US3557737A - Chain stopper - Google Patents

Chain stopper Download PDF

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Publication number
US3557737A
US3557737A US775269A US3557737DA US3557737A US 3557737 A US3557737 A US 3557737A US 775269 A US775269 A US 775269A US 3557737D A US3557737D A US 3557737DA US 3557737 A US3557737 A US 3557737A
Authority
US
United States
Prior art keywords
chain
supporting surfaces
support
curvature
concave
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
US775269A
Other languages
English (en)
Inventor
August Hendrik Maria Smulders
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.)
IHC Holland NV
Original Assignee
IHC Holland NV
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 IHC Holland NV filed Critical IHC Holland NV
Application granted granted Critical
Publication of US3557737A publication Critical patent/US3557737A/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
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/18—Stoppers for anchor chains
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/39—Cord and rope holders
    • Y10T24/3902—Chain

Definitions

  • a chain stopper comprises a separable chaingrasping insert rotatably received in a conical recess in a body which is supported on oppositely outwardly extending trunnions that have concave supporting under surfaces curved on a relatively long radius of curvature and which rest on fixed convex supporting surfaces curved on a relatively short radius of curvature.
  • the present invention relates to chain stoppers, more par ticularly of the type for mooring buoys and the like. Chain stoppers of this general type are disclosed in US. Pat. No. 3,289,626, Dec. 6, I966.
  • Another object of the present invention is the provision of chain stoppers in which the relatively moving supporting surfaces do not become locked because of corrosion or fouling.
  • Still another object of the present invention is the provision of a chain stopper which imposes relatively little wear on the chain.
  • FIG. 1 is a cross-sectional view of achain stopper according to the present invention
  • FIG. 2 is a cross-sectional view of the structure of FIG. 1 but at a right angle to FIG. I;
  • FIG. 3 is a view similar to FIG. I but showing a chain and chain stopper according to the present invention swung into one position of use in full line and swung to other positions of use in phantom line.
  • a chain stopper according to the invention indicated generally at l and comprising an annular body 2 having a bore 3 therethrough whose sidewalls are conical.
  • Body 2 includes a frustoconical chain grasping assembly disposed in bore 3 comprising two separable elements 4 which together grasp between them a link 5a of a chain 5.
  • elements 4 also have cuplike depressions on their upper and lower sides for the accommodation of the next adjacent links of the chain 5.
  • the cross piece of the link 5a has been omitted in FIGS. 1 and 3 so as to avoid a confusing mass of lines.
  • Trunnions 7 extend horizontally outwardly from opposite sides of body 2. As best seen in phantom line in FIG. I, each trunnion 7 has the cross-sectional configuration generally of a truncated pyramid. The cross-sectional configuration of each trunnion 7 is constant from end to end thereof.
  • each trunnion 7 is formed as a bearing surface and is concave and partially cylindrical about a radius of curvature R shown in FIG. 3.
  • the bearing surface provided by surface 8 is thus in two sections disposed one on each side of body portion 2.
  • the two surfaces 8 are in alignment with each other.
  • Surfaces 8 rest on the convex upper surfaces of support members I0 rigidly secured to members 9 fixed on the buoy or other support.
  • These upper support surfaces of members I0 are part cylindrical about a radius of curvature which is substantially shorter than radius R.
  • FIG. 3 the relationships and function of the chain stopper of the present invention will become apparent.
  • the full-line position of the parts is assumed when a force is exerted on the chain in the direction of the arrow 11.
  • This arrow 11 when extended rearwardly, intersects the line of contact between the engaged supporting surfaces of trunnions 7 and support members I0. Also, the tangents to the curves of the supporting surfaces at this point of intersection on the line of contact overlie each other in FIG. 3 and are perpendicular to the direction of arrow 11.
  • the center of curvature of the surface 8 is disposed at the center I2 of that portion ofthe link 5a which is grasped by the element 4.
  • This section of link 5:: is the section which is contacted by the next link down the chain.
  • the chain stopper of the present invention always follows the direction of pull of the chain, so that any wear between the constrained chain link and the next link, as a'result of relative swinging of these links, is largely avoided. Wear on the chain is thus greatly reduced and fouling or blockage of the chain by virtue of corrosion or fouling is avoided.
  • the supporting surfaces roll on each other and do not slide; and of course it is known that rolling friction is considerably less than sliding friction. The absence of relative sliding movement means that there will be no slipping or jerking during operation and that the tension in the chain will remain substantially constant.
  • a chain stopper comprising a body adapted to grasp a chain, and a support on which saidbody is Supported, said body having supporting surfaces carried thereby which engage with supporting surfaces carried by said support to support said body for swinging movement relative to said support, the supporting surfaces carried by one of said body and support being convex and the supporting surfaces carried by the other of said body and support being concave; the improvement in which the radius of curvature of said convex supporting surfaces is substantially shorter than the radius of curvature of said concave supporting surfaces where said surfaces contact each other.
  • a chain stopper as claimed in claim 2 said body having stub shafts extending outwardly from opposite sides thereof, said concave surfaces being disposed on the under sides of said stub shafts.
  • a chain stopper as claimed in claim 1 in combination with a chain one of whose links is grasped by said body, said chain being comprised of a plurality of relatively swingable links disposed in planes alternately at right angles to each other, the center of curvature of said concave surfaces being at about the point of contact of the grasped link with the next link.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Chain Conveyers (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
US775269A 1967-11-14 1968-11-13 Chain stopper Expired - Lifetime US3557737A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL676715439A NL145331B (nl) 1967-11-14 1967-11-14 Kettingstopper.

