EP0073214B1 - Trimaran auto stable - Google Patents

Trimaran auto stable Download PDF

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Publication number
EP0073214B1
EP0073214B1 EP82900639A EP82900639A EP0073214B1 EP 0073214 B1 EP0073214 B1 EP 0073214B1 EP 82900639 A EP82900639 A EP 82900639A EP 82900639 A EP82900639 A EP 82900639A EP 0073214 B1 EP0073214 B1 EP 0073214B1
Authority
EP
European Patent Office
Prior art keywords
axis
rotation
float
trimaran
volumes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82900639A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0073214A1 (fr
Inventor
Patrice M. Priam-Doizi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0073214A1 publication Critical patent/EP0073214A1/fr
Application granted granted Critical
Publication of EP0073214B1 publication Critical patent/EP0073214B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/14—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected resiliently or having means for actively varying hull shape or configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C7/00—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects
    • B63C7/003—Righting capsized vessels, e.g. sailing vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/14—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected resiliently or having means for actively varying hull shape or configuration
    • B63B2001/145—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected resiliently or having means for actively varying hull shape or configuration having means for actively varying hull shape or configuration

Definitions

  • the present invention relates to sailing vessels of the trimaran type making it possible to obtain whatever its position, its automatic return to a stable equilibrium, corresponding to its normal navigation position.
  • the central hull is provided with two lateral floats with constant volumes which are submersible or unsinkable. These three elements are connected by beams which very often have large and constant volumes (US-A-4159 006).
  • the assemblies are rigid or flexible, or else with very low clearance and the mast has a unique function which is to carry the wing.
  • Such designs in navigation result in permanent torsional forces and in the risk of charging the float or the central hull, because the waves cannot undoubtedly solicit them at the same time.
  • this type of ship has its stability curve which decreases, in order to tend towards a second stable equilibrium, obtained when the ship is upside down because conceptual means maintain the axis of symmetry necessary for navigation, and the mass of the mast works like a ballast. It is therefore impossible for him to find his initial navigation position alone.
  • the trimaran according to the invention makes it possible to avoid these drawbacks. It is characterized by the association with the airfoil and the floats, of means forming waterproof submersible volumes creating a potential energy which can move by a rotational movement to create a break in symmetry.
  • Each float is submersible and has a variable volumetric displacement consisting of a main tight volume located at the bow, a minimum secondary tight volume between the bottom of the hull and the floor, a hollow volume that can be filled with openings of the deck, of a hopper located towards the stern whose base corresponds to the level of the floor.
  • the float is secured to the connecting arms whose volumes are as small as possible, by a cylindrical axis allowing only freedom in rotation, comprised between two stops so that it can vary between an approximately horizontal position and an approximately vertical position.
  • the two stops are obtained by the link arms, limiting the rotation of the float which can be carried out freely in both directions, while having a means for ensuring an upward rotation, to obtain the vertical position against the stop. .
  • This axis of rotation is located near the center of the hull thrust, where the attitude obtained in navigation is included in the travel.
  • the mast and the floats are placed so that the vessel, during a righting, rotates around the longitudinal volumes of the central hull containing, in large, the results due to the weight of the different elements, as well as the axis of rotation located in the plane of symmetry, this axis derant to remain as parallel as possible to the surface of the water.
  • the position of the floats relative to the surface of the water is such that it can roll on one side.
  • the sealed volumes are non-deformable boxes offering permanent volumes acting immediately, or they are envelopes deformable by inflation under pressure, or it is a combination between the non-deformable and deformable volumes.
  • the device according to the invention allows the ship, whatever its position, to find a single stable equilibrium, corresponding to its normal navigation position; but also to reduce the risks of capsizing, because the central hull and the leeward float sail side by side, each reacting to their own waves, removing the torsional stresses, and the charging of the float.
  • Plate 1/4 is a perspective view of an exemplary embodiment, supplemented by plate 2/4 giving in FIG. 2 the design details of a float in three views where the front view is in section, then in Figure 3 the two positions obtained when it is in abutment (1) corresponding to an approximately horizontal position and in abutment (2) giving an approximately vertical position.
  • the two important phases of the functionning are represented on the 3/4 board; in Figure 4 when the ship is upside down and in Figure 5 when it is lying on the water, the float having performed its rotation; only the necessary forces understanding of the functionning are represented.
  • Plate 4/4 is the schematic drawing seen in perspective, where the elements are represented by tubes, the hatched volumes characterizing the essential tight volumes.
  • the ship has a rotating mast (3) resting on the central hull (6) which contains the axis (ZZ ') of rotation of the ship; the floats (4) and (5) each have an axis of rotation (XX ') which makes them integral with the connecting beams with a pyramidal tubular structure giving minimum volumes.
  • a float represents a maximum volume of the hull which is submersible, determining a maximum stability under sail, it is composed of a main tight volume whose center of thrust is (G1) a secondary volume whose center of thrust is ( G2), of a hopper located at (7), of a fillable volume (8) by the bridge openings (9), the non-symmetry of the axis of rotation (XX ') is defined by an angle acute (a) formed between the axis (XX ') and a straight line parallel to (WW'), contained in the plane (M) which is perpendicular to the plane (S) of the water surface and to the plane of symmetry (K) containing the axis (ZZ ').
  • the positioning of the sealed volumes of each float, relative to the new waterline of the central hull (6), are such that the ship can roll on one side (x) around its axis (ZZ ') which remains the most possible parallel to the surface of the water, when the means for straightening act.
  • the force (F6) translates the resultant concerning the mass of the ship applied to the level of the central hull (6).
  • the mast (6) develops its potential energy, translated in FIG. 4 of the board 3/4 by the force (F3) exerted at a depth (P) with a lever arm (L3) allowing the start of rotation by immersing the float (5) and the link arms which oppose a potential energy translated by force (F5) with a lever arm (L5).
  • the volume variation of the float (5) is made when the water fills the volume (8) through the bridge openings (9) by expelling the air by the emptier (7).
  • the end of the first phase is carried out when the head of the mast (3) is in contact with the water.
  • the transitional phase concerns the automatic rotation of the float (5) towards the stop (2) to perform an arbitrary angular rotation (0).
  • the second phase begins, it is shown on the board 3/4 in Figure 5.
  • the front volume can thus develop its potential energy, translated by the force (F5) exerted at a depth (P) with a lever arm (L5) opposing the total mass of the mast (3) which provides work, translated by force (F3) with a lever arm (L3).
  • the device which is the subject of the invention can be used very particularly for ships with trimaran type sails, responding to any form of navigation. It is applicable for offshore or coastal cruise ships, beach or racing machines, carrier plane or hydrofoil vessels.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
EP82900639A 1981-02-27 1982-03-01 Trimaran auto stable Expired EP0073214B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8103915 1981-02-27
FR8103915A FR2500804A1 (fr) 1981-02-27 1981-02-27 Trimaran auto-stable

