Projectile assembly with stabilization/obturation enhancement
First Claim
1. A projectile assembly for conveying a projectile through a firearm barrel, the projectile assembly comprising:
- a sabot, a single slug sized for the sabot, and a pusher plate,the sabot formed of a polymer and having a central longitudinal axis, a forward end, a rearward end and a generally cylindrical outer surface, the sabot comprising;
a projectile seating base with a rear surface at the rear end of the sabot and a forward projectile seating surface opposite the rear surface;
a plurality of wings unitary with and extending forwardly from the projectile seating base and positioned circumferentially around the forward projectile seating surface, the forward projectile seating surface and wings defining a cup for receiving a projectile, the wings openable outwardly for releasing the projectile after the sabot and projectile leave the firearm barrel;
the pusher plate comprising;
a disc portion positionable at the rear surface of the projectile seating base, the disc portion having a periphery;
at least one projection extending from the disc portion axially forward, the at least one projection displaced from the periphery of the disc, the disc portion abutting against the rear surface of the sabot and the projection extendable into the projectile seating base of the sabot, wherein the pusher plate is formed of a material more rigid than polymer of the sabot and is configured to not obturate the firearm barrel.
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Accused Products
Abstract
A projectile assembly comprises a base portion for receiving projectiles such as slugs and has an associated pusher plate at a rear end thereof for minimizing or controlling deformation of the rear end of the base portion during firing. The pusher plate has a disc with one or more axially extending projections that extend axially into the rearward end of the base portion thereby reinforcing the base portion and upon firing providing uniform axial deformation and/or obturation of the base portion with respect to a firearm barrel. The projectile assembly may be, for example, part of a shotgun shell slug cartridge, and provides enhanced accuracy over the prior art.
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Citations
20 Claims
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1. A projectile assembly for conveying a projectile through a firearm barrel, the projectile assembly comprising:
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a sabot, a single slug sized for the sabot, and a pusher plate, the sabot formed of a polymer and having a central longitudinal axis, a forward end, a rearward end and a generally cylindrical outer surface, the sabot comprising; a projectile seating base with a rear surface at the rear end of the sabot and a forward projectile seating surface opposite the rear surface; a plurality of wings unitary with and extending forwardly from the projectile seating base and positioned circumferentially around the forward projectile seating surface, the forward projectile seating surface and wings defining a cup for receiving a projectile, the wings openable outwardly for releasing the projectile after the sabot and projectile leave the firearm barrel; the pusher plate comprising; a disc portion positionable at the rear surface of the projectile seating base, the disc portion having a periphery; at least one projection extending from the disc portion axially forward, the at least one projection displaced from the periphery of the disc, the disc portion abutting against the rear surface of the sabot and the projection extendable into the projectile seating base of the sabot, wherein the pusher plate is formed of a material more rigid than polymer of the sabot and is configured to not obturate the firearm barrel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A projectile assembly comprising:
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a casing with a rearward primer end and a forward end; a propellant in the casing adjacent the primer end; a primer in the primer end of the casing for igniting the propellant charge; wadding positioned adjacent the propellant; a sabot formed of a polymer in the casing forward of the wadding, the sabot comprising a deformable cylindrical portion unitary with a plurality of forwardly extending wings, the sabot having a rear end with a rear surface, and a central longitudinal axis, a pusher plate comprising a non-obturating rigid disc and a central projection extending from the disc forwardly into the deformable cylindrical portion at the rear end of the sabot, the pusher plate formed of a material more rigid than the polymer of the sabot, a portion of the pusher plate engaging the sabot; and a projectile positioned in the sabot seated on the projectile seating base. - View Dependent Claims (11, 12, 13, 14)
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15. A projectile assembly for conveying a projectile through a firearm barrel, the projectile assembly comprising:
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a sabot having a deformable cylindrical polymer base portion positioned rearwardly of the projectile, the cylindrical polymer base portion having a forward end for facing the projectile, a rearward end for facing toward propellant, a central axis and a length; a pusher plate in engagement with the rearward end of the cylindrical polymer base portion, the pusher plate having a disc portion with a periphery and a forwardly extending projection with a tip end extending from the disc portion along the central axis of the cylindrical polymer base portion into the cylindrical polymer base, the pusher plate formed of a material more rigid than the cylindrical polymer base portion whereby upon firing a propellent rearwardly of the projectile assembly in the firearm barrel, the cylindrical polymer base portion is compressed axially and deforms, and the pusher plate and forwardly extending projection facilitate uniform axial deformation of the cylindrical polymer base portion upon the compression due to the propellant ignition. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification