초록 ▼

A high-pressure self-sealing obturator positioned to fit on the rear of a sabot assembly in a discarding projectile assembly to prevent the obturator from backing off during initial impact of bore walls by the projectile assembly. The obturator includes an extension and a groove for snapping a case

A high-pressure self-sealing obturator positioned to fit on the rear of a sabot assembly in a discarding projectile assembly to prevent the obturator from backing off during initial impact of bore walls by the projectile assembly. The obturator includes an extension and a groove for snapping a case mouth into the extension. The outer surface of the obturator conforms with the bore of the gun. The extention of the obturator also includes a “V”groove which permits the separation of the extention with the case mouth during the initial low pressure which occurs early ignition. The self-sealing obturator provides efficient and improved obturation for a projectile when fired from a high pressure gun tube.

대표청구항 ▼

A discarding sabot projectile assembly for a gun tube which comprises: (a) sub-caliber projectile having a tail end and a tubularly shaped midsection, said midsection having a plurality of external concentric buttress grooves circumferentially disposed therein; (b) segmented sabot assembly means sur

A discarding sabot projectile assembly for a gun tube which comprises: (a) sub-caliber projectile having a tail end and a tubularly shaped midsection, said midsection having a plurality of external concentric buttress grooves circumferentially disposed therein; (b) segmented sabot assembly means surrounding said mid sections for use as a full caliber carrier for said sub-caliber projectile and for obturating propellant gases during projectile launch, which includes; a plurality of sabot ramp surfaces on an outer surface of said sabot assembly means, said plurality of sabot ramp surfaces being tapered to a rear of said sabot means; (c) a centering band seat operatively disposed in said sabot means; (d) a centering band positioned in said centering band seat having a tapered face to a rear of the sabot means, said tapered face of said centering band being an extension of one of said sabot ramp surfaces a centering band during extrusion prevents initial low pressure gases from escaping; and (e) a self-sealing obturator having an rearward extension for a mating case mouth cemented to the obturator to reduce movement of the obturator, and outer surface of the obturator conforming to chamber walls of the gun tube, and obturator ramp means in contact with said sabot ramp surfaces and said tapered face of said centering band for producing intimate contact between said outer surface of said obturator and said gun tube, said propellant gases forcing said obturator ramp means to slide on said sabot ramp surfaces and to continually feed material of the obturator between said gun tube and said centering band, and a retaining lip on said obturator ramp means to overlap a retaining surface on said plurality of sabot ramp surfaces on the sabot means which prevents said obturator from backing off during initial impact against bore walls of said gun tube.