WO2024161303A1

WO2024161303A1 - Cartridge connection device

Info

Publication number: WO2024161303A1
Application number: PCT/IB2024/050845
Authority: WO
Inventors: Gianluca Gnutti; Beatrice CO'; Alberto DRERA
Original assignee: Camozzi Automation S.p.A.
Priority date: 2023-01-31
Filing date: 2024-01-30
Publication date: 2024-08-08

Abstract

A connection device (1) for connecting a pipe (2) to a component (3) of a pneumatic or hydraulic circuit comprises a tubular body (10) of the cartridge type externally provided with an annular anchoring element (12). The annular anchoring element (12) is mounted on an end portion (16) of the tubular body (10) which terminates with a cylindrical side wall (122). The annular anchoring element (16) comprises a cylindrical portion (162) placed about said cylindrical side wall (16), anchoring means (124) extending radially from said cylindrical portion.

Description

"Cartridge connection device"

DESCRIPTION

[0001] The present invention relates to a connection device for connecting a pipe to a component of a pneumatic or hydraulic circuit . In particular, the connection device , subj ect matter of the present invention, is o f the cartridge type , i . e . , it has a substantially tubular body suitable for being inserted into a respective seat obtained in the pneumatic or hydraulic circuit component .

[0002] The subj ect matter of the present invention furthermore comprises a method for assembling the connection device in the respective seat and a method for disassembling the connection device from the respective seat .

[0003] In accordance with the preamble of claim 1 , connection devices of this type are already known, comprising a tubular body of the cartridge type that is externally provided with an annular anchoring element suitable for anchoring the tubular body to an inner side wall of the seat wherein the device is to be housed . The tubular body is internally provided with retaining means suitable for retaining a pipe inside the connection device .

[0004] In some known embodiments , the annular anchoring element is mounted on an end portion of the tubular body which, when the connection device is in use , is at least partially inserted into the device seat at the outward opening thereof .

[0005] An example of this type of cartridge connection is described in WO 2011 / 128390 . In the embodiment shown in this publication the annular anchoring element consists of a washer that is arranged within a respective groove obtained on an end portion of the tubular body . To this end, the end portion is elastically deformable between a deformed state , wherein it allows the washer to be inserted into the groove and, during the disassembly step, removed from the respective groove , and a resting state wherein it retains the washer on the tubular body .

[0006] Such connection device allows for ef ficient anchoring of the tubular body in the respective seat but requires , for the assembly thereof and for the disassembly thereof from the seat , an operation for the deformation of the end portion to be performed by using a special tool and a movement of the washer whilst the end portion of the tubular body is in the deformed state .

[0007] The obj ect of the present invention is that of proposing a connection device of the type cited above , but capable of being assembled, inserted in the respective seat , and possibly extracted from the seat in a more rapid and simple manner for the operator .

[0008] Such obj ect is achieved with a connection device according to claim 1 , with an assembly method according to claim 10 and with a disassembly method according to claim 13 .

[0009] The dependent claims describe preferred or advantageous embodiments of the connection device .

[0010] The features and advantages of the connection device according to the invention shall be made apparent from the following description of preferred embodiments thereof , provided by way of non-limiting example, with reference to the accompanying figures , wherein :

[0011] -Figure 1 is an exploded perspective view of the connection device according to the invention;

[0012] - Figures 2 and 2a show, in perspective and axial section views respectively, the assembled connection device , separated from a pneumatic or hydraulic circuit component ;

[0013] - Figure 3 is an elevation view of the connection device ;

[0014] - Figure 3a is an enlarged view of the detail X which is circled in Figure 3 ;

[0015] - Figures 4 and 4a show, in axial section view, two steps of the method for assembling the connection device into a respective seat located in the pneumatic or hydraulic circuit component ;

[0016] - Figure 5 is an axial section of the connection device mounted in the respective seat and ready to receive a pipe to be connected to the component ;

[0017] - Figure 6 is an axial section of the connection device during the step of releasing the pipe ;

