SELF-PROPELLING BALLISTIC PROJECTILES
First Claim
1. A ballistic, self-propelling projectile adapted to be fired from a firearm having a helically grooved bore and capable of being totally expelled through said bore without leaving any residue in the firearm, said projectile comprising an expandable body of substantially cylindro-ogival shape, the maximum outer diameter of said body being equal to or slightly less than the diameter of said bore across the lands defined between said grooves, which body expands under pressure of firing and engages the lands of said bore, said body having a propellant cavity therein, said propellant cavity being substantially ogival;
- priming means in said propellant cavity; and
an outer, peripheral flange at the rear, terminal end of said body and integral therewith, the outer diameter of said rear peripheral flange being larger than the diameter of the bore across said lands, and serving as a stop for the projectile in the firearm chamber before firing, whereby, upon the projectile being fired and impelled through the bore, said rear peripheral flange is bit and deformed by the lands in the bore which in conjunction with expansion and engagement of the projectile body with the lands in the bore causes the projectile to spin while it travels through the bore.
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Accused Products
Abstract
Ballistic projectiles for firearms and more particularly to a self-propelling ballistic projectile which, upon firing, is totally expelled from the firearm without leaving a residual case therein.
22 Citations
4 Claims
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1. A ballistic, self-propelling projectile adapted to be fired from a firearm having a helically grooved bore and capable of being totally expelled through said bore without leaving any residue in the firearm, said projectile comprising an expandable body of substantially cylindro-ogival shape, the maximum outer diameter of said body being equal to or slightly less than the diameter of said bore across the lands defined between said grooves, which body expands under pressure of firing and engages the lands of said bore, said body having a propellant cavity therein, said propellant cavity being substantially ogival;
- priming means in said propellant cavity; and
an outer, peripheral flange at the rear, terminal end of said body and integral therewith, the outer diameter of said rear peripheral flange being larger than the diameter of the bore across said lands, and serving as a stop for the projectile in the firearm chamber before firing, whereby, upon the projectile being fired and impelled through the bore, said rear peripheral flange is bit and deformed by the lands in the bore which in conjunction with expansion and engagement of the projectile body with the lands in the bore causes the projectile to spin while it travels through the bore.
- priming means in said propellant cavity; and
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2. The ballistic, self-propelling projectile in accordance with claim 1 wherein said outer peripheral flange has a rectangular cross section.
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3. The ballistic self-propelling projectile in accordance with claim 1 wherein said expandable body is made of a brass alloy.
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4. The ballistic, self-propelling projectile in accordance with claim 1 wherein said propellant cavity is of cylindro-ogival shape.
Specification
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- Resources
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Current AssigneeOsvaldo Cesar Infantino
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Original AssigneeOsvaldo Cesar Infantino
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InventorsInfantino, Osvaldo Cesar
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Primary Examiner(s)Feinberg, Samuel
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Assistant Examiner(s)Tudor, H. J.
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Application NumberUS05/189,905Time in Patent Office967 DaysField of Search102/49.3,49.7,DIG.1,92.1,93 89/7US Class Current102/374CPC Class CodesF42B 15/00 Self-propelled projectiles ...
