FR2642811A1 - Valve for dispensing a pressurised substance - Google Patents

Abstract

The invention relates to a dispensing valve for a pressurised fluid substance. The valve comprises a valve body 1 provided with a dispensing control lever 2 and is intended to be fixed to a container R of the substance. The valve body comprises a chamber 10 for inlet-dispensing of the substance, including elastic means 102 for holding the lever 2 and for holding a movable shut-off member 11 secured to the lever 2. A contact surface 100 forms a seat and is intended to receive the shut-off member 11. The valve body comprises at least one passage 101 for dispensing substance opening up level with the contact surface 100. The shut-off member is held on the contact surface forming a seat at rest and covers over the opening of the dispensing passage 101 and, upon movement of the dispensing control lever 2, uncovers the opening of the dispensing passage 101. Application to the production of containers for dispensing of pressurised substances, such as aerosol canisters or perfusion bottles.

Description

 The present invention relates to a valve for dispensing a fluid or viscous substance under pressure.

 Currently, the substances under pressure are presented in a form of aerosol can or not.

 In order to ensure the distribution of these substances, a distribution valve, such as for example shown in FIG. 1 in partial section, is fixed to the top of a reservoir R containing the substance under pressure to be distributed.

 Conventionally, such valves may comprise a valve body into which a hollow nozzle nozzle is inserted and mounted telescopically on a spring, the spring bearing on a boss formed at the bottom of the valve body. A flexible bellows, formed by a rubber washer, for example, ensures the sealing of the valve body, the assembly being crimped with the upper wall of the reservoir R.

The application of a finger pressure by a user has the effect of bringing the external hollow part of the nozzle into communication with the internal part of the valve bodies, which has the effect of ensuring the distribution of the substance under pressure.

 Such packages in the form of bombs give satisfaction with regard to their operation. However, by their very construction, they can only be used in applications of a limited nature for the following reasons.

 First, these packaging bombs can only have one dispensing orifice - and for a specific bomb model, under similar conditions of temperature and pressure for the same substance, there is substantially only a value of flow or flow of the substance dispensed. This has the effect of causing a reduction in the applications of this type of bomb and, consequently, of the substances capable of being distributed by them. It will indeed be understood that the distribution of these substances cannot be regulated in quantity or in flow in a precise and quantifiable manner, this type of bomb essentially making it possible to ensure the distribution or the non-distribution of the substance.

 A consequence immediately appears according to which this type of bomb cannot validly be used for the distribution of substances of medicinal or cosmetic nature for which a dosage, at least qualitative in quantity or in flow rate is indicated.

 In addition, in the case of medicinal and / or cosmetic substances more particularly intended for the treatment of burns or epithelial degradations, it is highly advantageous to be able to have available veins or sections of flow of distributed substance, in order to carry out a direct application. of it on the injured epithelial zone without noticeable mechanical spreading of the treatment substance.

 In addition, and in particular with a view to ensuring the packaging and distribution of drug or cosmetic emulsions, such as for example substances marketed under the trademark BIAFINE, it is essential that a minimum of the substance considered, placed in the vicinity of the valve body, is not isolated from the rest of the substance contained in the tank and subjected to undesirable contact with air, which can lead to oxidation of some of the components of these substances and ultimately a deterioration in quality of the product distributed.

 The purpose of the dispensing valve of fluid or viscous substance under pressure, according to the invention, is to remedy the aforementioned drawbacks.

 Another object of the present invention is the implementation of a fluid or viscous substance distribution valve under pressure for multiple use.

 Another object of the present invention is the implementation of a valve for dispensing a fluid or viscous substance capable of making it possible to carry out, as an emergency, infusions in an anti-gravity situation.

 Another object of the present invention is the implementation of a fluid or viscous substance distribution valve allowing at least a qualitative adjustment in quantity or flow of substance to be administered.

 The valve for dispensing a pressurized substance, object of the invention, comprises a valve body provided with a dispensing control lever, this valve body being intended to be fixed on a tank containing the pressurized substance.

