Base insert for polymer ammunition cartridges
US9599443B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2014 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Sep 10, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7772
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An insert for a high strength polymer-based cartridge casing can include an outside, an inside formed within the insert, and a back end disposed at a rear of the cartridge casing. The back end includes a rim and groove disposed around the outside of the insert and a primer pocket disposed inside the back end. Also included is a front end, opposite the back end, having an overmolded area disposed around the outside of the insert above the primer pocket and a basin, having a depth, formed inside the overmolded area. A flash hole can be included inside the insert and communicating between the primer pocket and the basin. The flash hole has a perimeter and a ring disposed around the perimeter of the flash hole, including a height starting at a bottom of the basin, disposed toward the front end, and less than the depth of the basin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.