Anchor

Abstract

Anchor (20) for a coupling (1) for connection to a traction member (30); the coupling (1) having a cylindrical shank (10) extending along a longitudinal axis (12) and comprises a first fork (140) having a first seat (1400) delimited by a bottom surface (141) transverse to the longitudinal axis (12) and provided with a first abutment member (1404); the anchor (20) comprising a shank (200) longitudinally delimited by a first end (202) extending according to a given direction (D1) and by a second end (204) provided with a fluke (2040); the first end (202) being shaped to engage the first fork (140) and provided with a transverse hole (2022) to couple indirectly with a pin (1402) carried by the first fork (140) to identify a given pivot axis (1402A); the first end (202) having a second abutment member (2024) arranged to interact with the first abutment member (1404) in order to limit a rotation motion of the first end (202) around the transverse axis (1402A) with respect to the first fork (140).

Description

[0001] ANCHOR

[0002] DESCRIPTION

[0003] The present invention relates to an interface for connecting an anchor to a traction member . In particular, the present invention re fers to an interface for connecting an anchor to a traction member with a swivel coupling . More in detail , the present invention refers to an interface for connecting an anchor to a traction member with a swivel coupling comprising an end of the anchor and a shank of the swivel coupling .

[0004] DESCRIPTION OF THE BACKGROUND ART

[0005] The need to anchor a boat in roadstead or to increase the stability of a quayside mooring are known to require the use of at least one anchor, and anchors shaped di f ferently based on the type of seabed in which the boat is to be anchored have been designed, considering the flukes and the shank that ends with a first end provided with an eyelet to couple with a traction member, generally a chain . The increasing use of devices that operate members provided to interact with the outside environment without requiring human intervention has made it necessary to rethink the shape of these members , above all when the relative mode of use di f fers from that traditionally adopted by human operators .

[0006] Among these devices a special mention goes to the anchor windlass , a device that is installed at the bow on boats to facilitate the steps of dropping and hoisting the anchors in combination with a guide associated with the bow roller for the relative chain . The guide has the function of orienting the chain at the winch of the anchor windlass so as to prevent j amming of the chain and mal functioning of the hoist , and the bow roller has the purpose of retaining the anchor during navigation or when the boat is moored at the quayside . Generally, the chain is connected to the eyelet of the end of the shank through a shackle and the bow roller carries an idler wheel externally, the function of which is to limit friction during hoisting of the chain . When an anchor is hoisted, a critical moment can occur i f the end of the shank of the anchor transversely engages the race of the wheel , sticking, causing a condition of dimensional interference between this end and the race of the wheel . When this occurs , human intervention is required to overcome the condition of sticking . On the other hand, to overcome this problem, particularly irksome when wishing to hoist the anchor quickly, for example due to a sudden change in the weather conditions while at anchor in a crowded bay, according to the patent TR 2007 06837 by the Turkish company "Boyut Makina Sanayi Ve Ticaret" , chain and anchor are interfaced through a swivel coupling . According to the teachings of the patent , the coupling comprises a cylindrical shank to which a pin is coupled in a ball j ointed manner in an end position; this pin has a free end provided with a first fork that houses the end link of the chain . The shank, externally cyl indrical , has a diameter that approximates by default the dimensions of the race of the wheel and on one side has a seat for the ball head of the pin . On the other side , the shank of the swivel coupling has a second fork that , passed through transversely by a pivot pin, engages the eyelet of the anchor to allow stable connection and relative rotation of the anchor with respect to the shank . Moreover, on this side , and on the same side as the bill , the shank of the swivel coupling has a saddle member carried inferiorly by the shank that protrudes longitudinally beyond its end portion to externally surround on three sides the end of the shank provided with the eyelet . This saddle member provides a support condition to the shank of the anchor, when the shank of the anchor is al igned with the shank of the swivel coupling, circumstance in which the rotation of the shank in the race of the wheel is facilitated with respect to the first fork, and produces correct angular positioning of the anchor with the end of the shank oriented so as to correctly engage ( from a dimensional viewpoint ) the race of the wheel . The purpose of this solution is to facilitate hoisting of the anchor until complete reeling in of the chain and relative stabili zation of the anchor in the bow roller .

[0007] It is easily understood that the assembly of the first end of the anchor and of the saddle member that equips the shank of the swivel coupling defines an interface which, in addition to connecting the anchor to the traction member, facilitates correct orientation of the anchor with respect to the wheel of the bow roller .