[0018] - Figures 7- 10 show various steps of a procedure for disassembling the connection device from the component of a pneumatic or hydraulic circuit ;

[0019] - Figure 11 is a partial section view in separate parts of a kit for disassembling the coupling device from the component of a pneumatic or hydraulic circuit ;

[0020] - Figures 12 and 13 show, in partial axial section, two steps in a procedure for disassembling the connection device from the component of a pneumatic or hydraulic circuit , in an embodiment variant employing the disassembly kit of Figure 11 ;

[0021] - Figure 14 is an elevation view, in partial section, of a component of the connection device , in an embodiment variant that allows for easy disassembly from the component of a pneumatic or hydraulic circuit ; and [0022] - Figures 15 and 16 are two axial section views of two steps o f a procedure for disassembling the connection device from the component of a pneumatic or hydraulic circuit , in a further embodiment variant employing the component in Figure 13 .

[0023] In said drawings , a connection device according to the invention has been indicated in the entirety thereof with the numeral 1 . The connection device is suitable for connecting a pipe 2 to a component 3 of a pneumatic or hydraulic circuit . An outward opening device seat 4 is obtained within such component 3 . The device seat is delimited by an inner side wall 4a, for example a cylindrical wall . At an outer surface 3 ' of the component 3 , the inner side wall 4a delimits an opening 5 wherethrough the connection device 1 is inserted into the device seat 4 .

[0024] The connection device 1 is of the cartridge type , i . e . , it is suitable for being inserted under pressure into the device seat 4 in order to perform the function thereof of connecting the pipe 2 to the component 3 of a pneumatic or hydraulic circuit .

[0025] In a general embodiment , the connection device 1 comprises a tubular body 10 o f the cartridge type externally provided with an annular anchoring element 12 suitable for anchoring the tubular body 10 to an inner side wall 4a of the device seat 4 .

[0026] The tubular body 10 is furthermore internally provided with retaining means 14 suitable for retaining the pipe 2 inside the connection device 1 . [0027] The annular anchoring element 12 is mounted on an end portion 16 of the tubular body 10 which, when the connection device 1 is in use , is at least partially inserted into the device seat 4 at the outward opening 5 thereof .

[0028] In the following description, for simplicity of explanation, "proximal" will also be defined as an element which, when the connection device is in use , is arranged on, or facing, the opening 5 of the device seat 4 , and "distal" an element arranged on or facing the opposite part , i . e . , towards the bottom of the device seat 4 .

[0029] The end portion 16 terminates towards the proximal end of the tubular body 10 , i . e . , on the part that forms the entrance to the end of the pipe 2 , with a cylindrical side wall 162 .

[0030] The annular anchoring element 12 comprises a cylindrical portion 122 that is suitable for being placed about the cylindrical side wall 162 of the end portion 16 . In other words , this cylindrical portion 122 at least partially overlaps the cylindrical side wall 162 .

[0031] From such cylindrical portion 122 there extend radially anchoring means 124 , which, when the end portion 16 and the annular anchoring element 12 are pressed into the device seat 4 , are suitable for anchoring themselves to the inner side wall 4a of the device seat 4 .

[0032] The outer diameter of the cylindrical portion 122 i s therefore less than the inner diameter of the side wall 4a of the device seat 4 ; on the other hand, at rest the anchoring means 124 have a larger outer diameter compared to the inner diameter of the side wall 4a of the device seat 4 . However, such anchoring means 124 may be de formed in such a way that , in exerting axial pressure upon the tubular body 10 and upon the annular anchoring element 12 , the connection device 1 , provided with the anchoring means 124 , may be inserted into the device seat 4 . The anchoring means 124 anchor themselves to the inner side wall 4a of the device seat 4 , so that the connection device may not be accidentally extracted from the device seat 4 .

[0033] Of note is the fact that the annular anchoring element 12 is simply fitted onto the end portion 16 of the tubular body 10 without the need to deform such end portion 16 in any way . In fact , when the annular anchoring element 12 is axially pressed into the device seat 4 , it is the anchoring means 124 that deform by flexing .

