Two-piece insert and/or flash tube for polymer ammunition cartridges
US12247819B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2021 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Dec 14, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42C19/083
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A high strength polymer-based cartridge casing can include an upper polymer component, molded from a polymer. The upper component has a first end having a mouth, at least a wall between the first end and a second end of the upper component opposite the first end, an overlap portion extending from the wall near the second end. An upper insert is included and has a first end and an opposing second end, a molded area disposed approximate the first end, that engages the overlap portion to join the upper polymer component and the upper insert, and an insert engagement area disposed approximate to the second end. Further, a lower insert has a front end and a back end, an upper insert engagement area engaging with the insert engagement area, a rim and groove disposed around an outside of the lower insert, and a primer pocket disposed inside the back end. Lastly, a flash hole is inside the lower insert and communicates between the primer pocket and upper polymer component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.