[0008] However, implementation of the interface as described above produces some drawbacks . On the one hand, the saddle member belongs to the shank but structurally represents its weakest part , lengthens its longitudinal extension increasing the possibility that , as a whole , the shank may be damaged during the operations to hoist the anchor or stow it in the relevant peak together with the relevant traction member, compromising its use . It must also be mentioned that production of the saddle member requires a previously punched sheet metal element to be bent and welded to the free end of the fork to connect the respective prongs , greatly extending the production process that led to production of the shank, carried out by chip removal machining . To avoid these drawbacks it is necessary to take action on the interface modi fying the structure of the shank and of the anchor, in particular on the respective first end .

[0009] For the reasons described above , the problem of obtaining an anchor which is shaped to be coupled with a sturdy shank, which has a limited longitudinal extension and which can be produced at low cost to be integrated in a connection interface between the anchor and the relevant traction member where the function of the interface is to facilitate the operations to hoist said anchor without requiring human intervention is currently unsolved, and represents an interesting challenge for the applicant , capable of changing the competitive scenario .

[0010] In consideration of the situation described above , it would be desirable to have a connection interface between an anchor and a traction member which, besides limiting and possibly overcoming the drawbacks typical of the state of the art illustrated above , sets a new standard for these types of product .

[0011] SUMMARY OF THE PRESENT INVENTION

[0012] The present invention relates to an interface for connecting an anchor to a traction member . In particular, the present invention re fers to an interface for connecting an anchor to a traction member with a swivel coupling . More in detail , the present invention refers to an interface for connecting an anchor to a traction member with a swivel coupling comprising an end of the anchor and a shank of the swivel coupling .

[0013] The aforesaid drawbacks are solved by the present invention according to at least one of the appended claims .

[0014] According to some embodiments of the present invention, there is provided an anchor for a coupling for connection to a traction member ; said coupling having a cylindrical shank extending along a longitudinal axis and comprises a first fork having a first seat delimited by a bottom surface transverse to said longitudinal axis and provided with a first abutment member ; said anchor comprising a shank longitudinally delimited by a first end extending according to a given direction and by a second end provided with a fluke ; said first end being shaped to engage said first fork and provided with a transverse hole to couple indirectly with a pin carried by said first fork to identi fy a given pivot axis ; said first end having a second abutment member arranged to interact with said first abutment member in order to limit a rotation motion of said first end around said transverse axis with respect to said first fork .

[0015] According to an embodiment as described above , said second abutment member comprises a tooth eccentric with respect to said hole and said first abutment member is contained inside said first seat ; said tooth and said second abutment member being shaped to interact in abutment when, in use , said first end i s aligned, or inclined by an angle of a given amplitude , with respect to said longitudinal axis . According to an embodiment as described above , said tooth is substantially V-shaped or stepped to have a first rectangular shaped flat face on the side of said abutment member ; said first abutment member extending from said bottom surface towards said pin and having a respective second rectangular shaped flat face on the side of said tooth; said first face and second face being arranged to be tangent when, in use , said first end is aligned with said longitudinal axis .

[0016] According to an embodiment as described above , said first abutment member comprises a first longitudinal boss arranged laterally on the edge o f said bottom surface or in intermediate position on the edge of said bottom surface .

[0017] According to some embodiments of the present invention a connection interface is provided between an anchor and a traction member ; said anchor comprising a shank axially delimited by a first end and by a second end provided with a fluke ; said first end extending longitudinally and provided with a connection hole extending according to an axis transverse to said shank; said interface comprising a coupling provided with a shank having a respective first fork delimiting a seat arranged to house said first end and delimited by a bottom surface transverse to said longitudinal axis ; said shank extending according to a longitudinal axis and comprising a pin carried by said first fork transversely to said longitudinal axis and arranged to engage said hole to make said shank freely rotatable with respect to said first fork; said interface further comprising said first end; said interface comprising a limiting device of the relative rotation of said shank with respect to said shank contained inside said seat .According to an embodiment as described above , said limiting device comprises a tooth machined in said first end eccentrically with respect to said transverse axis and an abutment member carried by said first fork in a position such as to determine , in use , a condition of contact with said tooth when said first end is aligned, or inclined, with respect to said shank, by a given angle .

[0018] According to an embodiment as described above , said abutment member is delimited transversely by a respective edge and internally by a flat abutment face ; said tooth being delimited on the side of said abutment member by a first abutment surface having a first apical part and a second part both positioned on the same side ; said edge being suitable to act as abutment for said second part of said first abutment surface .