Publications (1)

Publication Number Publication Date
US3557737A true US3557737A (en) 1971-01-26

Family

ID=19801714

Family Applications (1)

Application Number Title Priority Date Filing Date
US775269A Expired - Lifetime US3557737A (en) 1967-11-14 1968-11-13 Chain stopper

Country Status (7)

Country Link
US (1) US3557737A (de)
BE (1) BE723453A (de)
DE (1) DE1808535C3 (de)
ES (1) ES360145A1 (de)
FR (1) FR1592642A (de)
GB (1) GB1221252A (de)
NL (1) NL145331B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367982A (en) * 1980-09-04 1983-01-11 Mobil Oil Corporation Safety device for anchored marine structure
US6070548A (en) * 1996-09-20 2000-06-06 Single Buoy Moorings Inc. Vessel having quick disconnect means, and disconnect means for use in such a vessel
US6431102B1 (en) * 1998-09-03 2002-08-13 Den Norske Stats Oljeselskap A.S Apparatus for guiding and stopping an anchor chain on a floating structure
US20060213418A1 (en) * 2005-03-24 2006-09-28 Fmc Technologies, Inc. Dual-axis chain support assembly
US20100175604A1 (en) * 2009-01-15 2010-07-15 Boatman L Terry Dual axis chain support with chain pull through
US9199697B2 (en) 2013-10-02 2015-12-01 Sofec, Inc. Dual axis chain support with chain guide
US20160280333A1 (en) * 2013-11-15 2016-09-29 Dcns Fairlead for guiding an anchoring element
USD824118S1 (en) * 2016-09-01 2018-07-24 Feline Environmental Enrichment Design Corporation Pet feeding device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108609116B (zh) * 2018-05-17 2019-12-03 中船黄埔文冲船舶有限公司 一种锚链结构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1258580A (en) * 1917-01-30 1918-03-05 David J Lassiter Rope-clamp.
US3289626A (en) * 1965-08-19 1966-12-06 Mcdermott & Co J Ray Chain stoppers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1258580A (en) * 1917-01-30 1918-03-05 David J Lassiter Rope-clamp.
US3289626A (en) * 1965-08-19 1966-12-06 Mcdermott & Co J Ray Chain stoppers

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367982A (en) * 1980-09-04 1983-01-11 Mobil Oil Corporation Safety device for anchored marine structure
US6070548A (en) * 1996-09-20 2000-06-06 Single Buoy Moorings Inc. Vessel having quick disconnect means, and disconnect means for use in such a vessel
US6431102B1 (en) * 1998-09-03 2002-08-13 Den Norske Stats Oljeselskap A.S Apparatus for guiding and stopping an anchor chain on a floating structure
US20060213418A1 (en) * 2005-03-24 2006-09-28 Fmc Technologies, Inc. Dual-axis chain support assembly
US7325508B2 (en) 2005-03-24 2008-02-05 Sofec, Inc. Dual-axis chain support assembly
US20100175604A1 (en) * 2009-01-15 2010-07-15 Boatman L Terry Dual axis chain support with chain pull through
US7926436B2 (en) 2009-01-15 2011-04-19 Sofec Inc. Dual axis chain support with chain pull through
US9199697B2 (en) 2013-10-02 2015-12-01 Sofec, Inc. Dual axis chain support with chain guide
US20160280333A1 (en) * 2013-11-15 2016-09-29 Dcns Fairlead for guiding an anchoring element
US9975606B2 (en) * 2013-11-15 2018-05-22 Dcns Fairlead for guiding an anchoring element
USD824118S1 (en) * 2016-09-01 2018-07-24 Feline Environmental Enrichment Design Corporation Pet feeding device

Also Published As

Publication number Publication date
NL145331B (nl) 1975-03-17
DE1808535C3 (de) 1980-11-13
FR1592642A (de) 1970-05-19
ES360145A1 (es) 1970-07-01
BE723453A (de) 1969-05-06
DE1808535B2 (de) 1980-03-20
GB1221252A (en) 1971-02-03
DE1808535A1 (de) 1969-08-28
NL6715439A (de) 1969-05-19

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