Daicel Chemical Industries, Ltd.

Gregory Swiderski

Steven R Nelson

An air bag for use in connection with a gas generator is provided. The air bag is of a double-wall construction. The air bag is fitted to the housing of a gas generator and a gas jet opening for allowing the air bag to communicate with the housing is provided. A gas generated by the gas generator due to an impact is charged into the air bag. The air bag has a double-wall structure including a first air bag and a second air bag having a greater capacity than the first air bag disposed about and attached to the first air bag. The first air bag constitutes an air storage chamber which receives air from the atmosphere through an air intake path and stores the air. A gas storage chamber is formed between the first and second air bags which receives a combustion gas from the gas jet opening and temporarily stores the combustion gas. The air intake path is typically a hollow path between the atmosphere and the air storage chamber. The first air bag has an opening therein which establishes communication between the gas storage chamber and the air storage chamber.

Air bag having double-wall construction

The gas generator for air bags of the present invention includes a housing made up of first and second shells, each shell having a circular part and an outer wall formed along the periphery of the circular part. Installed in the housing is a gas generating device. Openings are formed in the first shell for establishing communication between a filter chamber in the hosing and an air bag. A partition member defines an annular space in the housing extending from a center tube installed at the center of the housing. A filter chamber is formed between the cylindrical wall portion of the partition member and the outer wall of the first shell in such a way that the filter chamber overlaps the combustion chamber in the axial direction along the outer circumference of the combustion chamber, whereby gases produced by the gas generating device on receiving impacts are introduced axially from the combustion chamber, through the filter chamber and into an air bag to protect a passenger from impacts.

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Dublin, OH, United States of America

Gregory Swiderski