Shotshell having wad with enhanced fin deployment
AssigneeVista Outdoor Operations LLC
InventorsAdam J. Moser, Erik K. Carlson, Matthew S. Schroeder, Gary Hendrickson, Frank Gerzina
Life of this patent
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Abstract
A shotgun shell has a polymer wad with a forward shot cup portion and a rearward propellant cup, the wad in a casing, shot in the shot cup, propellant in the propellant cup, and a primer in a head of the casing. The propellant cup having a plurality of fins extending rearwardly that open to a deployed position upon firing and the shot cup having a plurality of circumferentially spaced axially aligned linear slit segments that permit air to circulate and permit expansion of the shot cup.
Claims14
A shotshell cartridge comprising:
- a casing comprising a head portion and a primer;
- a polymer wad positioned in the casing, the wad comprising:
- a forward shot cup portion comprising a forward cup interior,
- a rearward propellant cup portion comprising a rearward cup interior, the propellant cup portion comprising an interior surface, a base portion, and a tubular portion, the tubular portion comprising a plurality of circumferentially arranged fins, the plurality of circumferentially arranged fins each comprising:
- a hinge region, and
- a cam surface,
- the plurality of circumferentially arranged fins extend forwardly from the hinge region defining a prefiring positon, each fin rotatable outwardly and rearwardly at the hinge region upon the wad exiting a barrel when fired and having a deployed position, the fins configured to retain the deployed position after firing, and
- a disk, the disk configured to engage cam surfaces on the plurality of fins when the disk is moved axially to provide an outward fin opening force when the cartridge is fired and provides a force to retain the deployed position;
- propellant positioned in the propellant cup;
- and
- shot positioned in the shot cup portion.
A shotshell cartridge comprising a wad with a forward shot cup portion comprising a disk and rearward propellant cup comprising a propellant, the rearward propellant cup portion comprising a hinge region for a plurality of deployable fins extending from the wad, the plurality of deployable fins having a first undeployed position and a second deployed position, each of the plurality of deployable fins movable and retainable at the second deployed position after they are rotated outwardly by force of the disk being driven rearward by the inertia of the shot to engage cam surfaces of the plurality of deployable fins.
Dependencies are inferred from the claim text.