 It is remarkable in that the valve body comprises an inlet-distribution chamber for the substance comprising elastic means for holding the distribution control lever. The valve body further comprises a movable closure member integral with the dispensing control lever. The admission-distribution chamber is provided with a contact surface forming a seat, intended to receive the closure member.

 The valve body has at least one distribution channel for the pressurized substance which opens out at the contact surface.

The shutter member is held on the contact surface forming a seat by the pressure of the substance and by the elastic means in the rest position, making it possible to obscure the opening of the distribution channel. Upon movement of the distribution control lever, the shutter member makes it possible to clear the opening of the distribution channel.

 The valve for dispensing a pressurized substance according to the invention is particularly suitable for equipping bombs with medicinal or cosmetic substances or infusion bottles in an antigravity situation.

A more detailed description of the subject of the invention will be given below in conjunction with the drawings in which, in addition to FIG. 1 relating to the prior art,
FIG. 2a represents, in a sectional view, along a longitudinal plane of symmetry, a valve for distributing substance under pressure mounted on a reservoir R to constitute a bomb, for example of aerosol type,
FIG. 2b represents a top view of FIG. 2a,
FIG. 2c represents a sectional view along the cutting plane aa of FIG. 2a,
FIG. 2d represents a sectional view along the cutting plane bb of FIG. 2a,
FIG. 2e represents, like FIG. 2c, a sectional view along the cutting plane aa of FIG. 2a of an embodiment according to a nonlimiting variant of the dispensing valve according to the invention,
3 shows a sectional view along a longitudinal plane of symmetry of a specialized cap for performing, for example by means of a bomb equipped with a dispensing valve according to the invention, an infusion in an anti-gravity situation.

 A more detailed description of a valve for dispensing a pressurized substance in accordance with the object of the present invention will be given in conjunction with FIGS. 2a to 2e.

 In accordance with FIG. 2a above, which represents in section along a longitudinal plane of symmetry a valve for distributing viscous substance or fluid under pressure according to the present invention, this comprises a valve body 1 provided with a control lever 2 of distribution. The valve body 1 is intended to be fixed to a reservoir R containing the fluid substance under pressure to be dispensed. Of course, and in a conventional manner, the valve body 1 can be made integral with the container R, either by screwing, or by gluing, by crimping or can also be an integral part of the container. When the valve body 1 is made integral by screwing, gluing or crimping, it can be introduced into the empty tank R during assembly, the bottom of this tank having been removed or not yet added to constitute the aforementioned tank.

 According to an advantageous characteristic of the valve which is the subject of the invention, the valve body I comprises, as shown in FIG. 2a, a chamber 1-0 for admission-distribution of the substance, this chamber comprising elastic means 102 for holding of the distribution control lever 2.

 A movable shutter member II is also provided, this member being integral with the lever 2 for distribution control.

 According to an advantageous characteristic, the inlet-distribution chamber 10 is provided with a contact surface 100 forming a seat, this surface being more particularly intended to receive the shutter member 11.

 The valve body 1 also comprises at least one channel 101 for distributing the substance under pressure, this channel opening out at the level of the contact surface 1 or.

 In the rest position, when the reservoir R has been filled with the pressurized substance to be dispensed, the closure member 11 is maintained on the contact surface 100 forming a seat, on the one hand, by the elastic means 152 and by the pressure of the substance to be dispensed, which is exerted on the shutter member 11. This shutter member 11 allows, on the one hand to obscure the opening of the dispensing channel 101, in the rest position of the assembly constituted by the distribution control lever 2 and by the shutter member 11, and, on the other hand, upon movement of the control lever 2 for distribution and ultimately the shutter member 11 opening the distribution channel 101 to ensure the distribution of the aforementioned pressurized substance.

 Of course, it will be understood that, in general and in order to facilitate the production and assembly of a bomb comprising a distribution valve as shown for example in FIG. 2a, the assembly constituted by the valve body 1, the chamber intake-distribution 10, the distribution control lever 2 and the shutter member 11 are substantially of revolution relative to the axis of symmetry, of the assembly.