[0019] According to an embodiment as described above , said tooth is substantially V-shaped and delimited by a first abutment surface ; said first abutment member being delimited by a second abutment surface shaped so as to be tangent to said first surface when, in use , said first end is aligned with said shank in an area of contact o f given geometric shape . According to an embodiment as described above , said shank carries a second fork opposite said first fork; said second fork being spherically j ointed with respect to said shank and arranged to couple with said traction member .

[0020] Any further embodiments of the present invention are defined by the claims .

[0021] BRIEF DESCRIPTION OF THE FIGURES

[0022] Further features and advantages of the anchor and of the interface according to the present invention will be more apparent from the following description, provided with reference to the accompanying figures , which illustrate at least one example of non-limiting embodiment thereof , in which for practical reasons identical or corresponding parts of anchor and interface are identi fied by the same reference numbers . In particular :

[0023] Fig . 1 is a schematic perspective view of a first preferred embodiment of an anchor and of an interface for connecting an anchor to a traction member according to the present invention;

[0024] - Fig . 2 is an enlarged view with parts removed for clarity of Fig . 1 ;

[0025] - Fig . 3 is an enlarged view of a detail of Fig . 2 ;

[0026] - Fig . 4 is a longitudinal sectional view of Fig . 3 ;

[0027] - Fig . 5 is an enlarged view of a detail taken from Fig . 4 ; - Figs . 6 and 7 are two enlarged views of a detail taken from Fig . 4 and rotated through 180 ° with respect to one another ;

[0028] - Fig . 8 is a sectional view of a second embodiment of Fig . 4 ;

[0029] - Fig . 9 is a sectional view of a third embodiment of Fig . 4 ; and

[0030] - Figs . 10a and 10b represent said Fig . 4 in two distinct operating positions .

[0031] DETAILED DESCRIPTION OF THE PRESENT INVENTION

[0032] Before describing in detail the preferred embodiments of the present invention, or details thereof , it is useful to speci fy that the relevant scope of protection is not limited to the particular embodiments described hereunder . The disclosure and the description in the present document are illustrative and explicative of one or more currently preferred embodiments and variants , and it will be apparent to those skilled in the art that various changes may be made to the design, organi zation, operating order, operating means , structures of the equipment and position, to the methodology and use of mechanical equivalents without departing from the spirit of the invention .

[0033] Moreover, it must be understood that the accompanying figures have the obj ect of clearly illustrating and disclosing currently preferred embodiments to a person skilled in the art , but are not drawings illustrating how these embodiments should be executed in reality or true representations of final products ; on the contrary, these figures may comprise conceptual views simpli fied to facilitate understanding or to allow a simpler and quicker explanation to be provided . Moreover, the dimensions and the relative arrangement of the components may di f fer from those shown and still operate within the spirit of the invention .

[0034] Further, it will be understood that various directions , such as "upper" , " lower" , " left" , " right" , " front" , "back" and so forth, are executed only with respect to the explanation in combination with the drawings and that the components can be oriented di f ferently, for example during transport and production, as well as during operation . As many di f ferent and distinct embodiments may be implemented within the scope of the concepts taught herein, and as there are many modi fications that may be made to the embodiments described herein, it must be understood that the details provided hereunder are to be interpreted as illustrative and non-limiting of the spirit of the invention .

[0035] In Fig . 1 , the re ference number 20 indicates , as a whole , an anchor 20 for a coupling 1 for connection to a traction member 30 . The coupling 1 has a cylindrical shank 10 extending along a longitudinal axis 12 and comprises a first longitudinal portion 14 provided with a first fork

[0036] 140 having a first seat 1400 delimited by a bottom surface

[0037] 141 ( Figs . 4 and 7 ) arranged transversely to the longitudinal axis 12 . Moreover, the first fork 140 is provided with a first abutment member 1404 detected by the bottom surface 141 and contained inside the first seat 1400 inside the ideal cylindrical surface that externally delimits the shank 10 for the whole of the respective longitudinal extension . The first abutment member 1404 is longitudinally delimited by a transverse section 1406 .

[0038] The anchor 20 comprises a shank 200 extending according to a broken line and is longitudinally delimited by a first end 202 , in turn extending according to a rectilinear direction DI , and by a second end 204 , which is provided with a fluke 2040 and extends according to a rectilinear direction inclined with respect to the direction DI . The first end 202 is delimited by two opposite paral lel flat faces to engage the first fork 140 by si ze and with clearance . The first end 202 is further provided with a transverse hole 2022 , the function of which is to couple with a pin 1402 . This pin is carried to a central position by the first fork 140 , where a pivot axis 1402A transverse to the longitudinal axis 12 coincides with the pin 1402 . The first end 202 of the shank 200 has peripherally a second abutment member 2024 arranged to interact with the first abutment member 1404 so as to define an angular limit to a rotational motion of the first end 202 with respect to the transverse axis 1402A.

