US 12,487,064 B2
Lightweight end cap
Nathan William Rowe, Crewe (GB); Joshua Matthew Stubbs, Crewe (GB); Paul Heaton, Crewe (GB); and Richard James Duncombe, Farnborough (GB)
Assigned to BAE SYSTEMS PLC, London (GB)
Appl. No. 18/558,977
Filed by BAE SYSTEMS plc, London (GB)
PCT Filed Apr. 19, 2022, PCT No. PCT/GB2022/050967
§ 371(c)(1), (2) Date Nov. 3, 2023,
PCT Pub. No. WO2022/234245, PCT Pub. Date Nov. 10, 2022.
Claims priority of application No. 21275054 (EP), filed on May 5, 2021; and application No. 2106391.2 (GB), filed on May 5, 2021.
Prior Publication US 2024/0230291 A1, Jul. 11, 2024
Int. Cl. F42B 5/285 (2006.01); F42B 5/307 (2006.01); F42C 19/08 (2006.01); B33Y 80/00 (2015.01)
CPC F42B 5/285 (2013.01) [F42B 5/307 (2013.01); F42C 19/083 (2013.01); B33Y 80/00 (2014.12)] 20 Claims
OG exemplary drawing
 
1. An ammunition round, comprising:
a cellular structure end cap, said cellular structure end cap comprising a porous three-dimensional (3D) spatial structure in the shape of said cellular structure end cap, wherein said porous 3D spatial structure comprises a surface skin, wherein the porous 3D spatial structure is a honeycomb, lattice, or foamed structure, and wherein the porous 3D spatial structure has a void fraction in the range of 30%-80%;
a case, said case and cellular structure end cap forming a cartridge case;
a primer cap;
propellant; and
a projectile located in said cartridge case.