End piece for applying a product to a screw

Abstract

The invention relates to a tip piece (1') for applying a product onto a screw, the tip piece (1') comprising a proximal end (11) configured to be fastened to a device for dispensing the product and an opposite distal end (12), the tip piece (1') having a longitudinal axis (X-X'). The tip piece is characterized in that it comprises: at least one chamber (2) for dispensing the product, the dispensing chamber having the form of a cavity, the cavity being open at the distal end (12) of the tip piece, and the chamber being configured to receive a shank of a screw, a first chamber (3) for introducing the product, the first chamber being open at the proximal end (11) of the tip piece, and a plurality of channels (4') for dispensing the product, the plurality of channels connecting the first introduction chamber (3) to the dispensing chamber (2), each dispensing channel (4') opening into the dispensing chamber (2) via at least one dispensing orifice (41'), and the dispensing orifices (41') being disposed at the periphery of the dispensing chamber (2).

Description

Technical Field

[0001] This invention relates to an end piece for applying products, particularly grease, to screws. The invention is particularly suitable for the application of mineral graphite grease. Background Technology

[0002] As is known, a screw includes a shank with threads extending from the tip of the shank at least a portion of the height of the shank, and the shank has a screw head. Before assembling two parts using a screw, a product, particularly grease, is typically applied to the screw threads, and even to the bottom surface of the screw head (i.e., the portion closest to the shank), to allow for good force transmission to the screw, especially when clamped with a torque wrench.

[0003] In the prior art, it is known to apply the grease using a brush. However, this technique does not provide control over the amount of grease applied or its distribution on the screw, and it cannot be reproduced from one screw to another.

[0004] To apply grease to screws, syringes are also known to be used, but it is difficult to control the amount of product dispensed.

[0005] However, the amount of product (grease) applied to the screw affects the final clamping torque. Given the new requirements for clamping torque, the ability to control grease application is crucial. Summary of the Invention

[0006] Therefore, the object of the present invention is to provide an end piece for applying a product, which is used for dispensing the product and allows for the repeated application and dispensing of the product on a screw.

[0007] More specifically, the end piece must allow the product to be applied to the screw threads and optionally also to the bottom surface of the screw head.

[0008] Therefore, the present invention relates to an end piece for applying a product to a screw, the end piece including a proximal end and an opposing distal end, the proximal end being configured to be fastened to a device for dispensing the product, the end piece having a longitudinal axis.

[0009] In this invention, the end member includes: at least one chamber for dispensing a product, the chamber being in the form of a cavity that opens at a distal end of the end member via an opening, and the dispensing chamber being configured to receive a shank of a screw; a first chamber for introducing the product, the first chamber opening at a proximal end of the end member; and a plurality of channels for dispensing the product, the plurality of channels connecting the first introduction chamber to the dispensing chamber, each dispensing channel opening into the dispensing chamber via at least one dispensing orifice, and the dispensing orifices being disposed at the periphery of the dispensing chamber.

[0010] Utilizing these features of the present invention, particularly the presence of distribution channels that allow for uniform product distribution, product application can be performed from one screw to another in a controlled, uniform, and reproducible manner.

[0011] In addition, this end piece limits the complexity of screw lubrication operations for the operator responsible for the task.

