US3853084A - Dock and wharf fenders - Google Patents

Dock and wharf fenders Download PDF

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Publication number
US3853084A
US3853084A US00364118A US36411873A US3853084A US 3853084 A US3853084 A US 3853084A US 00364118 A US00364118 A US 00364118A US 36411873 A US36411873 A US 36411873A US 3853084 A US3853084 A US 3853084A
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dock
levers
wharf
fenders
members
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US00364118A
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English (en)
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M Kedar
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    • 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
    • B63C1/00—Dry-docking of vessels or flying-boats
    • B63C1/10—Centring devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/20—Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards
    • E02B3/26—Fenders
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

Definitions

  • the present invention relates to dock and wharf fenders comprising scissor-like moving pairs of lever mem' bers which are connected, at a common point, hingedly to a Wale, the opposite ends of each pair being connected in spaced relationship to one another to a longitudinal member which is adapted to be fixedly attached to the dock wall, these spaced ends of the pair of levers being slidingly connected with the longitudinal member and acting against rubber buffers 3,564,858 2/1971 Pogonowski 61/48 provided within or on the longitudinal member.
  • DOCK AND WHARF FENDERS The main function of a clock fender is to prevent ships and also the dock itself from being damaged during moving or berthing of a vessel. In all those cases where an absolute and most perfect control over the movement of the ship can be exercised and, in addition, under the most ideal conditions, a vessel might approach a dock and be berthed without previously striking the dock. However, such conditions are practically unattainable and it is almost impossible to dock a ship in that way since ideal conditions can never be reached. For this reason docks and wharf walls are provided with fenders which, in their simplest form, are horizontal and vertical strips of timber which are fastened to the face of the dock.
  • the present invention starts from the deliberation that the deflection of the rubber pieces constituting the fenders will be in a direction parallel to the face of the berth of the dock and due to a linkage system there would be present a rapid increase of the force acting from the ship on the fender and therefore the efficiency of the fender would become much greater.
  • a fender which comprises scissor-like moving pairs of lever members which are connected, at a common point, hingedly to a wale, the opposite end of each pair being connected in spaced relationship to one another to a longitudinal member which is adapted to be fixedly attached to the dock wall, these spaced ends of the pair of levers being slidingly connected with the said longitudinal member and acting against rubber buffers provided within or on the said longitudinal member.
  • FIG. 1 is a schematic sketch illustrating the forces in such an arrangement
  • FIG. 2 is a plan view of a fendering system according to the invention
  • FIG. 3 is a like view of a slightly different practical embodiment of the new fendering system.
  • FIG. l this will explain the theoretical basis of an arrangement according to the invention.
  • the external horizontal forces I perpendicular to the berth and exerted on the berth are equal to P tga (see FIG. 1), Tga decreases with the increase of P therefore, in spite of the big internal forces P the external forces P are comparatively small.
