Ammunition and explosives – Projectiles
Patent
1984-07-20
1986-10-14
Tudor, Harold J.
Ammunition and explosives
Projectiles
F42B 1100
Patent
active
046165681
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to projectiles intended to be fired by a firearm comprising a rear portion whose diameter determines the gauge of the projectile and a front portion of general conical configuration ending in a front point.
BACKGROUND OF THE INVENTION
Projectiles of this type known up to present had a front portion of general conical configuration and of simple shape which could be conical, ogival with a convex curvature, or ogival with a concave curvature. The shock effects on penetration of such a projectile were limited, which restricted the stopping power of the projectile.
SUMMARY OF THE INVENTION
According to the invention the projectile has increased shock effects with respect to conventional projectiles, because the front portion of the projectile has, between the front point and the rear portion, a front hollow zone connected to the front portion, a rear hollow zone connected to the rear portion. These two hollow zones are joined together by an intermediate zone formed by at least one bulging zone.
This arrangement makes possible, on penetration, a first shock effect produced by the bulge zone and a second shock effect produced by the rear hollow zone at the level of its connection with the rear portion of the projectile.
Furthermore, the bulge zone, situated between the two hollow zones, facilitates the use of a round of ammunition equipped with such a projectile in an automatic, semi-automatic or repeating weapon. In fact, said bulge zone facilitates the introduction of the ammunition in the chamber of the weapon, by cooperating with the access ramp to said chamber.
Advantageously, the rear portion comprises a succession of bulges separated by hollows. The diameter of the rear portion at the level of these bulges determines the gauge of the projectile.
Preferably, the radii of the curvature of the hollow zones of the front portion are equal to each other and equal to the radius of curvature of the bulge zone of said front portion. The radii of curvature may have a value equal to a third of the length of the front portion.
Also preferably, the radii of curvature of the bulge of the rear portion are equal to each other and equal to the radius of curvature of the hollows of said rear portion. The radii of curvature may have a value equal to a third of the length of the rear portion.
In a preferred embodiment of the invention, a recess is formed in the rear portion of the projectile and extends as far as its front portion.
The invention may in any case be well understood from the following description as well as the accompanying drawings which complement and which drawing is relative to a preferred embodiment of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
The single FIGURE of the drawing shows, in axial section, a projectile according to the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
This projectile has a rear portion N.sub.1, whose diameter determines the gauge of the projectile, and a front portion N.sub.2 of general conical configuration and ending in a front point A.
The front portion N.sub.2 has, between the front point A and the rear portion N.sub.1, a front hollow zone Z.sub.17 connected to the front point A, a rear hollow zone Z.sub.7 connected to the rear portion N.sub.1. These two hollow zones Z.sub.17 and Z.sub.7 are connected together by an intermediate zone formed by at least one bulge zone Z.sub.9.
The connection of this bulge zone Z.sub.9 with the rear hollow zone Z.sub.7 may be situated at two thirds of the length LN.sub.2 of the front portion N.sub.2, from the end of the front point A.
Advantageously, the rear portion N.sub.1 may comprise a succession of bulges P.sub.3,P.sub.2 separated by hollows P.sub.1. The diameter of the rear portion N.sub.1, at the level of these bulges P.sub.3, P.sub.2, determines the gauge of the projectile.
Preferably, the radii of curvature R.sub.17, R.sub.7 of the hollow zones Z.sub.17,Z.sub.7 of the front portion N.sub.2 are equal to each other and equal to the radius of curvature R.sub.9 of
REFERENCES:
patent: 1021685 (1912-03-01), Knaebel
patent: 3157126 (1964-11-01), Blondeau
patent: 3877381 (1975-04-01), McCoy
patent: 4005660 (1977-02-01), Pichard
patent: 4405100 (1983-09-01), Daniels
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