[0039] The first abutment member 1404 is contained inside the first seat 1400 and together with the second abutment member 2024 are shaped to interact in abutment when, in use , the traction member 30 carries the shank 10 to engage the race of the wheel of the bow roller (members that are known and for this reason not il lustrated) and the first end 202 is inclined with respect to the shank 10 by a given angle , according to the design speci fications , or is aligned with the longitudinal axis 12 , as shown in Figs . 1 , 2 , 3 , in which the given angle assumes the value of 0 ° . When this alignment occurs , the shank 10 and the first end 202 of the anchor 20 (hence the anchor 20 itsel f ) are in a condition of metastable equilibrium that , in use , is easily overcome due to even the slightest oscillations of the craft carrying the bow roller during hoisting of the anchor 20 , with the result that the anchor 20 causes rotation of the shank 10 when this approaches the wheel of the bow roller and is arranged at an angle with respect to said shank 10 rotating with respect to the first fork 140 , a condition in which the first end 202 is located in an ideal position to engage the race of the wheel of the bow roller and the anchor 20 can be pulled by the traction member 30 regularly until assuming the respective locked position on the bow roller .

[0040] In particular, the second abutment member 2024 comprises a tooth that for practicality is indicated with the same reference number 2024 , where this tooth 2024 is eccentric with respect to the hole 2022 and is substantially V-shaped as shown in Figs . 4 and 5 . This tooth 2024 has a first flat abutment face 20240 parallel to the axis of the hole 2022 ( Fig . 5 ) , which has a first apical part 20240 ' and a second part 20240 ' ' that descends towards the second part 204 of the anchor 20 ; it is speci f ied that both the first part 20240 ' and the second part 20240 ' ' are positioned on the same side with respect to the fluke 2040 . The first part 20240 ' is substantially rectangular shaped and positioned so as to face the first abutment member 1404 , according to a rotation motion of the tooth 2024 and the first abutment member 1404 towards one another, hence according to a rotation of the shank 200 of the anchor 20 through an angle of less than 180 ° with respect to a position in which the shank 10 and the shank 200 are aligned .

[0041] With particular reference to Figs . 5 and 7 , the first abutment member 1404 extends from the bottom surface 141 towards the pin 1402 and has a respective second rectangular shaped flat face 1408 on the side of the tooth 2024 arranged to act as angular abutment for the first face 20240 . It may be useful to speci fy that the first face 20240 and the second face 1408 are arranged to be tangent , hence , to abut so as to fit together, when in use the first end 202 is aligned with the longitudinal axis 12 . Moreover, with particular reference to Figs . 5 , 10a and 10b, the abutment member 1404 can consist of a strip of the shank 10 , which for practicality is indicated with the same reference number 1404 ; this abutment member 1404 laterally closes the seat 1400 and is delimited transversely by a respective edge 1406 and internally by a flat abutment face 1408 . Therefore , the abutment member 1404 , and in particular the respective edge 1406 , is suitable to act as abutment for the second part 20240 ' ' of the first abutment surface 20240 . With regard to the description above , the assembly of the first end 202 and of the shank 10 , in particular of the tooth 2024 and of the abutment member 1404 , through the first part 20240 ' and second part 20240 ' ' of the first abutment surface 20240 on one side , and the face 1408 and the strip 1406 on the other, define a limiting device 2000 of the relative clockwise and counter-clockwise rotation of the anchor 20 with respect to the shank 10 of the coupling 1 around the pin 1402 . Therefore , the function of the limiting device 2000 is to be arranged to delimit an admissible angular operating range for the relative rotation of the shank 200 of the anchor 20 with respect to the first fork 140 of the shank 10 of the coupling 1 inside the respective seat 1400 around the transverse axis 1402A of the pivot pin 1402 . This angular range is defined by two limit positions , in both of which the tooth 2024 contacts the abutment member 1404 and the dimensions of this angular range are a function of the shape of the tooth 2024 and of the edge 1406 of the strip 1404 and of the respective positions on the first end 202 and with respect to the seat 1400 .

