EP0414321A1 - Bossoir basculant pour canots à chute libre - Google Patents

Bossoir basculant pour canots à chute libre Download PDF

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Publication number
EP0414321A1
EP0414321A1 EP90202237A EP90202237A EP0414321A1 EP 0414321 A1 EP0414321 A1 EP 0414321A1 EP 90202237 A EP90202237 A EP 90202237A EP 90202237 A EP90202237 A EP 90202237A EP 0414321 A1 EP0414321 A1 EP 0414321A1
Authority
EP
European Patent Office
Prior art keywords
cradle
arm
davit
boat
hoisting
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.)
Granted
Application number
EP90202237A
Other languages
German (de)
English (en)
Other versions
EP0414321B1 (fr
Inventor
Jacobus Van Drunen
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.)
SCHAT-DAVIT Co BV
Original Assignee
SCHAT-DAVIT Co BV
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 SCHAT-DAVIT Co BV filed Critical SCHAT-DAVIT Co BV
Publication of EP0414321A1 publication Critical patent/EP0414321A1/fr
Application granted granted Critical
Publication of EP0414321B1 publication Critical patent/EP0414321B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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 
    • B63B23/00—Equipment for handling lifeboats or the like
    • B63B23/28—Devices for projecting or releasing boats for free fall

Definitions

  • This invention relates to launching apparatus for a free-­fall boat with a sloping launching cradle at a board or side of a ship or offshore structure, on which a lifeboat can be releasibly locked.
  • a veering and hoisting tackle is needed both for lowering the boat onto the water in a controlled manner and for hoisting it and placing it on the cradle.
  • said cradle is mounted for tilting movement and when its lock has been released can be tilted between an inwardly tilted position, in which the cradle occupies a stand-by position sloping away from the board or side of a ship or offshore structure and an outwardly tilted position in which said cradle extends substantially downwardly along the outboard side, said tiltable cradle constituting part of a davit which, in the outwardly tilted position of the cradle, can be operative to raise or lower a free-fall boat, said cradle being connected at a fixed angle to a hoisting/veering arm and the davit assembly constituted by said cradle and said arm being hingedly mounted along the board or side of a ship or offshore structure with the centre of gravity of the assembly being located outboard of the hinge, the davit being tiltable between an inward end position, in which the cradle is in a lockable, sloping stand-by position, and
  • the boat For the free-fall launching of a boat, there is no difference with prior equipment. If, however, it is desired for the boat to be lowered in a controlled manner, it is attached to the davit, the cradle is tilted away from under the boat, and the boat is lowered by the davit.
  • the boat When the option is for the controlled launching of a boat locked on the cradle, the boat is fastened to a winch rope or cable passed over the head of the hoisting/veering arm.
  • the davit is tilted to the forward position, in which the cradle extends vertically downwards along the side. During this tilting movement, the boat's weight is taken over by the hoisting rope or cable, and after the cradle has been tilted away from under the boat, the boat can be launched by veering.
  • the apparatus comprises a winch whose rope or cable is passed to the head of the hoisting/veering arm, and which winch is so adjustable, in conjunction with the positive torque acting on the davit due to the location of the centre of gravity relative to the hinge, that both with and without a boat being placed on the cradle, the davit tilts to its outboard end position under the control of the brake of the winch when the cradle is unlocked.
  • a suspension block of such a weight that the block only, without any load being carried by it, is capable of veering the winch rope or cable.
  • the winch rope or cable will be paid out further under the influence of the weight of the suspension block, and the tension in the hoisting cable or rope will be released, so that the block can be readily detached from the boat.
  • Another advantage of this feature is that, for example in boat drills, when a boat is water-born, it is possible, without driving the winch in a veering sense, to lower the suspension block for grappling the boat and hoisting it.
  • a stop for said block may be provided near the head of the hoisting arm, so that, in addition to the controlled outboard tilting of the assembly of cradle and hoisting/veering arm, the winch can also be used for tilting the assembly of cradle and hoisting/veering arm from the outward end position back to the inward end position.
  • the free-fall boat For the controlled launching of the free-fall boat, it is fastened to the hoisting block, uncoupled from the cradle, and during the outward tilting movement the boat is automatically lifted off its cradle.
  • the resultant of the rope forces acting on the hoisting arm may be such relative to the hinge that the davit is kept in the inward tilted position, and the cradle bars the boat from being lowered further.
  • the boat By providing the hoisting arm with a catch, in accordance with the present invention, which catch is operative to support the block through a limited tilting angle of the arm, the boat can be temporarily suspended from the catch, until the assembly of davit and the boat hanging above the cradle tilts to the outboard position.
  • the catch which may take the form of a hook projecting from the arm, may be so dimensioned that, after a tilting movement of the davit assembly which moves the cradle outside the launching path of the boat, the hoisting block is no longer supported by the hook, and the boat can be veered.
  • the tilting davit can also be used for correcting the cradle slope at various list positions.
  • the sloop is attached through so-called bridles 11 to the eyelet 12 of a hoisting block 13, which through a stop 14 is fastened to a cable 16 of a winch 17, passed over rollers 15.
  • a hook-shaped catch 19 extends a small distance outwardly from hoisting/veering arm 6.
  • the hoisting/veering arm 6 In the inwardly tilted position of davit 3 (see Fig. 1 and Fig. 3A), the hoisting/veering arm 6 is directed virtually vertically, and block 13 rests upon catch 19.
  • the weight of the (manned) sloop 7 is transmitted through block 13 to catch 19.
  • Block 13 is sufficiently heavy for cable 16 to be veered even without carrying the sloop. This is of importance in connection with the possibility of practicing with the tiltable gravity davit and a free-fall boat, which requires the sloop to be repeatedly hauled out of the water and re-­installed on the cradle.
  • the winch 17 then pulls davit 3 inwards, and sloop 7 comes to hang a short distance above the cradle 4, which has returned into its stand-by position.
  • cradle 4 has again been locked (at 9)
  • the sloop can be lowered onto the cradle and locked relative to cradle 4.
  • the davit When a sloop has been lowered in a controlled fashion and has to be hoisted up, the davit is already in the outboard position shown in Fig. 2 and the block can be directly coupled to the water-born sloop.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Jib Cranes (AREA)
  • Bridges Or Land Bridges (AREA)
  • Emergency Lowering Means (AREA)
EP19900202237 1989-08-21 1990-08-20 Bossoir basculant pour canots à chute libre Expired - Lifetime EP0414321B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8902103A NL8902103A (nl) 1989-08-21 1989-08-21 Kantelbare zwaartekrachtdavit voor vrije-valboot.
NL8902103 1989-08-21

