Cold deployment pyrotechnic inflator for air bag systems
US5732972A · kind A · utility
8Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1996 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Apr 10, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R21/272
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A passenger air bag inflator using pressurized inert gas upon initial deployment to provide cool gas to the folded air bag. After the bag has started to unfold, the remaining gas is provided by pyrotechnic gas generant. Pyrotechnic gas expands against a piston. The piston compresses the inert gas and forces it to exhaust from the inflator. Upon expulsion of the inert gas, the piston then becomes a filter for the pyrotechnic. The system provides a reduction in air bag stresses from fast hot gas deployments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.