises at each of the lateral ends of its upper face situated above the structure (S) an oblique surface allowing the latter to come into harmonious abutment on said structure (S) when the rigging, under wind pressure, tends to exceed an amplitude of 60 So that under the effect of the wind, the rigging tends to fade, the mast and its extension arm (B) pivoting on the axis A, tilt exerting a leverage on the mass (M) which it -even on this occasion develops a pressure of inverse resistance and proportional to the force applied to the rigging phenomenon limited to an amplitude of 60 ", when the boat remains generally stable, by the fact that said mass (M) comes to buttress at the end of race on the structure (S). CLAIM # 2 Device according to claim N "2 characterized first in that the extension arm (B) in its lower part takes the form of a sea anchor whose two appendages (V and V ') are arranged symmetrically and perpendicular to the plane symmetry of the boat Then characterized in that it comprises two pawls (0 and 0 '), integral with the structure (S) by a pivoting articulation and arranged symmetrically and parallel to the axis A, on the underside of the said structure Finally, characterized in that the mass (M) also comprises on its upper face and directly above the structure (S) four lateral notches corresponding, for them, to the passage grooves of the appendages V and V 'of the arm (B) and for the other two to the grooves for passage of the pawls (0 and O ') So that when under the effect of the heel, the boat tilts strongly, the pawl (V or V ') placed on the side of the cottage comes by simple gravitation to block the travel of the appendix (O or O') of the extension arm (B) -reducing the leverage exerted by the rigging on the mass (M) to an amplitude which cannot exceed 12 and preventing any lateral overturning of the boat.