EP3181506A1 - Lifting ring with tangential locking - Google Patents

Abstract

Ring (1) for the lifting of loads, remarkable in that it comprises a body (2) orientable consisting of a handle (21) for receiving a lifting element, and a base (22) traversed from in part by a chamber for receiving an anchoring element. The base of the ring further includes at least one mounting bore (24) for receiving a locking member. The anchoring element (3), whose side surface has at least one texturing and whose distal end consists of a fixing rod, is adapted to secure said ring to the load. The locking member has a connector portion adapted to engage at least texturing of the anchor member to temporarily prohibit rotation of the handle around the anchor member.

Description

Technical area

The present invention relates to a rotating or steerable lifting ring, intended to be anchored in a load to lift it.

Prior art

In the field of heavy load handling, lifting methods can be classified into two distinct families, depending on the application of the lifting force. Thus, one can act by lifting the load from below, for example by means of a pallet truck, or choose to tow it by acting from above or the sides, for example by means of slings provided with hooks or shackles to their lower end, which engage with at least one lifting ring.

Thus, in order to lift a load, it is most often necessary to provide it with gripping points. These most often take the appearance of screw rings, fixed or mobile.

Such lifting rings have been known for a long time. They consist of a loop, in which the lifting hook can be introduced, and a thread allowing their attachment to the load.

Fixed rings are inexpensive, but have major drawbacks, among which the impossibility of being biased in flexion. Indeed, the force must always be in the plane of the ring. Therefore, it is forbidden to fix them on the side walls of the load to be lifted. This problem has been solved by the development of orientable and / or articulated rings.

Such rings are described in particular in the documents EP1034130 B1 and EP0462963 B1 .

Nevertheless, such rings can be difficult to put in place, since their mobile handle can hinder the operator when screwing the thread in the load. Moreover, the use of a suitable key is often required, and the elements that project into the internal space of the handle can interact negatively with the attachment element (hook, shackle, sling ...) at the risk of loosening and / or damaging shocks.

Finally, these rings consist of multiple parts, sometimes complex, which increases the risk of premature wear and mechanical failures.

Thus, the present invention aims to provide a lifting ring whose design is simpler, and proposing a temporary locking system of the rotation of the handle relative to the anchoring element, for better efficiency and maneuverability.

Presentation of the invention

The present invention aims to overcome the disadvantages described above by proposing a "compact" ring. It consists of a reduced number of parts (at least one body, an anchoring element and a locking element), these being protected against impacts and undesirable clashes by their shape or their disposition to very heart of the ring.

The innovation is based on the possibility offered to the user to choose the method that seems most appropriate for fixing the ring to the load (by hand via the body of the ring, by hand via the anchoring element or with a key via the anchoring element) and secondly that this anchoring element can, during assembly, evolve freely in rotation in the base of the anchor. ring, be secured to the base of the ring through said locking member.

Thus, the present invention relates to a ring for the load lifting comprising on the one hand a steerable body comprising a loop forming two arms associated with a base whose plane lower surface serves as a reference plane P1, said base being traversed right through by a chamber disposed between said arms and defining an inner surface of revolution oriented along an axis A perpendicular to the plane P1, and on the other hand an anchoring element oriented along the axis A and housed in said chamber rotatably, and a locking element.

Subsequently, the term "upper space (respectively lower) than the plane P1" means the space above (respectively below) the plane P1 towards the ring (towards the load).

The handle allows the passage of a lifting element adapted to the specific lifting conditions of the load, such as a hook, a sling or a shackle.

The ring is orientable, that is to say that at least a portion of said ring is able to freely rotate around the direction axis A, during the lifting of a load. The "steerable" feature allows the ring to align favorably in the plane of the pulling force to which it is subjected.

Said ring is remarkable in that it further comprises at least one mounting bore, arranged tangentially to said chamber and oriented along an axis B belonging to a plane P2 tangent to the inner surface of revolution, connecting on the one hand at least an opening disposed on said inner surface and, on the other hand, at least one opening disposed on the lateral surface of said base, and in that the anchoring element has at least one texturing on its lateral surface, and in that locking member is adapted to be inserted longitudinally at least in part into the mounting bore and has at least one connecting portion, at least a portion of said locking element being movable between a passive position in which said connecting portion is entirely contained in said mounting bore (ie in the volume defined by said bore) and an active position in which said connecting portion cooperates with at least one texturing of said element anchoring at said opening of said inner surface to temporarily prohibit rotation of the base around the anchor.