[0034] In one embodiment , the cylindrical portion 122 of the annular anchoring element 12 is mounted with clearance , i . e . , without interference , on the cylindrical side wall 162 . In other words , the annular anchoring element 12 is axially slidable in relation to the end portion 16 , in such a way as to facilitate the positioning of the annular anchoring element 12 around the end portion 16 during the step of assembling the connection device 1 .

[0035] In one embodiment , the anchoring means 124 extend from the distal end of the cylindrical portion 122 , i . e . , facing towards the bottom of the device seat 4 . In this way, the anchoring means 124 may be obtained by a simple machining of one end of a cylindrical element , for example made of a metallic material , that forms the annular anchoring element 12 .

[0036] In one embodiment , the cylindrical side wall 162 of the end portion 16 is axially delimited, in a distal direction, by an annular step 164 suitable for axially engaging the annular anchoring element 12 . In this way, during the step o f inserting the connection device 1 into the device seat 4 , the annular anchoring element 12 does not have to be manually retained on the tubular body 10 , but remains axial ly bound thereto in the distal direction by virtue of the annular step 164 .

[0037] In one embodiment , the cylindrical portion 122 of the annular anchoring element 12 has an axial extension that is substantially equal to the axial extension of the cylindrical side wall 162 of the end portion 16 . In this way, during the step of inserting the connection device 1 into the device seat 4 , it is possible to simultaneously act axially both on the end portion 16 of the tubular body 10 and on the annular anchoring element 12 .

[0038] In one embodiment , the connection device 1 comprises a tubular pusher element 18 partially inserted into the tubular body 10 and axially translatable between an inactive retracted position and an active advanced position, wherein it engages the retaining means 14 so as to bring the retaining means 14 to a releasing position of the pipe 2 .

[0039] This tubular pusher element 18 comprises an end or proximal flange 182 that is external to the tubular body 10 and that is suitable for axially engaging both the end portion 16 of the tubular body 10 and the cylindrical portion 122 of the annular anchoring element 12 .

[0040] Such tubular pusher element 18 may therefore also be used, other than for allowing the pipe to be released, for axially pressing the tubular body 10 and simultaneously the annular anchoring element 12 in order to introduce both of the components into the device seat 4 .

[0041] In one embodiment , an annular undercut 166 , facing in the insertion direction of the connection device 1 into the device seat 4 , is obtained in an inner wall of the end portion 16 , for example in proximity to the distal end thereof . The tubular pusher element 18 is provided with a radial annular tooth 184 suitable for being engaged by the annular undercut 166 . In this way, the interaction between the radial annular tooth 184 and the annular undercut 166 prevents the tubular pusher element 18 from accidentally slipping of f the tubular body 10 .

[0042] In one embodiment , the anchoring means 124 comprise at least one crown of anchoring teeth 126 . For example , every anchoring tooth 126 terminates with a cutting edge 126 ' that is suitable for cutting into the inner side wall 4a of the device seat 4 .

[0043] In one embodiment , the anchoring teeth 126 , in a rest state , are inclined towards the proximal end of the tubular body 10 , i . e . , in a direction opposite to that of insertion of the connection device into the device seat 4 . In this way, during the step of inserting the connection device 1 into the device seat 4 , the anchoring teeth flex further toward the cylindrical portion 122 thereby making it possible to introduce them into the gap formed between the tubular body 10 and the inner side wall 4a of the device seat 4 .

[0044] Furthermore , when the connection device 1 is inserted into the device seat 4 , i f upon the connection device there acts a force that is oriented in the opposite direction from the direction of insertion of the connection device 1 into the device seat 4 , the anchoring teeth 126 , which are bent towards the opening 5 of the device seat 4 and provided with a cutting edge 126' , tend to increase the grip on the inner side wall 4a of the device seat 4 .

[0045] In one embodiment shown in the drawings , the cutting edges 126 ' of the anchoring teeth 126 are configured to form a helical profile suitable for allowing the extraction of the annular anchoring element 12 from the device seat 4 by unscrewing it .