 According to an advantageous characteristic of the dispensing valve object of the invention, the assembly constituted by the control lever 2 and by the closure member 11, as shown in FIG. 2a, this assembly possibly being constituted by a part single metal for example, produced by turning and turning, or by a piece of plastic material molded, is movable in translation in a direction parallel to the longitudinal axis of symmetry d of the inlet-distribution chamber 10 and the body valve 1.

 According to another particularly advantageous characteristic of the dispensing valve object of the invention, the same assembly constituted by the control lever 2 and by the closure member 11 is rotatable in a radial plane of the assembly constituted by the valve body 1, the inlet-distribution chamber 10, the distribution control lever 2 and the closure member 11. In FIG. 2a, the movable nature of the assembly constituted by the lever has been shown. control 2 and by shutter member 11 in a radial plane mentioned above by the four arrows representative of preferred radial planes in which the above-mentioned assembly is movable in rotation.

 According to the embodiment of FIG. 2a, and advantageously without limitation, the shutter member 11 is constituted by a substantially spherical part. The contact surface forming seat 100 is then also spherical and concave so as to form with the closure member 11 a ball-type joint.

 It will be understood, of course, that the valve body 1 can be made of materials such as plastics for example, the valve body 1 then being obtained for example by molding to form the inlet-distribution chamber 10 and the seat contact surface 100 suitably.

 It will also be noted that the elastic means 102 are mechanically integral with the valve body 1 and allow, on the one hand, the maintenance in the rest position of the assembly constituted by the distribution control lever 2 and by the member d obturation 11, even in the absence of substance under pressure in the tank R, and, on the other hand, the movement, either in translation of the above-mentioned assembly along the longitudinal axis A of aforementioned symmetry of revolution, or in rotation in a radial plane, containing this axis A, as already mentioned.

 It will be understood, of course, that to ensure the filling of the container to the reservoir R of substance under pressure to be dispensed, it then suffices to exert, for example, a displacement over the assembly constituted by the dispensing control lever 2 and the member shutter 11 to separate the shutter member 11 from the contact surface 11 forming a seat and jointly ensure the shutter of the distribution channel 101, the opposite end of the distribution valve 1, that is that is to say located in the vicinity of the control lever 2, then being connected to a pipe for supplying substance under pressure to be dispensed.

 When the pressure inside the tank R and the pressure substance distribution pipe is balanced, it is then enough to release the force exerted on the distribution control lever 2, the elastic means 2 then ensuring the return of the assembly constituted by the distribution control lever 2 and by the shutter member 11 in the rest position, the latter again being housed on the contact surface 100 forming a seat and thus ensuring the shutter of the distribution channel 101. The filling of the reservoir R with substance to be distributed is thus carried out.

 To ensure the distribution of the substance under pressure contained in the reservoir R after filling, it is then sufficient to apply a slight traction on the dispensing control lever 2 so as to cause the rotation in a previously described radial plane of the 'assembly constituted by the distribution control lever 2 and the shutter member 11. This rotation, in the aforementioned radial plane, has the effect of causing the rotation of the shutter member 1 1 and to release thus the distribution channel 101 for ensuring the distribution of the substance under pressure. Of course, the valve body 1 may include an arrow indicating the direction in which the rotation of the distribution control lever 2 must be carried out to ensure the opening of the distribution channel 101.

After relaxation of the traction in a radial plane of the distribution control lever 2, the elastic means 102 then allow the return of the assembly constituted by the distribution control lever 2 and by the shutter member 11 in the position of rest, the inlet orifice of the distribution channel 101 being again closed by the shutter member
It after returning to the equilibrium position of the latter.

 It will be understood, of course, that due to the total communication of the lower part of the intake-distribution chamber 15 with the reservoir R, no elementary part of the pressurized substance to be dispensed is isolated from the rest of the substance contained in the tank R, which makes it possible to guarantee optimal conditions of conservation of this same substance since the area of the valve or of the valve body 1 in contact with the outside air is reduced to the minimum, at most the area constituted through the ire1 distribution channel.

 A more detailed description of a particularly advantageous mode of construction of the dispensing valve object of the invention will be given in conjunction with FIGS. 2b and 2c.

