EP0007906A1 - Crochet à élingue avec cliquet. - Google Patents

Crochet à élingue avec cliquet.

Info

Publication number
EP0007906A1
EP0007906A1 EP19790900073 EP79900073A EP0007906A1 EP 0007906 A1 EP0007906 A1 EP 0007906A1 EP 19790900073 EP19790900073 EP 19790900073 EP 79900073 A EP79900073 A EP 79900073A EP 0007906 A1 EP0007906 A1 EP 0007906A1
Authority
EP
European Patent Office
Prior art keywords
hook
shank
latch
tip
lifting hook
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.)
Granted
Application number
EP19790900073
Other languages
German (de)
English (en)
Other versions
EP0007906B1 (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

Links

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 con ⁇ struction. - Many times the sling consists of two or more legs in order to adequately secure the load. Slings are constructed so that the one or more legs are joined to a large ring or link. This link or ring is then the attach ⁇ ment 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
  • t ⁇ _> reguires 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 portab apparatus, it is subject to much abuse of handling and, therefore, the hook latch must be of a substantial con ⁇ struction, 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 hoo cable, or lifting situation.
  • the latch is designed to provide a smooth, contoured outer face to the hook tip, so as to be anti-fouling.
  • the latch is further designed so that, when it is full opened, it straddles the hook shank, and thereby provides maximum throat opening of the hook. In open and closed positions of the latch, the latch does not project beyond the extremities of the hook and vice-versa. Thus, the latch provides good protection, and cannot be snagged on objects.
  • FIGURE 1 represents a side elevation of the latche hook.
  • FIGURES 1A, IB, 1C, ID, IF, 1G, 1H, and II represe cross-sectional area and contours, at various points ar the eye, the shank, and the tip of the hook.
  • FIGURE 2 indicates a front elevation of the hook.
  • FIGURES 3A, 3B, 3C, and 3C represent various side end views of the hook latch.
  • FIG. 1 a side and front elevation of the latched hook, respectively.
  • the hook is of J-shaped construction, which is con ⁇ ventional in the industry.
  • the upper portion provides a ring 13, which encloses an eye 14 or a vertical shaft 14B (see Figure 4) 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 b 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 pro ⁇ vided 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 1A, IB, 1C, ID, IE, IF, 1G, 1H and II 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.
  • OMPI ⁇ which has a relatively wide throat 48, has a bearing sur face 36, which is broad and of relatively long radius of curvature. The purpose of this is to provide broad-base support for a cable that is hooked over the tip of the hook, and supported on the surface 36.
  • the cross-sectio shown in FIGURE 1A 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 II, 1A and IB.
  • FIGS. 13 Because of the small size and closed perimeter of the ring.13, a reduced cross-section area can be provided, FIGURE IE.
  • FIGURES 3A, 3B, 3C, and 3D there shown a side elevation 3A, a top plan view 3C, an end vi 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 bas 'portion 50 of selected length and width.
  • the channel 64 having the ribs 52 and 54 spaced apart, are 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 spring urges the latch outwardly in the position shown in FIGURE 1, where the channel 62 encloses the stub portion 22 of the tip 20, on three sides, by the base 50 and ribs 58 and 56, respectively.
  • FIGURE 1G a smooth contour from the top ring 13, along the ridge 30, along the surface 60 of the latch and then along the smooth outer contour of the tip 20 is pro ⁇ vided.
  • There is no portion of the hook or latch which, as shown in FIGURES 1 and 2, offer any ledge or step that might snag the hook while in use.
  • 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.
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 true EP0007906A1 (fr) 1980-02-06
EP0007906B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10647551B1 (en) 2018-10-25 2020-05-12 Ulven Forging Incorporated Rope hook assembly having a latch member

Families Citing this family (4)

* 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

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
US4013314A (en) * 1974-03-29 1977-03-22 Archer Jean Francois Lifting hooks
US4039220A (en) * 1976-05-04 1977-08-02 Don R. Hinderliter, Inc. Latch for hoisting hook

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO7900396A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10647551B1 (en) 2018-10-25 2020-05-12 Ulven Forging Incorporated Rope hook assembly having a latch member

Also Published As

Publication number Publication date
WO1979000396A1 (fr) 1979-07-12
DE2857269C1 (de) 1985-01-17
EP0007906B1 (fr) 1982-07-07
GB2036157A (en) 1980-06-25
GB2036157B (en) 1982-08-18

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