# US 10,118,584 B2 · Airbag inflator pad

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- Number: US 10,118,584 B2
- Document ID: US10118584B2
- Status: Granted
- Kind: B2
- Application number: 15/619,965
- Filed: 2017-06-12
- Published: 2017-09-28
- Granted: 2018-11-06
- Earliest claimed: 2014-02-20
- Assignees: Joyson Safety Systems Acquisition LLC
- Applicants: TK Holdings Inc.
- Inventors: Deborah L. Hordos
- Web page: https://patentgrep.com/patent/US10118584B2

## CPC

- B60R 21/2644: {using only solid reacting substances, e.g. pellets, powder}
- F42B 3/04: for producing gas under pressure {(generators of inflation fluid especially adapted for vehicle air bags B60R21/26)}
- B60R 2021/2648: {comprising a plurality of combustion chambers or sub-chambers}
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D)

## Abstract

A gas generator contains an anti-vibration, auto-igniting pad. The pad is formed from a mixture of a known auto-igniting composition mixed with an elastomeric polymer, and then cured, thereby forming a polymer—auto-igniting composition matrix. The pad is placed in thermodynamic communication with a housing on the gas generator, thereby enhancing the safety of the gas generator while yet providing a multi-functional pad. The pad is formulated to reduce vibrations when biased against an associated gas generant, while augmenting the amount of gas produced upon gas generator activation, while yet providing an auto-igniting material that is ignited during a high heat event.

## Claims

### Claim 1

A gas generator comprising:
a gas generating composition; and
an auto-igniting pad comprising:
a fuel;
an oxidizer; and
an elastomeric polymer in an amount from about 30-70 weight percent relative to the total weight of the auto-igniting pad.

### Claim 2 (depends on 1)

The gas generator of claim 1 wherein the auto-igniting pad comprises a fuel comprising a tetrazole, a triazole, a carboxylic acid, a sugar, or a mixture thereof.

### Claim 3 (depends on 1)

The gas generator of claim 1 wherein said oxidizer comprises an alkali metal nitrate, an alkaline earth metal nitrate, a transition metal nitrate, a metal perchlorate, a non-metal perchlorate, or a mixture thereof.

### Claim 4 (depends on 1)

The gas generator of claim 1, wherein the auto-igniting pad further comprises a molybdenum salt or a molybdenum oxide.

### Claim 5 (depends on 1)

The gas generator of claim 1 wherein the auto-igniting pad, upon combustion, produces up to 50 percent by weight of gas relative to the total weight of the pad prior to combustion.

### Claim 6 (depends on 1)

The gas generator of claim 1, wherein the auto-igniting pad is auto-ignitable at a temperature from 150°-210° C.

### Claim 7 (depends on 1)

The gas generator of claim 1, wherein the auto-igniting pad has an auto-ignition temperature lower than the auto-ignition temperature of the gas generating composition.

### Claim 8 (depends on 1)

The gas generator of claim 1, comprising a first combustion chamber, said gas generating composition contained within said first combustion chamber.

### Claim 9 (depends on 8)

The gas generator of claim 8, wherein said auto-igniting pad is contained within said first combustion chamber.

### Claim 10 (depends on 5)

The gas generator of claim 5, wherein the auto-igniting pad is biased against the gas generating composition.

### Claim 11 (depends on 1)

A vehicle occupant protection system comprising the gas generator of claim 1.

### Claim 12 (depends on 8)

The gas generator of claim 8, further comprising a second combustion chamber comprising a propellant composition, said second chamber in ignitable communication with said first chamber.

### Claim 13 (depends on 12)

The gas generator of claim 12, wherein said second combustion chamber comprises a second auto-igniting pad comprising:
a fuel;
an oxidizer; and
an elastomeric polymer in an amount from about 30-70 weight percent relative to the total weight of the said second auto-igniting pad.

### Claim 14 (depends on 13)

The gas generator of claim 13 wherein the second auto-igniting pad comprises a fuel comprising a tetrazole, a triazole, a carboxylic acid, a sugar, or a mixture thereof.

### Claim 15 (depends on 13)

The gas generator of claim 13 wherein wherein said oxidizer comprises an alkali metal nitrate, an alkaline earth metal nitrate, a transition metal nitrate, a metal perchlorate, a non-metal perchlorate, or a mixture thereof.

### Claim 16 (depends on 13)

The gas generator of claim 13, wherein said second auto-igniting pad comprises a urethane, a silicone, a rubber, a cellulosic derivative, a ethylene propylene diene polymer, or a mixture thereof.

### Claim 17 (depends on 13)

The gas generator of claim 13, wherein said second auto-igniting pad polymer comprises silicone.

### Claim 18 (depends on 13)

The gas generator of claim 13, wherein the said second auto-igniting pad is auto-ignitable at a temperature from 150°-210° C.

### Claim 19 (depends on 13)

The gas generator of claim 13, wherein the auto-igniting pad has an auto-ignition temperature lower than the auto-ignition temperature of the propellant composition.

### Claim 20 (depends on 13)

A vehicle occupant protection system comprising the gas generator of claim 13.