[0012] Other advantageous, non-limiting features of the invention, used alone or in combination: - The cross-sectional area of ​​the dispensing orifice of the dispensing channel is between -20% and 20% of the area of ​​a circle with radius r, where r = (υ.ρ.L.(Q / N).K)^1 / 4, the radius r is in meters, and υ is the kinematic viscosity of the product to be applied, in m³. 2 / s, ρ is the density of the product to be applied, in kg / m³. 3 L is the length of the distribution channel in meters, and Q is the desired flow rate of the product to be applied, measured at the opening of the distribution chamber, in meters per second. 3 / s, N is the number of distribution channels of the end piece, and the constant K=5.620E-11, the kinematic viscosity and density of the product to be applied are measured at temperatures between 10°C and 40°C; - The dispensing orifices are regularly distributed around the circumference of the dispensing chamber; - The end piece includes means for measuring the amount of product applied, such as a series of scales formed on the outer surface of the end piece facing the product dispensing chamber; - The channel for dispensing products has a spiral shape that coils around the longitudinal axis of the end piece; -The channel for distributing products extends axially; - The cavity of the dispensing chamber is cylindrical, and the cavity includes at least one guide region, the diameter of which is smaller than the diameter of the rest of the cavity; - The distal end of the end piece includes a planar rear surface, and the end piece includes: a second chamber for introducing a product, the second chamber opening at a proximal end of the end piece; and a plurality of channels for dispensing the product, each dispensing channel opening at one end of its end to the second introduction chamber and at its other end to the planar rear surface of the distal end of the end piece via a dispensing orifice. - The second chamber for introducing the product is annular and is arranged around and coaxial with the first chamber for introducing the product; - The end piece includes: an excess product collection chamber, and at least one collection channel connecting one of the product dispensing channels to the excess product collection chamber; - The excess product collection chamber is annular and arranged around the end piece; - The excess product collection chamber is removably mounted on the end piece; - The end piece is provided with a stop to seal the product dispensing chamber, and the stop and the distal end of the end piece are provided with a mating connection device, such as an external thread and an internal thread; - The proximal end of the end piece is provided with means for fastening to a product dispensing device, such as internal or external threads; - A portion of the end piece is formed of a more flexible material than the rest of the end piece; - The end piece is formed of a flexible material with a Shore A hardness between 30 and 65; - The end member is formed of a rigid material, the stiffness of which is defined by at least one value selected from the following: ultimate tensile strength greater than 40 MPa, tensile modulus greater than 2 GPa, flexural strength greater than 50 MPa, flexural modulus greater than 1.5 GPa, and IZOD impact strength greater than 20 J / m with notch and greater than 400 J / m without notch. Attached Figure Description

[0013] Other features, objects, and advantages of the invention will become apparent from the following non-limiting and illustrative description, which will be read in conjunction with the accompanying drawings, in which: [ Figure 1 [ ] is a longitudinal sectional view of a first embodiment of the application end member according to the present invention.

[0014] [ Figure 2 [ ] is a longitudinal sectional view of a variant of the first embodiment of the end piece.

[0015] [ Figure 3 ]yes Figure 2 The end piece in the middle along this Figure 2 A sectional view in the cross-sectional plane of line III-III.

[0016] [ Figure 4 [Illustration 1] is a longitudinal sectional view of a second embodiment of the application end member according to the present invention, showing the screw insertion into the end member.

[0017] [ Figure 5 ]yes Figure 4 A perspective view of the end component.

[0018] [ Figure 6 ]yes Figure 4 A longitudinal sectional view of the end piece, wherein the end piece is closed by a stop and the screw has been removed. Detailed Implementation

[0019] The end piece for applying the product according to the invention is configured such that the end piece can be fastened to a device for dispensing the product, such as a barrel gun.

[0020] Furthermore, this end piece is configured to allow the product to be applied to the screw. Figure 4 As can be seen, the screw A includes a screw head B and a screw shank C. The shank C has threads extending from the tip of the shank along at least a portion of its length.

[0021] Products that can be dispensed using this end piece are, in particular, greases, and especially mineral graphite greases. This type of grease enables the reduction of friction between mechanical parts (such as screws) and facilitates the tightening and loosening of mechanical parts.

[0022] First Embodiment Now combine Figure 1 The first embodiment of the present invention is described.

[0023] In this figure, it can be seen that the application end piece 1 has a longitudinal axis X-X'. The end piece 1 has two ends, namely the so-called "proximal" end piece 11, because it is the end that is configured to be fastened to the dispensing device (not shown in the figure), and the opposite so-called "distal" end piece 12.

[0024] The end piece 1 includes at least one chamber 2 for dispensing product onto the threads of the screw to be processed. The dispensing chamber 2 is in the form of a cavity. Preferably, the cavity is oblong. Also preferably, the chamber 2 is a cylindrical cavity, but the chamber may have a square or rectangular cross-section. Even more preferably, the cavity is axial, i.e., the cavity extends along the axis X-X'.

