US3842776A - Anchoring system - Google Patents

Anchoring system Download PDF

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Publication number
US3842776A
US3842776A US00419760A US41976073A US3842776A US 3842776 A US3842776 A US 3842776A US 00419760 A US00419760 A US 00419760A US 41976073 A US41976073 A US 41976073A US 3842776 A US3842776 A US 3842776A
Authority
US
United States
Prior art keywords
chain
wire rope
anchor
end connector
link
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
US00419760A
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English (en)
Inventor
D Wudtke
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.)
Skagit Corp
Oil States Industries Inc
Original Assignee
Skagit Corp
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 Skagit Corp filed Critical Skagit Corp
Priority to US00419760A priority Critical patent/US3842776A/en
Priority to CA206,879A priority patent/CA990084A/en
Publication of US3842776A publication Critical patent/US3842776A/en
Application granted granted Critical
Priority to NO743968A priority patent/NO135743C/no
Priority to GB47814/74A priority patent/GB1478990A/en
Priority to FR7437042A priority patent/FR2252246B1/fr
Priority to JP49135943A priority patent/JPS5085091A/ja
Priority to JP1978103163U priority patent/JPS5445678Y2/ja
Assigned to JONES AND LAUGHLIN INDUSTRIES, INC., A CORP. OF DE reassignment JONES AND LAUGHLIN INDUSTRIES, INC., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SKAGIT CORPORATION A CORP. OF DE
Assigned to CONTINENTAL EMSCO COMPANY, A CORP. OF DE. reassignment CONTINENTAL EMSCO COMPANY, A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: JONES AND LAUGHLIN INDUSTRIES INC.
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
    • B63B21/22—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
    • B63B21/04—Fastening or guiding equipment for chains, ropes, hawsers, or the like
    • B63B21/10—Fairleads
    • 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