 According to the above-mentioned embodiment, the elastic means 1C2 for holding the dispensing control lever 2 can advantageously be constituted by at least two parallel elastic rods 1521 and 1522 in FIGS. 2b and 2c. Preferably, the parallel elastic rods, such as 221 or 1022, can be made of a steel such as a spring steel having suitable elasticity qualities. As further shown in FIGS. 2c and 2b , the elastic rods preferably have a circular section, the lever 2 for controlling the distribution being forcibly engaged between the rods 1021 and I022. To this end, the distribution control lever 2 may have a substantially conical profile, and the circular section of the elastic rods 1521 and 1022 then makes it possible to ensure sliding contact on the conical wall of the distribution control lever 2.

 As shown in particular in FIGS. 2b and 2c, the elastic rods 1021 and 1022 are preferably placed symmetrically with respect to the longitudinal axis b of symmetry of the assembly formed by the valve body 1, the chamber intake-distribution 10, the shutter member 1I and the lever 2 for distribution control.

According to an alternative embodiment as shown in FIG. 2e, the elastic means 102 may advantageously be constituted by four elastic rods parallel in pairs 1021, 1022, 1023, 1024 in the aforementioned figure. A first set of rods 102A is formed by two parallel elastic rods, the rods 1021 and 1022 for example, this first set of rods being arranged perpendicular to a second set of rods 102B formed by the two other parallel elastic rods 1023 and 1024. will understand, of course, that in this case, the distribution control lever 2 is forced into the central intersection zone delimited by the two sets of rods 102A, 102B. It will of course be noted that the taper of the control lever 2 distribution is such that it opposes the translational movement along the longitudinal axis
8 of symmetry of the assembly when the distribution control lever 2 is pushed into the intake-distribution chamber 10.

 According to another advantageous characteristic of the embodiment, as shown in FIG. 2e for example, each set of parallel elastic rods 102A, 102B can have a different stiffness. The different stiffness characteristic of the sets of rods 102A, .102B can be imparted thereto, either by a choice of qualities of different spring steel materials, or by the choice of cross-sectional dimension of each rod constituting the sets of different rods, or possibly by a different choice of the free length of each elastic rod in the inlet-distribution chamber 10, the rods of greater stiffness having the smallest free length. In this case, the bore of the inlet-distribution chamber 10 at each set of elastic parallel rods considered can be adapted accordingly, the bore of the largest diameter to the free length of parallel elastic rods being the largest of the admission-distribution 10.

 It will thus be noted, in particular in the nonlimiting embodiment of FIG. 2e, that the effort to be exerted on the lever 2 of distribution control to ensure, firstly, the translation of the latter and the obturation body 11 along the longitudinal axis A, and secondly, the tilting of this same assembly in a radial plane of symmetry of each set of elastic parallel rods 102A or 102B, is then different, the effort the more important, for example, being able to be reserved for the effort necessary in order to ensure translation in translation along the longitudinal axis L of the assembly constituted by the lever 2 for distribution control and the shutter member 11.

 Another embodiment of the pressure substance distribution valve object of the present invention will be described in connection with Figure 2d.

 According to the aforementioned figure, the valve body 1 has a plurality 151, 103, 154, 105 of lateral distribution channels arranged radially with respect to the longitudinal axis A of symmetry of the assembly formed by the valve body 1, the admission-distribution chamber 10, the closure member II and the lever 2 for distribution control.

 As shown in Figure 2d, which is a sectional view along the sectional plane bb of Figure 2a, the distribution channels ire1, 103, 154, 155 are constituted by openings connecting, the inlet-distribution chamber 10 at the level of the contact surface forming seat 100 and the exterior of the valve body 1.

As shown, moreover, in a nonlimiting manner in FIG. 2b, each distribution channel 101, 103, 104, 1.5 can have different dimensions with respect to a neighboring channel so as to ensure flow rates different from pressurized substance to be dispensed when the valve is opened by tilting the sealing body II.