[0025] The chamber 2 is closed by the bottom 20 and opens at the distal end 12 of the end piece via the opening 21.

[0026] The dispensing chamber 2 is configured to receive the shank C of the screw A. Therefore, the diameter and length of the dispensing chamber are adapted to the size of the screw.

[0027] Advantageously, and as Figure 1 As can be seen, the dispensing chamber 2 includes at least one distal guiding region 22 for the handle C, and even includes a proximal guiding region 23 for the handle C. The diameters of these two guiding regions 22 and 23 are slightly smaller than the diameter of the rest of the cylindrical chamber 2.

[0028] The distal guide region 22 preferably extends from the opening 21 in the inward direction of the end member 1, and the proximal guide region 23 extends near the bottom 20. In the screw A shown as being inserted into the end member... Figure 4 In the diagram, we can see that these guide regions 22 and 23 are in contact with the shank C, while the middle portion 24 of the chamber 2, located between regions 22 and 23, is slightly spaced from the shank C of the screw.

[0029] These guide areas 22 and 23 facilitate the insertion and removal of the screw shank from the dispensing chamber 2.

[0030] Furthermore, preferably, the distal end 12 terminates in the rear surface 120 of the plane. Thus, when the screw A is inserted into the end piece 1, the screw head B, and more specifically the bottom surface B1 of the head B, abuts against the rear surface 120 of the plane.

[0031] The end piece 1 also includes a first chamber 3 for introducing the product. The chamber 3 is closed by a bottom 30.

[0032] The chamber 3 opens at the proximal end 11 of the end member via an opening 31. Preferably, the proximal end 11 of the end member terminates in a planar front surface 110, and the opening 31 leads to the surface 110.

[0033] Preferably, the first inlet chamber 3 is in the form of an elongated axial cavity, that is, the first inlet chamber extends along the axis X-X'.

[0034] The end piece 1 also includes multiple channels for dispensing the product to be applied, which connect the first inlet chamber 3 to the dispensing chamber 2. Therefore, the first chamber 3 is in fluid communication with the dispensing chamber 2.

[0035] exist Figure 1 In the embodiments shown, these distribution channels are axial or substantially axial, and are indicated by reference numeral 4.

[0036] Each dispensing channel 4 leads to the dispensing chamber 2 via at least one dispensing orifice 41. Preferably, these dispensing orifices 41 are located at the periphery of the chamber 2, and more preferably are evenly distributed on the circumference of the chamber 2, which allows the product to be evenly distributed over the entire periphery of the screw shank.

[0037] Preferably, the dispensing orifice 41 opens near the side wall and bottom 20 of the chamber, such that when the screw 1 is inserted into the chamber 2, the dispensing orifice 41 faces the tip of the screw 1 (see [link to relevant documentation]). Figure 4 Therefore, when the product is pushed into the end piece by the application device, the product beads exiting the orifice 41 are evenly distributed over the entire height of the screw shank.

[0038] Furthermore, each dispensing channel 4 leads to the introduction chamber 3 via a product extraction orifice 42. Preferably, these extraction orifices 42 are regularly distributed on the circumference of the chamber 3, allowing for uniform extraction of the applied product. Also preferably, the extraction orifices 42 are formed near the bottom 30 of the chamber 3.

[0039] exist Figures 4 to 6In another embodiment shown, each dispensing channel has a spiral shape and is marked with reference numeral 4'. Thus, each channel 4' spirally coils around the longitudinal axis X-X'. The extraction orifice of the channel is marked 42' and the dispensing orifice 41', and these orifices are preferably arranged around the periphery of chambers 2 and 3, more preferably regularly distributed on the circumference of chamber 3 and chamber 2, respectively, for the reasons described above.

[0040] The dispensing orifices 41 or 41' can also be unevenly distributed on the circumference of the chamber 2, for example, if it is desired to apply more product to only a portion of the screw.

