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US 6,631,923 B2Granted
Airbag and method of forming the same
AssigneeTakata-Petri AG
InventorsNick Eckert, Carsten Rietz, Ingo Müller
Life of this patent
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Abstract
An airbag, particularly for the knee or head region of a vehicle occupant, has a substantially cylindrical main region. The airbag comprises a substantially cylindrical fabric tube whose lateral ends are stitched after folding the tube into a predetermined pattern having at least two looped segments. The fabric tube can be formed by joining the lateral edge of a rectangular fabric blank.
Claims17
An airbag comprising:
- a tube folded longitudinally in a predetermined fold pattern having a plurality of individual looped segments and a pair of lateral seams that close each lateral end of the tube and maintain the fold pattern,
- additional fabric portions inserted at the lateral ends of the airbag between or into the individual segments, and secured by the lateral seams;
- wherein the airbag becomes substantially cylindrical upon inflation.
A method of forming an airbag, comprising the steps of:
- providing a tube;
- folding the tube longitudinally to form a fold pattern having a plurality of individual segments;
- closing each lateral end of the tube with a lateral seam, which also maintains the fold pattern,
- inserting additional fabric portions at the lateral ends of the airbag between or into the individual segments, and
- securing the fabric portions with the lateral seams;
- wherein the airbag becomes substantially cylindrical when inflated.
3 more elements
Dependencies are inferred from the claim text.