# US 10,871,354 B2 · Vibration resistant initiator assembly having exploding foil initiator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,871,354 B2 - Document ID: US10871354B2 - Status: Granted - Kind: B2 - Application number: 16/705,715 - Filed: 2019-12-06 - Published: 2020-04-09 - Granted: 2020-12-22 - Earliest claimed: 2017-05-22 - Assignees: Reynolds Systems, Inc. - Applicants: Reynolds Systems, Inc. - Inventors: Michael A. Amendola; Richard K. Reynolds; Christopher J. Nance - Web page: https://patentgrep.com/patent/US10871354B2 ## CPC - F42B 3/10: Initiators therefor (percussion fuzes F42C7/00; percussion caps F42C19/10; electric primers F42C19/12) - F42B 3/12: Bridge initiators {(F42B3/103, F42B3/11, F42B3/195 take precedence; electric ignitors in propellant charges F42C19/12)} - F42B 3/128: {characterised by the composition of the pyrotechnic material} - F42B 3/195: Manufacture - F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D) ## Abstract An initiator assembly that includes a housing assembly, an exploding foil initiator, an input charge and an output charge. The housing assembly defines a first cavity, a second cavity, and a bulkhead member between the first and second cavities. The exploding foil initiator is received in the housing assembly and includes a bridge, a flyer and a barrel. The flyer overlies the bridge and is disposed between the barrel and the bridge. The barrel defines a barrel aperture. The input charge, which is formed of a secondary explosive, is received in the housing assembly and is disposed in-line with the barrel aperture. The output charge assembly is received in the housing assembly and is formed of a secondary explosive. Energy released from detonation of the input charge in response to operation of the exploding foil initiator penetrates the bulkhead and initiates detonation of the output charge. ## Claims ### Claim 1 An initiator assembly comprising: a housing assembly that defines a first cavity, a second cavity, and a structural wall that separates and provides a hermetic seal between adjacent ends of the first and second cavities; an exploding foil initiator received in the first cavity, the exploding foil initiator having a bridge, a flyer and a barrel, the flyer overlying the bridge and being disposed between the barrel and the bridge, the barrel defining a barrel aperture; an input charge received in the first cavity and disposed in-line with the barrel aperture, the input charge being formed of a secondary explosive; an output charge disposed in the second cavity and formed of a secondary explosive; wherein the input charge is configured to detonate in response to receipt of kinetic energy of the flyer during operation of the exploding foil initiator, and wherein energy released from detonation of the input charge penetrates the structural wall and initiates detonation of the output charge. ### Claim 2 (depends on 1) The initiator assembly of claim 1, wherein the structural wall comprises a seal assembly and wherein the housing assembly includes a housing component into which the seal assembly is received, the seal assembly being disposed along the longitudinal axis of the barrel aperture between the input charge and the output charge, the seal assembly being sealingly engaged to the housing component. ### Claim 3 (depends on 1) The initiator assembly of claim 1, wherein the housing assembly includes a first housing structure, a second housing structure and a third housing structure, wherein the first and second housing structures are fixedly coupled to one another to form the first cavity, and wherein the second and third housing structures are fixedly coupled to one another to form the second cavity. ### Claim 4 (depends on 1) The initiator assembly of claim 1, further comprising a sleeve disposed about the input charge. ### Claim 5 (depends on 1) The initiator assembly of claim 1, wherein the output charge is formed as a single pellet that is formed of a compacted powdered material. ### Claim 6 (depends on 1) The initiator assembly of claim 1, wherein the housing assembly comprises a housing member and wherein the housing member defines the structural wall. ### Claim 7 (depends on 6) The initiator assembly of claim 6, wherein the housing assembly comprises a lid member that is fixedly coupled to the housing member to close the second cavity. ### Claim 8 (depends on 7) The initiator assembly of claim 7, wherein the lid member is bonded to the housing member. ### Claim 9 (depends on 6) The initiator assembly of claim 6, wherein the housing assembly includes a header assembly that is fixedly coupled to the housing member to close the first cavity. ### Claim 10 (depends on 9) The initiator assembly of claim 9, wherein the header assembly comprises a header body, a plurality of terminals received through the header body, and a plurality of seals that are sealingly engaged to the header body and an associated one of the terminals. ### Claim 11 (depends on 10) The initiator assembly of claim 10, wherein one of the housing member and the header body defines a shoulder and wherein the other one of the housing member and the header body is abutted to the shoulder. ### Claim 12 (depends on 1) The initiator assembly of claim 1, wherein the housing assembly comprises a housing member and wherein the structural wall is slidably disposed within the housing member. ### Claim 13 (depends on 1) The initiator assembly of claim 1, wherein the housing assembly comprises a header assembly, a housing member and a lid member, wherein the header assembly is coupled to the housing member to close the first cavity, wherein the housing member is coupled to the lid member to close the second cavity, and wherein the structural wall is unitarily and integrally formed with the housing member.