EP0007906B1 - Crochet à élingue avec cliquet - Google Patents

Crochet à élingue avec cliquet Download PDF

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Publication number
EP0007906B1
EP0007906B1 EP19790900073 EP79900073A EP0007906B1 EP 0007906 B1 EP0007906 B1 EP 0007906B1 EP 19790900073 EP19790900073 EP 19790900073 EP 79900073 A EP79900073 A EP 79900073A EP 0007906 B1 EP0007906 B1 EP 0007906B1
Authority
EP
European Patent Office
Prior art keywords
latch
hook
stub
shank
tip
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
Application number
EP19790900073
Other languages
German (de)
English (en)
Other versions
EP0007906A1 (fr
Inventor
Edward J. Crook, Jr.
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.)
American Hoist and Derrick Co
Original Assignee
American Hoist and Derrick 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 American Hoist and Derrick Co filed Critical American Hoist and Derrick Co
Publication of EP0007906A1 publication Critical patent/EP0007906A1/fr
Application granted granted Critical
Publication of EP0007906B1 publication Critical patent/EP0007906B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/34—Crane hooks
    • B66C1/36—Crane hooks with means, e.g. spring-biased detents, for preventing inadvertent disengagement of loads

Definitions

  • This invention lies in the field of lifting hooks. More particularly, it concerns a design of lifting hook that has a spring-controlled latch across the throat of the hook, that is of forged construction, to provide ample strength.
  • Hooks used as parts of chains, or wire rope, slings usually have an eye or clevis-type of attachment construction. Many times the sling consists of two or more legs in order to adequately secure the load. Slings are constructed so that one or more legs are joined to a large ring or link. This link or ring is then the attachment point of the sling to the prime mover. It can be visualized that the sling can be used to be attached to all configurations of load by direct connection of the hook to the load, or in a choker situation. The sling will be slack at the time of attachment to the load, and keeping the hook connected to the load or in the choker configuration requires a latching device.
  • the hook may inadvertently become disengaged and, therefore, there is a necessity for a positive latching device. It is also apparent that, because the sling is a very portable apparatus, it is subject to much abuse of handling and, therefore, the hook latch must be of a substantial construction, the latch must be protected, and the contour of the hook and latch must avoid discontinuities that can snag on obstacles, and cause possible failures of the hook, cable, or lifting situation.
  • a hook according to the prior art part of claim 1 is known from US - A - 4 013 314. It is to be noted that the tip of the body portion extends outwardly of the latch when this is closed and can easily snag or foul against stationary objects during the lifting operation. Furthermore a sideways load on the free end of the latch may exert excessive loads on the latch pivot.
  • FIGURES 1 and 2 there is shown a side and front elevation of the latched hook, respectively.
  • the hook is of J-shaped construction, which is conventional in the industry.
  • the upper portion provides a ring 13, which encloses an eye 14 or a vertical shaft through which a cable or clevis can be attached for supporting the hook.
  • the J portion of the hook continues upwardly to a tip 20, leaving an open mouth to the hook, with a throat space having an internal surface 36.
  • the mouth of the hook is closed, in the operating condition, by a latch or catch, indicated generally by the numeral' 32.
