초록 ▼

Improvements in a reusable polyurethane projectile are presented. The reusable polyurethane projectile performs like a bullet or projectile because the projectile is essentially the same size and shape of a bullet and can be fed through a normal bullet clip into the breach of a gun, fired and ejecte

Improvements in a reusable polyurethane projectile are presented. The reusable polyurethane projectile performs like a bullet or projectile because the projectile is essentially the same size and shape of a bullet and can be fed through a normal bullet clip into the breach of a gun, fired and ejected. The reusable polyurethane projectile conforms to the rifling of the barrel of the firearm to spin the projectile and provide equivalent accuracy to a metallic bullet. Upon impact the projectile will flatten and then rebound to the original shape. Standard re-loading mechanisms can be used to install the projectile back into a prepared cartridge. The reusable projectile is fabricated from a casting process that increases the resistance of the polyurethane from melting when the hot gun gunpowder pushes the reusable projectile out of the barrel of the gun.

대표청구항 ▼

1. A method of making and using a reusable polyurethane projectile comprising: creating a mold for a projectile;measuring and mixing a urethane resin and a hardener to create a polyurethane mixture;said polyurethane mixture is blended with tungsten powder or copper powder;introducing said polyuretha

1. A method of making and using a reusable polyurethane projectile comprising: creating a mold for a projectile;measuring and mixing a urethane resin and a hardener to create a polyurethane mixture;said polyurethane mixture is blended with tungsten powder or copper powder;introducing said polyurethane mixture into said mold;applying a vacuum to a curing projectile;allowing said polyurethane mixture to cure;removing said cured polyurethane mixture from said mold;trimming at least one projectile from said cured polyurethane to create a polyurethane projectile;preparing a shell to accept said polyurethane projectile;inserting said polyurethane projectile into said prepared shell;using said polyurethane projectile in said prepared shell, andretrieving said polyurethane projectile for reuse in a prepared shell. 2. The method of making and using a reusable polyurethane projectile according to claim 1 wherein said polyurethane projectile has a hardness of between shore A 40 to 99, or shore D 10 to 50. 3. The method of making and using a reusable polyurethane projectile according to claim 1 wherein said introducing is with a casting, pouring or injecting. 4. The method of making and using a reusable polyurethane projectile according to claim 1 wherein said polyurethane is C3H7NO2. 5. The method of making and using a reusable polyurethane projectile according to claim 1 wherein said applying of said vacuum is applied to said mixture prior to said curing. 6. The method of making and using a reusable polyurethane projectile according to claim 1 wherein said projectile is not permanently deformed for rifling of a firearm. 7. The method of making and using a reusable polyurethane projectile according to claim 1 wherein said projectile further includes a metal insert placed at least partially within said projectile or a metal jacket placed at least partially around said polyurethane. 8. The method of making and using a reusable polyurethane projectile according to claim 7, wherein said insert or jacket alters kinetic inertial of said projectile. 9. The method of making and using a reusable polyurethane projectile according to claim 7 wherein said metal insert or said metal jacket is selected from a group consisting of lead, tin, iron, steel, brass, copper, aluminum and stainless steel. 10. A method of making and using a reusable polyurethane projectile comprising: creating a mold for a projectile;measuring and mixing a urethane resin and a hardener to create a polyurethane mixture;introducing said polyurethane mixture into said mold based upon the volume of at least one cavity of said mold;placing a metal insert placed at least partially within said projectile or a metal jacket placed at least partially around said polyurethane;said metal insert or said metal jacket is selected from a group consisting of lead, tin, iron, steel, brass, copper, aluminum and stainless steel;applying a vacuum to a curing projectile;allowing said polyurethane mixture to cure;removing said cured polyurethane mixture from said mold;preparing a shell to accept said polyurethane projectile;inserting said polyurethane projectile into said prepared shell;using said polyurethane projectile in said prepared shell, andretrieving said polyurethane projectile for reuse in a prepared shell. 11. The method of making and using a reusable polyurethane projectile according to claim 10 wherein said polyurethane projectile has a hardness of between shore A 40 to 99, or shore D 10 to 50. 12. The method of making and using a reusable polyurethane projectile according to claim 10 wherein said introducing is with a casting, pouring or injecting. 13. The method of making and using a reusable polyurethane projectile according to claim 10 wherein said polyurethane is C3H7NO2. 14. The method of making and using a reusable polyurethane projectile according to claim 10 wherein said applying of said vacuum is applied to said mixture prior to said curing. 15. The method of making and using a reusable polyurethane projectile according to claim 10 wherein said polyurethane mixture is blended with tungsten powder or copper powder. 16. The method of making and using a reusable polyurethane projectile according to claim 10 wherein said projectile is not permanently deformed for rifling of a firearm. 17. The method of making and using a reusable polyurethane projectile according to claim 10 wherein said insert or jacket alters kinetic inertial of said projectile.