Patent ID: 7793591

Claim:
A projectile cartridge assembly, comprising: a. a low pressure cartridge, having a first end and an open second end; b. a high pressure cartridge located in said first end of said low pressure cartridge, said high pressure cartridge including i. propellant; a burstable seal sealing said high pressure cartridge, configured so that when said propellant is ignited, said burstable seal bursts to allow hot propellant gases to escape toward said open second end of said low pressure cartridge; c. a projectile, seated in said open second end of said low pressure cartridge, said projectile including i. an ignitable payload, having a forward end and an aft end; ii. an aft closure located proximate said aft end of said ignitable payload; iii. a delay carrier attached to said aft closure; iv. wherein said delay carrier includes an input opening facing said low pressure cartridge and an output opening facing said ignitable payload; v. wherein said input opening is connected to said output opening by a passage through said delay carrier; vi. an igniter charge inside said passage proximate said input opening; vii. an output charge inside said passage proximate said output opening; viii. at least one delay column inside said passage lying between said igniter charge and said output charge; d. a sleeve surrounding said ignitable payload, with said sleeve being slidably attached to said ignitable payload; and e. wherein said sleeve is attached to said aft closure, so that when said output charge ignites said ignitable payload, said sleeve and said aft closure will be propelled away from said ignitable payload as a unit.