Oct 20, 2026

US12767085 - Gas generator and airbag module assembly

A gas generator includes a gas generating agent that generates gas by combustion, a housing made of metal and accommodating the gas generating agent therein, the housing having a gas discharge port formed therein, through which the gas is emitted to an exterior of the housing, an ignition device configured to ignite the gas generating agent by actuation; and a temperature rise suppressing member provided in contact with an outer surface of a housing to cover at least a part of the outer surface. The temperature rise suppressing member includes an endothermic agent that absorbs heat of the housing by undergoing a chemical change or a state change by the heat of the housing when a temperature of the housing rises due to combustion of a gas generating agent, and a binder agent present together with the endothermic agent such that the temperature rise suppressing member has flexibility.

Assignee: DAICEL CORPORATION
Inventors: Shunji Nakai, Nobuyuki Katsuda
Filing date: 2025-07-23

gasgeneratorairbagmoduleassembly

The patent describes a gas generator designed for airbag modules, featuring a metal housing that contains a gas generating agent and includes a gas discharge port for gas emission. It also incorporates a temperature rise suppressing member with an endothermic agent that absorbs heat during combustion, enhancing safety by preventing overheating.

Claim 1

1 . A gas generator comprising: a gas generating agent that generates gas by combustion; a housing made of metal, the housing accommodating the gas generating agent therein, the housing having a gas discharge port formed therein, through which the gas generated by combustion of the gas generating agent is emitted to an exterior of the housing; an ignition device configured to ignite the gas generating agent by actuation; and a temperature rise suppressing member provided in contact with an outer surface of the housing to cover at least a part of the outer surface, wherein the temperature rise suppressing member includes: an endothermic agent that absorbs heat of the housing by undergoing a chemical change or a state change by the heat of the housing when a temperature of the housing rises due to combustion of the gas generating agent; and a binder agent present together with the endothermic agent such that the temperature rise suppressing member has flexibility. a gas generating agent that generates gas by combustion; a housing made of metal, the housing accommodating the gas generating agent therein, the housing having a gas discharge port formed therein, through which the gas generated by combustion of the gas generating agent is emitted to an exterior of the housing; an ignition device configured to ignite the gas generating agent by actuation; and a temperature rise suppressing member provided in contact with an outer surface of the housing to cover at least a part of the outer surface, wherein the temperature rise suppressing member includes: an endothermic agent that absorbs heat of the housing by undergoing a chemical change or a state change by the heat of the housing when a temperature of the housing rises due to combustion of the gas generating agent; and a binder agent present together with the endothermic agent such that the temperature rise suppressing member has flexibility.

Google Patents

https://patents.google.com/patent/US12767085

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12767085