# US 11,305,880 B2 · Arm restraint deployment systems for ejection seats

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,305,880 B2
- Document ID: US11305880B2
- Status: Granted
- Kind: B2
- Application number: 16/707,625
- Filed: 2019-12-09
- Published: 2021-06-10
- Granted: 2022-04-19
- Earliest claimed: 2019-12-09
- Assignees: AMI Industries, Inc.
- Applicants: AMI Industries, Inc.
- Inventors: Steve Holstine; Cyle Teal
- Web page: https://patentgrep.com/patent/US11305880B2

## CPC

- B64D 25/10: Ejector seats
- B64D 11/062: {Belts or other passenger restraint means for passenger seats}
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT

## Abstract

An arm restraint assembly for an ejection seat may comprise a primary arm and a primary arm deployment system operationally coupled to the primary arm. The primary arm deployment system may be configured to rotate the primary arm about a primary arm pivot joint. The primary arm deployment system may be configured to attach to the ejection seat such that the primary arm deployment system translates with the ejection seat.

## Claims

### Claim 1

An arm restraint assembly for an ejection seat, comprising:
a primary arm; and
a primary arm deployment system attached to the ejection seat and operationally coupled to the primary arm, the primary arm deployment system being configured to rotate the primary arm about a primary arm pivot joint, wherein the primary arm deployment system comprises:
a cylinder configured to receive a fluid; and
a strut piston coupled to the primary arm and configured to translate relative to the cylinder.

### Claim 2 (depends on 1)

The arm restraint assembly of claim 1, wherein the strut piston is coupled to the primary arm via a pivot joint.

### Claim 3 (depends on 2)

The arm restraint assembly of claim 2, wherein the primary arm deployment system further comprises a shear pin configured to block translation of the strut piston.

### Claim 4 (depends on 2)

The arm restraint assembly of claim 2, wherein the pivot joint is configured to allow multidirectional movement of the primary arm relative to the strut.

### Claim 5 (depends on 1)

The arm restraint assembly of claim 1, further comprising a fluid supply fluidly coupled to the cylinder.

### Claim 6

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; and
a primary arm deployment system attached to the ejection seat and operationally coupled to the primary arm, the primary arm deployment system being configured to rotate the primary arm about a primary arm pivot joint, wherein the primary arm deployment system includes:
a first biasing member configured to force the primary arm away from the seat back;
a latch configured to rotate relative to the primary arm; and
a fluid supply operatively coupled to the latch, wherein the latch is configured to rotate about a latch pivot joint in response to a fluid being output from the fluid supply.

### Claim 7 (depends on 6)

The ejection seat of claim 6, wherein the primary arm deployment system further comprises a second biasing member configured to rotate the primary arm about the primary arm pivot joint.

### Claim 8 (depends on 7)

The ejection seat of claim 7, wherein the first biasing member comprises a compression spring and the second biasing member comprises a torsion spring.

### Claim 9 (depends on 6)

The ejection seat of claim 6, wherein the primary arm deployment system further comprises:
a primary arm bracket coupling the primary arm to the seat back, wherein the primary arm is rotationally coupled to the primary arm bracket via the primary arm pivot joint; and
a flange extending from the primary arm bracket, wherein the first biasing member is located between the primary arm and the flange.

### Claim 10 (depends on 6)

The ejection seat of claim 6, wherein the arm restraint assembly further comprises a netting coupled to the primary arm.

### Claim 11 (depends on 10)

The ejection seat of claim 10, wherein the arm restraint assembly further includes a secondary arm configured to rotate about a secondary arm pivot joint, and wherein an axis of rotation of the secondary arm is non-parallel to an axis of rotation of the primary arm.

### Claim 12

An arm restraint assembly for an ejection seat, comprising:
a primary arm; and
a primary arm deployment system operationally coupled to the primary arm, the primary arm deployment system being configured to rotate the primary arm about a primary arm pivot joint, wherein the primary arm deployment system includes:
a first biasing member configured to force the primary arm away from the seat back; and
a second biasing member configured to rotate the primary arm about the primary arm pivot joint, wherein the first biasing member comprises a compression spring and the second biasing member comprises a torsion spring.

### Claim 13 (depends on 12)

The arm restraint assembly of claim 12, wherein the primary arm deployment system further comprises:
a latch configured to rotate relative to the primary arm; and
a fluid supply operatively coupled to the latch, wherein the latch is configured to rotate about a latch pivot joint in response to a fluid being output from the fluid supply.

### Claim 14 (depends on 13)

The arm restraint assembly of claim 13, wherein the primary arm deployment system further comprises a fluid supply line fluidly coupled to the fluid supply and located through an orifice defined by the primary arm.

### Claim 15 (depends on 12)

The arm restraint assembly of claim 12, further comprising a secondary arm configured to rotate about a secondary arm pivot joint, and wherein an axis of rotation of the secondary arm is non-parallel to an axis of rotation of the primary arm.

### Claim 16 (depends on 12)

The arm restraint assembly of claim 12, wherein the primary arm deployment system further comprises:
a primary arm bracket, wherein the primary arm is rotationally coupled to the primary arm bracket via the primary arm pivot joint; and
a flange extending from the primary arm bracket, wherein the first biasing member is located between the primary arm and the flange.