초록 ▼

A high-low pressure ammunition cartridge includes a case containing a gas expansion chamber and a missile chamber separated from each other by a pressure containment wall containing one or more pressure control ports providing fluid communication between the gas expansion chamber and the missile cha

A high-low pressure ammunition cartridge includes a case containing a gas expansion chamber and a missile chamber separated from each other by a pressure containment wall containing one or more pressure control ports providing fluid communication between the gas expansion chamber and the missile chamber. The gas expansion chamber is located between the pressure containment wall and a base plate pressed into the back end of the case. The pressure containment wall may either be integral with the case or a separate piece which is removable from the case along with the base plate to facilitate reloading of the cartridge thereby reducing the cost of using the cartridge. The thickness of the base plate may be varied for varying the volume of the gas expansion chamber. Also, the thickness of the gas containment wall and number and size of holes in the gas containment wall may be varied for varying the velocity of the gas entering the missile chamber from the gas expansion chamber.

대표청구항 ▼

[ What is claimed is:] [1.] A high-low pressure ammunition cartridge comprising a case containing a gas expansion chamber at a rear section of said case and a missile chamber at a front section of said case, a plurality of base plates any one of which are removably connected to a rear end of said ca

[ What is claimed is:] [1.] A high-low pressure ammunition cartridge comprising a case containing a gas expansion chamber at a rear section of said case and a missile chamber at a front section of said case, a plurality of base plates any one of which are removably connected to a rear end of said case, each of said base plates containing an opening for receiving an explosive propellant which when burned produces a high pressure gas that is released into said gas expansion chamber, said base plates having different wall thicknesses for selective use of said base plates with a given size case for varying the volume of said gas expansion chamber within said case, a pressure containment wall intermediate said gas expansion chamber and said missile chamber, and at least one gas control port extending through said pressure containment wall for controlling the velocity of the gas entering said missile chamber from said gas expansion chamber for propelling missiles from said missile chamber at a controlled velocity. [15.] A high-low pressure ammunition cartridge comprising a case containing a gas expansion chamber at a rear section of said case and a missile chamber at a front section of said case, a base plate at a rear end of said case, said base plate containing an opening for receiving an explosive propellant which when burned produces a high pressure gas that is released into said gas expansion chamber, a pressure containment wall intermediate said gas expansion chamber and said missile chamber, and at least one gas control port extending through said pressure containment wall for controlling the velocity of the gas entering said missile chamber from said gas expansion chamber for propelling missiles from said missile chamber at a controlled velocity, said base plate being removably connected to said rear end of said case, and said gas containment wall comprising a separate disk that is removably received in said case from said rear end before said base plate is removably connected to said case, said case having an internal shoulder providing a stop for said disk, and said base plate having an outer sleeve that is pressed up against said disk when said base plate is removably connected to said case and said disk is pressed up against said stop to maintain said disk in engagement with said stop. The cartridge of claim 15 wherein said shoulder has a radially inwardly extending rear face that provides said stop for said disk and a radially inwardly extending front face axially spaced from said rear face, said shoulder having an opening extending between said rear and front faces in which a stepped end of said disk is received. The cartridge of claim 16 wherein said stepped end of said disk is flush with said front face of said shoulder. The cartridge of claim 15 wherein any one of a plurality of separate disks of different thicknesses are removably received in said case to provide for selective use of said disks with a given size case for varying the length of said gas control ports in said disks, and any one of a plurality of base plates having different length outer sleeves that press up against said disks are removably connected to said case to provide for selective use of said base plates with different thickness disks for varying the volume of said gas expansion chamber within a given size case. The cartridge of claim 15 wherein any one of a plurality of separate disks having different numbers of gas control ports are removably received in said case to provide for selective use of said disks with a given size case.