Method and arrangement for forming an air bag deployment opening
US5478106A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1994 |
| Grant date | Dec 26, 1995 |
| Priority date | — |
| Expiry date | Jul 22, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2021/21654
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An arrangement is disclosed for forming an air bag deployment opening in an instrument panel behind which a passenger side air bag is stored, just prior to the time the air bag is deployed, the arrangement including a pressure driven cutting edge cutting through the covering layer at the start of air bag deployment. A pyrotechnic charge ignited by the air bag ignition circuitry is used to develop the pressure, and various devices used to drive the cutting edge, including a flattened tube enclosing the charge and expanded by ignition of the charge. A separate door substrate panel and frame are fit into a preformed opening in the instrument panel, and the tube may be mounted to the door substrate panel, the frame, or a separate membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.