Pyrotechnic egress system

Abstract

A pyrotechnic egress system includes an air encapsulation member which at least partially surrounds a charge holder which contains an explosive cord.

1 . A pyrotechnic egress system for a structure comprising:
 an explosive cord;   a charge holder which at least partially surrounds said explosive chord; and   an air encapsulation member which at least partially surrounds said charge holder and abuts the structure.   
     
     
         2 . The system as recited in  claim 1 , wherein said charge holder is manufactured of a silicone rubber. 
     
     
         3 . The system as recited in  claim 1 , wherein said charge holder is “U” shaped in cross-section. 
     
     
         4 . The system as recited in  claim 1 , wherein said air encapsulation member is manufactured of closed-cell foam. 
     
     
         5 . The system as recited in  claim 1 , wherein said air encapsulation member is manufactured of Styrofoam. 
     
     
         6 . The system as recited in  claim 1 , wherein said air encapsulation member is rectilinear shaped in cross-section. 
     
     
         7 . An explosively severable structure comprising:
 a structure;   an explosive cord bonded to said structure;   a charge holder which at least partially surrounds said explosive chord; and
 an air encapsulation member which at least partially surrounds said charge holder and abuts said structure. 
   
     
     
         8 . The structure as recited in  claim 7 , wherein said structure is transparent. 
     
     
         9 . The structure as recited in  claim 7 , wherein said structure includes a cockpit window. 
     
     
         10 . The structure as recited in  claim 7 , wherein said structure includes a cabin window. 
     
     
         11 . The structure as recited in  claim 7 , wherein said structure includes an escape panel. 
     
     
         12 . The structure as recited in  claim 7 , wherein said charge holder is “U” shaped in cross-section, an open side of said “U” shape directed toward said structure. 
     
     
         13 . The structure as recited in  claim 7 , wherein said air encapsulation member is manufactured of a closed-cell foam. 
     
     
         14 . The structure as recited in  claim 13 , further comprising a shield which at least partially surrounds said air encapsulation member, said shield mounted to said structure. 
     
     
         15 . A method of reducing peak pressure and impulse intensity of a pyrotechnic egress system comprising:
 at least partially surrounding an explosive cord in contact with a structure with an air encapsulation member, the air encapsulation member in contact with the structure.   
     
     
         16 . A method as recited in  claim 15 , further comprising at least partially surrounding the explosive cord with a closed-cell foam.