EP0553381A1 - Système d'enroulement de voile pour bateaux - Google Patents

Système d'enroulement de voile pour bateaux Download PDF

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Publication number
EP0553381A1
EP0553381A1 EP92101580A EP92101580A EP0553381A1 EP 0553381 A1 EP0553381 A1 EP 0553381A1 EP 92101580 A EP92101580 A EP 92101580A EP 92101580 A EP92101580 A EP 92101580A EP 0553381 A1 EP0553381 A1 EP 0553381A1
Authority
EP
European Patent Office
Prior art keywords
boom
mast
sail
furling
furling system
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.)
Withdrawn
Application number
EP92101580A
Other languages
German (de)
English (en)
Inventor
Olaf T. Harken
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.)
Harken Inc
Original Assignee
Harken Inc
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 Harken Inc filed Critical Harken Inc
Priority to EP92101580A priority Critical patent/EP0553381A1/fr
Publication of EP0553381A1 publication Critical patent/EP0553381A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H9/00—Marine propulsion provided directly by wind power
    • B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
    • B63H9/08—Connections of sails to masts, spars, or the like
    • B63H9/10—Running rigging, e.g. reefing equipment
    • B63H9/1092—Means for stowing, or securing sails when not in use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H9/00—Marine propulsion provided directly by wind power
    • B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
    • B63H9/08—Connections of sails to masts, spars, or the like
    • B63H9/10—Running rigging, e.g. reefing equipment
    • B63H9/1021—Reefing
    • B63H9/1042—Reefing by furling around or inside the boom

Definitions

  • the present invention relates to a system for the furling of a mainsail of a sailing craft, in which the sail is lowered and collected in a cavity in a boom.
  • the mainsail normally carries relatively inflexible battens extending horizontally in the sail, and these cannot be rolled up around a vertical axis into the mast. Also, in order to receive the sail, the size and weight of the mast must be excessive, resulting in increased air turbulence and negative righting moment.
  • boom vangs which is a line or other device secured between the boom and the deck.
  • the vang is used to hold the end of the boom down when the boat is sailing on a reach, thereby presenting maximum sail area.
  • the vang is used only to control the shape of a flying sail and is not employed in connection with sail furling.
  • the boom is molded or formed from reinforced plastic or other materials, and the forward portion is hinged to the mast at spaced locations around axes substantially parallel to the mast.
  • the hinged arrangement holds the boom at a predetermined fixed angle of about 88 degrees to the mast to permit uniform furling of the sail into the boom.
  • the body of the boom is formed or molded with a decreasing cross section from the forward portion to the rear, in order to most efficiently accommodate the body of the furled sail. This combination of features renders the concept of boom furling more reliable and convenient.
  • the arrangement also eliminates the need for a separate support for the boom while the sail is lowered, such as a separate line, or topping lift, extending from the top of the mast to the rear of the boom.
  • the hinges may be installed on a vertical slide on the mast to enable the boom to move up and down, while retaining the fixed angle.
  • Figure 1 is a side view of a portion of a sailboat illustrating the boom and furling system of the present invention.
  • Figures 2 and 3 are sectional views of two different forms of the boom which may be employed.
  • Figure 4 is a side view showing a boom release feature.
  • Figure 1 illustrates the upper or deck portion of sailboat 10 on which an upright or vertical mast 82 is mounted in a conventional fashion.
  • the mast 82 is designed to carry the luff of a mainsail 92 in a conventional fashion, with the head of the sail being raised and lowered by a halyard 100.
  • the boom 80 is preferably made or formed from a molded plastic material reinforced with fiber such as carbon or glass. Metals such as aluminum any also be used.
  • the boom is of one piece construction have a main body, the forward portion of which is hinged at 12 and 14 around a vertical pin 17 secured from the mast.
  • the boom also includes an integral leg 16 extending downwardly on an angle from a lower medial portion of the boom toward a lower portion of the mast, with the end of the leg being hinged at 18 to the mast in a similar manner. Since the boom is hinged to the mast at spaced locations as shown, the angle of the boom to the mast is fixed, and this angle is set at the correct angle to allow the sail to be uniformly furled.
  • the angle of the boom to the mast is fixed in the order of 86° to 90°, and preferably at 89°. Movement of the mast is limited to sideways movement in a horizontal plane. More than two hinges may be employed, and the forward portion of the boom may be solid and continuous, rather than in the branched form as shown.
  • the boom may be hollow with a cone-shaped cavity 84, which decreases in cross-section from the forward to the rear portion. Since the boom may be made on a mold, the outer shape may be streamlined, and the internal cavity may be formed to more exactly fit the form of the furled sail.
  • the boom has an upper longitudinal slot 83 through which the sail and battens are received.
  • the furling mechanism itself may be conventional in nature and may include a shaft or rod 86 extending longitudinally and centrally in the boom cavity and includes a forward enlarged head, with the rear end of the rod being secured to the drum of a reel 95 located in the end 90 of the boom. Location of the drum in the rear of the boom is preferable so as not to interfere with the luff of the sail entering the boom cavity.
  • the foot of the sail is secured to the rod such that, as the rod is rotated, the sail is wound about the rod as shown in Figure 2.
  • a line 96 may be passed around a series of turning pulleys 99, 98 and 97 and wrapped around the reel 95.
  • the line 96 may be pulled from the cockpit to rotate the reel and the shaft in order to furl the sail while the halyard 100 is being lowered. Since the boom is supported at all times at a fixed angle, the mainsheet system 20, extending between the end of the boom and the deck, is employed only to control lateral movement of the boom.
  • FIG. 3 Another version of the boom is shown in Figure 3, in which the boom 40 has an upper widened U-shaped cavity for receiving the sail 114 as it is being furled, which in this case, is performed by folding the bottom of the sail back and forth into the cavity.
  • This arrangement may be preferable in the case of sails which contain battens 116 which would not otherwise be capable of roller furling. However, since the battens are normally all arranged at a fixed angle, the boom is held at the same angle to assure uniform furling regardless of which method is used.
  • Figure 4 illustrates a furling boom 22 in combination with other useful features.
  • the boom need not have a separate leg but may have a continuous solid forward portion 23, which is hinged to the mast at two or more locations 28.
  • Figure 4 also shows the possibility of allowing the boom to move up and down relative to the mast while still maintaining the desired constant angle required for furling. Such movement is desirable in making sail adjustments and also as a safety feature to relieve pressure on the mainsail in strong gusts.
  • the hinges 28 may be secured on cars 46 which are retained in slidable engagement on a track 48 secured to the rear of the mast 14. Upward movement of the mast 22 may be restrained by a line 50 connected to the lower car 46, the line being passed through a suitable turning block, with the free end of the line secured to a cleat. Normal pressure on the sail will exert an upward pressure on the boom, and sudden high pressures may be relieved by releasing the line 50.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Tents Or Canopies (AREA)
EP92101580A 1992-01-31 1992-01-31 Système d'enroulement de voile pour bateaux Withdrawn EP0553381A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92101580A EP0553381A1 (fr) 1992-01-31 1992-01-31 Système d'enroulement de voile pour bateaux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92101580A EP0553381A1 (fr) 1992-01-31 1992-01-31 Système d'enroulement de voile pour bateaux

