초록 ▼

A caseless propellant charge structure and sensitizer structure for safe ignition and cleaner gas generation. The sensitizer structure is comprised of a sensitizer material which is encapsulated in a protective binder material. The protective binder layer is broken during desired ignition in the com

A caseless propellant charge structure and sensitizer structure for safe ignition and cleaner gas generation. The sensitizer structure is comprised of a sensitizer material which is encapsulated in a protective binder material. The protective binder layer is broken during desired ignition in the combustion chamber. Meanwhile the propellant structure comprises an oxidizer rich layer which also contains fuel and a propellant layer. The oxidizer rich layer is adjacent the sensitizer structure in the strip assembly. The oxidizer rich layer allows ignition while foregoing the need for high concentration of oxidizer throughout the propellant structure thus reducing the mass of solids generated from the oxidizer combustion.

대표청구항 ▼

[ What is claimed is:] [1.] A propellant charge structure for providing energy for operating a fastener driving tool, comprising:a first layer of ignitable first composition means comprising a first fuel material consisting essentially of nitrocellulose;a second layer of oxidizer rich second composi

[ What is claimed is:] [1.] A propellant charge structure for providing energy for operating a fastener driving tool, comprising:a first layer of ignitable first composition means comprising a first fuel material consisting essentially of nitrocellulose;a second layer of oxidizer rich second composition means, adjacent said first layer, comprising an oxidizer material and a second fuel material;and a third layer of sensitizer third composition means, in contact with said second layer, comprising a sensitizer material encapsulated within a binder material;wherein an impacting of said third layer causes said sensitizer material of said third layer to frictionally engage said second layer and ignite said fuel material within said first and second layers, thus generating energy.