Gas generator, with safety device, for an air bag
US5253895A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1991 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Nov 29, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2021/26064
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The gas generator has a cylindrical housing, the front ends of which are closed by closure covers. A cylindrical outer section of the housing consists of high-grade steel; whereas the closure covers are made of aluminum, which has a thermal conductivity which is greater many times greater than that of the high-grade steel. In at least one of the closure covers, there is inserted a self-ignition device, which is provided with an ignitable material, that automatically ignites when reaching a minimum temperature. This minimum temperature clearly lies below the self-ignition temperature of the pressure gas-generating charge contained within the gas generator. The poor thermal conductivity in the cylindrical section of the housing prevents heat transport or transfer from outside via the housing to the pressure gas-generating charge; whereas the good thermal conductivity of the closure covers allows the quick heat transport to the self-ignition device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.