Airbag device and method of manufacturing same

• US 7,900,961 B2
• Filed: 01/26/2010
• Issued: 03/08/2011
• Est. Priority Date: 06/10/2005
• Status: Active Grant

• Current Assignee: Autoliv AB (Autoliv Incorporated)
• Original Assignee: Autoliv AB (Autoliv Incorporated)
• Inventors: Aita, Keiko, Shimizu, Yosuke, Hanawa, Akifumi, Yamamoto, Shinobu
• Primary Examiner(s): Dickson; Paul N
• Assistant Examiner(s): Freedman; Laura
• Application Number:
  US12/693,649
• Publication Number:
  US 20100117340A1
• Time in Patent Office: 406 Days
• Field of Search: 280/729, 280/743.1, 280/743.2
• US Class Current: 280/743.1
• CPC Class Codes: B60R 2021/23324 Inner walls crating separate compartments, e.g. communicating with vents
• CPC Class Codes: B60R 21/233 comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other B60R21/232 takes precedence

Abstract

An airbag has a front panel positioned on an occupant side when inflated, and a rear panel of substantially the same shape as the front panel positioned on an opposite side to the occupant. Furthermore, an inflation restricting section, which restricts the inflated shape of the airbag, is formed by drawing together and fixing a portion of the front panel. When the airbag is inflated, the occupant side of the airbag is pulled inwards, thereby forming a cavity on the occupant side.

Claims

1. A method of manufacturing an airbag which protects an occupant inside a vehicle by inflating, comprising the steps of:

preparing a front panel in sheet form to be located on an occupant side when inflated, and a rear panel in sheet form of substantially the same shape as said front panel to be located on an opposite side to said occupant when inflated;

superposing said front panel and said rear panel, and stitching together peripheral edges thereof by flat seaming; and

drawing together and securing portions of said front panel so as to restrict an inflated shape of said airbag, wherein an inflated shape of said airbag is restricted by cutting away a portion of said front panel to form an opening, and then closing said opening, said opening being formed in two locations left-right symmetrical when viewed from said occupant side.

2. A method of manufacturing an airbag according to claim 1, wherein

a cavity is formed on said occupant side when said airbag is inflated.

3. A method of manufacturing an airbag according to claim 2, wherein

a depth in a forward and rearward direction of said cavity is at least 50 mm.

4. A method of manufacturing an airbag according to claim 1, wherein

said opening is formed in an eye shape extending substantially in the vertical direction.