Publications (2)

Publication Number Publication Date
EP0073214A1 EP0073214A1 (fr) 1983-03-09
EP0073214B1 true EP0073214B1 (fr) 1985-01-23

Family

ID=9255682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82900639A Expired EP0073214B1 (fr) 1981-02-27 1982-03-01 Trimaran auto stable

Country Status (4)

Country Link
US (1) US4562785A (et)
EP (1) EP0073214B1 (et)
FR (1) FR2500804A1 (et)
WO (1) WO1982002865A1 (et)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU588632B2 (en) * 1985-09-16 1989-09-21 Bruce Arthur Wallach Trimarans with adjustable outriggers
FR2603550B1 (fr) * 1986-09-08 1991-04-05 Mourgue Pascal Voilier deriveur leger avec dispositif coulissant de commande d'equilibre transversal
US4905620A (en) * 1987-09-30 1990-03-06 Cky, Inc. Watertight mast for sailing vessel
CA1293757C (en) * 1988-02-09 1991-12-31 Bronislaw Kadela All terrain off road vehicle
US5540170A (en) * 1994-08-17 1996-07-30 Purdy; Peter K. Multi-hull marine vessel with retractable outer hulls
US6000355A (en) * 1998-07-27 1999-12-14 Hall; Thomas R. Stabilized watercraft
US6960047B2 (en) * 2002-08-02 2005-11-01 Innovative Technology Application, Inc. Protection barrier apparatus
FR2858593B1 (fr) * 2003-08-05 2005-09-30 Francois Riche Voilier trimaran auto redressable
US20060216116A1 (en) * 2005-03-22 2006-09-28 Innovation Technology Application, Inc. Floating protection barrier gate
WO2010015043A1 (en) * 2008-08-08 2010-02-11 Matthew Morgan Wave-powered energy generation apparatus
CA3097207A1 (en) 2018-04-17 2019-10-24 Open Ocean Robotics Inc. Self-righting watercraft vessel

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2175335A6 (et) * 1972-03-10 1973-10-19 Piat Marchand Michel
US4102287A (en) * 1977-04-05 1978-07-25 Ferris Hamilton Y Catamaran with swingable mast and hulls
DE2727074A1 (de) * 1977-06-13 1978-12-21 Guenter Ullrich Vorrichtung zum leichten wiederaufrichten eines gekenterten kreuzerkatamaranes
US4117795A (en) * 1977-06-17 1978-10-03 Carlos Santiago Ruiz Multi-hull self rescuing system
US4159006A (en) * 1977-06-27 1979-06-26 Thurston John W Multihull vessels
CH628581A5 (en) * 1978-04-24 1982-03-15 Klaus Brauch Catamaran
CH637889A5 (fr) * 1980-11-24 1983-08-31 Roger De Weck Multicoque auto-redressable.

Also Published As

Publication number Publication date
FR2500804B1 (et) 1984-12-28
FR2500804A1 (fr) 1982-09-03
EP0073214A1 (fr) 1983-03-09
WO1982002865A1 (en) 1982-09-02
US4562785A (en) 1986-01-07

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