In the active position, the connecting portion is no longer entirely contained in said mounting bore, and protrudes into the volume constituting said chamber, through said opening of said inner surface. In addition, regardless of the variant adopted for the anchoring element, it comprises at least texturing on its lateral surface.

Texturing is understood to mean any extrusion, removal of material, or combination of both, intended to create a particular pattern on the surface, such as serrations or flats, and with which a particular interaction may occur.

Brief description of the drawings

• the figure 1 is a perspective view of the body of the ring,
• the Figures 2a to 2d are perspective views of the anchoring element, the base and the locking element,
• the figure 3 is a perspective view of the ring being assembled.

Preferred way of carrying out the invention

The present invention relates to a lifting ring, for the safe lifting of the load, by its capacity orientation in the plane of the tensile force that it undergoes.

The figures described hereinafter show by way of a preferred example, although not limiting, a ring 1, comprising inter alia a body 2, an anchoring element 3 and a locking element 4.

So the figure 1 is a perspective view of the body 2 of the ring 1, composed of a loop 21 and a base 22 whose flat bottom surface 222 serves as reference plane P1. In this variant, the handle 21 and the base 22 constitute a single one-piece assembly, the handle 21 being on the figure 1 artificially demarcated from the base 22 for better understanding and represented in a gray manner.

The term "flat bottom surface", the lower surface of the base 22 in the case where a lower countersink 234 exists, as is the case here in this particularly preferred embodiment of the ring 1.

The base 22 is traversed right through by a generally cylindrical chamber 23 whose dimensions of the upper opening are substantially equal to the spacing existing between the arms of said handle 21. The chamber 23 is oriented along an axis A perpendicular to the plane P1 and directed to the space above the plane P1.

The chamber defines an inner surface of revolution 231 and is provided with two upper counters 232 and lower 234 defining two bearing surfaces 233, 235 and a joining surface 236.

Furthermore, the base comprises a mounting bore 24 disposed tangentially to the chamber 23 and oriented along an axis B belonging to a plane P2 (not shown) tangential to the inner surface of revolution 231. In this variant, P2 is perpendicular to P1 and the axis B is parallel to the plane P1 (ie orthogonal to the axis A).

The mounting bore 24 connects an opening 241 disposed on the inner surface 231 (shown shaded) and an opening 242 disposed on the lateral surface 221 of the base 22. It also comprises a counterbore 243, at the opening 242 opening on the side surface 221, provided with two notches 244 .

The base 22 further comprises a locking bore 25 oriented along an axis C perpendicular to the axis B, and perpendicular to P1 in this variant, open on the one hand on the mounting bore 24 and on the other hand on the outer surface of said base 22, which in this case corresponds to the lower bearing surface 235.

The figure 2 a is a perspective view of the anchoring element 3, consisting of a proximal portion 31, an intermediate portion 32, and a distal portion 33 in the form of a threaded fastening rod. The proximal portion 31 comprises two cylindrical sections 311, 312 arranged to create a first shoulder 313 adapted to bear on the upper bearing surface 233 of the upper counter of the chamber 23 and a second shoulder 321 adapted to bear on the joining surface 236 of the two countersinks 232, 234 of the chamber 23.

The first section 311 of the proximal portion 31 has a texturing on its lateral surface in the form of serrations giving a knurled appearance facilitating the grip and manual screwing of the anchor element in the load.

The second section 312 of the proximal portion 31 has a texturing 310 on its lateral surface in the form of a ring of flats able to cooperate with the locking element 4 in order to temporarily secure the base 22 to the anchoring element 3 .

Finally, the anchoring element 3 comprises on its upper surface 30 a housing 34 intended to receive an actuating key of the hexagonal type for fastening the element anchor 3 to the load.

