US12487064 - Lightweight end cap

The patent describes a lightweight end cap for ammunition that features a porous 3D structure, enhancing production efficiency and performance. This end cap can be designed in various forms, such as honeycomb or lattice, with a specific void fraction to optimize its functionality within the cartridge.

Claim 1

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. 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.

Google Patents

https://patents.google.com/patent/US12487064

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12487064