Back to results
US 6,883,830 B2Granted
Pressurized medium for inflator
AssigneeDaicel Chemical Industries, Ltd.
InventorsMasayuki Nakayasu, Yuzo Goto, Yasunori Iwai
Life of this patent
Estimating the term…
Abstract
The present invention provides an inflator capable of prolonging the duration of inflation of an air bag. Since an inflator housing 12 of an inflator 10 for a curtain air bag is charged with a pressurized medium comprising a mixed gas of He and Ar (He:Ar=3:7 to 7:3), the sound velocity of the pressurized medium is smaller than that of a pressurized medium comprising He only, and the viscosity of the former is higher than that of the latter, so that the duration of the inflation of an air bag can be prolonged.
Claims11
An inflator for inflating an air bag, comprising:
- an inflator housing having an opening portion at one end thereof;
- a diffuser portion attached to the opening portion of the inflator housing and provided with at least one gas discharging port, a ratio (A1/A2) of a total area (A1) of the at least one gas discharging port and an area (A2) of the opening portion being equal to or greater than 0.015 and equal to or smaller than 1;
- and
- a pressurized medium contained in the inflator housing, the pressurized medium consisting mainly of a mixture of helium and argon, and a coefficient of viscosity of the pressurized medium being 25 to 40 μPas at 50 MPa and at 300° K.
1 more element
Dependencies are inferred from the claim text.