[0041] Each channel 4' can also be distributed and include multiple distribution orifices 41'.

[0042] Advantageously, the dispensing orifice 41 or 41' (according to the embodiment of dispensing channel 4 or 4') has a cross-sectional area between -20% and 20% of the area of ​​a circle with radius r.

[0043] More preferably, the dispensing orifice 41 or 41' has a cross-sectional area equal to the area of ​​a circle with radius r.

[0044] The radius r is defined by the following formula: r=(υ.ρ.L.(Q / N).K)^1 / 4 -r is in meters. -υ is the kinematic viscosity of the product to be applied, in m² / s, and ρ is the density of the product to be applied, in kg / m³. 3 , -L is the length of the distribution channels 4 and 4' in meters. This length L is measured between the distribution orifice 41 and the extraction orifice 42 (or between 41' and 42'). -Q is the desired flow rate of the product to be applied, measured at opening 21 of distribution chamber 2, in meters per second (m). 3 / s, -N is the number of assigned channels 4 and 4' for the considered terminals 1 and 1'. -Constant K = 5.620E-11.

[0045] The kinematic viscosity and density of the product to be applied are measured at temperatures between 10°C and 40°C.

[0046] It should be noted that the cross-section of the dispensing orifice 41 or 41' is preferably circular, but it can also be elliptical, polygonal, or any other shape.

[0047] In addition, the proximal end 11 of the end piece 1 includes a fastening device 111, which is fastened to a product dispensing device (e.g., a product barrel gun).

[0048] In the example of the embodiment shown in the figure, the fastening device 111 is internally threaded. For this purpose, the proximal end 11 of the end piece includes a cylindrical housing 112 having a central axis X-X', which is arranged around the inlet chamber 3 and opens at the planar front surface 110. The inner surface of the housing 112 has internal threads 111. Therefore, the end piece 1 can be screwed onto the end of a dispensing device such as a product cylinder.

[0049] exist Figure 2 and Figure 3 In a variation of the embodiment of the end piece shown, the outer cylindrical surface 113 of the proximal end 11 is provided with external threads 115 to allow the end piece 1 to be fastened to the dispensing device.

[0050] The proximal end 11 may also be provided with any other type of fastening device, such as a clamp element or male / female assembly, to allow fastening to the product dispensing device.

[0051] exist Figure 2 From the variant, it can be seen that the distribution chamber 2 can be compared to Figure 1 In some embodiments, the length is shorter (e.g., to handle shorter screws). In this case, chamber 2 does not have a guide region.

[0052] Finally, Figure 3 In the cross-sectional view, the allocation channel 4 can be seen more clearly. In this example embodiment, the number of allocation channels 4 is five.

[0053] Use of terminal 1 As previously described, end piece 1 is fastened (e.g., by threaded connection) to the product dispensing device, and the screw A to be processed is inserted into the dispensing chamber 2. When the product to be applied is pushed into the end piece, it enters the inlet chamber 3, is distributed in different distribution channels 4 or 4' (depending on the embodiment), and reaches the distribution chamber 2, distributing across the entire circumference of the distribution chamber. The product is then uniformly applied to the entire external thread of the shank C of screw A.

[0054] Second Embodiment Now combine Figures 4 to 6 A second embodiment of the end piece marked 1' is described.

[0055] This end piece 1' allows the product to be applied not only to the external thread of the screw, but also to the bottom surface B1 of the screw head B.

[0056] The end piece 1' differs from the end piece described above in that it includes a second chamber 5 for introducing a product, which opens at the proximal end 11 of the end piece (more specifically at the front surface 110 of the plane).

[0057] When the fastening device for securing the end piece to the product dispensing equipment is an external thread 111, such as Figure 1 The second inlet chamber 5 is located in the continuation of the housing 112 (see above). Figure 4 and Figure 6 In other words, chamber 5 is further away from surface 110 than housing 112. When the cylinder is screwed onto external thread 111, the cylinder does not completely seal housing 112, meaning that the product can flow from the cylinder into the central portion of housing 112 until the product reaches the second inlet chamber 5.

