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
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.
대표청구항▼
1. 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,
1. 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 internal surface and an external surface, and 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 low pressure cartridge, said low pressure cartridge including a high pressure cartridge receiver having an inner charge casing wall;e. providing a step in said inner charge casing wall; andf. forcing said high pressure case and said domed burst cup into said high pressure cartridge receiver so that said continuous side wall of said high pressure case 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 which laps over said external surface of said domed burst cup, thereby trapping said burst cup in said high pressure case. 2. A method for making a cartridge as recited in claim 1, further comprising plastically deforming a portion of said charge casing in order to create an interference fit with said high pressure case, thereby retaining said high pressure case in said charge casing. 3. A method for making a cartridge as recited in claim 1, wherein said step of providing propellant comprises providing an amount of propellant which fills substantially all of the volume enclosed by said high pressure case and said internal surface of said burst cup. 4. A method for making a cartridge as recited in claim 3, further comprising plastically deforming a portion of said high pressure cartridge receiver in order to create an interference fit between said high pressure cartridge receiver and said high pressure case, thereby retaining said high pressure case in said high pressure cartridge receiver. 5. A method for making a cartridge for the controlled delivery of a fluid as recited in claim 1, wherein said burst cup is embossed so as to rupture into a plurality of approximately uniform petals. 6. A method for making a cartridge as recited in claim 5, further comprising plastically deforming a portion of said high pressure cartridge receiver in order to create an interference fit between said high pressure cartridge receiver and said high pressure case, thereby retaining said high pressure case in said high pressure cartridge receiver. 7. A method for making a cartridge as recited in claim 1, wherein said step in said inner charge casing wall includes a fillet radius. 8. A method for making a cartridge as recited in claim 7, further comprising plastically deforming a portion of said high pressure cartridge receiver in order to create an interference fit between said high pressure cartridge receiver and said high pressure case, thereby retaining said high pressure case in said high pressure cartridge receiver. 9. A method for making a cartridge as recited in claim 1, wherein said step in said inner charge casing wall includes an angled chamfer. 10. A method for making a cartridge as recited in claim 9, further comprising plastically deforming a portion of said high pressure cartridge receiver in order to create an interference fit between said high pressure cartridge receiver and said high pressure case, thereby retaining said high pressure case in said high pressure cartridge receiver. 11. A method for making a cartridge as recited in claim 1, further comprising plastically deforming a portion of said high pressure cartridge receiver in order to create an interference fit between said high pressure cartridge receiver and said high pressure case, thereby retaining said high pressure case in said high pressure cartridge receiver. 12. A method for making a cartridge for the controlled delivery of a fluid, comprising: a. providing a low pressure cartridge, including a high pressure cartridge receiver bounded at least in part by an inner charge casing wall;b. providing a step in said inner charge casing wall;c. 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;d. providing propellant, contained within said hollow interior of said high pressure case;e. providing a domed burst cup, having an internal surface and an external surface, and 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; andf. forcing said high pressure case and said domed burst cup into said high pressure cartridge receiver so that said continuous side wall of said high pressure case 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 which laps over said external surface of said domed burst cup, thereby trapping said burst cup in said high pressure case. 13. A method for making a cartridge as recited in claim 12, further comprising plastically deforming a portion of said charge casing in order to create an interference fit with said high pressure case, thereby retaining said high pressure case in said charge casing. 14. A method for making a cartridge as recited in claim 12, wherein said step of providing propellant comprises providing an amount of propellant which fills substantially all of the volume enclosed by said high pressure case and said internal surface of said burst cup. 15. A method for making a cartridge as recited in claim 14, further comprising plastically deforming a portion of said high pressure cartridge receiver in order to create an interference fit between said high pressure cartridge receiver and said high pressure case, thereby retaining said high pressure case in said high pressure cartridge receiver. 16. A method for making a cartridge for the controlled delivery of a fluid as recited in claim 12, wherein said burst cup is embossed so as to rupture into a plurality of approximately uniform petals. 17. A method for making a cartridge as recited in claim 16, further comprising plastically deforming a portion of said high pressure cartridge receiver in order to create an interference fit between said high pressure cartridge receiver and said high pressure case, thereby retaining said high pressure case in said high pressure cartridge receiver. 18. A method for making a cartridge as recited in claim 12, wherein said step in said inner charge casing wall includes a fillet radius. 19. A method for making a cartridge as recited in claim 12, wherein said step in said inner charge casing wall includes an angled chamfer. 20. A method for making a cartridge as recited in claim 12, further comprising plastically deforming a portion of said high pressure cartridge receiver in order to create an interference fit between said high pressure cartridge receiver and said high pressure case, thereby retaining said high pressure case in said high pressure cartridge receiver.
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이 특허에 인용된 특허 (5)
Van Stratum,Bruce G., Controlled fluid energy delivery burst cartridge.
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