[0042] With regard to the description above , the coupling 1 and the first fork 140 simultaneously define a connection interface 1000 between the anchor 20 and the traction member 30 that comprises a limiting device 2000 of the rotation of the shank 200 with respect to the shank 10 contained inside the seat 1400 of the first fork 140 . The limiting device 2000 comprises the first abutment member 1404 and the tooth 2024 so that , together, the function of the interface 1000 is to limit the rotation of the first end 202 with respect to the transverse axis 1402A inside the first seat 1400 , and define a condition of metastable alignment between the shank 10 and the shank 200 when the respective first end 202 is aligned with the shank 10 , hence with the longitudinal axis 12 . This condition occurs when the limiting device 2000 is arranged with the first surface 20240 and the second surface 1408 in contact so as to fit together, as shown in Fig . 4 , hence in a condition of metastable equilibrium, as it can be easily modi fied by the triggering of an axial rotation of the shank 10 in the race of the wheel of the bow roller, fixed or swivelling, determined by a minimum imbalance of the anchor 20 . The contact between the first face 20240 and the second face 1408 is extended to minimi ze the contact pressure that , in use , is frequently impulsive , hence very taxing for the resistance of the materials used to fabricate the anchor 20 and the shank 10 .

[0043] Naturally, the shank 10 , which is part of the interface 1000 , has a second portion 16 incorporating a ball j oint , a pin 164 of which carries a second fork 168 to which the traction member 30 is connected .

[0044] Use of the anchor 20 and of the connection interface 1000 between the anchor 20 and the traction member 30 is easily understood from the description above and does not require further explanation .

[0045] Finally, it is clear that modi fications and variations can be made to the anchor 20 and to the interface 1000 described and illustrated herein, without departing from the scope of protection of the present invention .

[0046] Moreover, it is useful to speci fy that the condition of alignment between the first end 202 and the longitudinal axis 12 can be determined at any radial distance from the longitudinal axis 12 on a plane oriented in any manner with respect to the longitudinal axis 12 and to the transverse axis 1402A, provided that the shank 10 and the first end 202 are structured in such a way that this condition can occur . In particular, Fig . 8 shows the structural condition in which this radial distance is zero and the tooth 2024 and the first abutment member 1404 are modi fied respectively in the tooth 2024 ' and in the first abutment member 1404 ' to determine a respective condition of contact in a position coincident with the longitudinal axis 12 , as shown in Fig . 8 , or next to the axis . In particular, in this figure , the embodiment of the tooth 2024 ' is stepped, hence parallelepiped, and the corresponding first surface 20240 ' of this tooth 2024 ' and the second surface 1408 ' of the first abutment member 1404 ' fit together on a plane M identi fied by the longitudinal axis 12 and by the transverse axis 1402A, hence median for the shank 10 .

[0047] The condition of parallelism between the longitudinal axis 12 and the first abutment plane 1404 is overcome with reference to Fig . 9 , where the plane M is inclined with respect to the longitudinal axis 12 by an angle definable at will to maximi ze the extent of the contact area between the first face 20240 and the second face 1408 .

[0048] Based on the description above , it is easily understood that the problem having an anchor that is sturdy and can be manufactured at low cost , and shaped to be incorporated in an interface the function of which is to establish a condition of metastable equilibrium in which the first end 202 of the shank of the anchor is aligned with the shank of a swivel coupling during hoisting of the anchor carried out by a traction member operated by an anchor windlass device when the shank approaches the race of the wheel of the bow roller . The obj ect of the above is to facilitate triggering of the rotation of the shank in the race of the wheel of the bow roller during hoisting, with the result that the anchor is subsequently arranged at an angle with respect to the shank, orienting it in ideal position for the shank of the anchor to engage the race of the wheel of the bow roller until the anchor is taken to the locking position, fully respecting the structural features of the wheel of the bow roller, without requiring human intervention is actually solved .

[0049] In the claims , any reference sign placed between parentheses shall not be construed as limiting the claim . The word " comprising" does not exclude the presence of other elements or steps besides those listed in a claim . Moreover, the term " a" or " an" , as used in this context , is defined as one or more than one . Moreover, the use of introductory expressions such as " at least one" and "one or more" in the claims shall not be construed to imply that the introduction of another claim element identi fied using the indefinite article "a" or " an" limits any particular claim in which this claim element appears singularly, even when thi s claim comprises the introductory phrases "one or more" or " at least one" and the indefinite article " a" or " an" . This same applies to the use of the definite article . Unless otherwise stated, terms such as " first" and " second" are used to arbitrarily distinguish between the elements these terms describe . Therefore , these terms are not necessarily intended to indicate temporal or other prioritization of these elements. The mere fact that certain measures are recited in mutually different claims does not indicate that a combination of these measures cannot be used to advantage.

