Base insert for polymer ammunition cartridges
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United States of America Patent
Stats
-
Mar 21, 2017
Grant Date -
Dec 25, 2014
app pub date -
Sep 10, 2014
filing date -
Jul 30, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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