CONNECTING HEAD ADAPTED TO CONNECT A COMPRESSED AIR DISPENSING DEVICE AND AN ELEMENT IN WHICH TO INSUFFLATE SAID COMPRESSED AIR

Abstract

A connecting head between adapted to connect a compressed air dispensing device and an element in which to insufflate said compressed air is involved, which comprises a connecting body (2) adapted to be fastened to the dispensing device by means of a flexible duct, a duct (3) being present within said body, and adapted to connect the flexible duct and the element within which to insufflate, which is connectable to the body by means of a valve (4) with threaded end (5) that is insertable into an outlet hole (6) of the duct (3), an arm (7) being also present, pivoted to the body (2) at an axis (8) of the arm (7) perpendicular to the longitudinal axis (9) of the body, an elastic means (10) being also provided, acting on said arm (7), determining the reversible interlock fastening between the body (2) and valve (4), said fastening being separable by an action on the arm (7), overcoming the action of the elastic means (10), wherein said arm (7) presents a first portion (7″) adapted to be in contact, in the position of rest, with the side (12) of the thread of the threaded end (5) of the valve (4), thereby determining the reversible engagement of the connecting body (2) with said valve (4). Said head is characterised by the fact that the first portion (7″) is sloped with respect to a second portion (7′) of the arm (7) placed before the axis (8), in order to form an acute angle (α) with said second portion (7′).

Claims

1-5. (canceled)

6. A connecting head adapted to connect a compressed air dispensing device and an element in which to insufflate said compressed air, said connecting head comprising which comprises a connecting body adapted to be fastened to the dispensing device by means of a flexible duct, a duct being present within said body, and adapted to connect the flexible duct and the element within which to insufflate, which is connectable to the body by means of a valve with threaded end that is insertable into an outlet hole of the duct, an arm being also present, pivoted to the body at a pivoting axis of the arm per-pendicular to the longitudinal axis of the body, an elastic means being also provided, acting on said arm in order to determine the mutual engagement between one portion thereof or an element connected to said arm, and the threaded end of the valve, this determining the reversible interlock fastening between the body and valve, said fastening being separable by an action on the arm, overcoming the action of the elastic means, wherein said arm presents a first portion adapted to be in contact, in the position of rest,. with the side of the thread of the threaded end of the valve, thereby determining the reversible engagement of the connecting body with said valve, wherein the first portion is sloped with respect to the second portion of the arm placed before the pivoting axis of the arm, in order to form an acute angle with said second portion.

7. The head, according to claim 6, wherein the first portion of the arm is sloped in order to arrange itself substantially per-pendicular to the side of the thread of the threaded end, when the arm is subject only to the action of the elastic means.

8. The head, according to claim 6, wherein the elastic means consists of a helical spring, located in a hole, formed in the connecting body, said hole having an axis not perpendicular to the longitudinal axis of said body.

9. The head, according to claim 6, wherein it is made of a zamak single body.

10. The head, according to claim 6, wherein for the mutual pivoting between the arm and body, two protrusions are provided on said body, mutually aligned along an axis perpendicular to the longitudinal axis of the body, said protrusions being insertable into holes formed on side ex-tensions of the arm.

Description

[0012] The present invention will be described in detail below, in some particular embodiments thereof, made only by way of non-limiting example, with the help of the accompanying drawing tables, in which; [0013] FIG. 1 illustrates a perspective view of the assembly consisting of the connecting head according to the invention and a valve with threaded end insertable in the afore-mentioned; [0014] FIG. 2 illustrates a longitudinal section view of said assembly, according to the line II-II of FIG. 3; [0015] FIG. 3 illustrates a top plan view of said assembly; [0016] FIGS. 4 and 5 show two views, respectively, in plan from above and in longitudinal section according to the line V-V of FIG. 4, of said assembly, with the valve in the insertion phase; [0017] FIGS. 6 and 7 show the same views corresponding to those of FIGS. 4 e 5, wherein the valve is completely coupled to the head; [0018] FIG. 8 shows a partial section view of the elements that determine said coupling, made according to the line VIII-VIII of FIG. 6; [0019] FIG. 9 illustrates an exploded view of the connecting head; [0020] FIG. 10 shows an exploded view of said head as well, partially sectioned with a plane transverse with respect to its longitudinal axis.

[0021] As visible in particular from FIGS. 1, 2 and 3, the connecting head 1 according to the invention comprises a connecting body 2 adapted to be fastened to the compressed air dispensing device, consisting mainly of a compressor or a special tank by means of a flexible duct, not shown in the figures.

[0022] With known methods, the fastening between the flexible duct and the body 2 is made by means of a tubular element, shaped like a barb, as previously stated.