[0058] Preferably, the second inlet chamber 5 is an annular shape with a central axis X-X'. The second inlet chamber 5 is arranged around the first inlet chamber 3 and is coaxial with the first inlet chamber.

[0059] The end piece 1' also includes a plurality of channels 6 for dispensing products. These channels 6 extend in an axial or substantially axial direction. These channels are arranged around the dispensing chamber 2 and around the dispensing channel 4 or 4'. In other words, the channels 6 are arranged radially outward relative to the central axis X-X' of the end piece 1' compared to the chamber 2 or the channels 4, 4'.

[0060] Each dispensing channel 6 leads to the second inlet chamber 5 at one of its two ends via a so-called discharge port 61, through which the product leaves the chamber 5.

[0061] Each dispensing channel 6 also opens at the other end of its two ends via dispensing orifice 62 at the front surface 120 of the planar surface of the distal end 12 of the end piece 1'.

[0062] Preferably, the discharge orifices 61 are evenly distributed on the entire circumference of the second inlet chamber 5 to ensure uniform distribution of the product in all distribution channels 6.

[0063] Similarly, preferably, the dispensing orifices 62 are evenly distributed over the entire circumference of the planar front surface 120 of the distal end 12 to ensure non-uniform distribution of the product on the bottom surface B1 of the screw (see...). Figure 4 ).

[0064] The second inlet chamber 5 is separate from the first inlet chamber 3, which allows for better product distribution in channels 6 and 4 or 4', respectively. Furthermore, the separation of grease flow in different channels provides control over the path taken by the grease, ensuring that the grease reaches both the distribution chamber 2 and the front surface 120 in the desired amount simultaneously.

[0065] Use of terminal 1' End piece 1' is fastened (e.g., by threaded connection) to the product dispensing device, and the screw A to be processed is inserted into the dispensing chamber 2, as previously described.

[0066] When the product to be applied is pushed into the end piece, the product enters the first inlet chamber 3 and the second inlet chamber 5. The product then flows simultaneously in the dispensing channel 4' and the dispensing channel 6.

[0067] Therefore, the spiral shape of the dispensing channel 4' is particularly advantageous because it increases the length of these channels compared to a straight variation of channel 4. This spiral shape allows the product to arrive at the dispensing chamber 2 with a delay, while the remainder of the product is conveyed through the dispensing channel 6 to the orifice 62 at the distal end 12.

[0068] In other words, the product reaches the external thread of the screw more synchronously with the product reaching the bottom surface of the screw head.

[0069] Regardless of variations in the embodiments of end member 1 or 1', the end member may also be provided with a collection chamber 7 for excess products (see...). Figures 4 to 6 ).

[0070] Preferably, the collection chamber 7 is annular, has a central axis X-X', and is disposed around the end members 1, 1', more preferably around the proximal end 11 of the end members.

[0071] At least one collection channel 71 connects to one of the dispensing channels 4, 4' and has an opening in the collection chamber 7. Therefore, in the event of product overflow, the product can flow from the dispensing chamber 2 back to the collection chamber 7.

[0072] Advantageously, and as in the example of the embodiment shown in the accompanying drawings, the collection chamber 7 may preferably be removably mounted on the end member around the proximal end 11 of the end member.

[0073] In this configuration, the collection chamber 7 is an enclosure defined by an inner wall 72 and an outer wall 73, the inner wall 72 having a shape that follows the contour of the proximal end 11. Furthermore, the inner surface 720 of the inner wall 72 is provided with an internal thread 73, while the outer surface 113 of the proximal end 11 is provided with an external thread 114 that mates with the internal thread 73.

[0074] Therefore, the collection chamber 7 can be screwed onto the proximal end 11 of the end pieces 1, 1' to recover excess product, or conversely, the collection chamber 7 can be unscrewed, for example, for discharge and cleaning.

[0075] Removable connections made by tightening / unscrewing can be replaced by any type of removable connection, such as interlocking or clamp connections.