Claims

CLAIMS1. Anchor (20) for a coupling (1) for connection to a traction member (30) ; said coupling (1) having a cylindrical shank (10) extending along a longitudinal axis (12) and comprises a first fork (140) having a first seat (1400) delimited by a bottom surface (141) transverse to said longitudinal axis (12) and provided with a first abutment member (1404) ; said anchor (20) comprising a shank (200) longitudinally delimited by a first end (202) extending according to a given direction (DI) and by a second end (204) provided with a fluke (2040) ; said first end (202) being shaped to engage said first fork (140) and provided with a transverse hole (2022) to couple indirectly with a pin (1402) carried by said first fork (140) to identify a given pivot axis (1402A) ; characterized in that said first end (202) has a second abutment member (2024) arranged to interact with said first abutment member (1404) in order to limit a rotational motion of said first end (202) around said transverse axis (1402A) with respect to said first fork (140) .

2. The anchor according to claim 1, characterized in that said second abutment member (2024) comprises a tooth (2024) eccentric with respect to said hole (2022) and in that said first abutment member (1404) is contained inside said first seat (1400) ; said tooth (2024) and said second abutment member (2024) being shaped to interact in abutment when, in use, said first end (202) is aligned, or inclined by an angle of a given amplitude, with respect to said longitudinal axis (12) .

3. The anchor according to claim 2, characterized in that said tooth (2024) is substantially V-shaped or stepped to have a first rectangular shaped flat face (20240) on the side of said abutment member (1404) ; said first abutmentmember (1404) extending from said bottom surface (141) towards said pin (1402) and having a respective second rectangular shaped flat face (1408) on the side of said tooth; said first face (20240) and second face (1408) being arranged to be tangent when, in use, said first end (202) is aligned with said longitudinal axis (12) .

4. Anchor according to claim 3, characterized in that said first abutment member (1404) comprises a first longitudinal boss (1404) arranged laterally on the edge of said bottom surface (141) or in intermediate position on the edge of said bottom surface (141) .

5. Connection interface (1000) between an anchor (20) and a traction member (30) ; said anchor (20) comprising a shank (200) axially delimited by a first end (202) and by a second end (204) provided with a fluke (2040) ; said first end (202) extending longitudinally and provided with a connection hole (2022) extending according to an axis (1402A) transverse to said shank (200) ; said interface (1000) comprising a coupling (1) provided with a shank (10) having a respective first fork (140) delimiting a seat (1400) arranged to house said first end (202) and delimited by a bottom surface (141) transverse to said longitudinal axis (12) ; said shank (10) extending according to a longitudinal axis (12) and comprising a pin (1402) carried by said first fork (140) transversely to said longitudinal axis (12) and arranged to engage said hole (2020) to make said shank (200) freely rotatable with respect to said first fork (140) (and couple it with said traction member) ; said interface (1000) further comprising said first end (202) ; characterized by comprising limiting means (2000) of the relative rotation of said shank (200) with respect to said shank (10) contained inside said seat (1400) .

6. The interface according to claim 5, characterized in that said limiting means (2000) comprise a tooth (2024) machined in said first end (202) eccentrically with respect to said transverse axis (1402A) and an abutment member (1404) carried by said first fork (140) in a position such as to determine, in use, a condition of contact with said tooth (2024) when said first end (202) is aligned, or inclined with respect to said shank (10) , by a given angle.

7. The interface according to claim 6, characterized in that said abutment member (1404) is delimited transversely by a respective edge (1406) and internally by a flat abutment face (1408) ; said tooth (2024) being delimited on the side of said abutment member (1404) by a first abutment surface (20240) having a first apical part (20240' ) and a second part (20240' ' ) both positioned on the same side; said edge (1406) being suitable to act as abutment for said second part (20240' ' ) of said first abutment surface (20240) .

8. The interface according to claim 6 or 7, characterized in that said tooth (2024) is substantially V-shaped and delimited by a first abutment surface (20240) ; said first abutment member (1404) being delimited by a second abutment surface (1408) shaped so as to be tangent to said first surface (20240) when, in use, said first end (202) is aligned with said shank (10) .

9. The interface according to claim 8, characterized in that said shank (10) carries a second fork (168) opposite said first fork (140) ; said second fork (168) being spherically jointed with respect to said shank (10) and arranged to couple with said traction member (30) .

Images