Air bag inflator having helical gas floor space
US5248162A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1991 |
| Grant date | Sep 28, 1993 |
| Priority date | — |
| Expiry date | Nov 19, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R21/2644
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An apparatus for inflating a vehicle occupant restraint such as an air bag comprises a source of gas for inflating the air bag. A filter is disposed outward of the gas source and has an outer surface. A pressure controlling member is spaced outward of the filter an encircles the gas source and the filter. A helical strand is interposed between the filter and the pressure controlling member to create a plenum between them. Gas supplied by the gas source accumulates in the gap until it builds up enough pressure to burst the pressure controlling member. The strand has a smooth cylindrical outer surface. Thus, any contact between the strand and the foil layer is line contact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.