  • An end connector member which joins the chain and wire rope cooperates with a special fairlead sheave having three concentric grooves-one for wire rope, one for chain, and an outside groove designed to mate with a curved surface on the end connector to assure that the wire rope, end connector and chain may all pass smoothly over the failead sheave without imposing kinking forces on the wire rope or excessive bending forces on the chain links.
  • the wire rope is stored on a drum driven by a winch.
  • Wire rope has better characteristics with respect to strength per unit length, but does not, alone, form a good suspension emans for an anchor of the type referred to above because it tends to impose upward forces on the anchor when unloaded.
  • Recent computer studies have indicated that an optimum suspension arrangement should include a length of chain attached to the anchor combined with a length of wire rope. This has been tried but has involved complications in retrieving the anchor and suspension means.
  • the chain is normally stored in a chain locker and is reeled in by means of a Windlass.
  • the wire rope is wound on a reel or drum by means of a winch, and it does not appear practical to store both on the same drum or storage means. Also, efforts to guide through the same fairlead structure have frequently subjected the wire rope to kinking or sharp bends not conducive to long life.
  • One approach to recovery of the anchoring structure has involved operating a winch on the platform to reel in substantially all of the wire rope, hooking on to the anchor or anchor chain by means of a hook or grapple suspended from a work boat and pulling the end of the chain or anchor up to the work boat.
  • the chain is then loaded into a chain locker on the work boat, and when the joint between the chain and wire rope is reached, this joint is disconnected and the remaining wire rope is reeled onto the drum on the platform and the remaining chain stored in the chain locker on the work boat.
  • This arrangement is quite cumbersome since each of four corners of the drilling platform may be tied down with three such anchor structures, making a total of twelve to be so recovered before the platform can be moved.
  • the sheave is also designed toprovide good support for the chain links and specifically to avoid substantial bending forces on the links.
  • This fairlead sheave has an inner groove which is of minimum diameter to limit the curvature of the wire rope to that which imposes acceptable stresses. The determination of such diameter is well within the skill of the art.
  • a second or intermediate groove has a broad base such that it essentially supports the links which lie flat against it, alternate links being oriented in the plane of the sheave and extending into the inner groove. It is desirable for the vertical links to bear on the wire rope groove if the proportions of the diameter of the wire rope and the diameter of the chain link are such that they are compatible. In this case the forces carried in the vertical links become largely tension forces which are more easily accommocated than the bending forces carried by links lying flat against the sheave.
  • An outer groove has a larger cross-section and is curved to mate with a bell-shaped end connector to which the chain is attached at its large end and the wire rope at its smaller end.
  • the large end has a surface in the form of a spherical segment which lies in the outer groove as it rotates around the sheave and prevents excessive bending of the wire rope at the point of contact with the end connector until the rope begins to wrap around the sheave.
  • the wire rope is reeled onto a drum by means of a winch mounted on the platform, thereby pulling the chain up adjacent the drum.
  • a load-retaining device in the form of a devils claw or similar device is then attached a few links below the end connector and the winch operatedytounload these few links, one of which is detachable, and transfer the load to the devils claw.
  • the detachable link is then disconnected and remains with the end connector, and a second detachable link at the end of a lead chain is lowered by means of a chain hoist and is connected to the upper link of anchor chain.
  • a single detachable link is disconnected from near the end connector and attached to the lead chain.
  • the chain hoist is then operated to wind in the chain, storing it in a chain locker on the platform, except for the length extending from the hoist to the anchor which is normally stored on a fixture on the side of the column just below the fairlead sheave.
  • the reverse process is used to deploy the anchor, chain and wire rope assembly.
  • the chain hoist winds the chain out until the detachable link is just above the devils claw, and the devils claw is attached to the chain.
  • the hoist is then operated to cause the load to be taken up by the devils claw and removed from the detachable link.
