Projectile for compressed air carbins of the rifled barrel type

Abstract

 The invention relates to a projectile for compressed air carbins of the rifled barrel tipe. The projectile is pro­vided, preferably in its front section (A), with at least one ring of equispaced equal teeth (7) which are meant for allowing the projectile to be screwed into the helical furrows of the barrel riflings, so that the projectile will be imparted a rotatory axial motion that determines a high firing velocity of the same, and a considerable precision in the projectile forward motion.

Description

[0001] The invention relates to a projectile for compressed air carbins having their barrel provided with internal hel­ical riflings.

[0002] The projectile of the invention is characterized by the provision - preferably in its front section, of at least one toothed ring which is meant for being screwed into the riflings of a carbine barrel, so that a high firing velocity of the projectile, and a considerable capability of the pro­jectile of maintaining the laying direction thereof will be guaranteed.

[0003] Further features of the projectile forming the object of the invention, and the advantages arising therefrom, will become more clearly apparent from the following specifica­tion made by referring to the Figures of the annexed sheet of drawing, in which:

Figure 1 is a perspective view of the projectile ac­cording to one preferred embodiment of same.

Figure 2 is a perspective view showing an alternative embodiment of the toothed ring in the projectile front sec­tion.

Figure 3 is a perspective view showing still another alternative embodiment of the projectile, in which a toothed ring is provided near the airtight collar or collars for preventing air from escaping, located at the projectile rear end.

[0004] The projectile according to the invention is made from only one piece of lead or a lead alloy, or from any other suitable material (see hereinafter), and is obtained by any suitable known art.

[0005] In Figure 1 reference A denotes the projectile front section, substantially comprising a conical portion 1 and a cylindrical portion 2, which are connected to each other by an enlarged downwardly flaring small portion 3 being inter­posed therebetween. The diameter of portion 2 is suitably greater than the base diameter of portion 3.

[0006] A portion 4 in form of an upturned truncated cone ex­tends from the lower end side of portion 2.

[0007] Reference B denotes the rear section of the projectile, which comprises a truncated cone-shaped portion 5 and a cyl­indrical end collar 6.

[0008] The said portions 1, 2, 3, 4, 5, and 6 are set in a per­fectly coaxial relation.

[0009] The contradistinctive feature relative to the known em­bodiments of the projectile according to the invention, is the provision of at least one ring of equispaced teeth 7 at portion 2 of the projectile front section, and the said teeth 7 are characterized by such a typical profile that the same can be screwed into the internal helical riflings in a carbine barrel, whereby the projectile will be ejected from the carbine by being imparted a rotatory axial motion that improves the penetration of the projectile and the capabili­ty of the projectile of maintaining the laying direction thereof.

[0010] The dimensions and the spacing apart from each other of the teeth 7 depend on the characteristic dimensions and on the shape of the internal riflings in the carbine barrel, so that these parameters will be not disclosed in detail in the following.

[0011] The teeth 7 are parallel to the axis of the projectile, and preferably have a substantially trapezoidal profile, with their surface 107 being suitably rounded. It is however understood that the profile of said teeth 7 may be widely modified.

[0012] According to a modified construction, the teeth 7 may be suitably inclined, as in the example shown in Figure 2. In this case, the inclination of said teeth is preferably lim­ited to a not too high value.

[0013] According to another modified embodiment, not shown, more than one toothed ring set in a spaced apart relation by respective annular recesses, may be provided at the projec­ tile portion 2, and the teeth of one ring may be trued with the teeth of the adjoining toothed ring, or these teeth may be suitably offset, so that a function which is equivalent to the function of the inclined teeth shown in Figure 2, will be attained as a whole.

[0014] According to a further modified embodiment shown in Figure 3, the projectile may be provided in combination with, or as an alternative to the toothed ring or rings at the projectile front portion 2, with at least one ring of teeth 8 arranged close to, and directly upstream of the cyl­indrical rear end collar 6, this still for allowing the pro­jectile to be screwed into the riflings of a carbine barrel. A collar like the collar 6 may be provided also upstream of the toothed ring 8.

[0015] Also in respect of the ring of teeth 8, the same con­siderations apply, as previously made in connection with Figure 2.

[0016] The surface of the truncated cone-shaped rear portion 5 of the projectile according to the invention, may be smooth or, preferably, this surface may be suitably provided with a plurality of helical grooves 105 which are preferably in­clined by 45°, and are directed in the same sense as the barrel riflings, so that the aerodynamic properties and so the velocity of the projectile, and the capability of the projectile of maintaining the laying direction thereof will be improved.

[0017] It should be understood that differently from the em­bodiments as shown in the drawings, the projectile may not have a conical head end portion 1, but the same may have a convex front end as in the known art.

[0018] It should be also understood that the projectile may be covered with any suitable metallic or non-metallic material, and this in order to isolate the lead material of the pro­jectile and prevent the hands of a user from touching it, and in order to decrease the projectile sliding friction on the carbine barrel, and to improve the successive penetra­tion into air of the projectile, and to improve as well, if a particularly hard covering material has been used, the penetration of the projectile into the target.

Claims

1. A projectile for compressed air carbins of the rifled barrel type, characterized by being provided, prefer­ably in its front section (A), with at least one ring of equispaced equal teeth (7) which are meant for allowing the projectile to be screwed into the helical furrows of the barrel riflings, so that the projectile will be imparted a rotatory axial motion that determines a high firing velocity of the same, and a considerable precision in the projectile forward motion.

2. The projectile according to Claim 1, characterized by being provided in the outward surface of its truncated cone-shaped portion (5) forming its rear section (B), with a plurality of helical grooves (105) which are preferably inclined by 45° and have the same screwing direction as the barrel riflings, such an arrangement being provided for im­proving the aerodynamic properties and so the velocity of the projectile and the capability of the projectile of main­taining the laying direction thereof.

3. The projectile according to Claim 1, characterized by being provided with one or more projectile screwing toothed rings (7, 8) which are located in the projectile front section (A) and/or in its rear section (B), the teeth in said rings being either in a trued relation or being suitably offset.

4. The projectile according to Claim 1, characterized in that one or more airtight collars are provided at the front section (A) of the projectile, particularly when a toothed ring (8) is provided at its rear section (B).

5. The projectile according to Claim 1, characterized in that the teeth of the toothed rings (7, 8) provided in the front section (A) and/or in the rear section (B) of the projectile are parallel to the axis thereof.

6. The projectile according to Claim 1, characterized in that the teeth of the toothed rings (7, 8) provided in the front section (A) and/or in the rear section (B) of the projectile, are inclined by any suitable angle preferably of a not too high value.

7. The projectile according to Claim 1, characterized in that the same is made of lead or a lead alloy, or the like, and is covered with any suitable metallic or non-­metallic material, and this in order to isolate the lead material of the projectile and prevent the hands of a user from touching it, and in order to provide a smooth surface for decreasing the friction of the projectile, at first on the carbine barrel and then with air, and in order to im­prove, when required, the penetration of the projectile into the target, if the covering is made of a particularly hard material.

Drawing