[0023] Observing the FIGS. 1 and 2, it can be seen that within the connecting body 2, a duct 3 is present and adapted to connect the flexible duct with the element within which it is intended to insufflate the compressed air. In particular, this duct 3 leads outwards with an outlet hole 6, inside which a threaded end 5 of a valve 4 that is present in the element inside which to insufflate can be inserted. It should be noted that the valve 4 is illustrated only by way of example and may also take on forms and aspects that are considerably different from those shown in the figures. What is important is that it has indeed a threaded end 5 adapted to be inserted in the duct 3.

[0024] An arm 7 is pivoted to the connecting body 2 at a pivoting axis 8 of the arm 7 perpendicular to the axis 9 of the body, on which arm an elastic means 10 (see FIG. 2) acts, in this case constituted by a helical spring. Said spring acts in the direction of tending to bring the arm 7 into the sloped position shown in FIGS. 1 and 2 with respect to the longitudinal axis 2. Vice versa, the user can, generally with the use of his fingers, push a second portion 7′ placed before the pivoting axis 8 of the arm 7 (FIG. 1), overcoming the action of the elastic means 10, causing the arm 7 to be arranged substantially parallel to the axis 9 of the body 2.

[0025] As can be seen in particular in FIG. 2, at the end of the arm 7 that is the closest to the body 2, a first portion 7″ is provided and folded with respect to the remaining part of the aforesaid arm. From the operational point of view, as can be seen in FIGS. 4 and 5, when the threaded end 5 starts being inserted into the valve 4 within the body 2, the mutual engagement between the first portion 7″ and said threaded end 5 is determined.

[0026] The operation is made possible by a force action exerted with the direction of the force F, indicated in the figure, on the second portion 7′ of the arm 7 placed before the pivoting axis 8, overcoming the action of the spring 10, so as to arrange the arm 7 substantially parallel to the axis 9 of the body 2, in such a way that the first portion 7″ does not interfere with the thread 5 during said insertion phase.

[0027] Vice versa, as visible in figures from 6 to 8, once the valve 4 has been completely inserted into the body 2 and the arm 7 is released, which is therefore subject to the action of the spring 10 only, the mutual engagement between said first portion 7″ and the toothing of the threaded end 5 is determined, which causes the mutual coupling between valve 4 and body 2.

[0028] Obviously, the type of material, the shape and the dimensions of the components of the punched sheet can be the most varied, according to the design requirements of the box, without thereby departing from the scope of the claims defined below.

[0029] From a constructive point of view, the body of the head will advantageously be made of zamak. Also advantageously, to determine the pivoting of the arm 7 to said body 2, two side protrusions 20 are provided on said body, arranged aligned along the transverse pivoting axis 8. Said protrusions are adapted to be inserted into special holes 21 formed on the side extensions 22 of the arm 7, thus determining the pivoting of the arm 7 to the body 2. In this way it is possible to eliminate the presence of a special pin passing inside the body, as well as the pivoting by riveting to ensure this pivoting, to the benefit of the overall cheapness of the realisation.

[0030] Furthermore, from the figures it can be seen that the arm 7 has an elongated shape. In particular, the second portion 7′ of the arm 7 has a plurality of teeth 7′″ on its surface, to facilitate the grip between the user's fingers and said arm. Furthermore, as visible in particular in FIGS. 2, 5 and 7, the helical spring 10 is partially arranged within a hole which has an axis 30 not perpendicular to the longitudinal axis 9 of the body 2, this inclination being such as to cause that this axis is perpendicular to the surface of the arm 7 in the rest position (see in particular FIG. 7).

[0031] In this way the spring 10 can exert its action optimally on the arm 7, without determining inappropriate twists on the aforesaid one.

[0032] As can be seen in particular in FIGS. 5 and 7, the first portion 7″ of the arm 7 is sloped with respect to the remaining part of the aforesaid arm so that it is arranged substantially perpendicular to the side 12 of the thread. In this way, an effective mutual engagement is obtained between said portion and the threaded end 5, ultimately determining the mutual locking between valve 4 and body 2, which is exactly what is wished. Reiterating that the perpendicularity between the first portion 7″ and the side 12 of the thread is the optimal solution, it should be specified, however, that other inclinations between said two elements also fall within the scope of the present patent.

[0033] From the operational point of view, we have seen that, by acting on the arm 7 as visible in particular in FIG. 5, any interference between the first portion 7″ and the threaded end 5 is avoided.

[0034] It should also be considered that, by inclining the second portion 7′ in such a way that it forms an acute angle α (FIG. 7) with respect to the remaining portion of the arm 7, it is ensured that it is possible to insert the valve 4 without any problem within the body 2 up to the desired level, even without pressing the arm 7; vice versa it is evident that once the arm 7 is released (see FIG. 7) the mutual engagement between the first portion 7″ and the side 12 of the thread of the threaded end 13 of the valve takes place, thereby determining the mutual engagement between body 2 and valve 4.

[0035] From the foregoing, therefore, it can be seen how the device according to the invention allows an easy mutual connection operation between the connecting body of the connecting head with the valve 4 present in the element in which to insufflate the compressed air, while ensuring absolute safety of said connection during the operational phase.