 Preferably, the distribution channels 101, 103, 104, 1G5 are arranged, as shown in FIG. 2b, parallel respectively perpendicular to the axis of symmetry of the sets of elastic rods 102A and 102B in the same plane P orthogonal to l 'axis of symmetry A of the assembly constituted by the valve body 1, the admission-distribution chamber 10, the closure member 1 1 and the lever 2 for distribution control. The aforementioned plane P, corresponding to the plane of the sheet on which FIG. 2d is represented, also corresponds to the section plane bb of FIG. 2a. Thus, the distribution channels 101, 103, 104, 105 are arranged in orthogonal directions. In addition, the previously mentioned plane P is offset towards the inside of the shutter member 11 and towards the lever 2 for controlling the distribution with respect to the common limit on the contact surface 100 forming a seat and on the obturation member 11. The obturation organ 11 can be constituted for example by a hemisphere, the plane P, when the body shutter 11 constituted by the hemisphere is in the rest position, the flat face of the hemisphere being orthogonal to the longitudinal axis, is then offset, as shown in Figure 2a so that all of the channels distribution 101, 103, 104, 105 aforementioned is then closed, the center of rotation of the assembly constituted by the lever 2 of distribution control and by the closure body 11 being located on the intersection of the diameter of the large circle formed by the flat face of the hemisphere forming the closure body 1 1 and the longitudinal axis A of the intake-distribution chamber 10 ,. of the distribution control lever 2 and of the shutter body 11. Thus, the tilting of the distribution control lever 2 and of the shutter body II around a virtual axis of rotation, corresponding to the diameter of the large circle formed by the flat face of the aforementioned hemisphere, allows to open at the opening only one of the distribution channels 101, 1û3, 104, 105 according to the direction of tilting of the lever 2 of distribution control in the plane radial defined by the plane of symmetry of one or other of the sets of elastic parallel rods 102A or 102B. It will of course be understood that in the case where only one set of parallel elastic rods is used, as shown in FIG. 2c, the operation is identical, the effort to be exerted to ensure tilting in a radial plane corresponding to the plane of symmetry of the set of rods 102, in the absence of a second set of parallel rods oriented in a perpendicular direction ire to the rod set 102, is then simply much weaker.

 Finally, it will be noted, according to a particularly advantageous but non-limiting characteristic of the embodiment of FIGS. 2c, 2d, 2e for example, that the distribution channels of large section or caliber can advantageously be arranged parallel to the set of parallel rods of most stiffness strong, the parallel rods of the set of rods of the lowest stiffness then conditioning the value of the tilting force to be exerted for the distribution channels considered, the latter then being able to be reserved for a distribution of substances under pressure in a substantially flow rate continuous and more important for the treatment of epithelial zones of larger surface for example. On the contrary, the distribution channels of smaller section are then oriented in line with the elastic rods of greater stiffness, in order to ensure a. substantially punctual release of the substance under pressure, the force to be applied to the distribution control lever 2 in this case being closer to an effort of the pulse regime type. In addition, in the case of FIG. 2c, the orthogonal tiltings to the parallel rods 1521 and 1522 can, in the same way, be reserved for successive and rapid punctual distributions of substances under pressure, while the pulls or tiltings parallel to the rods 1021, 1022, these rockings meeting less resistance, can be reserved for a substantially continuous restitution of products or substances with higher viscosity. Of course, it is possible to increase the effect of automatic closing of the distribution valve object of the invention by bringing the axes of each rod 1021, 1022 or 1023, 1024 closer to the longitudinal axis, so as to present a slight centering of the aforementioned rods.

 As shown in addition in FIG. 2a, the valve body 1 also includes an inlet-distribution channel 106 for the substance under pressure. The inlet-distribution channel 106 can be constituted by the upper part of the inlet-distribution chamber 1û, that is to say the part of the latter containing the lever 2 for distribution control. I1 can also, as shown - in FIG. 2a, be constituted by a bore or a substantially cylindrical orifice with a diameter smaller than that of the lower part of the admission-distribution chamber 10. The intake-distribution channel 106 leads, d on the one hand, at the level of the contact surface 100 forming a seat and, on the other hand, at the part of the valve body opposite the lower part of the inlet-distribution chamber 10. Thus, in the embodiment , as shown in FIGS. 2a, 2b, 2c for example, the elastic rods 1021, 1022, 1023, 1024 are preferably arranged at the end of the intake-distribution channel 106.