Publications (2)

Publication Number Publication Date
EP0414321A1 true EP0414321A1 (fr) 1991-02-27
EP0414321B1 EP0414321B1 (fr) 1993-11-24

Family

ID=19855188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900202237 Expired - Lifetime EP0414321B1 (fr) 1989-08-21 1990-08-20 Bossoir basculant pour canots à chute libre

Country Status (7)

Country Link
EP (1) EP0414321B1 (fr)
DE (1) DE69004762T2 (fr)
ES (1) ES2046676T3 (fr)
FI (1) FI904145A0 (fr)
NL (1) NL8902103A (fr)
NO (1) NO173223C (fr)
WO (1) WO1992015480A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101620917B1 (ko) * 2014-05-28 2016-05-13 대우조선해양 주식회사 자유낙하 구명정의 제동장치

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8902103A (nl) * 1989-08-21 1991-03-18 Schat Davit Bv Kantelbare zwaartekrachtdavit voor vrije-valboot.
CN105620669A (zh) * 2014-10-31 2016-06-01 无锡晟欧船舶设备有限公司 一种自由降落式救生艇降放装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3515544A1 (de) * 1985-04-30 1986-10-30 Neuenfelder Maschinenfabrik, 2101 Hamburg Vorrichtung zum aussetzen eines bootes vom heck eines schiffes, insbesondere eines freifallbootes
DE3534257A1 (de) * 1985-09-26 1987-04-02 Robert Hatecke Schiff mit einer schwenkbar angeordneten ablaufbahn fuer freifallboote

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8902103A (nl) * 1989-08-21 1991-03-18 Schat Davit Bv Kantelbare zwaartekrachtdavit voor vrije-valboot.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3515544A1 (de) * 1985-04-30 1986-10-30 Neuenfelder Maschinenfabrik, 2101 Hamburg Vorrichtung zum aussetzen eines bootes vom heck eines schiffes, insbesondere eines freifallbootes
DE3534257A1 (de) * 1985-09-26 1987-04-02 Robert Hatecke Schiff mit einer schwenkbar angeordneten ablaufbahn fuer freifallboote

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101620917B1 (ko) * 2014-05-28 2016-05-13 대우조선해양 주식회사 자유낙하 구명정의 제동장치

Also Published As

Publication number Publication date
NO173223B (no) 1993-08-09
FI904145A0 (fi) 1990-08-21
NO903671D0 (no) 1990-08-21
NO173223C (no) 1993-11-17
NL8902103A (nl) 1991-03-18
EP0414321B1 (fr) 1993-11-24
DE69004762D1 (de) 1994-01-05
WO1992015480A1 (fr) 1992-09-17
NO903671L (no) 1991-02-22
DE69004762T2 (de) 1994-04-14
ES2046676T3 (es) 1994-02-01

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