[0046] In one embodiment shown in the drawings , the tubular body 10 comprises an intermediate portion 20 having a smaller outer diameter than the maximum diameter of the tubular body 10 , and an annular end portion 22 , i . e . , distal , having a larger outer diameter than the outer diameter of the intermediate portion 20 . An annular sealing element 24 , for example an o-ring, is housed or retained, for example by calibrated interference , within such annular end portion 22 . The latter is connected to the free end of the intermediate portion 22 by means of a yielding connection element 26 , so that , when the tubular body 10 is pressed into the device seat 4 and the annular end portion 22 rests on an annular step 4b obtained in the inner side wall 4a of the device seat 4 , the intermediate portion 20 advances axially with respect to the annular end portion 22 pushing the annular sealing element 24 into a respective seat 4c obtained in the device seat 4 ( Figure 4 , 4a ) . The annular sealing element 24 , pressed into the respective seat 4c, is suitable for being sealingly engaged with the distal end of the pipe inserted into the connection device ( Figure 6 ) .

[0047] As regards the retaining means 14 which are suitable for holding the pipe 2 inside the connection device 1 , in one embodiment shown in the drawings such retaining means 14 are comprised of a metallic washer provided with retaining teeth 142 having a cutting edge and facing radially towards the center of the washer . For example , the retaining teeth 142 are inclined in the direction of the insertion of the pipe into the connection device in such a way that , i f an attempt is made to extract the pipe 2 from the connection device , the interference between the retaining teeth 142 and the outer surface of the pipe 2 increases .

[0048] In this case , in a resting state the tubular pusher element 18 simply comes to rest with the distal end thereof against the retaining teeth 142 ; i f the tubular pusher element 18 is axially pressed in an advanced position, it opens the retaining teeth 142 flexing them radially outwards in such a way as to disengage them from the outer surface of the pipe , which may then be extracted ( Figure 6 ) .

[0049] In one embodiment , the metallic washer 14 is held peripherally by the tubular body 10 in being interposed between the end portion 16 and the intermediate portion 20 , integral therebetween . For example , the end portion 16 and the intermediate portion 20 are connected by means of a shape and/or force coupling, for example a snap connection with light interference .

[0050] The subj ect matter of the invention furthermore comprises a method for assembling the connection device described above in a component of a pneumatic or hydraulic circuit wherein a device seat 4 is obtained .

[0051] As mentioned above , the anchoring means 124 , in an inactive position, have a larger outer diameter than the inner diameter o f the inner side wall 4a of the device seat .

[0052] In a general embodiment , the assembly method provides for partially inserting the connection device 1 into the device seat 4 , in such a way that the anchoring means 124 come to rest against the edge of the opening 5 of the device seat 4 ( Figure 4 ) .

[0053] At this point it is possible to axially press both the end portion 16 and the cylindrical portion 122 of the annular anchoring element 12 in such a way as to cause a deformation of the anchoring means 124 and the interference insertion thereof into the device seat 4 ( Figure 4a ) .

[0054] In the case wherein the connection device 1 is provided with a tubular pusher element 18 , the end portion 16 and the cylindrical portion 122 of the annular anchoring element 12 are axially pressed by means of such tubular pusher element 18 .

[0055] In one embodiment shown in the drawings , the axial pressure on the connection device 1 may be imparted by means of a pushing tool 30 that is suitable for acting upon the flange 182 of the tubular pusher element 18 . For example , such pushing tool 30 has a central concave area 302 that is suitable for engaging the flange 182 of the tubular pusher element 18 and a peripheral portion 304 that surrounds such central concave area 302 and that is suitable for coming to rest against the component 3 of the pneumatic or hydraulic circuit to perform the end-o f- stroke function .

[0056] The subj ect matter of the invention further comprises a method for disassembling the connection device 1 from the component 3 of the pneumatic or hydraulic circuit , in the embodiment wherein the connection device 1 is provided with anchoring teeth 126 , the cutting edges 126 ' thereof extend along a helical profile .

