Shotgun shell wad/shot cup retarding device
AssigneeImpromark, Inc.
InventorsMichael See, Michael Rock, Ronald N. Walker
Life of this patent
Estimating the term…
Abstract
A shot cup retardation device including circumferentially spaced and radially protruding ridges, pins, studs, or set screws; or an applied grit around an inner circumference of a barrel; or a plurality of continuous circumferential ribs arranged axially spaced apart within the barrel, all for retarding the velocity of a shot cup so as to inhibit interference between shot and cup downstream of the shotgun muzzle. Additionally, the invention provides that a shot cup retardation device and a downstream choke or pattern conditioner can be utilized in combination to produce a fine tuned and selective pattern without the random influence of shot cup and shot interference.
Claims19
A shot wad/shot cup retardation device for retarding the progression of a plastic shot wad/shot cup carrying shot pellets within a shotgun barrel that has a given diameter, comprising:
- a cylindrical zone having a cylindrical wall defining diameter essentially the same as said diameter of said shotgun barrel;
- a plurality of radial projections integrally formed on said wall, spaced angularly apart and projecting inwardly from said diameter;
- said projections having a length along a longitudinal axis of said barrel and a width along an annular direction around said barrel, wherein said length and width do not vary greatly in dimension from one another.
A shotgun and shell combination, comprising:
- a shotgun barrel having a given diameter and a length terminating in an open muzzle and having a cup retardation zone upstream of the muzzle, the retardation zone having integrally formed radially inwardly extending protuberances;
- said protuberances having a length along a longitudinal axis of said barrel and a width along an annular direction around said barrel, wherein said length and width do not vary greatly in dimension from one another;
- a plastic cup containing shot and adapted to carry the shot substantially the length of the barrel until reaching the cup retardation zone wherein said protuberances exert a frictional force on the cup to separate the cup and the shot held therein.
A shot wad/shot cup retardation device for retarding the progression of a plastic shot wad/shot cup within a shotgun barrel having a given diameter, comprising:
- a cylindrical zone having a diameter essentially the same as the diameter of said shotgun barrel;
- a plurality of radial projections spaced angularly apart and projecting from said diameter into said shotgun barrel;
- said projections having a length along a longitudinal axis of said barrel and a width along an annular direction around said barrel, wherein said projections have a rectangular periphery defining said length and width and have a side facing an approaching cup which presents an abrupt dimensional decrease from said diameter of said shotgun barrel.
Dependencies are inferred from the claim text.