  • This latch is hingedly supported by a pin 26 at its first end, and is urged outwardly by a spring 44, which closes the mouth of the hook, between the ring portion 13 and the tip 20.
  • a smooth contour is provided from the top of the ring 13 along a sloping ridge 30 along the outer surface 60 of the latch and down the outer surface of the tip of the hook.
  • the hook is of forged manufacture and embodies a, more or less, continually varying cross-sectional shape, and area, for purposes of conserving the mechanical strength of the hook while minimizing the weight of the hook, and the amount of material required.
  • FIGURES 1 A, 1 B, 1 C, 1 D, 1 E, 1 F, 1 G, 1 H and 1 These cross-sections are taken across the corresponding planes A-A, B-B, C-C, D-D, E-E, F-F, G-G, H-H, and I-I.
  • the cross-section in the lower portion of the hook which has a relatively wide throat 48, has a bearing surface 36, which is broad and of relatively long radius of curvature. The purpose of this is to provide broad-based support for a cable that is hooked over the tip of the hook, and supported on the surface 36.
  • the cross-section shown in FIGURE 1 A illustrates this broad curved portion 36 having a width out to the extremities 38. The cross-section then narrows to a neck 40 and to rib 18, which extends for a substantial length of the cross-section, to provide a stiffening for the hook, so that the load pulling down on the surface 36 will not bend the tip 20 in a downward direction.
  • the width of the portion 38-38 and the length 36-42 are of the required strength of the hook, to minimize the deformation of the hook under load. This is shown by the FIGURES 1 1 A and 1B.
  • FIGURES 1 C and 1 D the shank 16 narrows, and a rib 24 forms as previously described. Because of the small size and closed perimeter of the ring 13, a reduced cross-sectional area can be provided, FIGURE 1 E.
  • a wide shelf 34 of the shank so as to protect the latch.
  • This is provided with sizeable fillets on the top, and a sloping rib 30 so as to provide a non- snagging condition of the shelf 34.
  • a short post or stub extension 22 On the top of the tip 20 there is a short post or stub extension 22. This is for the purpose of locking the latch against outward movement under the urging of the spring, and also, because of the construction of the latch, it also permits the latch to resist sidewise movement, which might otherwise deform the latch, and cause it to open the mouth of the hook.
  • FIGURES 3A, 3B, 3C, and 3D there is shown a side elevation 3A, a top plan view 3C, an end view 3B, and a sectional 3D, taken across the planes C-C, B-B, and D-D, respectively.
  • the construction of the latch comprises a plane base portion 50 of selected length and width. There are two downwardly depending ribs 52 and 54 attached to the base 50 and there are two upwardly rising ribs 56 and 58.
  • the top contour is a, more or less, sloping surface 60, which encloses a groove 62 between the ribs 56 and 58.
  • the channel 64 having the ribs 52 and 54 spaced apart, is provided to swing over the rib 24 of the shank of the hook against the spring pressure 44, in order to open the mouth of the hook. This condition is shown in FIGURE 1 by the dashed outline 32', showing a width of mouth opening indicated by the dimension 46.
  • the hook is also designed with an improved shape and cross-section in order to provide a wider bearing surface for a cable sling that might be hooked over the tip of the hook, and to provide adequate strength to resist deformation under excess load.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)