  • This fact makes the proposed fender specially suited to be installed in existing berths as well as new ones, and will increase the berthing capacity considerably without endangering the structure.
  • FIG. 2 to the dock wall or berth indicated by the letter B are affixed a number of rigid longitudinal members 1. Near their ends these members are provided with elongated slots 2 in which can move pins 3. These vertical pins serve for connecting thereto the free ends of a pair of levers 4a and 4b. The opposite ends of each of the levers 4a and 4b are connected together at 5 by a vertical pin about which the levers can swing. To the said pin i.e., to the apex of the triangle formed by the levers 4a and 4b and fixed member 1 is attached by means of connectors 6 an elongated wale 7. Near the ends of each member 1 and enclosed in appropriate housings are provided rubber buffer 8 which bear against the ends of the levers 4a and 4b. The wale 7 is connected in this way to a number of pairs of levers, two of which are shown in FIG. 2.
  • a ship indicated by the letter S strikes against the wale 7 when being berthed, pushing the latter in the direction of the arrow a. This causes all levers 4a and 4b in a pair to spread apart, increasing the angle at the apex of the said triangle and forcing the opposite end of the levers 4a and 4b against the rubber buffers 8 thereby compressing the latter.
  • each lever unit there are provided two such members 1 and la.
  • the member 1 is affixed to the berth B in the same way as member 1 in FIG. 2, while the second member la, parallel to 1 is connected with the latter by means of crossing levers 40 and 400. These levers cross one another at superposed levels and are not connected at the crossing point.
  • the elongated slots 2 in which move the vertical pins 3 while rubber buffers 8 are provided at the ends of the levers 40 and 400.
  • To the members la is attached a wale 7 against which the ship S can be berthed.
  • An existing breasting dolphin of 45 ft. length has to its full length a cylindrical rubber fender of inches OD. v 7% inches ID. with a maximum deflection of 7% inches.
  • the energy absorptive capacity is 135,000 lb./ft. and the maximum horizontal force exerted on the dolphin from the docking ship is 202.5 tons for which load the dolphin was designed.
  • This dolphin is suitable to accomodate berthing ships of 70,000 ton displacement with an approaching speed of ft/min. (0.333 ft. per/sec.) normal to the berth. If Raykin fenders are to be installed, four units of R50 model will exert a horizontal'force of 190 and the maximal and energy abphin will not exceed 200 ton for which the dolphin was designed.
  • fenders comprising a first rigid longitudinalmember arranged to be affixed to and to extend I along a dock or wharf wall, a pair of elongated slots formed in said first member with each of said slots located adjacent an opposite one of the ends of said first member and extending in the longitudinal direction of said first member, a second rigid longitudinal member disposed in generally parallel relation with said first member and being spaced laterally from said first member so that it is located outwardly from the dock or wharf wall, a pair of elongated slots formed in said second member with'each of said slots located adjacent an opposite one of the ends of said second member and extending in the longitudinal direction of said second member, a pin associated with each of said slots in said first and second members with each said pin being freely movable through its associated said slot in the direction of said slot and with the axis of said pin extending transversely to the longitudinal axis of said member in which said slot is located, a first lever and a second lever arranged in separated and crossing relationship, said first and

