US 2010/0147177 A1 · Fluid energy delivery burst cartridge

Abstract

A modified fluid delivery cartridge. A conventional straight-sided high pressure cartridge case is primed and then filled with solid propellant. A burst cup is inserted in the case mouth. The burst cup is preferably embossed with a cross or other shape to promote predictable rupture. A charge casing is provided which opens into a high pressure cartridge receiver bounded by an inner charge casing wall. The inner charge casing wall is provided with a step, in which the diameter of the high pressure cartridge receiver is reduced. The high pressure cartridge case is pressed into the receiver in the charge casing wall. As the high pressure cartridge case is being pressed into place, the straight wall of the case passes over the step in the inner charge casing wall, which deforms the straight wall to form a neck. This neck captured the burst cup within the high pressure cartridge case.

Claims20

Dependent claims

A cartridge for the controlled delivery of a fluid comprising:

a. a high pressure case, having a closed first end, an open second end, and a continuous side wall running between said first and second ends, thereby defining a hollow interior;
b. propellant, contained within said hollow interior of said high pressure case;
c. a domed burst cup, having an open first end and a closed second end thereby defining a hollow interior within said burst cup, with said burst cup being placed within said open second end of said high pressure case;
d. a charge casing surrounding said side wall of said high pressure cartridge, with said charge casing having an inner charge casing wall;
e. a step in said inner charge casing wall;
and
f. a neck in said side wall of said high pressure case lying proximate said step in said inner charge casing wall.

4 more elements

A method for making a cartridge for the controlled delivery of a fluid, comprising:

a. providing a high pressure case, having a closed first end, an open second end, and a continuous side wall running between said first and second ends, thereby defining a hollow interior;
b. providing propellant, contained within said hollow interior of said high pressure case;
c. providing a domed burst cup, having an open first end and a closed second end thereby defining a hollow interior within said burst cup, with said burst cup being placed within said open second end of said high pressure case;
d. providing a charge casing surrounding said side wall of said high pressure cartridge, wherein said charge casing includes a high pressure cartridge receiver having an inner charge casing wall;
e. providing a step in said inner charge casing wall;
and
f. forcing said high pressure case into said high pressure cartridge receiver so that said continuous side wall slides against said inner charge casing wall and is deformed as said continuous side wall passes over said step to form a neck in said continuous side wall.

4 more elements

Dependencies are inferred from the claim text.

Fluid energy delivery burst cartridge

Life of this patent

Fluid energy delivery burst cartridge

Life of this patent

Abstract

Claims20