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US 12,313,388 B2Granted
Biodegradable shotshell components
AssigneeFederal Cartridge Company
InventorsAlex R. Schmieg, Robert A. Strange, Anthony C. Stockey, Steven P. Schommer, Adam J. Moser
Life of this patent
Estimating the term…
Abstract
Devices and methods for shotshell cartridges, particularly shotshell cartridges with biodegradable components. One or more of the casing, shot wad, spacer, and powder wad may be formed of biodegradable materials. A biodegradable shot wad is manufactured of cellulosic fibers and wax to provide obturation and gas seal properties at high pressures with high reliability.
Claims20
A shotgun shell cartridge comprising:
- a casing comprising a primer;
- a shot wad positioned in the casing;
- a biodegradable fiber powder wad inside the casing and rearward of the shot wad, comprising:
- at least 40% cellulosic fiber by weight,
- a wax distributed through the cellulosic fiber,
- a rearward-facing axial end comprising, comprising:
- an annular depression, and
- a ring located radially outward from the annular depression;
- and
- a propellant housed in the casing, rearward of the biodegradable fiber powder wad.
7 more elements
A shotgun shell cartridge comprising:
- a casing comprising a primer;
- a shot wad positioned in the casing;
- a biodegradable fiber powder wad inside the casing and rearward of the shot wad, comprising:
- a cellulosic fiber,
- a wax distributed through the cellulosic fiber,
- a rearward-facing axial end comprising,
- an annular depression, and
- a ring located radially outward from the annular depression;
- and
- a propellant housed in the casing, rearward of the biodegradable fiber powder wad.
7 more elements
A method of manufacturing a wad for shotshell, comprising:
- bonding cellulosic fibers to form a board, the bonding comprising:
- depositing a wax onto the cellulosic fibers;
- and
- forming the board from the cellulosic fibers and the wax, and wax;
- cutting a cylindrical puck from the board;
- cooling the cylindrical puck;
- and
- pressing at least one press against at least one axial end of the cylindrical puck to form an annular depression at the at least one axial end, whereby a ring is formed radially outwardly from the annular depression.
5 more elements
Dependencies are inferred from the claim text.