Abstract:
An extended range munition including a projectile having a generally cylindrical body includes a forward end and rearward end. The forward end includes a protruding member extending therefrom, thereby increasing the weight of said body and said forward end. The body is formed of a non-metallic material having a durometer hardness less than conventional metallic projectile.

Description:
FIELD OF THE INVENTION 
   The present invention relates generally to a munition designed to impact a target with low lethality. More particularly, the present invention relates to a less-lethal projectile having extended range capabilities. 
   BACKGROUND OF THE INVENTION 
   There is a well established need to provide a munition, having a projectile which can impact a target with a low likelihood of inflicting a lethal blow. The need for such a munition can be seen in numerous situations such as military and police applications, self-defense and even animal control. A desirable, less-lethal munition would be able to impart a stopping or disabling force on the target. 
   The art includes numerous examples of various projectiles, which are designed to impact the target with a less lethal force. One type of shotgun round designed for less lethal applications includes substituting a conventional shot gun slug with a flexible deformable sack which may contain particulate matter. The sack is designed to deform upon impact with the target, imparting a blow without significant penetration. Examples of such less lethal rounds are shown in U.S. Pat. Nos. 6,202,562 and 6,283,037. 
   Other examples of less-lethal shot gun rounds include slugs manufactured from deformable materials, which deform or spread out upon impact, thereby reducing incidences of penetration upon impact. An example of such rounds are shown in U.S. Pat. Nos. 3,952,662 and 5,691,501. Additionally, other rounds include destructible slugs carrying fluid or other substances within. Recreational paint balls are an example of such destructible projectiles and which are shown for example in U.S. Pat. Nos. 5,254,379 and 6,546,874. 
   Each of the projectiles of the prior art, which are designed to be less lethal, suffer from certain disadvantages. First, the projectile or slug itself is complicated and expensive to manufacture, as compared with traditional shot gun slugs. Second, many of the known, less-lethal rounds require use of specialized non-standard weapons. Lastly, most of the available shot gun rounds are not accurate over an extended range. This greatly reduces the effectiveness of the round. 
   It is, therefore, desirable to provide a less-lethal munition projectile which is easy to manufacture and provides effective, less-lethal impact over an extended range. 
   SUMMARY OF INVENTION 
   The present invention provides an extended range munition of low lethality. The munition includes a projectile having a generally cylindrical body with a forward end and a rearward end. The forward end includes an extending protruding member to increase the weight of the body at the forward end. The body is formed of a light weight low durometer non-metallic material which dissipates energy upon impact. 
   In a preferred embodiment the outer wall of the body may be dimpled. Also the rearward end of the body may include a hollow bore. 
   The present invention additionally provides a less-lethal shot gun round. The round includes a generally tubular hull having a forward end and an opposed rearward end. A base encloses the rearward end of the hull. A propellant is contained within the base. A wad is sealably positioned in the hull adjacent to rearward end. A projectile slug is carried in the hull. The slug is generally a cylindrical member, having an outer cylindrical wall. The slug further includes a solid head at a forward end of the cylindrical member, thereby increasing the weight of the slug at the forward end. The slug is formed of nonmetallic material having a durometer hardness less than conventional shot gun slug materials 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is an exploded view partially in section of an extended range munition projectile of the present invention in the form of a shot gun round. 
       FIGS. 2-4  show a shot gun slug of the present invention in combination with a wad. 
       FIG. 5  shows an alternate embodiment of the shot gun slug of  FIGS. 2-4 . 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   The present invention directed to an extended range less-lethal munition projectile. The projectile of the present invention may be fired from various weapons. The type of weapon employed dictates the type of cartridge in which the projectile is placed. For simplicity of description the projectile will be described with respect to a shot gun slug. It may be appreciated, however, that the present invention is not limited thereto. 
   As is shown in  FIG. 1 , round  10  of the present invention may include a base  12 , a wad  14  and a hull  16 , all of generally conventional construction. Such construction is shown for example in U.S. Pat. No. 6,202,562, issued Mar. 20, 2001, to Brunn et al and entitled, “Methods of Preparing a Low Lethally Projectile for Flight”, and U.S. Pat. No. 6,546,874, issued Apr. 15, 2003 to Vasel et al, entitled, “Non-lethal Projectile for Delivering an Inhibiting Substance to a Living Target,” incorporated herein for all purposes. 