  • the detachable link is then opened and either remains with the lead chain or is attached to the end link of the few links extending from the end connector, if there is not a second detachable link attached thereto.
  • The'winch is then operated to remove the load from the devils claw, the devil's claw is disconnected, and the wire rope/chain assembly then reeled out as needed to cause the anchor to reach the ocean bottom.
  • FIG. 2 is a side view of a winch and chain hoistassembly mounted on one column of the above drilling platform, including a wire rope, anchor chain and fairlead assembly;
  • FIG. 3 is a view, partly in section and partly in phantom, of a fairlead sheave according to my invention
  • FIG. 4 is a sectional view taken along line 4-4 of FIG. 3;
  • FIG. 5 is a sectional view taken along line 55 of FIG. 3.
  • FIG. 1 is a perspective view of an offshore drilling platform of the type for which anchoring systems incorporating my invention are designed.
  • a deck 12 of substantial area such as approximately 260 feet by 320 feet, supports one or more buildings 14 for housing men and machinery, a number of cranes 16, and a drilling tower 18.
  • Drilling may take place in water up to 1500 feet deep or more with a drill shaft extending vertically downwardly from the tower 18 to a location on the ocean bottom which should be essentially directly below the tower.
  • Flotation for the platform is provided by a pair of large pontoons 22 which are ballasted such that they are submerged to a depth where the wave action is much less than at the surface.
  • the deck is supported on the pontoons by means of a plurality of columns 30.
  • the corner columns may be about 32 feet in diameter.
  • Extending from the corner columns are shown a plurality of anchors 24 attached by means of wire ropes 40, end connectors 54, and a length of anchor chain 60 connected to anchors 24.
  • FIG. 2 one of the columns for the offshore platform is shown at numeral 30.
  • a radially extending annular shelf structure 32 which is supported at various places by means of a plurality of trusses 34 fastened to the side wall of column 30.
  • a drum and chain hoist assembly mounted on a frame 36 which supports a large winchdriven drum 38 upon which is reeled a substantial length of wire rope 40.
  • a chain hoist 42 including a wildcat 44 driven by suitable motor means and which carries a length of lead chain 46. Chain extending from the left side of sheave 46 extends down into s chain locker, not shown.
  • a boss 48 supporting a short length of wire rope 50 which in turn is attached to a devils claw 52.
  • Wire rope 40 is firmly secured through a zinc poured socket or by other suitable means to a bell-shaped end connector 54 having an opening at its larger end and a cross-member for supporting a chain link 56.
  • Attached to link 56 is a detachable link 58 which is, in turn, attached to the anchor chain 60.
  • the devils claw 52 is affixed below one of the links of chain 60 such that any significant movement downwardly of the chain would cause the chain load to be transferred from the wire rope and the upper links of the chain to the devils claw 52.
  • the remaining length of chain 60 extends downwardly where it is directed around a fairlead sheave 62 and from there downwardly and outwardly to an anchor structure, not shown.
  • Fairlead 62 is pivotally attached to column 30 by means of a bracket 64 attached to the sidewall of column 30.
  • FIG. 3 is a view, partly in section, of the fairlead sheave 62 showing the arrangement whereby the chain 60, the end connector 54 and the wire rope 40 may all smoothly and conveniently pass across the fairlead sheave 62 without danger of either kinking the wire rope 40 or imposing substantial bending stress on the links of chain 60.
  • the wire rope 40, the end connector 54, and the chain 60 are shown in various positions typical of those which they assume as the assembly passes the fairlead sheave 62.
  • the wire rope 40 will first reach the sheave 62 where it falls naturally and smoothly into the inside groove 66 of said sheave.
  • the sheave 62 actually incorporates three separate grooves, on of which is the inside groove 66 designed to accommodate the wire rope 40, an intermediate groove 68 having a broad base for supporting links of chain 60 which are oriented perpendicularly to the plane of the sheave and a third groove 70 which is larger in diameter and has a curved configuration to mate with the spherical segment portion at the large diameter end of end connector 54.
  • end connector 54 makes contact with the internal surface of groove 70, it will be carried 'by'said groove around the periphery of the sheave 62 as shown in the successive phantom views.
  • the line contact becomes shorter and diminishes to a point on each side of the groove 70.
  • the wire rope 40 is pulled directly toward the right from the smaller end of member 54 and is not caused to bend until it begins to wrap around the groove 66.