Of course, in order to constitute the dispensing valve which is the subject of the invention, it is necessary to provide a protective cap for the dispensing control lever 2 when the container or reservoir R having been filled with substance under pressure to be dispensed, and the packaging in a dispensing bomb having been carried out, no untimely operation of the lever 2 for distribution control can intervene. To this end, the outer wall of the valve body 1 can comprise a thread 107 intended to receive a protective cap 3:
In addition, and according to the particularly advantageous specificities of the dispensing valve object of the invention, the cap 3 can be constituted by a specialized cap, as shown in FIG. 3. The specialized cap can comprise an internal threaded part 30 and a rectified internal part 31 making it possible, after screwing the threaded part onto the corresponding threaded part 157 of the valve body 1, to close off the lateral distribution channels 101, 103, 154, 155.

 The specialized cap can then also advantageously comprise, as shown. in FIG. 3, an internal protruding part 32 intended during the screwing of the cap to exert an axial displacement of the closure body 11 and of the distribution control lever 2, so as to ensure the separation of the closure body 11 from the distribution surface 1G5 forming a seat and thus the distribution of the substance under pressure in an axial flow led by the inlet-distribution channel 1O6, the distribution channels 101, 1O3, 104, 105 having previously been closed externally by the specialized cap. The specialized cap can then be provided with a nozzle 33 intended to receive a catheter and any bomb conditioned with a pressurized fluid, such as for example visiological serum for example, equipped with a specialized cap as shown. in FIG. 3, then advantageously makes it possible to carry out infusions in an anti-gravity situation when, due to the urgency of the intervention, the subject to be treated is difficult to access. Of course, in this case the entire valve body I of the protective cap and of the specialized cap shown in FIG. 3 will have been subjected to sterilization for example, followed by conditioning in a sterile atmosphere.

 In order to ensure in particular in the case where perfusions have to be performed, an adjustment at least qualitative as a function of the nature of the substance to be introduced by perfusion, the valve body 1 may comprise downstream of the plane P containing the distribution channels 103, 101, 104, 105 lateral, with respect to the direction of axial displacement of the shutter member upon opening, a graduation 108 in flow rate of substance under pressure. It will be understood that this graduation may simply consist of different marks for each substance depending on the nature of it.

 We have thus described a particularly efficient pressurized substance distribution valve insofar as, due to the characteristics specific to it, a plurality of uses can be envisaged from the same packaging in a can of fluid substance or viscous under pressure.

 It will be understood, in particular, that the embodiments described above are not limiting. In particular, the hemisphere constituting the closure member 11 can be replaced by a solid sphere comprising notches coming after pivoting opposite the corresponding distribution channel. In this case, the conical section control lever 2 can be advantageously replaced by a prismatic type lever with four faces so as to center the notches in the aforementioned sphere. Of course, it is also possible to provide different shapes for the intake-distribution chamber 10 or the intake-distribution channel 106 insofar as the latter allow both the filling of the reservoir R and, in certain conditions, the distribution according to the lateral distribution channels or according to the axial distribution channel 106, the shapes of different sections can be envisaged without departing from the scope of the object of the present invention.

Claims (17)