[0057] According to a general embodiment , the disassembly method provides for engaging at least two diametrically opposite anchoring teeth 126 , and subsequently rotating the annular anchoring element 12 in such a way as to extract the annular anchoring element 12 from the device seat 4 by unscrewing it .

[0058] In certain embodiments ( Figures 9- 12 ) , in order to engage the anchoring teeth 126 , a disassembly tool 40 ; 50 may be used that is provided with at least two diametrically opposite unscrewing teeth 402 ; 502 , each being suitable for being introduced into the gap formed between the inner side wall 4a of the device seat 4 and the annular anchoring element 12 and for being inserted between two adj acent anchoring teeth ( Figure 9 , 12 ) . Once the unscrewing teeth 402 ; 502 have radially engaged with the anchoring teeth 126 it is possible to rotate the disassembly tool in order to unscrew the annular anchoring element 12 ( Figure 10 ) .

[0059] In an embodiment illustrated in Figures 11- 13 , a disassembly kit 45 comprising a disassembly tool 50 and a guide bush 52 is used for the operation of disassembling the connection device 1 ( Figure 11 ) . [0060] The guide bush 52 has an annular shape and is suitable for coming to rest on the outer surface 3 ' of the component 3 .

[0061] The guide bush 52 has an axial hole 54 delimited by an internal threaded surface 56 .

[0062] In the disassembly tool 50 , the unscrewing teeth 502 extend from a cyl indrical end portion 504 having an outer threaded surface 506 . The cylindrical end portion 504 is suitable for being screwed into the axial hole 54 of the guide bush 52 . When such cylindrical end portion 504 is fully screwed into the axial hole 54 , the unscrewing teeth 502 protrude , fully or nearly fully, beyond the guide bush 52 .

[0063] To carry out the disassembly of the connection device 1 from the component 3 , the cylindrical end portion 504 is screwed into the guide bush 52 ( Figure 12 ) .

[0064] At this point , the assembled disassembly kit 45 is placed on the component 3 , so that the unscrewing teeth 502 are introduced into the annular gap formed between the inner side wall 4a of the device seat 4 and the annular anchoring element 12 until they are inserted between the anchoring teeth 126 ( Figure 13 ) . After the unscrewing teeth 502 have radially engaged the anchoring teeth 126 , the disassembly tool 50 may be rotatably operated, keeping the guide bush 52 stationary, to unscrew the annular anchoring element 12 .

[0065] The rotation of the disassembly tool 50 thus also causes it to unscrew from the guide bush 52 .

[0066] By virtue of the disassembly kit 45 , and in particular the coupling between the disassembly tool 50 and the guide bush 52 , both the axial insertion of the unscrewing teeth 502 into the connection device and the unscrewing operation are controlled and guided, thus avoiding the risk of excessive pressure of the disassembly tool onto the connection device .

[0067] Figure 14 shows an embodiment variant of the end portion 16 of the body 10 of the connection device 1 , wherein an annular groove 164 ' is obtained in the s ide of the annular step 164 facing the proximal end of the connection device 1 .

[0068] Figures 15 and 16 depict two steps in a method for disassembling the connection device 1 from the component 3 in an embodiment variant that employs a connection device 1 provided with the end portion 16 with the annular step 164 and the annular groove 164 ' .

[0069] In this case , a disassembly tool 60 provided with a cylindrical deformation collar 62 may be used for the disassembly of the connection device 1 .

[0070] This cylindrical deformation collar 62 is suitable for being inserted into the annular gap formed between the inner side wall 4a of the device seat 4 and the annular anchoring element 12 and terminates with an edge 62' suitable for exerting an axial pressure on the base of the anchoring teeth 126, i.e., on their proximal portion connecting to the cylindrical portion 122.

[0071] For the disassembly of the connection device 1, the disassembly tool 60 is then pressed axially so that the cylindrical deformation collar 62, being inserted into the annular gap formed between the inner side wall 4a of the device seat 4 and the annular anchoring element 12, presses the base of the anchoring teeth 126 into the annular groove 164' of the end portion 16, causing the anchoring teeth 126 to flex, i.e., the respective cutting edges 126' to approach the cylindrical portion 122.

