Curtain air bag for a car

• US 20030230877A1
• Filed: 12/23/2002
• Published: 12/18/2003
• Est. Priority Date: 06/17/2002
• Status: Active Grant

• Current Assignee: Hyundai Mobis Co., Ltd.
• Original Assignee: Hyundai Mobis Co., Ltd.
• Inventors: Kim, Gun-Woo, Kim, Ik-Hwan, Kim, Joon-Ho, Cho, Byong-Ryong
• Granted Patent: US 6,877,769 B2
• Time in Patent Office: Days
• US Class Current: 280/730.2
• CPC Class Codes: B60R 2021/2612 Gas guiding means, e.g. ducts
• CPC Class Codes: B60R 21/232 Curtain-type airbags deploying mainly in a vertical direction from their top edge

Abstract

A curtain air bag for a car is released to protect a passenger in the ribs as well as in the head simultaneously at an automobile accident. The curtain air bag of the present invention includes an inflator unit for generating operation gas, a diffuser connected to the inflator unit and a first cushion for covering around the diffuser over a predetermined area. The upper part of the first cushion is fixed to the roof rail through a cushion holder. Besides, the first cushion is divided into a first area and a second area which limit the sides of the front and rear seats, a third area which forms the front of the first area, and a fourth area which is located between the first area and the second area. Though controlled to expand in spreading the first cushion, the fourth area has at least one non-expanding area. A second cushion is connected in a unit to the third cushion on the lower parts of the first area and the second area to protect a passenger in the ribs. According to the present invention, at a car collision, the operation gas generating from the inflator unit is emitted into the insides of the first, second and third cushions through the diffuser and spread the cushions simultaneously to protect a passenger in the ribs as well as in the head.

Claims

1. A curtain air bag, comprising:

a diffuser for having an opening for emitting operation gas, placed at a predetermined area along the inner side of a roof rail;

a first cushion divided into first and second areas for limiting a front seat and a rear seat, a third area for forming the front line of the first area, and a fourth area placed between the first area and the second area. The first cushion is connected to the opening and covers tightly around the diffuser over a predetermined area;

cushion holders for fixing the first cushion into the roof rail by being coupled to the top of the first cushion;

a second cushion connected to the lower surface of the first area, making a predetermined area, for protecting a passenger in the ribs sitting in the front seat;

a third cushion connected to the lower part of the second area, making a predetermined area, for protecting the passenger in the ribs sitting in the rear seat; and

an inflator unit for providing operation gas for the diffuser by being connected to one part of the first cushion,

wherein the fourth area has at least a non-expanding area which is restricted to spread when the first cushion is spread, and it is constituted to spread the first, second and third cushions simultaneously through operation gas provided by the inflator unit.

2. The curtain air bag according to claim 1, wherein the third area has at least a non-expanding area which is restricted the expanding, since an coming in and out of an inner operation gas is limited when the first cushion is expanded.