[0076] Finally, the inner wall 72 is pierced to form an inner cavity 721 positioned facing the collection channel 71, so that the inner cavity is in fluid communication with the collection channel 71.

[0077] Finally, regardless of the variation in the embodiment of end piece 1 or 1', the end piece may be provided with a stop 8 to seal the dispensing chamber 2. This stop prevents the product retained in the chamber 2 after previous use from drying out.

[0078] To hold the stop 8 in place, a mating connection device is provided between the distal end 12 of the end piece and the stop 8. Figure 6 In the example of the illustrated embodiment, these mating connections are external and internal threads. An external thread 121 is formed on the outer surface of the distal end 12 of the end member, and an internal thread 80 is formed on the inner surface of the stop member 8. Other mating connections can be used, such as clamping or press-fitting assemblies, for example, by acting on the deformability of the stop member.

[0079] Regardless of the embodiment of end piece 1 or 1', a device for measuring the amount of product applied can be provided on the end piece. This measuring device may, for example, consist of a series of graduations formed on the outer surface of end pieces 1 and 1', facing the product dispensing chamber 2. These graduations are not shown in the figures. In this case, end pieces 1 and 1' are advantageously formed of a transparent or translucent material, allowing the user to see the level of the product contained in chamber 2 through the end piece, and using the graduations, the user can infer the height of the product applied to the screw. Knowing the dimensions of chamber 1 and the screw, the amount of product applied can be determined.

[0080] End piece 1 or 1' can be formed of a flexible material, preferably a material with a Shore A hardness between 30 and 65. For example, the material can be silicone. An advantage of this material is that the end piece can be used to apply products (e.g., grease) to screws of different diameters.

[0081] End member 1 or 1' may also be formed of a rigid material. In this case, the rigidity of the material used is defined by the fact that the material involves at least one of the following criteria (values): - Ultimate tensile strength above 40 MPa - Tensile modulus higher than 2 GPa - Bending strength higher than 50MPa - Flexural modulus above 1.5 GPa, -IZOD impact strength exceeding 20 J / m with a notch and exceeding 400 J / m without a notch.

[0082] More preferably, the rigid material relates to all five of the aforementioned standards.

[0083] An example of the rigid material is a photoplastic resin known by the trade name Loctite pro 476.

[0084] The end pieces 1 and 1' can also be formed from two parts made of materials with different flexibility. Therefore, preferably, the portion of the end piece 1 and 1' that includes the middle portion 24 of the dispensing chamber 2 and the distal guide region 22 is made of a more flexible material than the rest of the end piece. "The rest of the end piece" refers to the portion of the end piece extending from the proximal end 11 of the end piece, and more preferably the portion of the end piece including the fastening device 111 (in particular, the internal thread).

[0085] This allows for a more flexible material at the screw entry point and a less flexible material where the end piece is fastened to a product dispensing device (e.g., a gun).

[0086] Finally, preferably, the end pieces 1, 1' are manufactured by 3D printing or molding.

Claims

1. An end piece (1, 1') for applying a product to a screw, the end piece (1, 1') comprising a proximal end (11) and an opposing distal end (12), the proximal end being configured to be fastened to a device for dispensing the product, the end piece (1, 1') having a longitudinal axis (X-X'), characterized in that, The terminal includes: - At least one chamber (2) for dispensing the product, the dispensing chamber (2) having the form of a cavity, the cavity opening via an opening (21) at the distal end (12) of the end piece, and the dispensing chamber (2) being configured to receive the shank of a screw. - A first chamber (3) for introducing the product, the first chamber opening at the proximal end (11) of the end piece, and - A plurality of channels (4, 4') for dispensing the product, the plurality of channels connecting the first inlet chamber (3) to the dispensing chamber (2), each dispensing channel (4, 4') leading to the dispensing chamber (2) via at least one dispensing orifice (41, 41'), and these dispensing orifices (41, 41') being located at the periphery of the dispensing chamber (2).