The figure 2 b is a perspective view of the locking element 4, which comprises, in its preferred variant, an asymmetrical connective portion 41 in the form of a rod comprising a recess of oblong shaped material, a perimetrical groove 42 allowing the fastening of the locking element 4 at the base 22 via a locking means 5, a knurled end 43, and a bore 44 for inserting an engagement means 7. In this preferred embodiment of the element locking 4, it is fully mobile. It passes, just like the connecting portion 41, from the passive position to the active position (and vice versa) by rotation around the axis B.

The figure 2 d is a perspective view of the base 6, whose lower surface 64 is adapted to bear on the load to be lifted, and whose lower upper surface 62 is adapted to bear, in the variant chosen, on the bearing surface of the lower counterbore 235 of the chamber 23 while the upper upper surface 63 is able to bear against the lower shoulder 313 of the second section 312 of the anchoring element 3.

The figure 3 is a perspective view of the ring 1 during assembly. When mounting the ring 1, the anchoring element 3 is inserted at the chamber 23 of the body 2 and is thus oriented along the axis A.

The locking means 5 in the form of a pin is then inserted and is held in the locking bore 25 between the base 6 and the mounting bore 24, to engage with the locking element 4 at the level of the perimeter groove 42. The locking element 4 is inserted into the mounting bore 24 and receives the engagement means 7 in the form of a double-spring pusher.

Variants of the invention

Hereinafter, we detail various features and variants, not shown as such, of the various elements of said lifting ring 1.

Firstly, according to the invention, the loop 21 and the base 22 preferably constitute one and the same monobloc assembly (homogeneous), but can also be assembled (solidary, heterogeneous), or articulated relative to one another. 'other.

In the first two cases, where the base 22 and the loop 21 are integral, they are preferably arranged so as to be both in the plane P1 or so that the handle is disposed in a plane perpendicular to the plane P1 and even more preferably in a plane perpendicular to the plane P1 and containing the axis A.

In the case where the handle 21 is articulated relative to the base 22, it can pivot about the axis A and / or about an axis at least orthogonal to the axis A.

For its part, said chamber 23 is preferably substantially cylindrical, that is to say that it forms a single cylinder or a succession of concentric cylindrical sections and of different diameters. Nevertheless, any other form, for example using milling, may be considered.

This chamber 23 endows said base 22 with an inner surface 231 preferably of complementary shape to at least a portion of the anchoring element 3. The latter makes it possible to secure the body 2 of the ring 1 to the load to be moved.

Thus, the anchoring element 3 advantageously comprises at least on the one hand a proximal portion 31, disposed at least partly in said chamber 23 and oriented along the axis A towards the space greater than the plane P1, and of on the other hand a distal portion 33 in the form of a fixing rod adapted to secure the ring 1 to the load and extending outwardly from the base 22 to the space below the plane P1.

Advantageously, the displacement of said anchoring element 3 relative to said chamber 23 is substantially zero. Throughout the text, the term "substantially lower" is used when the dimension of a part or part portion is adjusted to the dimensions of the bore that receives it (almost zero clearance).

The at least one texturing 310 present on the lateral surface of the anchoring element 3 is advantageously arranged at the level of the proximal portion 31 of the latter. Preferably, the anchoring element 3 comprises two texturations 310 surface, distinct from each other, by their type and / or their location.

According to a first variant of the anchoring element 3, the latter comprises an intermediate portion 32 disposed at least partly in the chamber 23 when the ring 1 is attached to the load and connecting said proximal portion 31 to said distal portion 33. This intermediate portion 32 may have a section of any shape, and preferably a circular section when its clearance relative to the chamber 23 is almost zero.

In addition, the ring 1 may be provided with a base 6, having a central bore 61, such as preferably a shoulder washer. This base 6 can be crimped to the base 22 and / or said anchoring element 3. Preferably, said base 6 is crimped to the anchoring element 3 at its intermediate portion 32 when it exists.

Furthermore, said base 22 advantageously comprises a locking bore 25 which, when it exists, is intended to receive a locking means 5 able to secure the base 22 to the locking element 4.

