Detonating cord stress concentrators

Patent metadata

Field	Value
Publication number	US-11319260-B2
Application number	US-201916674747-A
Country	US
Kind code	B2
Filing date	Nov 5, 2019
Priority date	Nov 5, 2019
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

A pyrotechnic egress system for a structure may comprise an explosive cord, an outer sheath disposed about the explosive cord, and a stress concentrator coupled to the outer sheath. The stress concentrator may comprise a triangular cross section. The stress concentrator may include a standoff structure.

First claim

What is claimed is:

1. A pyrotechnic system for a structure, comprising:
an explosive cord;
an outer sheath disposed about the explosive cord;
a stress concentrator comprising a protrusion which extends outwardly from an outermost surface of the outer sheath; and
a standoff structure, wherein a distal end of said standoff structure is spaced further from said outer sheath than said stress concentrator,
wherein the stress concentrator is coupled to a surface of the outer sheath via bonding.

2. The pyrotechnic system of claim 1 , wherein the stress concentrator comprises a triangular cross section.

3. The pyrotechnic system of claim 1 , wherein the stress concentrator defines a cavity therewithin.

4. The pyrotechnic system of claim 1 , wherein the stress concentrator is continuous along the outermost surface of the outer sheath.

5. The pyrotechnic system of claim 1 , wherein the stress concentrator is segmented.

6. The pyrotechnic system of claim 1 , wherein the stress concentrator is integral to the outer sheath.

7. A pyrotechnic system for a structure, comprising:
an explosive cord;
an outer sheath disposed about the explosive cord; and
a stress concentrator comprising a protrusion which extends outwardly from an outermost surface of the outer sheath,
wherein the stress concentrator is coupled to a surface of the outer sheath via bonding, and
wherein the stress concentrator comprises a triangular cross section.

8. The pyrotechnic system of claim 7 , wherein the stress concentrator defines a cavity therewithin.

9. The pyrotechnic system of claim 7 , wherein the stress concentrator is continuous along the outermost surface of the outer sheath.

10. The pyrotechnic system of claim 7 , wherein the stress concentrator is segmented.

Assignees

• Goodrich Corp

Inventors

• Rosado Jeffrey
• Mcgee Matthew Quinn

Classifications

• B64F5/10

  Manufacturing or assembling aircraft, e.g. jigs therefor · CPC title

• B64D25/08 Primary

  Ejecting or escaping means · CPC title

• C06C5/00 Primary

  Fuses, e.g. fuse cords · CPC title

• B64C1/1476

  Canopies; Windscreens or similar transparent elements · CPC title

• B64C1/32

  Severable or jettisonable parts of fuselage facilitating emergency escape · CPC title