2. The application end member (1, 1') according to claim 1, characterized in that, The cross-sectional area of ​​the dispensing orifice (41, 41') of the dispensing channel (4, 4') is between -20% and 20% of the surface area of ​​a circle with radius r, where r = (υ.PL(Q / N).K)^1 / 4, the radius r is in meters, and υ is the kinematic viscosity of the product to be applied, in m³. 2 / s, ρ is the density of the product to be applied, in kg / m³. 3 L is the length of the distribution channel (4, 4') in meters, and Q is the desired flow rate of the product to be applied, measured at the opening (21) of the distribution chamber (2), in meters. 3 / s, N is the number of distribution channels (4, 4') of the end piece, and the constant K = 5.620E-11, the kinematic viscosity and density of the product to be applied are measured at temperatures between 10°C and 40°C.

3. The application end member (1, 1') according to claim 1 or 2, characterized in that, The distribution orifices (41, 41') are regularly distributed around the circumference of the distribution chamber (2).

4. The application end member (1, 1') according to any one of the preceding claims, characterized in that, The end piece includes means for measuring the amount of product applied, such as a series of scales formed on the outer surface of the end piece facing the product dispensing chamber (2).

5. The application end member (1, 1') according to any one of the preceding claims, characterized in that, The product's distribution channel (4') is a spiral shape that coils around the longitudinal axis (X-X') of the end piece.

6. The application end member (1, 1') according to any one of the preceding claims, characterized in that, The channel (4) that dispenses the product extends axially.

7. The application end member (1') according to any one of the preceding claims, characterized in that, The dispensing chamber (2) is cylindrical and includes at least one guide region (22, 23) with a diameter smaller than that of the rest of the cavity.

8. The application end member (1') according to any one of the preceding claims, characterized in that, The distal end (12) of the end member includes a planar rear surface (120), and the end member (1') includes: - A second chamber (5) for introducing the product, the second chamber opening at the proximal end (11) of the end piece, and - Used to allocate multiple channels (6) of the product, Each dispensing channel (6) leads to the second inlet chamber (5) at one of its two ends and to the rear planar surface (120) of the distal end (12) of the end piece via a dispensing orifice (62) at the other end of each dispensing channel.

9. The application end member (1') according to claim 8, characterized in that, The second chamber (5) for introducing the product is annular and is arranged around the first chamber (3) for introducing the product and is coaxial with the first chamber.

10. The application end member (1, 1') according to any one of the preceding claims, characterized in that, The terminal includes: -Excess product collection chamber (7), and - At least one collection channel (71) that connects one of the product distribution channels (4, 4') to the excess product collection chamber (7).

11. The application end member (1, 1') according to claim 10, characterized in that, The excess product collection chamber (7) is annular and arranged around the end piece.

12. The application end member (1, 1') according to claim 10 or 11, characterized in that, The excess product collection chamber (7) is removably mounted on the end piece.

13. The application end member (1, 1') according to any one of the preceding claims, characterized in that, The end piece is provided with a stop (8) to seal the product's dispensing chamber (2), and the stop (8) and the distal end (12) of the end piece are provided with matching connection devices, such as external threads (121) and internal threads (80).

14. The application end member (1, 1') according to any one of the preceding claims, characterized in that, The proximal end (11) of the end piece is provided with means for fastening to the product dispensing device, such as internal thread (111) or external thread (115).

15. The application end member (1, 1') according to any one of the preceding claims, characterized in that, A portion of the end piece (1, 1') is formed of a more flexible material than the rest of the end piece.

16. The application end member (1, 1') according to any one of the preceding claims, characterized in that, The end piece is formed of a flexible material with a Shore A hardness between 30 and 65.

17. The application end member (1, 1') according to any one of claims 1 to 15, characterized in that, The end member is formed of a rigid material, the stiffness of which is defined by at least one value selected from the following: ultimate tensile strength greater than 40 MPa, tensile modulus greater than 2 GPa, flexural strength greater than 50 MPa, flexural modulus greater than 1.5 GPa, and IZOD impact strength greater than 20 J / m with notch and greater than 400 J / m without notch.

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