The blocking bore 25 is oriented along an axis C at less orthogonal to the axis B, open on the one hand on the mounting bore 24 and on the other hand on the outer surface of said base 22. By external surface means the lateral surface 221 or the lower surface 222 of said base 22, or the lower bearing surface 235 of the counterbore 234 when it exists.

By this arrangement and this mode of operation, the locking element 4 is protected from any detrimental shock or hooking since it is encompassed, at least at its connecting portion 41, by the ring 1 itself, after having inserted into bore 24 provided for this purpose. Furthermore, the mounting bore 24 receives a locking element 4 preferably elongate.

In the variants of the invention comprising said locking bore 25, the locking element 4 has a perimetrical groove 42 disposed in a plane perpendicular to the axis B, so that it can be detachably secured to said base 22 by intermediate of a locking means 5, such as a pin, housed in said locking bore 25 and engaging with said perimeter groove 42. The locking member 4 may also have such a groove 42 in them. other variants of the invention, but its interest is then limited.

The base 22 of the ring 1 can also be declined according to several variants.

Thus, according to a first variant of said base 22, the diameter of the upper opening of the chamber 23 is much smaller than the gap existing between the arms 211, 2 12 constituted by the loop 21, so that said base 22 presents an upper surface on which the anchoring element 3 can bear. In this variant, it will be advantageous to associate an anchoring element 3 having a collar at its proximal end 31, the dimensions of which are greater than the dimensions of the opening. upper chamber 23, and at most substantially less than the spacing between the arms 211,212 constituted by the loop 21.

According to a second variant of said base 22, the diameter of the upper opening of the chamber 23 is substantially smaller than the gap existing between the arms 211, 22 formed by the loop 21. This characteristic appears in the preferred variant presented on the figures 1 and 3 .

A first sub-variant of the first and second variants of the base 22 consists in providing the chamber 23 with an upper counterbore 232 defining an upper recess of diameter D1 open towards the space greater than the plane P1, an internal recess of smaller diameter D2 at D1 and an upper bearing surface 233 disposed inside said chamber 23 and oriented towards the space greater than the plane P1.

A second sub-variant of the first and second variants consists in providing said chamber 23 with a lower counterbore 234, defining a lower recess of diameter D3 open in the opposite direction to the handle, an internal recess of diameter D4 less than D3 and a lower bearing surface 235 disposed inside said chamber 23 and oriented towards the space below the plane P1.

It is also possible to combine the two subvariants previously described, in order to provide both the chamber 23 with an upper counterbore 232 and a lower counterbore 234, the diameter of the upper opening of the chamber 23 being substantially less or significantly less than the distance between the arms 211,212 constituted by the loop 21 according to whether it is desired to provide or not the base 22 of an upper bearing surface.

Of course, when said chamber 23 has both an upper counterbore 232 and a lower counterbore 234, these are concentric.

• lorsque les diamètres D2 et D4 sont égaux, les évidements internes des lamages supérieurs 232 et inférieur 234 forment un unique évidement interne,
• lorsque le diamètre D2 est supérieur au diamètre D4, le lamage inférieur 234 est raccordé au lamage supérieur 232 par une surface de jonction 236, préférentiellement horizontale, orientée vers l'espace supérieur au plan P1.

At least two configurations are possible:

• when the diameters D2 and D4 are equal, the internal recesses of the upper counterbores 232 and 234 below form a single internal recess,
• when the diameter D2 is greater than the diameter D4, the lower counterbore 234 is connected to the upper counterbore 232 by a junction surface 236, preferably horizontal, oriented towards the space greater than the plane P1.

From the configuration chosen for the base 22 of the ring 1, it is then possible to determine the most satisfactory characteristics for the anchoring element 3.

According to yet another variant of the anchoring element 3, hereinafter called "adjusted variant", the proximal end 31 advantageously has a first section 311 of diameter substantially smaller than D1, radially projecting relative to the remainder of said proximal portion. 31 whose diameter is at most equal to D2. In this configuration, the lower shoulder 314 of this first section 311 is able to bear on the upper bearing surface 233 of the upper counterbore 232 of said chamber 23.

