Air bag device for a passenger

• US 5,308,109 A
• Filed: 11/16/1992
• Issued: 05/03/1994
• Est. Priority Date: 12/05/1991
• Status: Expired due to Fees

• Current Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Igawa, Tadahiro
• Primary Examiner(s): Johnson, Brian L.
• Assistant Examiner(s): DICKSON, PAUL N
• Application Number:
  US07/977,103
• Time in Patent Office: 533 Days
• Field of Search: 280/728 A, 280/728 B, 280/728 R, 280/743 R
• US Class Current: 280/728.1
• CPC Class Codes: B60R 21/2171 specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters B60R21/2176 takes precedence

Abstract

An air bag device for a passenger comprises a box-shaped container having a front surface defined as an opening for an air bag expansion, an air bag folded and contained in the container in which the edge of a gas inlet is secured to the container, and a gas generator secured to the rear face of a retaining box opposing to the opening. The container comprises a forward half having the opening and a backward half having the gas generator. A rear edge of the forward half and the front edge of the backward half are faced each other and secured by bolts. An edge of the air bag is put between the rear edge of the forward half and the front edge of the backward half and secured to the container. The bag has a stitch portion protruding near the end thereof.

Claims

1. An air bag device for a passenger comprising:

a box-shaped container including a forward section having a front opening for air bag extension and a rear edge to surround the forward section, and a rearward section having a forward edge to surround the rearward section, said forward edge being joined to the rear edge of the forward section to form the container;

a gas generator secured to the rearward section of the container on a side opposite to the opening,

an air bag folded and contained in the container and having a hem composed of at least two layers of cloth joined together with an outer line of stitches provided near an end of the air bag to protrude from a surface of the air bag, said hem being placed between the rear and forward edges of the forward and rearward sections so that the outer line of protruded stitches is exposed to atmosphere and disposed outside and not between the rear and forward edges of the forward and rearward sections; and

securing means passed through the rear edge of the forward section, the hem, and the forward edge of the rearward section to join them together so that when the air bag is expanded, the protruded stitches engage outside of the rear and forward edges of the forward and rearward sections to thereby prevent slip off of the air bag.

2. An air bag device as defined in claim 1, wherein said hem further includes an inner line of stitches to join the layers of the cloth, said inner line of stitches being arranged parallel to the outer line and located outside the rear and forward edges.

3. An air bag device as defined in claim 2, wherein the rear edge of the forward section and the forward edge of the rearward section are provided with a flange, respectively, such that the flanges face toward each other, and a portion of the hem between the inner and outer lines of stitches is placed between the flanges.

4. An air bag as defined in claim 3, further comprising a strip of another cloth laid over and joined to the hem of the air bag with the inner and outer lines of stitches and disposed between the rear and forward edges of the forward and rearward sections, with the outer line of stitches exposed to atmosphere and disposed outside the rear and forward edges of the forward and rearward sections to thereby prevent slip off of the air bag upon air bag extension.

5. An air bag device as defined in claim 3 wherein each of the flanges protrudes outwardly from a side of the container.

6. An air bag device as claimed in claim 3, wherein the flange of the forward section extends inwardly from a rear end thereof, and the flange of the rearward section extends outwardly from a front end thereof.

7. An air bag device as defined in claim 1, wherein the forward edge of the rearward section has a shape turned back into a U-shaped configuration.