  • the connector member 54 has been carried a substantial distance around the periphery of the sheave 62 and assumes a quite different angle-with respect to the sheave; however, the wire rope 40 still pulls directly outwardly from the small diameter end of member 54 and suffers no bending effect until it reaches the edge of groove 66.
  • member 54 In the third position of member 54 as it is rotated farther to the right, member 54 is now at a postion and oriented at an angle such that wire rope 40 is completely outside the periphery of sheave 62, and yet the force on it is such that it pulls straight away from the small diameter end of member 54. In the fourth position of member 54, this connector member is just at the point of being separated from contact with sheave 62 and wire rope 40 is still pulling directly outwardly from the small diameter end of member 54.
  • member 54 always assumes a position which permits the wire rope 40 to pull directly outwardly from the small diameter end thereof and never permits rope 40 to be subjected to a sharp genrfr-kink adjacent its point of entry into the mem
  • the large diameter end of member 54 includes an open chamber for receiving one end of link 56 which is secured to member 54 by means of a cross bar 72 whose center is even with the end of member 54.
  • FIG. 5 shows a sectional view of member 54 taken along line 55 of FIG. 3 such that the section shown in FIG. 5 is perpendicular to that shown in FIG. 3.
  • cross bar 72 is shown as extending across the center of the opening in the large diameter end of member 54 and shows the manner in which end link 56 is captured by bar 72. This arrangement limits, to some extent, the
  • end connector 54 is a spherical segment
  • other convex curvilinear shapes will be operable.
  • a conical shape is not recommended because of a tendency to wedge in the groove.
  • the arrangement of detachable links may vary as discussed above, or a disconnecting device may be combined with end connec tor 54.
  • An anchoring system for anchoring a structure comprising an anchor
  • said sheave including an inner groove for receiving said wire rope, an intermediate groove, and an outer groove having inner surfaces substantially mating with said convex curvilinear surface, said grooves being concentric along radii of said sheave.
  • a chain locker for storing said chain and a chain hoist with a length of lead chain
  • means including a detachable link for enabling said anchor chain to be detached from a link near said end connector and attached to said lead chain.
  • An anchoring system as set forth in claim 1 including a detachable link in said lead chain and a detachable link in said anchor chain, and wherein alternate links of said chain are at least partially supported in said inner groove.
  • a system for anchoring a structure in the sea including an anchor, an anchor chain, a wire rope and means connecting said wire rope to said anchor chain, drum and winch means for storing, retrieving and paying out said wire rope, a chain locker and a Windlass for retrieving and paying out chain from said chain locker including a length of lead chain, and a fairlead sheave for guiding said wire rope and said chain toward said drum, characterized in that said connecting means comprises an end connector of generally frusto-conical configuration with a convex curvilinear surface at its larger end and means in said larger end for receiving and retaining a link of said chain and with one end of said wire rope fastened to its smaller end,
  • said sheave including an inner groove for receiving said wire rope, an intermediate groove to at least partially support links of said chain, and an outer groove having inner surfaces substantially mating with said convex curvilinear surface, said grooves being concentric along radii of said sheave.
  • At least one detachable link is incorparated into said chain near said end connector whereby said anchor load may be transferred from said wire rope to said load-engaging member, said detachable link may be transferred to said lead chain, said windless may be actuated to take up the load from said loadengaging member allowing said member to be disconnected from said chain, and said chain may then be drawn into said chain locker.
  • An anchoring system for anchoring a structure in deep water comprising an anchor
  • an end connector member having a generally frustoconical configuration with a convex curvilinear surface at its larger end and a socket in said larger end, said socket including means for retaining a link of said chain;
  • an anchoring system for anchoring a structure including an anchor, an anchor chain, a wire rope, an end connector connecting said wire rope to said anchor chain, a drum and drum drive means for storing said wire rope, a chain locker and chain hoist means including a length of lead chain for storing said anchor chain,

