Gas generating compositions for air bag
US6562161B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1997 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Jul 1, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC06D5/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Gas generating pellets for an air bag system causes the initial inflating speed of the air bag to be increased at a reduced rate to prevent a passenger from being injured due to vigorous inflation of the air bag in the initial period, while maintaining sufficient ability to restrict the passenger after 35 to 50 milliseconds from the start of the inflation.Combustion of the gas generating pellets for an air bag system are controlled such that in a tank test conducted with respect to a gas generator using the pellets, where a desired maximum tank pressure is P (kPa), and a period of time from the start of rising of the tank pressure to the time when the maximum tank pressure P (kPa) is reached is T milliseconds, the tank pressure measured after 0.25×T milliseconds is not higher than 0.20×P (kPa), and the tank pressure measured after 0.80×T milliseconds is not lower than 0.70×P (kPa). In particular, the gas generating pellets may be formed of a non-azide gas generating composition, and each pellet may be formed with a length of L (mm) and a hole having an inside diameter d(mm) of 0.2 to 1.5 (mm), such that the ratio L/d is 3.0 or larger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.