Arm restraint latch release assembly

Patent metadata

Field	Value
Publication number	US-11077950-B2
Application number	US-201916422528-A
Country	US
Kind code	B2
Filing date	May 24, 2019
Priority date	May 24, 2019
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

An arm restraint assembly for an ejection seat may comprise a primary arm configured to pivot about a primary arm pivot joint. A latch may be coupled to the primary arm. The latch may comprise a first pair of lugs and may be configured to pivot relative to the primary arm. A primary shear pin may extend between the first pair of lugs. A lanyard may be coupled to the primary shear pin.

First claim

What is claimed is:

1. An arm restraint assembly for an ejection seat, comprising:
a primary arm configured to pivot about a primary arm pivot joint;
a latch coupled to the primary arm, the latch comprising a first pair of lugs, wherein the latch is configured to pivot relative to the primary arm;
a primary shear pin extending between the first pair of lugs; and
a lanyard coupled to the primary shear pin.

2. The arm restraint assembly of claim 1 , further comprising a netting coupled to the primary arm.

3. The arm restraint assembly of claim 2 , further comprising a secondary arm coupled to the netting, the secondary arm being configured to pivot about a secondary arm pivot joint.

4. The arm restraint assembly of claim 3 , wherein the secondary arm defines a secondary orifice, and wherein in a non-deployed position a hook portion of the latch is located through the secondary orifice.

5. The arm restraint assembly of claim 1 , further comprising a secondary shear pin coupled to a second pair of lugs of the latch.

6. The arm restraint assembly of claim 5 , wherein the secondary shear pin is designed to shear at a first minimum shear load, and wherein the primary shear pin is designed to shear at a second minimum shear load, the second minimum shear load being greater than the first minimum shear load.

7. The arm restraint assembly of claim 1 , further comprising a lock assembly coupled to the primary arm, wherein the lock assembly is configured to restrict rotation of the primary arm.

8. The arm restraint assembly of claim 7 , further comprising a primary arm bracket coupled to the primary arm, wherein the lock assembly comprises a tab coupled to the primary arm and biased toward the primary arm bracket, and wherein the primary arm bracket defines a groove configured to receive the tab in response to the primary arm rotating a predetermined number of degrees.

9. An ejection seat, comprising:
a seat back; and
an arm restraint assembly coupled to the seat back, the arm restraint assembly comprising:
a primary arm configured to pivot relative to the seat back;
a latch coupled to the primary arm, the latch comprising a first pair of lugs;
a primary shear pin extending between the first pair of lugs; and
a lanyard coupled to the primary shear pin.

10. The ejection seat of claim 9 , wherein the arm restraint assembly further comprises a secondary arm, wherein in a non-deployed position the secondary arm is located between the primary arm and the seat back.

11. The ejection seat of claim 10 , wherein the secondary arm defines a secondary orifice, and wherein in the non-deployed position a portion of the latch is located through the secondary orifice.

12. The ejection seat of claim 9 , wherein the arm restraint assembly further comprises a secondary shear pin extending between a second pair of lugs of the latch.

13. The ejection seat of claim 12 , wherein the second pair of lugs extends from a surface of the latch, and wherein in a non-deployed position the lanyard is located between the secondary shear pin and the surface of the latch.

14. The ejection seat of claim 9 , wherein the latch further comprises a leg configured to limit a rotation of the latch relative to the primary arm.

15. The ejection seat of claim 9 , wherein the arm restraint assembly further comprises a lock assembly coupled to the primary arm, wherein the lock assembly is configured to restrict rotation of the primary arm.

16. The ejection seat of claim 15 , wherein the arm restraint assembly further comprises a primary arm bracket coupled to the primary arm, and wherein the lock assembly comprises a tab coupled to the primary arm, and wherein the primary arm bracket defines a groove configured to receive the tab in response to the primary arm rotating a predetermined number of degrees.

17. An arm restraint assembly configured to deploy in response to expulsion of an ejection seat from a cockpit, the arm restraint assembly comprising:
a left arm restraint and a right arm restraint, wherein the left arm restraint and the right arm restraint each comprise:
a primary arm configured to pivot to a fully-deployed position within the cockpit;
a latch coupled to the primary arm, the latch comprising a first pair of lugs; and
a primary shear pin extending between the first pair of lugs.

18. The arm restraint assembly of claim 17 , wherein the left arm restraint and the right arm restraint each further comprise a lanyard coupled to the primary shear pin.

19. The arm restraint assembly of claim 17 , wherein the left arm restraint and the right arm restraint each further comprise a secondary shear pin extending between a second pair of lugs of the latch.

20. The arm restraint assembly of claim 17 , wherein the left arm restraint and the right arm restraint each further comprise a secondary arm, and wherein in a non-deployed position a portion of the latch is located through a secondary orifice defined by the secondary arm.

Assignees

• Ami Ind Inc

Inventors

• Teal Cyle
• Mastrolia Bradley

Classifications

• B64D11/0689 Primary

  specially adapted for pilots · CPC title

• B64D25/04

  Seat modifications · CPC title

• B64D25/10 Primary

  Ejector seats · CPC title