Ammunition and explosives – Igniting devices and systems – Propellant ignitors
Reexamination Certificate
2005-07-19
2005-07-19
Johnson, Stephen M. (Department: 3641)
Ammunition and explosives
Igniting devices and systems
Propellant ignitors
C102S380000, C280S741000, C149S109200
Reexamination Certificate
active
06918340
ABSTRACT:
This invention relates to a gas generator having two or more compartments, each with a separate initiator, with one compartment discharging before another, i.e., the compartments discharge sequentially. Each compartment has the same propellants, but the propellants have different geometries in each compartment, which results in different rates of gas evolution from each compartment. The gas generator has a rapid initial inflation, followed by a more gradual inflation rate in the subsequent stages, improving safety to occupants. One propellant used for the gas generator comprises (1) ammonium nitrate as the oxidizer, (2) a fuel such as CL-20. and (3) a binder such as polycaprolactone. A second propellant comprises by weight approximately 70-95% energetic nitrate fuel, 5-25% energetic polymer binder and 0.1-5% flash suppressant. No hot metal particles (e.g., CuO) are generated in the new systems.
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Johnson Stephen M.
McDermott Will & Emery LLP
Textron Systems Corporation
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