# US 11,906,276 B2 · Wad for a shotgun cartridge > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,276 B2 - Document ID: US11906276B2 - Status: Granted - Kind: B2 - Application number: 17/636,001 - Filed: 2020-09-02 - Published: 2022-09-08 - Granted: 2024-02-20 - Earliest claimed: 2019-09-05 - Applicants: Graham Richard McLeod - Inventors: Graham Richard McLeod - Web page: https://patentgrep.com/patent/US11906276B2 ## CPC - F42B 7/08: Wads, {i.e. projectile or shot carrying devices,} therefor - F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D) ## Abstract A wad (4, 9) for a shotgun cartridge (20) is described. The wad (4, 9) comprises a cup-shaped member (4) and a separation member (9) located inside the cup-shaped member (4) adjacent a base of the cup-shaped member (4). The cup-shaped member (4) and the separation member (9) each comprise at least one biodegradable fibrous material. ## Claims ### Claim 1 A wad for a shotgun cartridge, the wad comprising a cup-shaped member having an open end and closed end, and wherein the cup-shaped member comprises a first biodegradable fibrous material, wherein the cup-shaped member comprises at least one of: (i) a fabric material laminated onto a pulp material; and (ii) a fabric material embedded into a pulp material. ### Claim 2 (depends on 1) A wad according to claim 1, wherein the first biodegradable fibrous material is a natural fibrous material. ### Claim 3 (depends on 1) A wad according to claim 1, wherein the cup-shaped member is formed at least in part from a pulp material. ### Claim 4 (depends on 1) A wad according to claim 1, further comprising a separation member located inside the cup-shaped member adjacent the closed end of the cup-shaped member, and wherein the separation member comprises a second biodegradable fibrous material. ### Claim 5 (depends on 4) A wad according to claim 4, wherein the second biodegradable fibrous material is a natural fibrous material. ### Claim 6 (depends on 4) A wad according to claim 4, wherein the separation member is formed at least in part from at least one of a pulp material and a felt material. ### Claim 7 (depends on 4) A wad according to claim 4, wherein the second biodegradable fibrous material is a compressed biodegradable fibrous material. ### Claim 8 (depends on 1) A wad according to claim 1, wherein the cup-shaped member is formed from a tubular member that is crimped at one end to form the closed end. ### Claim 9 (depends on 1) A wad according to claim 1, wherein side walls of the cup-shaped member have at least one slit extending from adjacent the open end to at least part way along the side wall towards the closed end. ### Claim 10 (depends on 9) A wad according to claim 9, wherein opposite sides of the slit are spaced apart from each other so that the slit forms a slot. ### Claim 11 (depends on 9) A wad according to claim 9, wherein the end of the at least one slit closest to the closed end is spaced from the closed end. ### Claim 12 (depends on 1) A wad according to claim 1, wherein the cup-shaped member comprises a friction reducing outer surface. ### Claim 13 A shotgun cartridge comprising an outer casing, the casing containing a primer located in a base of the casing, an explosive powder adjacent the base of the casing and the primer, a wad comprising a cup-shaped member located on the opposite side of the powder from the base and a projectile located within the cup-shaped member; and wherein the cup-shaped member comprises a first biodegradable fibrous material, wherein the cup-shaped member comprises at least one of: (i) a fabric material laminated onto a pulp material; and (ii) a fabric material embedded into a pulp material. ### Claim 14 (depends on 13) A shotgun cartridge according to claim 13, wherein the wad further comprises a separation member located within the cup-shaped member, and the separation member comprises a second biodegradable fibrous material. ### Claim 15 (depends on 14) A shotgun cartridge according to claim 14, wherein the separation member is located between a closed end of the cup-shaped member and the projectile. ### Claim 16 (depends on 13) A shotgun cartridge according to claim 13, wherein the cup-shaped member comprises a tube having a crimped closure at one end. ### Claim 17 (depends on 13) A shotgun cartridge according to claim 13, wherein the wad further comprises a disc-shaped member located between the explosive powder and the cup-shaped member. ### Claim 18 (depends on 13) A shotgun cartridge according to claim 13, wherein the cup-shaped member comprises at least one slit extending from adjacent an open end of the cup-shaped member at least part way along the side wall towards the closed end.