PYROTECHNIC EGRESS SYSTEM

• US 20110167994A1
• Filed: 09/30/2008
• Published: 07/14/2011
• Est. Priority Date: 09/30/2008
• Status: Abandoned Application

• Current Assignee: Sikorsky Aircraft Corporation (Martin Marietta Corporation)
• Original Assignee: Sikorsky Aircraft Corporation (Martin Marietta Corporation)
• Inventors: Goldschmidt, David J., Au-Yeung, Honmartin K., Stobiecki, Anthony Z.
• Application Number:
  US13/063,980
• Publication Number:
  US 20110167994A1
• Time in Patent Office: Days
• US Class Current: 89/1.14
• CPC Class Codes: B64C 1/1492 Structure and mounting of the transparent elements in the window or windscreen
• CPC Class Codes: B64C 1/32 Severable or jettisonable parts of fuselage facilitating emergency escape
• CPC Class Codes: F42B 1/00 Explosive charges characterised by form or shape but not dependent on shape of container
• CPC Class Codes: F42D 3/00 Particular applications of blasting techniques explosive welding B23K20/08; explosive bolts or actuators F42B3/006; explosive valves F16K13/06; cutting devices actuated by explosion B23D15/145; pyrotechnical actuators F15B15/19; switching devices actuated by explosion H01H39/00

Abstract

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

Claims

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.