Jun 30, 2026

US12669315 - Modular exploding foil initiator assembly

An exploding foil initiator (EFI) assembly includes: a housing assembly, having a base, one or more elongated supports spaced about a circumference of the base extending axially away from the base, and protuberances extending radially-inwardly toward a central axis; a spring configured to compress a leadframe, an insulator, a pellet sleeve, and an explosive pellet; and a retainer cap with a surface that abuts the spring that releasably engages the protuberances and compresses the spring while engaged with the protuberances.

Assignee: Reynolds Systems, Inc.
Inventors: Daniel Swenston, Brent Chicoine
Filing date: 2025-02-12

explodinginitiatorassemblymilitary

The patent describes a modular exploding foil initiator (EFI) assembly designed to enhance the efficiency of explosive activation through a structured housing and a compressible spring mechanism. This assembly includes a retainer cap that engages with protuberances to maintain compression, directing force effectively towards the explosive components.

Claim 1

1 . An exploding foil initiator (EFI) assembly, comprising: a housing assembly, having a base, elongated supports spaced about a circumference of the base extending axially away from the base, and protuberances extending away from a distal end of the elongated supports; an elastic member configured to compress a leadframe, an insulator, a pellet sleeve, and an explosive pellet; and a retainer cap with a surface that abuts the elastic member spring that releasably engages the protuberances and the retainer cap compresses the elastic member to direct an axial force received from the retainer cap towards the base while engaged with the protuberances. a housing assembly, having a base, elongated supports spaced about a circumference of the base extending axially away from the base, and protuberances extending away from a distal end of the elongated supports; an elastic member configured to compress a leadframe, an insulator, a pellet sleeve, and an explosive pellet; and a retainer cap with a surface that abuts the elastic member spring that releasably engages the protuberances and the retainer cap compresses the elastic member to direct an axial force received from the retainer cap towards the base while engaged with the protuberances.

Google Patents

https://patents.google.com/patent/US12669315

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12669315