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  • Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Bridges Or Land Bridges (AREA)
US00364118A 1972-05-26 1973-05-25 Dock and wharf fenders Expired - Lifetime US3853084A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IL39555A IL39555A (en) 1972-05-26 1972-05-26 Wharf and dock fenders

Publications (1)

Publication Number Publication Date
US3853084A true US3853084A (en) 1974-12-10

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US00364118A Expired - Lifetime US3853084A (en) 1972-05-26 1973-05-25 Dock and wharf fenders

Country Status (6)

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US (1) US3853084A (enrdf_load_stackoverflow)
JP (1) JPS4949397A (enrdf_load_stackoverflow)
DE (1) DE2326838A1 (enrdf_load_stackoverflow)
GB (1) GB1425884A (enrdf_load_stackoverflow)
IL (1) IL39555A (enrdf_load_stackoverflow)
NL (1) NL7307332A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4497593A (en) * 1982-10-13 1985-02-05 The B. F. Goodrich Company Floating structures
US4887934A (en) * 1988-10-31 1989-12-19 The B. F. Goodrich Company Impact absorbing device
WO1999046154A1 (en) * 1998-03-10 1999-09-16 Acta Maritime Development Corporation Container transfer terminal system and method
US20060042533A1 (en) * 2004-09-01 2006-03-02 Munro Robert A Watercraft mooring device
US20100287715A1 (en) * 2009-03-25 2010-11-18 Voyiadjis George Z Fenders for Pier Protection Against Vessel Collision
CN102295063A (zh) * 2011-05-26 2011-12-28 中国海洋石油总公司 大型海洋结构物碰撞缓冲装置
US20150360888A1 (en) * 2013-01-08 2015-12-17 CATAC CAPITAL GmbH Impact buffer
US20160340848A1 (en) * 2015-05-21 2016-11-24 Sharon Kedar Marine Fender System
CN107117273A (zh) * 2017-04-27 2017-09-01 浙江海洋大学东海科学技术学院 液压辅助停泊设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2605404C3 (de) * 1976-02-09 1978-12-07 Mannesmann Ag, 4000 Duesseldorf Fender für Stahlrohrdalben
JPS5516469A (en) * 1978-07-21 1980-02-05 Nec Corp Method of producing semiconductor device
JPS5674964A (en) * 1979-11-24 1981-06-20 Matsushita Electronics Corp Transistor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1031969A (fr) * 1951-02-02 1953-06-29 Neyret Beylier & Piccardpictet Perfectionnements aux amortisseurs de chocs de navires
DE1088432B (de) * 1959-06-11 1960-09-01 Gruen & Bilfinger Ag Fender fuer Kaimauern
US3459004A (en) * 1967-04-27 1969-08-05 Gomma Antivibranti Applic Wharf with a shock-absorbing device
US3564858A (en) * 1969-04-01 1971-02-23 Texaco Inc Boat landing for offshore structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1031969A (fr) * 1951-02-02 1953-06-29 Neyret Beylier & Piccardpictet Perfectionnements aux amortisseurs de chocs de navires
DE1088432B (de) * 1959-06-11 1960-09-01 Gruen & Bilfinger Ag Fender fuer Kaimauern
US3459004A (en) * 1967-04-27 1969-08-05 Gomma Antivibranti Applic Wharf with a shock-absorbing device
US3564858A (en) * 1969-04-01 1971-02-23 Texaco Inc Boat landing for offshore structure

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4497593A (en) * 1982-10-13 1985-02-05 The B. F. Goodrich Company Floating structures
US4887934A (en) * 1988-10-31 1989-12-19 The B. F. Goodrich Company Impact absorbing device
WO1999046154A1 (en) * 1998-03-10 1999-09-16 Acta Maritime Development Corporation Container transfer terminal system and method
US6524050B1 (en) 1998-03-10 2003-02-25 Acta Maritime Development Corporation Container transfer terminal system and method
US20060042533A1 (en) * 2004-09-01 2006-03-02 Munro Robert A Watercraft mooring device
US7100527B2 (en) * 2004-09-01 2006-09-05 Robert Alexander Munro Watercraft mooring device
US20100287715A1 (en) * 2009-03-25 2010-11-18 Voyiadjis George Z Fenders for Pier Protection Against Vessel Collision
US8484787B2 (en) * 2009-03-25 2013-07-16 Board Of Supervisors Of Louisiana State University And Agricultural And Mechanics College Fenders for pier protection against vessel collision
CN102295063A (zh) * 2011-05-26 2011-12-28 中国海洋石油总公司 大型海洋结构物碰撞缓冲装置
US20150360888A1 (en) * 2013-01-08 2015-12-17 CATAC CAPITAL GmbH Impact buffer
US9745152B2 (en) * 2013-01-08 2017-08-29 CATAC CAPITAL GmbH Impact buffer
US20160340848A1 (en) * 2015-05-21 2016-11-24 Sharon Kedar Marine Fender System
US9765494B2 (en) * 2015-05-21 2017-09-19 Sharon Kedar Marine fender system
CN107117273A (zh) * 2017-04-27 2017-09-01 浙江海洋大学东海科学技术学院 液压辅助停泊设备

Also Published As

Publication number Publication date
NL7307332A (enrdf_load_stackoverflow) 1973-11-28
IL39555A (en) 1974-01-14
JPS4949397A (enrdf_load_stackoverflow) 1974-05-13
GB1425884A (en) 1976-02-18
IL39555A0 (en) 1972-07-26
DE2326838A1 (de) 1973-12-20

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Little SOME DESIGNS FOR FLEXIBLE FENDERS.
JPH0321397B2 (enrdf_load_stackoverflow)