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Earth Drilling (AREA)
US00419760A 1973-11-28 1973-11-28 Anchoring system Expired - Lifetime US3842776A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00419760A US3842776A (en) 1973-11-28 1973-11-28 Anchoring system
CA206,879A CA990084A (en) 1973-11-28 1974-08-13 Anchoring system
NO743968A NO135743C (en, 2012) 1973-11-28 1974-11-05
GB47814/74A GB1478990A (en) 1973-11-28 1974-11-05 Anchoring system and method
FR7437042A FR2252246B1 (en, 2012) 1973-11-28 1974-11-08
JP49135943A JPS5085091A (en, 2012) 1973-11-28 1974-11-28
JP1978103163U JPS5445678Y2 (en, 2012) 1973-11-28 1978-07-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00419760A US3842776A (en) 1973-11-28 1973-11-28 Anchoring system

Publications (1)

Publication Number Publication Date
US3842776A true US3842776A (en) 1974-10-22

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ID=23663641

Family Applications (1)

Application Number Title Priority Date Filing Date
US00419760A Expired - Lifetime US3842776A (en) 1973-11-28 1973-11-28 Anchoring system

Country Status (6)

Country Link
US (1) US3842776A (en, 2012)
JP (2) JPS5085091A (en, 2012)
CA (1) CA990084A (en, 2012)
FR (1) FR2252246B1 (en, 2012)
GB (1) GB1478990A (en, 2012)
NO (1) NO135743C (en, 2012)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967572A (en) * 1974-08-13 1976-07-06 Santa Fe International Corporation Anchoring system and chain stopper therefor
US3977181A (en) * 1974-03-21 1976-08-31 A/S Pusnes Mekaniske Verksted Linking members for connecting a rope and a chain
US3985093A (en) * 1975-04-30 1976-10-12 Armco Steel Corporation Chain-wire rope anchoring systems and anchoring systems and connectors therefor
US4020779A (en) * 1976-05-19 1977-05-03 Skagit Corporation Chain/wire rope connector assembly for anchor
US4034556A (en) * 1974-11-25 1977-07-12 A/S Pusnes Mekaniske Verksted Arrangement for controlling the engagement of a chain with a chain sheave, such as a cable lifter or wildcat
US4048945A (en) * 1976-05-07 1977-09-20 Chevron Research Company Removable anchor having retrievable ballast
US4411132A (en) * 1981-08-31 1983-10-25 The Crosby Group Wire rope to chain connector for anchoring systems
US4446807A (en) * 1981-06-10 1984-05-08 American Hoist & Derrick Company Mooring apparatus for floating vessels
EP0153007A3 (en) * 1984-02-17 1985-09-25 The Crosby Group, Inc. Wire rope to chain connector to anchoring systems
US4683834A (en) * 1985-04-30 1987-08-04 Mitsubishi Jukogyo Kabushiki Kaisha Wire chain connector
US4722293A (en) * 1984-10-25 1988-02-02 John T. Hepburn, Limited Integrated winch and windlass
FR2627244A1 (fr) * 1988-02-15 1989-08-18 Brissonneau & Lotz Systeme de connexion d'un cable et d'une chaine
US4878452A (en) * 1987-02-10 1989-11-07 Amca International Corporation Quick-release mooring apparatus for floating vessels
US5152245A (en) * 1990-08-20 1992-10-06 Roy Olsen Floatable ladder device
US5779226A (en) * 1996-03-15 1998-07-14 Wudtke; Donald J. Anchoring system
WO1998040306A1 (en) * 1997-03-14 1998-09-17 Bardex Engineering, Inc. Underwater self-aligning fairlead latch device for mooring a structure at sea
WO2003033938A1 (en) * 2001-10-18 2003-04-24 Grofsmederij Nieuwkoop B.V. Socket, and also anchorage line
US6817595B1 (en) * 2002-02-05 2004-11-16 Fmc Technologies, Inc. Swing arm chain support method
US20080005696A1 (en) * 2006-06-30 2008-01-03 Sharp Laboratories Of America, Inc. System and method for adjusting a media-playing set
US20100024706A1 (en) * 2008-08-01 2010-02-04 Keppel Offshore & Marine Technology Centre Pte. Ltd. System and Method for Mooring of Offshore Structures
CN103879514A (zh) * 2014-03-12 2014-06-25 黄山耀利水上设施有限公司 锚固装置
US8915205B2 (en) 2010-12-23 2014-12-23 Bardex Corporation Fairlead latch device
DE202019102683U1 (de) * 2019-05-13 2020-08-17 August Alborn Gmbh & Co. Kg Umlenkrolle für seil- oder kettenförmige Anschlagmittel
US10759628B2 (en) 2016-02-12 2020-09-01 Bardex Corporation Link coupler, chainwheel, and assembly thereof for coupling and moving chains of different sizes

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO151452C (no) * 1982-08-03 1986-10-21 Bergens Mek Verksted Anordning ved kjettingskive-kjetting-tausystem, samt klyss til bruk i anordningen.
JPS5932585A (ja) * 1982-08-17 1984-02-22 Hitachi Zosen Corp 浮体の係留装置
JPS6090089U (ja) * 1983-11-28 1985-06-20 三菱重工業株式会社 コンビネ−シヨンムアリング装置
JPH0532398Y2 (en, 2012) * 1985-01-31 1993-08-19