[0072] Due to this flexing, the anchoring teeth 126, and in particular the respective cutting edges 126' thereof, disengage from the inner side wall 4a of the device seat 4, thus allowing easy extraction of the connection device 1, for example by means of a tool or the pipe itself.

[0073] In one embodiment wherein the connection device 1 is provided with the tubular pusher element 18, in order to engage the anchoring teeth 126 it may be necessary to remove, for example by using a normal screwdriver, the tubular pusher element 18 (Figures 7 and 8) . [0074] To the embodiments of the connection device and the assembly and disassembly methods according to the invention, a person skilled in the art , in order to meet contingent needs , may make modi fications , adaptations , and substitutions of elements with others that are functionally equivalent , without departing from the scope of the following claims . Each of the features described as belonging to a possible embodiment may be obtained independently of the other described embodiments .

Claims

1. Connection device (1) for connecting a pipe (2) to a component (3) of a pneumatic or hydraulic circuit, where, in said component, a device seat (4) opening outwards is obtained, comprising a tubular body (10) of the cartridge type externally provided with an annular anchoring element (12) suitable for anchoring the tubular body (10) to an inner side wall (4a) of the device seat (4) , and internally provided with retaining means (14) suitable for retaining the pipe (2) inside the connection device (1) , where the annular anchoring element (12) is mounted on an end portion (16) of the tubular body (10) which, when the connection device is in use, is at least partially inserted into the device seat (4) at the outward opening thereof, the connection device being characterized in that:

- the end portion (16) terminates with a cylindrical side wall (162) ; the annular anchoring element (12) comprises a cylindrical portion (122) placed about said cylindrical side wall (162) , anchoring means (124) radially extending from said cylindrical portion, suitable for being anchored to the inner side wall (4a) of the device seat (4) when the end portion (16) and the annular anchoring element (12) are pressed into the device seat (4) .

2. Connection device according to claim 1, wherein said cylindrical portion (122) is mounted with clearance onto the cylindrical side wall (162) .

3. Connection device according to claim 1 or 2, wherein the anchoring means (124) extend from the end of the cylindrical portion (122) facing the insertion direction of the connection device into the device seat (4) .

4. Connection device according to any one of the preceding claims, wherein the cylindrical side wall (162) is axially delimited by an annular step (164) suitable for axially engaging the annular anchoring element (12) in the insertion direction of the connection device into the device seat (4) .

5. Connection device according to claim 4, wherein the cylindrical portion (122) of the annular anchoring element has an axial extension substantially equal to the axial extension of the cylindrical side wall (162) of the end portion (16) .

6. Device according to any one of the preceding claims, comprising a tubular pusher element (18) partially inserted into the tubular body (10) and axially translatable between an inactive retracted position and an active advanced position, wherein it engages the retaining means (14) so as to bring the retaining means to a pipe releasing position, wherein said tubular pusher element (18) comprises an end flange (182) outside the tubular body (10) and suitable for axially engaging both the end portion (16) of the tubular body (10) and the cylindrical portion (122) of the annular anchoring element ( 12 ) .

7. Connection device according to the preceding claim, wherein an annular undercut (166) facing in the insertion direction of the connection device into the device seat is obtained in an inner wall of the end portion (16) , and wherein the tubular pusher element (18) is provided with a radial annular tooth (184) suitable for being engaged by the annular undercut (166) so as to prevent the tubular pusher element from slipping off the tubular body .

8. Device according to any one of the preceding claims, wherein the anchoring means (124) comprise at least one crown of anchoring teeth (126) .

9. Device according to claim 8, wherein the anchoring teeth (126) have cutting edges ( 126 ’ ) configured to form a helical profile suitable for allowing an extraction of the annular anchoring element (12) from the device seat (4) by unscrewing it.

