Base insert for polymer ammunition cartridges
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F42B-005/30
F42B-005/307
F42B-005/313
F42B-003/24
F42B-033/00
B29C-065/72
B29C-069/00
F42C-019/10
B29K-096/00
B29L-031/00
출원번호
US-0482843
(2014-09-10)
등록번호
US-9599443
(2017-03-21)
발명자
/ 주소
Padgett, Charles
Wiley, Sy
출원인 / 주소
PCP TACTICAL, LLC
대리인 / 주소
Troutman Sanders LLP
인용정보
피인용 횟수 :
9인용 특허 :
105
초록▼
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
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.
대표청구항▼
1. A high strength polymer-based cartridge casing comprising: a cartridge body, molded from a polymer, comprising: a first end having a mouth; anda second end opposite the first end;an outer sheath disposed proximate the second end;a lower bowl disposed proximate the outer sheath and having a hole t
1. A high strength polymer-based cartridge casing comprising: a cartridge body, molded from a polymer, comprising: a first end having a mouth; anda second end opposite the first end;an outer sheath disposed proximate the second end;a lower bowl disposed proximate the outer sheath and having a hole therethrough;an insert, formed from at least one of a metal and metal alloy, comprising a front end and a back end, and further comprising: a rim disposed at the back end;a primer pocket disposed at and open along a portion of the back end and continuing partially toward the front end;a flash hole disposed forward of the primer pocket, in fluid communication with the primer pocket, and continuing partially toward the front end; andan overmolded area formed at the front end, opposite the rim, comprising: a basin formed on an inside of the overmolded area and disposed above the primer pocket; anda ring formed, at a bottom of the basin, on an inside of the overmolded area, and surrounding the flash hole, comprising a ring wall;wherein the ring prevents polymer from the lower bowl from flowing into the flash hole by stopping the polymer at the ring wall;wherein the second end of the cartridge body engages with the front end of the insert;wherein the outer sheath is disposed to an outside of the overmolded area;wherein the lower bowl is disposed inside of the overmolded area and in contact with the basin; andwherein the hole in the lower bowl is disposed around the ring wall. 2. The high strength polymer-based cartridge casing of claim 1, wherein during a powder ignition in a firearm, the lower bowl presses against the basin and the outer sheath contacts the firearm to create a compression effect against the overmolded area. 3. The high strength polymer-based cartridge casing of claim 1, wherein the insert further comprises: a ridge formed on the overmolded area; anda key formed on the ridge;wherein both the ridge and the key engage the outer sheath, andwherein the key comprises at least one of a flat portion, a raised portion, or dimples. 4. A method of making a high strength polymer-based cartridge casing comprising the steps of: forming an insert from at least one of a metal and metal alloy, comprising a front end and a back end, and further forming: a rim disposed at the back end;a primer pocket disposed at and open along a portion of the back end and continuing partially toward the front end;a flash hole disposed forward of the primer pocket, in fluid communication with the primer pocket, and continuing partially toward the front end; andan overmolded area formed at the front end, opposite the rim, comprising; a basin formed on an inside of the overmolded area and disposed above the primer pocket; anda ring formed, at a bottom of the basin, on an inside of the overmolded area, and surrounding the flash hole, comprising a ring wall;molding a cartridge body using a polymer comprising the steps of: molding the polymer to form an outer sheath disposed proximate the second end and to an outside of the overmolded area;molding a lower bowl disposed proximate the outer sheath, inside of the overmolded area, in contact with the basin, and having a hole therethrough; andstopping the polymer at the ring wall. 5. The method of making a high strength polymer-based cartridge casing of claim 4, wherein forming the insert further comprises the steps of: forming a ridge on the overmolded area; andforming a key on the ridge with at least one of a flat portion, a raised portion, or dimples;wherein both the ridge and the key engage the outer sheath.
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