Abstract

Le croc a elingue antisalissure (10) avec cliquet (32) comprend une crosse forgee (12), conformee de facon a presenter une grande surface courbe dans le cou (48) du croc afin de menager une bonne surface de soutien pour un cable. Une disposition amelioree du croc (10) et du cliquet (32) qui, en position fermee, enfourche une partie saillante (22) de l'extremite (20) du croc, et resiste ainsi a tout mouvement exterieur ou lateral du cliquet. Celui-ci est aussi conforme de facon a former un contour uni avec la surface exterieure et l'extremite du croc afin de presenter des proprietes antisalissures.

Claims (3)

1. Crochet de levage an J (10) pour élingues, comportant une queue (16) solidaire d'un corps (12) entourant une ouverture (48) et s'étendant vers le haut jusqu'à une extrémité (20, 22) en délimitant un passage ouvert (46) entre ladite extrémité (22) et ladite queue (16), ledit passage étant destiné à être fermé par un cliquet (32) articulé (28) à l'intérieur du crochet, à l'une de ses extrémités, autour d'un goujon (26) supporté par ladite queue et qui peut pivoter d'une position fermée à une position ouverte, des moyens élastiques (44) qui poussent normalement ledit cliquet en travers dudit passage à la position fermée, ledit cliquet étant réalisé sous la forme d'une plaque rectangulaire présentant, à sa face interne, des joues parallèles espacées (52, 54) délimitant une première gorge qui peut chevaucher ladite queue lorsque ledit cliquet occupe sa position d'ouverture complète, caractérisé par le fait que l'extrémité (20, 22) comporte, à sa zone extrême, une surface plane et une protubérance (22) qui s'étend vers le haut à partir de ladite surface plane, la section de cette protubérance (figure 1 G) étant plus petite que la section de la surface plane afin de ménager un espace sur chaque face latérale de la protubérance, le cliquet présentant une paire de nervures parallèles espacées (56, 58) qui font saillie vers l'extérieur le long de la face externe de la plaque rectangulaire et qui, lorsque le cliquet est en position fermée, chevauchent et emprisonnent la protubérance, ladite plaque rectangulaire (50) butant alors contre la face de cette protubérance située du côté du passage, de telle sorte qu'aucune région de ladite protubérance, ni les régions de la surface plane en contact avec les faces latérales de la protubérance, ne s'étendent à l'extérieur des nervures parallèles.
2. Crochet selon la revendication 1, caractérisé par le fait qu'une saillie (24) est ménagée le long de la face de la queue orientée vers l'ouverture, cette saillie étant chevauchée par les joues parallèles lorsque le cliquet est en position ouverte.
3. Crochet selon la revendication 1, caractérisé par le fait qu'il comporte un oeillet qui, faisant partie de la queue, présente une zone supérieure circulaire raccordée à des zones latérales inclinées vers le bas et vers l'intérieur, jusqu'à un point de jonction curviligne au fond entre le deux.
EP19790900073 1977-12-15 1979-07-16 Crochet à élingue avec cliquet Expired EP0007906B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US86086377A 1977-12-15 1977-12-15
US860863 1977-12-15

Publications (2)

Publication Number Publication Date
EP0007906A1 EP0007906A1 (fr) 1980-02-06
EP0007906B1 true EP0007906B1 (fr) 1982-07-07

Family

ID=25334215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790900073 Expired EP0007906B1 (fr) 1977-12-15 1979-07-16 Crochet à élingue avec cliquet

Country Status (4)

Country Link
EP (1) EP0007906B1 (fr)
DE (1) DE2857269C1 (fr)
GB (1) GB2036157B (fr)
WO (1) WO1979000396A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2531870B1 (fr) * 1982-08-18 1985-06-28 Contat Freres Ets Mousqueton, notamment pour l'alpinisme, et son procede de fabrication
SE447695B (sv) * 1984-07-23 1986-12-08 Mats Ingvar Davidsson Anordning for fasthallning av foremal
NL8901365A (nl) * 1989-05-30 1990-12-17 Johannes Gerhardus Christianus Transporthaak bestemd voor een overhead-transporteur.
GB2417286A (en) * 2004-08-19 2006-02-22 Heightec Group Ltd Gated hook with rope guide
US10647551B1 (en) 2018-10-25 2020-05-12 Ulven Forging Incorporated Rope hook assembly having a latch member

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1324676A (en) * 1919-12-09 Safety-hook
US1525292A (en) * 1924-03-21 1925-02-03 Edgar E Greve Safety hook
US2764792A (en) * 1951-04-11 1956-10-02 Raymond P Mansfield Pelican type mooring hook
US2657446A (en) * 1951-07-09 1953-11-03 Tom R Roberts Safety snap hook
GB804454A (en) * 1956-10-16 1958-11-19 William Henry Cruse Improvements in or relating to hoisting or the like hooks
US3261636A (en) * 1964-04-15 1966-07-19 Pierre Henry St Clevis and grab hook
CH422266A (de) * 1965-04-20 1966-10-15 Gis Ag Maschinen Und Apparatef Haken mit Sicherungsklinke
US3575458A (en) * 1969-02-27 1971-04-20 American Hoist & Derrick Co Hook and latch with lock
DE1932802C3 (de) * 1969-06-27 1981-08-27 Fritz 6685 Schiffweiler Leh Sicherheitshaken
DE2513798A1 (de) * 1974-03-29 1975-10-09 Archer Jean Francois Lasthaken mit sperrklinke
US4039220A (en) * 1976-05-04 1977-08-02 Don R. Hinderliter, Inc. Latch for hoisting hook

Also Published As

Publication number Publication date
EP0007906A1 (fr) 1980-02-06
GB2036157A (en) 1980-06-25
GB2036157B (en) 1982-08-18
DE2857269C1 (de) 1985-01-17
WO1979000396A1 (fr) 1979-07-12

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