 distribution (151).  control (2) to clear the opening of said channel  distribution channel (ire1), and, on the other hand, upon movement of said lever  rest position allowing, on the one hand, to conceal the opening of said  by the pressure of said substance and by the elastic means (102) in  shutter (11), held on said contact surface forming a seat  abouching at said contact surface (zoo), said member  minus one channel (ire1) for distribution of the substance under pressure  said shutter member (11), said valve body (1) comprising at  provided with a contact surface (100) forming a seat, intended to receive  distribution control, said inlet-distribution chamber being  distribution control, - a movable shutter member (11), integral with said lever (2) for  both elastic means (102) for holding said lever (2)  I. Valve for dispensing a pressurized substance, comprising a valve body (1) provided with a lever (2) for dispensing control and intended to be fixed on a reservoir (R) containing said pressurized substance, characterized in that said valve body comprises - an inlet-distribution chamber (10) of said substance, comprising  2. Valve according to claim 1, characterized in that said valve body (1), the inlet-distribution chamber (10), the distribution control lever (2) and the closure member (11) are substantially revolutionary.  3. Valve according to claim 2, characterized in that the assembly constituted by the control lever (2) and by the shutter member (11) is movable in translation in a direction parallel to the longitudinal axis of symmetry (A) of the inlet-distribution chamber (10) and of the valve body.  4. Valve according to one of claims 2 or 3, characterized in that the assembly constituted by the control lever (2) and by the shutter member (11) is rotatable in a radial plane of the 'assembly consisting of the valve body (1), the inlet-distribution chamber (in), the distribution control lever (2) and the shutter member (II).  5. Valve according to one of claims 1 to 4, characterized in that the closure member (11) is constituted by a substantially spherical part, said contact surface forming seat (100) also being spherical and concave so forming with said closure member (11) a ball-joint type joint.  6. Valve according to one of claims I to 5, characterized in that said elastic means (102) for holding the dispensing control lever (2) consist of at least two parallel elastic rods (ire21, 1022), said distribution lever (2) being forcibly engaged between said rods (lu21, 1022).  7. Valve according to claim 6, characterized in that said elastic rods (1021, 1022) are placed symmetrically with respect to the longitudinal axis of symmetry (A) of the assembly constituted by the valve body (1), the inlet-distribution chamber (10), the shutter member (11) and the lever (2) for distribution control.  8. Valve according to one of claims 6 or 7, characterized in that the elastic means (102) consist of four elastic rods parallel in pairs (1021, 1022, 1023, 1024), a first set (lO2A) of rods formed by two parallel elastic rods being arranged perpendicular to a second set (102B) of rods formed by two other parallel elastic rods.  9. Valve according to claim 8, characterized in that each set (102A, 102B) of parallel elastic rods has a different stiffness.  10. Valve according to one of the preceding claims, characterized in that said valve body (1) has a plurality (101, 103, 104, 105) of lateral distribution channels, arranged radially relative to the longitudinal axis ( -A) of symmetry of the assembly constituted by the valve body (1), the inlet-distribution chamber (10), the closure member (1 1) and the lever (2) for controlling the distribution .  11. Valve according to claim 10, characterized in that said distribution channels (101, 103, 104, 105) are arranged parallel, respectively perpendicular to the axis of symmetry of the sets (I 02A, 102B) of elastic rods in a same plane (P) orthogonal to the axis of symmetry of the assembly constituted by the valve body (1), the inlet-distribution chamber (10), the shutter member (11) and the lever ( 2) distribution control.  12. Valve according to claim 11, characterized in that said plane (P) is offset towards the inside of said shutter member and towards the lever (2) for controlling distribution relative to the limit common to said contact surface. forming a seat and the shutter member.  13. Valve according to one of claims 1 to 11, characterized in that said valve body (1) further comprises an admission-distribution channel (106) of the substance under pressure, said channel (106) blowing, a part. at the level of the contact surface (100) forming a seat and, on the other hand, at the part of the valve body opposite the lower part of said inlet-distribution chamber (10).  14. Valve according to claim 13, characterized in that said lever (2) for distribution control is disposed in said intake-distribution channel (106).  15. Valve according to one of the preceding claims, characterized in that the outer wall of said valve body (1) comprises a thread (lu7) intended to receive a protective cap (3).  16. Valve according to claim 15, characterized in that said cap (3) is a specialized cap comprising - a threaded part (30), - a rectified internal part (31) allowing, after screwing of the part  threaded, to ensure the closure of said lateral distribution channels  (101, 153, 104, 105), - an internal projecting part (32) intended, during the screwing of said cap,  exerting an axial displacement of said closure body (11) and of the distribution control lever (2), so as to ensure the separation of the closure body (11) from the distribution surface (100) forming a seat and the distribution of the substance under pressure in an axial flow conducted through the intake-distribution channel (106).  17. Valve according to claim 16, characterized in that said valve body (1) comprises downstream of the plane (P) containing said lateral distribution channels with respect to the direction of axial displacement of the shutter member at opening a graduation (108) in flow of substance under pressure.