Publications (1)

Publication Number Publication Date
EP0553381A1 true EP0553381A1 (fr) 1993-08-04

Family

ID=8209283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92101580A Withdrawn EP0553381A1 (fr) 1992-01-31 1992-01-31 Système d'enroulement de voile pour bateaux

Country Status (1)

Country Link
EP (1) EP0553381A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2301802A (en) * 1995-06-08 1996-12-18 Alan Ronald Orbison Motorised roller reefing of a yacht sail into the boom and the automatic raising and lowering of this sail
US9783276B2 (en) 2015-09-10 2017-10-10 Stephen Colgan Clement Sailing furler and method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB612193A (en) * 1946-05-17 1948-11-09 Wells Wintemute Wells Coates Improvements in or relating to sailing craft
US3749042A (en) * 1971-11-09 1973-07-31 P Jackson Furling and unfurling of sails
GB2195111A (en) * 1986-08-28 1988-03-30 Doyle Sailmakers Inc Sail handling system
US4811677A (en) * 1986-01-17 1989-03-14 Mp-Sejl A/S Rig for a sail carrying boat
FR2629044A1 (fr) * 1988-03-28 1989-09-29 Maillard Michel Enrouleur rigide de grand-voile
EP0396269A1 (fr) * 1989-04-12 1990-11-07 Ian Charles Howlett Méthode pour construire des espars tubulaires et appareil pour la réalisation de la méthode
GB2237546A (en) * 1989-11-02 1991-05-08 Offshore Instr Ltd Telescopic rod kicker for sailing vessel

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB612193A (en) * 1946-05-17 1948-11-09 Wells Wintemute Wells Coates Improvements in or relating to sailing craft
US3749042A (en) * 1971-11-09 1973-07-31 P Jackson Furling and unfurling of sails
US4811677A (en) * 1986-01-17 1989-03-14 Mp-Sejl A/S Rig for a sail carrying boat
GB2195111A (en) * 1986-08-28 1988-03-30 Doyle Sailmakers Inc Sail handling system
FR2629044A1 (fr) * 1988-03-28 1989-09-29 Maillard Michel Enrouleur rigide de grand-voile
EP0396269A1 (fr) * 1989-04-12 1990-11-07 Ian Charles Howlett Méthode pour construire des espars tubulaires et appareil pour la réalisation de la méthode
GB2237546A (en) * 1989-11-02 1991-05-08 Offshore Instr Ltd Telescopic rod kicker for sailing vessel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2301802A (en) * 1995-06-08 1996-12-18 Alan Ronald Orbison Motorised roller reefing of a yacht sail into the boom and the automatic raising and lowering of this sail
US9783276B2 (en) 2015-09-10 2017-10-10 Stephen Colgan Clement Sailing furler and method

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19930407

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Effective date: 19940913