   Base  12 , which is generally formed of metallic material, preferably brass, is a cup shape member having an open upper end defining a base interior  20 . Base interior  20  supports a propellant  22 , which is generally an explosive charge. The base  12  also supports at a lower end  24  thereof a primer  26 , which when struck, ignites the propellant. A wad  14  interposed between base  12  and hull  16  which sealably contains propellant  22  in compression sealing it from the hull. As shown herein by way of example, wad  14  is a generally disk shape, plastic member. However, as is well known in the art and as is shown further herein below, wad  14  may take various sizes, shapes and constructions, depending upon the application of the round. Hull  16  is an elongate, tubular member having an open end  30  adjacent base  12  and an opposed crimped, closed end  32 . Hull  16  of the present invention is typically formed of a plastic material. However, as is well known in the art, other materials and constructions for hull  16  may also be employed. In accordance with the present invention, hull  16  is designed to support one or more non-lethal projectile shot gun slugs  40 . 
   Referring more specifically to  FIGS. 2-5 , the projectile slug  40  of the present invention is shown. Slug  40  is a generally, elongate cylindrical member having a forward or front end  42  and a rearward end  44 . An outer cylindrical wall  46  extends between the two ends. The forward end  42  of slug  40  includes an outwardly extending dome shaped element  48  about a rim  49 , so that slug  40  has the size and shape of a conventional lead shot gun slug. The slug  40  may include a generally cylindrical bore  50 , extending partially through the body of slug  40 , and opening at end  44 . The particular construction of the slug, shown in  FIGS. 2 and 3 , results in the forward end  42  of the slug having an increased weight. Such weight distribution is provided in part by the hollow cylindrical bore adjacent end  44 , as well as the dome shaped element  48  extending from end  42 . The weight distribution of the slug of the present invention is such that its weight is biased—forwardly. The nose forward aerodynamics (similar to a badminton shuttlecock) allows the slug to function as an accurate projectile when fired, with little or no distortion in its flight path over an extended range. While the hollow bore  50  helps in weight distribution, it is contemplated that an aerodynamically stable slug may be provided which is completely solid, such as shown in  FIG. 4 . Slug  4 ′ of  FIG. 4  is identical to slug  40  of  FIGS. 2 and 3 . However, the central bore  50  has been eliminated and the slug is completely solid. 
   As shown in  FIGS. 2-5 , the large frontal area and the domed element  48  provides a greater frontal surface area than a flat surface. This helps dissipate energy on impact. In situations where the hull  16  includes a roll crimp  33 , the rim  49  serves to open the roll crimp upon firing. 
     FIGS. 2 ,  3  and  4  also show further embodiments of the wad, which may be employed by the slug of the present invention. Pressure wad  14 ′ is of the type more specifically shown and described in U.S. Pat. No. 6,502,516, issued Jan. 7, 2003, entitled, “Sabot Shot Gun Slug Assembly,” which is incorporated by reference herein for all purposes. The wad may be attached to the slug as shown in  FIG. 2 , or may be a separate member, as shown in  FIGS. 3 and 4 . 
   The less lethal shot gun slug of the present invention, while shaped to mimic a conventional lead shot gun slug of similar size, is formed of a material having low velocity and is resistant to target penetration upon impact. Preferably, the slug of the present invention may be formed from a plastic material or other natural or synthetic materials having a low hardness, such as rubber, foam or a wide variety of plastics. 
   It is contemplated that preferable results are obtained with materials having a durometer hardness, ranging from about between 20 and 90. With this construction and hardness of material, the plug  40  of the present invention will impact the target with low lethality and less incidences of penetration. 
   The present invention also contemplates modifying the outside cylindrical surface of slug  40 . 
   Referring now to  FIG. 5 , slug  40 ″ is shown. Slug  40 ″ provides for a dimpled cylindrical wall  46 ″. Dimples  49 ″, which may be formed uniformly along the outer surface of the slug. The dimples  49 ″ reduce the weight of the slug. Also the dimples  49 ″ reduce barrel friction upon firing. This reduces the charge required to establish the requisite velocity needed for firing. Such lower velocity is advantageous in firing less-lethal slugs. 
   Thus, the present invention provides an aerodynamic, extended range projectile of low lethality, which has a configuration which mimics a conventional slug of similar size, so that conventional weapons may be employed to fire the round.