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977181A (en) * 1974-03-21 1976-08-31 A/S Pusnes Mekaniske Verksted Linking members for connecting a rope and a chain
US3967572A (en) * 1974-08-13 1976-07-06 Santa Fe International Corporation Anchoring system and chain stopper therefor
US4034556A (en) * 1974-11-25 1977-07-12 A/S Pusnes Mekaniske Verksted Arrangement for controlling the engagement of a chain with a chain sheave, such as a cable lifter or wildcat
US3985093A (en) * 1975-04-30 1976-10-12 Armco Steel Corporation Chain-wire rope anchoring systems and anchoring systems and connectors therefor
US4048945A (en) * 1976-05-07 1977-09-20 Chevron Research Company Removable anchor having retrievable ballast
US4020779A (en) * 1976-05-19 1977-05-03 Skagit Corporation Chain/wire rope connector assembly for anchor
US4446807A (en) * 1981-06-10 1984-05-08 American Hoist & Derrick Company Mooring apparatus for floating vessels
US4411132A (en) * 1981-08-31 1983-10-25 The Crosby Group Wire rope to chain connector for anchoring systems
EP0153007A3 (en) * 1984-02-17 1985-09-25 The Crosby Group, Inc. Wire rope to chain connector to anchoring systems
US4722293A (en) * 1984-10-25 1988-02-02 John T. Hepburn, Limited Integrated winch and windlass
US4683834A (en) * 1985-04-30 1987-08-04 Mitsubishi Jukogyo Kabushiki Kaisha Wire chain connector
US4878452A (en) * 1987-02-10 1989-11-07 Amca International Corporation Quick-release mooring apparatus for floating vessels
FR2627244A1 (fr) * 1988-02-15 1989-08-18 Brissonneau & Lotz Systeme de connexion d'un cable et d'une chaine
US5152245A (en) * 1990-08-20 1992-10-06 Roy Olsen Floatable ladder device
US5779226A (en) * 1996-03-15 1998-07-14 Wudtke; Donald J. Anchoring system
WO1998040306A1 (en) * 1997-03-14 1998-09-17 Bardex Engineering, Inc. Underwater self-aligning fairlead latch device for mooring a structure at sea
US5845893A (en) * 1997-03-14 1998-12-08 Bardex Engineering, Inc. Underwater self-aligning fairlead latch device for mooring a structure at sea
WO2003033938A1 (en) * 2001-10-18 2003-04-24 Grofsmederij Nieuwkoop B.V. Socket, and also anchorage line
US6817595B1 (en) * 2002-02-05 2004-11-16 Fmc Technologies, Inc. Swing arm chain support method
US20080005696A1 (en) * 2006-06-30 2008-01-03 Sharp Laboratories Of America, Inc. System and method for adjusting a media-playing set
US20100024706A1 (en) * 2008-08-01 2010-02-04 Keppel Offshore & Marine Technology Centre Pte. Ltd. System and Method for Mooring of Offshore Structures
US8047151B2 (en) * 2008-08-01 2011-11-01 Keppel Offshore & Marine Technology Centre Pte Ltd System and method for mooring of offshore structures
US8915205B2 (en) 2010-12-23 2014-12-23 Bardex Corporation Fairlead latch device
US9126659B2 (en) 2010-12-23 2015-09-08 Bardex Corporation Fairlead latch device
CN103879514A (zh) * 2014-03-12 2014-06-25 黄山耀利水上设施有限公司 锚固装置
US10759628B2 (en) 2016-02-12 2020-09-01 Bardex Corporation Link coupler, chainwheel, and assembly thereof for coupling and moving chains of different sizes
DE202019102683U1 (de) * 2019-05-13 2020-08-17 August Alborn Gmbh & Co. Kg Umlenkrolle für seil- oder kettenförmige Anschlagmittel

Also Published As

Publication number Publication date
JPS5445678Y2 (en, 2012) 1979-12-27
JPS5446496U (en, 2012) 1979-03-30
GB1478990A (en) 1977-07-06
NO743968L (en, 2012) 1975-06-23
FR2252246B1 (en, 2012) 1976-12-31
NO135743C (en, 2012) 1977-05-25
JPS5085091A (en, 2012) 1975-07-09
FR2252246A1 (en, 2012) 1975-06-20
NO135743B (en, 2012) 1977-02-14
CA990084A (en) 1976-06-01

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