In the variants of the invention comprising a base 6, it is preferably housed at least in part in the lower counterbore 234 of the chamber 23 when it exists. Nevertheless, it can also be disposed entirely outside the base 22, for example to act as a soleplate for the latter.

Whatever the configuration of the base 6, it is sandwiched during assembly of the ring 1 between the base 22 and the load, so that on the one hand its lower surface 64 bears on the while on the other hand, at least one upper face 62,63 of said base 6 is in contact at least partially with said base 22 of the ring. Advantageously, the lower surface 64 of the base 6 is flat.

In a first sub-variant of the "adjusted variant" of the anchoring element 3, the proximal portion 31 of the latter has a second section 312 of diameter substantially smaller than D2, disposed between said first section 311 and said intermediate portion 32. radially projecting relative to said intermediate portion 32, and whose lower shoulder 313 is adapted to bear on the upper surface 62, 63 of the base 6.

In a second variant of the "adjusted variant" of the anchoring element 3, the proximal portion 31 of the latter has a second section 312 of diameter substantially smaller than D2, disposed between said first section 311 and said intermediate portion 32. radially projecting relative to said intermediate portion 32, and whose lower shoulder 313 is able to simultaneously bear on said junction surface 236 of the upper counters 232 and 234 lower and on the upper surface 62,63 of the base 6 .

Advantageously, the first section 311 of said proximal portion 31 has a texturing 310 on its lateral surface, in the form of serrations giving it a knurled appearance.

When the proximal portion 31 of the anchoring element 3 is composed of a first 311 and a second 312 section, at least one of the texturing (s) 310 is disposed on the lateral surface of said second section 312 and consists of at least one flat and preferably in a crown of flats.

Any combination of the variants described in this description of the anchoring element 3 is of course conceivable, as long as it remains compatible with the body 2 and thus the base 22 of the chosen ring 1.

Advantageously, said anchoring element 3 is able to receive an operating key, at a housing 34 or a protrusion provided for this purpose on its upper surface 30, for performing the fixing of the ring 1 to said load. This characteristic is applicable to all variants of said anchoring element 3.

In order to facilitate the actuation of the locking element 4 from its passive position to its active position (and vice versa), it is advantageously provided with a wheel 43 at at least one of its ends, projecting from said at least one opening 242 disposed on the lateral surface 221 of the base 22. Variations, having at least one non-knurled free end, projecting from said at least one opening 242, and intended to allow the actuation, either of the The entirety of the locking element 4 is only its connecting portion 41, from the passive position to the active position (and vice versa), are also conceivable.

According to a variant of the mounting bore 24, it has at least one notch 244, and even more preferably two notches 244 disposed directly on the edge of the at least one opening 242 opening on the lateral surface 221. of said base 22.

According to a preferred variant of the mounting bore 24, it has a countersink 243 at the level of the at least one opening 242 disposed on the lateral surface 221 of the base 22.

According to a sub-variant of this preferred embodiment, the mounting bore 24 has at least one notch 244, and even more preferably two notches 244 disposed at the level of the larger diameter portion of the counterbore 243.

In general, when the bore 24 comprises two notches 244, these are preferably diametrically opposed.

On the other hand, in the variants, with or without counterbore 243, where the mounting bore 24 has notches 244, the locking element 4 may be provided with a retractable engagement means 7 adapted to move from an extended position in which it cooperates with said notches 244 to allow the temporary holding of the locking element 4 in each of its passive and active positions, at a retracted position during the transient movement of the locking means 4 from the active position to the passive position, and vice versa.

Said engagement means 7 may be integral, integral or removable relative to the locking member 4. It may for example be flexible fins, or pushers.

Preferably, said engagement means 7 is a double spring ball pusher, housed or force-fitted into a bore 44 radially crossing the locking element 4.

Advantageously, said fixing rod 33 for securing the ring 1 to the load is a threaded rod.

Also, according to a particularly preferred variant, said mounting bore 24 is oriented along an axis B orthogonal to the axis A.

