Double swage airbag inflator vessel and methods for manufacture thereof
US9776592B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2013 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Jun 21, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2021/26082
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high strength dual-swaged airbag inflator vessel comprising a high strength metal material, such as low carbon steel, has a swaged terminal end defining two distinct swaged portions. A reduction of diameter within one of the swaged portions is restricted to be less than or equal to about 30% and in certain variations, less than or equal to about 16% to minimize cold work strain hardening and to reduce loss of ductility. In certain aspects, a second swaged portion within the swaged terminal end has a length of less than or equal to about 10 mm. Methods for making such a dual-swaged airbag inflator vessel are likewise provided. Such dual swage designs have improved reliability and performance in high pressure inflator applications, as well as reduced manufacturing costs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.