10. Connection device according to any one of the preceding claims, wherein the tubular body (10) comprises an intermediate portion (20) having a smaller outer diameter than the maximum diameter of the tubular body, and an annular end portion (22) having a larger outer diameter than the outer diameter of the intermediate portion (20) , wherein an annular sealing element (24) is housed in the annular end portion (22) , and wherein the annular end portion (22) is connected to the free end of the intermediate portion (20) by means of a yielding connection element (26) , so that, when the tubular body (10) is pressed into the device seat (4) and the annular end portion (22) rests on an annular step (4c) obtained in the inner side wall of the device seat, the intermediate portion (20) advances axially with respect to the annular end portion (22) , pushing the annular sealing element (24) into a respective seat obtained in the device seat (4) .

11. Assembly method for a connection device (1) according to any one of the preceding claims in a device seat (4) obtained in a component (3) of a pneumatic or hydraulic circuit, where said device seat is delimited by an inner side wall (4a) and is open outwards, and where the anchoring means (12) , in an inactive position, have a larger outer diameter than the inner diameter of the inner side wall of the device seat, comprising the steps of : partially inserting the connection device into the device seat, so that the anchoring means (12) rest against the edge of the opening of the device seat; axially pressing both the end portion (16) and the cylindrical portion (122) of the annular anchoring element (12) so as to cause a deformation of the anchoring means and an insertion thereof with interference into the device seat.

12. Assembly method according to the preceding claim, wherein the connection device is made according to claim 6, and wherein the end portion (16) and the cylindrical portion (122) of the annular anchoring element (12) are axially pressed by means of the tubular pusher element (18) .

13. Disassembly method of a connection device according to any one of claims 9 or 10 from a device seat obtained in a component of a pneumatic or hydraulic circuit, where said device seat is delimited by an inner side wall and is open outwards, comprising the steps of: a) engaging at least two diametrically opposite anchoring teeth (126) ; b) rotating the annular anchoring element (12) so as to extract the annular anchoring element from the device seat by unscrewing it.

14. Disassembly method according to the preceding claim, wherein step a) is carried out by means of a disassembly tool (40; 50) provided with at least two diametrically opposite teeth (402; 502) , each suitable for being introduced into the annular gap formed between the inner side wall (4a) of the device seat (4) and the annular anchoring element (12) and for being inserted between two adjacent anchoring teeth (126) .

15. Disassembly method according to claim 14, wherein step a) comprises the sub-steps of: al) providing a disassembly kit (45) comprising a disassembly tool (50) and a guide bush (52) , wherein the guide bush (52) has a threaded axial hole (54) , and wherein the unscrewing teeth (502) extend from a cylindrical end portion (504) suitable for being screwed into the threaded axial hole (54) so that the unscrewing teeth (502) protrude at least partially beyond the guide bush ( 52 ) ; a2) screwing the cylindrical end portion (504) into the guide bush (52) ; a3) placing the guide bush (52) on the component (3) so that the unscrewing teeth (502) are introduced into the annular gap formed between the inner side wall (4a) of the device seat (4) and the annular anchoring element (12) , until they are inserted between the anchoring teeth (126) , and wherein in step b) the rotation of the annular anchoring element (12) is carried out by rotating the disassembly tool (45) and keeping the guide bush (52) stationary .

16. Disassembly method of a connection device according to any one of claims 4-10 from a device seat formed in a component of a pneumatic or hydraulic circuit, where said device seat is delimited by an inner side wall and is open outwards, and where in the side of the annular step (164) facing the proximal end of the connection device (1) an annular groove (164' ) is formed, comprising the steps of: providing a disassembly tool (60) equipped with a cylindrical deformation collar (62) suitable for being inserted into the annular gap formed between the inner side wall (4a) of the device seat (4) and the annular anchoring element (12) and terminating with an edge (62' ) suitable for exerting an axial pressure on the base of the anchoring teeth (126) ;

- pressing the disassembly tool (60) axially so that the cylindrical deformation collar (62) presses the base of the anchoring teeth (126) into the annular groove (164' ) of the end portion (16) , causing the anchoring teeth (126) to flex and thus disengage from the inner side wall

(4a) of the device seat (4) .