• une rainure périmétrique 42, permettant la solidarisation de l'élément de verrouillage 4 à la base 22 par l'intermédiaire d'un moyen de blocage 5, (et/ou)
• une molette 43 à au moins l'une de ses extrémités libres, (et/ou)
• un alésage 44 (selon toute variante adéquate décrite précédemment) permettant l'insertion d'un moyen d'enclenchement 7 (selon toute variante adéquate décrite précédemment), dans les variantes avec ou sans lamage 243 où l'alésage de montage 24 possède des encoches 244.

Moreover, a variant of said locking element 4 is represented on the Figure 2c and consists of a pusher, having at least two concentric portions and at least one free end 45 projecting from said at least one opening 242 disposed on the lateral surface 221 of the base 22. Said pusher can be actuated by at least one its ends, and preferably via said free end 45. In this embodiment, the inner portion 46 of smaller diameter serves as a guide to the outer portion of larger diameter. The latter is movable between the passive position and the active position (and vice versa) by translation along the axis B, and constitutes the connecting portion 41 of said locking element 4. understands that this variant can also be embellished according to the needs of at least one characteristic selected from the following list:

• a perimetrical groove 42, allowing the locking element 4 to be secured to the base 22 by means of a locking means 5, (and / or)
• a wheel 43 at least one of its free ends, (and / or)
• a bore 44 (according to any suitable variant described above) allowing the insertion of an engagement means 7 (according to any suitable variant described above), in the variants with or without counterbore 243 where the mounting bore 24 has notches 244.

Finally, one skilled in the art is able to implement any variant of the locking element 4 functionally adapted to his needs. An overall translation of said locking element 4 along the axis B resulting from a helical movement by the implementation of a worm type system is for example possible.

Possibility of industrial application

The lifting ring according to the invention will find a particularly preferred application in difficult access access zones, but also when the risk of fouling, the risk of shock or the risk of snagging are significant.

Finally, it goes without saying that the present invention is not limited to the embodiments described. It can be modified or adapted according to the needs or special requirements, without departing from the scope of the invention.

Claims (17)

