Air bag system and method of folding an air bag
US5899495A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Apr 25, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R21/237
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An air bag system is provided that limits the forward projection of the air bag and reduces production costs wherein folded portions are formed by folding the peripheral portion of a flatly spread air bag along folding lines which are provided at specified locations. The formed folded portions are constrained by stitched portions which are formed by stitching folded-down portions with thread. The air bag is then folded into a size so as to be constrained in a cover. When gas is injected from an inflator, the air bag tears the cover and projects forward and at the same time the stitched portions limit the distance by which the air bag projects forward. As the internal pressure in the air bag increases, the stitched portions break and the folded portions are unfolded so that the air bag expands radially.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.