Airbag igniter having double glass seal
US5140906A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Nov 5, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B3/188
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An airbag igniter having an initiator charge in an inner case and an output charge in a surrounding outer case, has a first metal header closing the inner case and a glass seal providing feed through of one or more electrical connections to the initiator charge through the first header. The outer case has a second metal header fitted to it. The second header surrounds the first header in a spaced relationship maintained by a second glass seal. The second glass seal electrically isolates the second header and outer case from the inner header for protection against accidental ignition. The dual glass seals provide protection against maloperation due to gas leakage. A ceramic washer in axial compression between the outer header and a flange of the inner header provides added assurance against failure of the second glass seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.