Ring (1) for lifting loads comprising on the one hand a steerable body (2) comprising a handle (21) forming two arms (211, 212) associated with a base (22) whose lower plane surface (222) serves reference plane P1, said base (22) being traversed through a chamber (23), disposed between said arms (211, 212) and defining an inner surface of revolution (231), said chamber (23) being oriented along an axis A perpendicular to the plane P1, and on the other hand an anchoring element (3) oriented along the axis A and housed in the chamber (23) rotatably, and a locking element (4), characterized in that it further comprises at least one mounting bore (24) disposed tangentially to said chamber (23) and oriented along an axis B belonging to a plane P2 tangent to the inner surface of revolution (231), connecting on the one hand at least one opening (241) disposed on said inner surface (231) and on the other hand a e opening (242) disposed on the lateral surface (221) of said base (22), and in that the anchoring element (3) has at least one texturing (310) on its lateral surface, and in that the locking element (4) is adapted to be inserted longitudinally at least in part into the mounting bore (24) and has at least one connecting portion (41), at least a part of said locking element (4) being movable between a passive position in which said connector portion (41) is fully contained in said mounting bore (24) and an operative position in which said connector portion cooperates with at least one texturing (310) of said anchor member (3) at said opening (241) of said inner surface (231) to temporarily prohibit rotation of the base (22) around the anchor member (3). Ring (1) according to claim 1, characterized in that said anchoring element (3) comprises at least one proximal portion (31) disposed at least partly in the chamber (23) and oriented along the axis A towards the space greater than the plane P1 and a fixing rod, such as a threaded rod, constituting its distal portion (33) extending along the axis A to the space below the plane P1 and able to secure said ring (1) to the charge. Ring (1) according to the preceding claim, characterized in that on the one hand said anchoring element (3) comprises an intermediate portion (32) connecting said proximal portion (31) to said distal portion (33) and that on the other hand the ring (1) comprises a base (6), such as preferably a shoulder washer, having a central bore (61) in which said anchoring element (3) is crimped at said intermediate portion (32). Ring (1) according to any one of the preceding claims, characterized in that said base (22) comprises a locking bore (25) oriented along an axis C at least orthogonal to the axis B, open on the one hand on the mounting bore (24) and secondly on the outer surface of said base (22), and in that the locking element (4) has a perimeter groove (42) disposed in a plane perpendicular to the B-axis, the locking means (4) being removably attachable to said base (22) by means of a locking means (5) housed in said locking bore (25) and engaging with said perimeter groove (42). Ring (1) according to any one of claims 2 to 4, characterized in that said chamber (23) has an upper counterbore (232) defining a an upper recess of diameter D1 open towards the space greater than the plane P1, an internal recess of diameter D2 less than D1 and an upper bearing surface (233) oriented towards the space greater than the plane P1, and in that the portion proximal (31) of said anchoring element (3) has a first section (311) of diameter substantially smaller than D1, radially projecting relative to the remainder of said proximal portion (31) whose diameter is at most equal to D2, and the lower shoulder (314) is adapted to bear on said upper bearing surface (233) of said upper counterbeam (232). Ring (1) according to the preceding claim, characterized in that said first section (311) of said proximal portion (31) has a texturing (310) on its lateral surface in the form of serrations giving a knurled appearance. Ring (1) according to any one of the preceding claims, characterized in that said chamber (23) has a lower countersink (234) defining a lower recess of diameter D3 open towards the space below the plane P1, an internal recess of diameter D4 less than D3 and a lower bearing surface (235) oriented towards the space below the plane P1. Ring (1) according to any one of claims 5 or 6 associated with claim 7, characterized in that the internal recesses of the upper (232) and lower (234) counterbores form a single internal recess, the diameters D2 and D4 being equal. Ring (1) according to any one of claims 5 or 6 associated with claim 7, characterized in that the lower counterbeam (234) is connected said upper counterbeam (232) has a junction surface (236) oriented towards the space greater than the plane P1, the diameter D2 being greater than the diameter D4. Ring (1) according to any one of claims 7 to 9, characterized in that said base (6) is housed at least partly in said lower counterbeam (234) of said chamber (23). Ring (1) according to any one of claims 5 to 10, characterized in that the proximal portion (31) of said anchor member (3) has a second section (312) of substantially less than diameter D2, disposed between said first section (311) and said intermediate portion (32), radially projecting relative to said intermediate portion (32), and whose lower shoulder (313) is adapted to bear on the upper surface of the base (6) . Ring (1) according to any one of claims 5 to 10, characterized in that the proximal portion (31) of said anchoring element (3) has a second section (312) of diameter substantially smaller than D2, disposed between said first section (311) and said intermediate portion (32), radially projecting relative to said intermediate portion (32), and whose lower shoulder (313) is adapted to simultaneously bear against said jointing surface (236) of counterbores upper (232) and lower (234) and on the upper surface of the base (6). Ring (1) according to any one of claims 11 or 12, characterized in that said second section (312) of said proximal portion (31) has a texturing (310) on its lateral surface consisting of less a flat. Ring (1) according to any one of the preceding claims, characterized in that said anchoring element (3) is adapted to receive an actuating key, at a housing (34) or a protuberance arranged on its upper surface (30), for fixing the ring (1) to said load. Ring (1) according to any one of the preceding claims, characterized in that said locking element (4) has at least one knurled end (43) projecting from said at least one opening (242) disposed on the lateral surface (221) of said base (22), and permitting rotational operation about the B-axis, said locking member (4) and its connecting portion (41), from said passive position to said active position and vice versa . Ring (1) according to any one of claims 1 to 14, characterized in that said connecting portion (41) of said locking element (4) can be actuated and is able to move from said passive position to said active position and vice versa by translation along the axis B, preferably such a locking element (4) is formed as a pusher. Ring (1) according to any one of the preceding claims, characterized in that said mounting bore (24) has a countersink (243) at said opening (242) disposed on the lateral surface (221) of said base ( 22), said counterbore (243) having at its larger diameter portion at least one notch (244), and in that said locking member (4) is provided with a retractable engagement means (7), such as a double-spring pusher housed in a bore (44) radially traversing said locking member (4), adapted to move from an extended position in which it cooperates with said notch (244), to allow temporary holding of said locking member (4) in each of its passive and active positions, at a retracted position when said locking means (4) moves from the active position to the passive position and vice versa.

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