US3547067A - Device for raising an anchor - Google Patents

Device for raising an anchor Download PDF

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Publication number
US3547067A
US3547067A US779122A US3547067DA US3547067A US 3547067 A US3547067 A US 3547067A US 779122 A US779122 A US 779122A US 3547067D A US3547067D A US 3547067DA US 3547067 A US3547067 A US 3547067A
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US
United States
Prior art keywords
anchor
vessel
drum
cable
force
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 - Lifetime
Application number
US779122A
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English (en)
Inventor
Frederik J Jonkman
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.)
NEDERLANDSE OFFSHORE CO
Nederlandse Voor Werken Buitengaats Netherlands Offshore Co Nv Mij
Original Assignee
NEDERLANDSE OFFSHORE CO
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 NEDERLANDSE OFFSHORE CO filed Critical NEDERLANDSE OFFSHORE CO
Application granted granted Critical
Publication of US3547067A publication Critical patent/US3547067A/en
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
    • 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
    • B63C7/02—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects in which the lifting is done by hauling
    • B63C7/04—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects in which the lifting is done by hauling using pontoons or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/22—Handling or lashing of anchors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers

Definitions

  • the present invention provides an apparatus that will allow ships to raise anchors without the use of a secondary vessel or the accompanying dangers of conventionally hauling the anchor up itself. Further it will greatly reduce the danger of raising the anchor when a secondary ship, as a tug, is used. This is accomplished by providing a rotating drumthat will multiply the force exerted by the ship and positioning this rotating drum on abuoyant platform that has been buoyantly designed to incrementally increase the buoyant force as the platform is submerged. The fact that the floating platform can be submerged removes the danger created by high waves and in fact uses the waves to loosen the anchor.
  • the float generally has a construction that tapers in its downward direction, for example a reversed pyramid or cone shape. This unique construction allows the vessel to simply secure the line to the buoyant platform and then proceed on its destination, thus allowing a ship to reposition itself or embark with only a minimum amount of time. The foregoing is a desirable feature both with respect to .time and with removing a ship from a position of danger.
  • the rotating drum which is a simple form-of winchcan be motivated by an independent source of power, but in its preferred embodiment, it uses the cable that attaches the buoyant float with the vessel. With this arrangement any force exerted on the cable by the vessel will rotate the drum and cause the line attached to the anchor and the small end of the rotating drum to be raised.
  • the invention provides the additional advantage that the vessel is increasing the distance between itself and the floating platform and by so doing minimizes the possibilities of colliding with it.
  • FIG. 1 is a diagrammatic layoutof the invention showing the relationship of the vessel and the anchor;
  • FIG. 2 is a perspective view with a section removed to show the relationship of the rotating drums with the various anchor lines.
  • the anchor 2 is shown resting in a secured position on the bottom of the sea.
  • the anchor is secured by an anchor chain 3 to the main vessel (not shown) and secured to the floating structure 6 by the combination of a cable 4 and chain 5.
  • the securing line could consist entirely of a cable or a chain, but the preferred embodiment uses the combination of both.
  • the securing line is attached to the means for hoisting the anchor, indicated at 7.
  • This hoisting means 7 consists of a pocketed sheave 8 and a rope drum 9 disposed on the same axis.
  • the chain 5 has been guidedto and from the pocketed sheave 8, via guiding shells l and 11, respectively.
  • the chain is provided with stoppers 12 and 13 for limiting the travel of the chain.
  • a rope drum disposed on the same axis as drum 9 could be used in lieu of the pocketed sheave.
  • a cable 14 is secured on the rope drum 9 and has a free end 1 supported on top of the water by pontoons 15 and 16. This arrangement facilitates the securing of cable 14 to the parent vessel or the secondary vessel 17.
  • the rope drum 9 has a diameter twice the size of the diameter of the pocketed sheave 8. This permits both a multiplication of force and further, operation of the secondary vessel 17 at a distance from the floating structure 6. This ratio, can be varied to meet subjective requirements.
  • the geometric configuration of the floating structure is preferrably designed to progressively displace more water as the floating structure is forced downward.
  • the preferred embodiment shown in FIGS. 1 and 2 uses an inverted pyramid shape to accomplish this progressively increasing displacement. Other shapes such as cones, spheres, etc. can be used.
  • the chain stopper 13 may be constructed as a weight for compensating part of the weight of the anchor. This will permit the rate of fall of the anchor and consequently the rate at which the cable 14 is wound on the drum to be kept within reasonable bounds.
  • the tug or secondary vessel 17 would fasten itself to the line 14 and simply pull the line 14 in the particular direction that is desirable.
  • Line 14 will rotate the hoisting means 7 which will take up the slack in the anchor line until the line is taut.
  • the buoyant floating structure 6 will be progressively forced underwater and the force on the anchor line will vary with the water displaced by the floating structure 6. If a wavesubmerges part of the floating structure the secondary vessel will not be effected by this sudden increase in buoyant force, but rather the anchor will only be subjected to a smoother application of increasing force than has been possible in the conventional method.
  • An apparatus for raising an anchor comprising:
  • a. securing means capable of being attached to a vessel
  • an anchor attached to an anchor line, the anchor line consisting of a chain in its upper portion;
  • hoisting means including a drum engaging the securing means and a pocketed sheave driven by the drum and engaging the chain, the sheave having a smaller diameter than the drum;
  • a submergible buoyant structure supporting the hoisting means and containing a guide passage for the chain;
  • first and second stops on the chain cooperable with the adjacent ends of the guide passage to limit the travel of the chain, the first stop being of such a weight to balance a portion of the anchor weight to facilitate raising the anchor;
  • the hoisting means comprises a pocketed sheave; and b. the upper portion of the second cable comprises a chain engaged by the sheave.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Ropes Or Cables (AREA)
US779122A 1967-11-27 1968-11-26 Device for raising an anchor Expired - Lifetime US3547067A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6716116A NL6716116A (no) 1967-11-27 1967-11-27

