# US 2020/0400415 A1 · Primer Housing for Firearms and Other Munitions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0400415 A1 - Document ID: US20200400415A1 - Status: Published application - Kind: A1 - Application number: 15/931,340 - Filed: 2020-05-13 - Published: 2020-12-24 - Earliest claimed: 2019-05-13 - Assignees: Spectre Enterprises, Inc. - Applicants: Spectre Enterprises, Inc. - Inventors: Timothy Mohler; Danlei Yates - Web page: https://patentgrep.com/patent/US20200400415A1 ## CPC - F42C 19/083: {characterised by the shape and configuration of the base element embedded in the cartridge bottom, e.g. the housing for the squib or percussion cap} - F42C 19/0807: {characterised by the particular configuration of the transmission channels from the priming energy source to the charge to be ignited, e.g. multiple channels, nozzles, diaphragms or filters} - F42C: AMMUNITION FUZES (blasting cartridge initiators F42B3/10; chemical aspects C06C); ARMING OR SAFETY MEANS THEREFOR (filling fuzes F42B33/02; fitting or extracting primers in or from fuzes F42B33/04; containers for fuzes F42B39/30) ## Abstract A primer structure is provided for holding a deposited ignitable material, and for holding the ignitable material within a firearm cartridge or within another munition. The primer includes a disk and a retaining ring. Ignitable material is deposited on a surface of the disk. The retaining ring is positioned in front of the disk. The retaining ring includes angled passageways for reaction products to travel from the ignitable material to the propellant. The forwardmost surface of the retaining ring, as well as the angle of the passageways, dissipate pressure that would otherwise be borne by the disk. Both the disk and retaining ring include angled or stepped surfaces to resist movement under pressure. ## Claims ### Claim 1 A housing for a primer, comprising: a disk having a first face, a second face, and an edge defined between the first face and second face, the second face having a larger cross sectional area than the first face, the edge having a pressure-resisting configuration; and a retention piece having an open end, a closed end, and a side wall extending therebetween, the open end being dimensioned and configured to substantially match the second face of the disk, the closed end having a larger cross sectional area than the open end, a portion of the side wall having a pressure-resisting configuration, the retention piece defining a recess within the open end, the retention piece further defining a central axis extending between the open end and the closed end, the retention piece defining a plurality of channels extending from the recess to the closed end, the channels being angled from parallel to the central axis. ### Claim 2 (depends on 1) The housing according to claim 1, wherein the second face of the disk defines a recess therein. ### Claim 3 (depends on 1) The housing according to claim 1, wherein the plurality of channels are distributed substantially uniformly around the retention piece. ### Claim 4 A primer, comprising: a disk having a first face, a second face, and an edge defined between the first face and second face, the second face having a larger cross sectional area than the first face, the edge having a pressure-resisting configuration, the second face of the disk having an ignitable material thereon; and a retention piece having an open end, a closed end, and a side wall extending therebetween, the open end being dimensioned and configured to substantially match the second face of the disk, the closed end having a larger cross sectional area than the open end, a portion of the side wall having a pressure-resisting configuration, the retention piece defining a recess within the open end, the retention piece further defining a central axis extending between the open end and the closed end, the retention piece defining a plurality of channels extending from the recess to the closed end, the channels being angled from parallel to the central axis. ### Claim 5 (depends on 4) The primer according to claim 4, wherein the second face of the disk defines a recess therein, the ignitable material being located within the recess. ### Claim 6 (depends on 4) The primer according to claim 4, wherein the plurality of channels are distributed substantially uniformly around the retention piece. ### Claim 7 A firearm cartridge, comprising: a casing having a sidewall, a front end, and a back end, the back end defining a primer pocket therein, the primer pocket having a side surface; a primer, comprising: a disk having a first face, a second face, and an edge defined between the first face and second face, the second face having a larger cross sectional area than the first face, the edge having a pressure-resisting configuration, the second face of the disk having an ignitable material thereon; a retention piece having an open end, a closed end, and a side wall extending therebetween, the open end being dimensioned and configured to substantially match the second face of the disk, the closed end having a larger cross sectional area than the open end, a portion of the side wall having a pressure-resisting configuration, the retention piece defining a recess within the open end, the retention piece further defining a central axis extending between the open end and the closed end, the retention piece defining a plurality of channels extending from the recess to the closed end, the channels being angled from parallel to the central axis; and the side surface of the primer pocket having a shape that substantially matches the pressure-resisting configuration of the disk and the pressure-resisting configuration of the retention piece; whereby movement of the retention ring and disk caused by pressure inside the casing is resisted by interaction of the side surface of the primer pocket with the pressure-resisting surfaces of the disk and retention piece. ### Claim 8 (depends on 7) The cartridge according to claim 7, wherein the second face of the disk defines a recess therein, the ignitable material being located within the recess. ### Claim 9 (depends on 7) The cartridge according to claim 7, wherein the plurality of channels are distributed substantially uniformly around the retention piece.