Land vehicles – Wheeled – Attachment
Reexamination Certificate
1999-05-12
2001-07-17
Swann, J. J. (Department: 3611)
Land vehicles
Wheeled
Attachment
C280S736000
Reexamination Certificate
active
06260878
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an air bag for a side air bag device to be mounted on an automobile.
2. Description of the Related Art
In the prior art, an air bag for a side air bag device of this kind is folded and accommodated in the peripheral edge of an opening of a door or window of the interior side of a vehicle (as disclosed in Unexamined Published Japanese Patent Application No. 9-240409 and 9-315253).
In the peripheral edge of the opening on the interior side, there are arranged a pillar portion and a roof side rail portion. As a result, the air bag is accommodated over the pillar portion and the roof side rail portion on the interior side. This air bag is developed and expanded to cover the opening when an inflating gas flows in.
SUMMARY OF THE INVENTION
The air bag for the side air bag device of this kind has been desired to maintain a high internal pressure for a long time. This desire is intended to cope with lateral turns of the vehicle.
An object of the invention is to provide an air bag for a side air bag device, which can maintain a high internal pressure for a long time.
This object is achieved by an air bag having the following construction. The air bag according to the invention is folded and accommodated over a roof side rail portion on the peripheral edge of an opening in an interior side of a vehicle. Further, the air bag is developed and expanded to cover the opening when an inflating gas flows in. In the air bag, moreover, the internal pressure of the inflating gas at 3 secs after the start of inflow is maintained at 30% or more of the internal pressure at 500 msecs after the start of inflow.
Moreover, the air bag is so desirably constructed that the internal pressure at 500 msecs after the start of inflow of the inflating gas is kept at 10 kPa or more.
In the air bag according to the invention, the internal pressure at 3 secs after the start of inflow of the inflating gas is maintained, as the internal pressure after the inflow start, at 30% or more of the internal pressure at 500 msecs after the start of inflow. When the vehicle is laterally turned by an impact or the like from the side of the vehicle, its turn is usually stopped within about 3 secs after the impact is applied. In the air bag of the invention, therefore, the internal pressure of the air bag is sufficiently maintained until the lateral turn of the vehicle stops. As a result, the air bag of the invention can properly restrain the passenger.
If the internal pressure in the air bag at 500 msecs after the inflow start is at 10 kPa or more, moreover, there can be achieved the following effects. Specifically, the internal pressure of the air bag is maintained at 3 kPa or more until 3 secs after the effect of the impact occurs. As a result, the air bag of the invention can suitably restrain the passenger.
REFERENCES:
patent: 5316336 (1994-05-01), Taguchi et al.
patent: 5897929 (1999-04-01), Li et al.
patent: 5967550 (1999-10-01), Shirk et al.
patent: 6012738 (2000-01-01), Beisswenger
patent: 6037279 (2000-03-01), Brookman et al.
patent: 6056316 (2000-05-01), Yamaji et al.
patent: 6073961 (2000-06-01), Bailey et al.
patent: 6082761 (2000-07-01), Kato et al.
patent: 09240409 (1997-09-01), None
patent: 09315253 (1997-12-01), None
Dunn David R.
Pillsbury & Winthrop LLP
Swann J. J.
Toyoda Gosei Co., Ltd
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