Publications (1)

Publication Number Publication Date
US3547067A true US3547067A (en) 1970-12-15

Family

ID=19801832

Family Applications (1)

Application Number Title Priority Date Filing Date
US779122A Expired - Lifetime US3547067A (en) 1967-11-27 1968-11-26 Device for raising an anchor

Country Status (3)

Country Link
US (1) US3547067A (no)
GB (1) GB1246991A (no)
NL (1) NL6716116A (no)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913514A (en) * 1973-10-25 1975-10-21 Lester A Reynolds Boat anchor retrieving method and apparatus
US3922990A (en) * 1974-08-15 1975-12-02 Jr Emile Menard Method and apparatus for raising and retrieving a boat anchor
FR2362748A1 (fr) * 1976-08-27 1978-03-24 Doris Dev Richesse Sous Marine Procede et dispositif de relevage de corps immerges
EP0137886A1 (en) * 1983-09-14 1985-04-24 Angelo Iaccarino Floating device for raising the anchor of small boats
US4552086A (en) * 1981-09-28 1985-11-12 Geophysical Company Of Norway A/S Float arrangement
EP0820927A3 (en) * 1996-07-24 1998-10-21 Ugland Engineering AS Mooring systems
US20110092115A1 (en) * 2008-05-19 2011-04-21 Single Buoy Moorings Inc. Disconnectable turret mooring system with a weighted riser-supporting buoy
CN112319700A (zh) * 2020-11-17 2021-02-05 厦门天吴海洋科技有限公司 一种母船无锚机的抛锚方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113911290B (zh) * 2021-11-12 2023-05-02 中国科学院海洋研究所 用于坐底式海床基观测***失浮后的打捞装置及方法

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913514A (en) * 1973-10-25 1975-10-21 Lester A Reynolds Boat anchor retrieving method and apparatus
US3922990A (en) * 1974-08-15 1975-12-02 Jr Emile Menard Method and apparatus for raising and retrieving a boat anchor
FR2362748A1 (fr) * 1976-08-27 1978-03-24 Doris Dev Richesse Sous Marine Procede et dispositif de relevage de corps immerges
US4552086A (en) * 1981-09-28 1985-11-12 Geophysical Company Of Norway A/S Float arrangement
EP0137886A1 (en) * 1983-09-14 1985-04-24 Angelo Iaccarino Floating device for raising the anchor of small boats
EP0820927A3 (en) * 1996-07-24 1998-10-21 Ugland Engineering AS Mooring systems
US20110092115A1 (en) * 2008-05-19 2011-04-21 Single Buoy Moorings Inc. Disconnectable turret mooring system with a weighted riser-supporting buoy
CN112319700A (zh) * 2020-11-17 2021-02-05 厦门天吴海洋科技有限公司 一种母船无锚机的抛锚方法

Also Published As

Publication number Publication date
NL6716116A (no) 1969-05-29
GB1246991A (en) 1971-09-22

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