High strength hook, in particular for elastic cable
AssigneeJoubert S.A.
InventorsXAVIER JOUBERT, THIERRY JOUBERT
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Abstract
The invention relates to a high strength hook. The hook comprises an annular metal insert (3) embedded in a synthetic material end block of the hook around a passage (4) for slidably receiving the end of a cable (5) in the vicinity of a stop abutment (4c) designed to stop the end of the cable in the traction direction. The invention is applicable to hooks comprising a metal hook having an end embedded in a handle block.
Claims11
1/ A hook of the type comprising an end block (B) of synthetic material shaped to make the hook easier to hold in the hand and having a passage (4) passing therethrough for slidably receiving the end of a cable (5) to which the hook is to be fixed, said passage having a taper which defines an abutment (4c) for stopping the end of the cable, which is enlarged after it has passed through the passage, whenever traction is exerted on the cable tending to extract it from the passage, the hook being characterized in that an annular metal insert (3) is embedded in the block around said passage in the vicinity of said stop abutment (4c).
2/ A hook according to claim 1, including metal reinforcement constituted by a rigid wire (A) having one end (1) curved into an upside-down J-shape (FIG. 1) and having its other end bent so as to be situated in a plane perpendicular to the plane of the J-shape and curved into a ring so as to constitute said insert (3).
3/ A hook according to claim 2, in which said annular insert (3) has an axis passing through the top (S) of the curve of the J-shape.
4/ A hook according to claim 2 or 3, in which the reinforcement wire (A) is a flat.
5/ A hook according to any one of claims 1 to 4, in which said passage (4) forms an inlet duct (4a) through which the non-enlarged end of the cable (5) is inserted into the hook, and an outlet duct (4b) larger than the inlet duct, and suitable for receiving the enlarged end of the cable and opening out so as to face the curve of the J-shape, said passage forming a shoulder (4c) at the junction between the two ducts, thereby constituting said abutment.
6/ A hook according to claim 5, in which the inlet edge of the inlet duct (4a) is rounded so as to avoid leaving any sharp edge which could injure the cable.
7/ A hook according to claim 5 or 6, in which the annular insert (3) surrounds said inlet duct (4a) in the vicinity of its junction (4c) with the outlet duct (4b).
8/ A hook according to any one of claims 1 to 7, in which the block has lateral recesses (a-d) and projections (e, f).
9/ A hook according to any one of claims 1 to 8, in which the block presents a tilting safety tongue (7) fixed to said block and suitable for bearing against the free end (E) of the hook on the inside of the hook.
10/ A hook according to any one of claims 1 to 9, in which the free end (E) is coated with extra injected material.
11/ A hook according to any one of claims 1 to 10, fixed to a cable (5) inserted in said passage and whose end that passes through said passage is folded back onto itself and crimped by means of a clip, said passage being shaped so as to receive the folded-back and crimped end of the cable when the cable is subjected to traction tending to extract it from the passage, until the folded-back and crimped end comes into abutment against the abutment formed in said passage.