Hooded heat shield for an automotive air bag cushion

• US 5,520,415 A
• Filed: 08/02/1995
• Issued: 05/28/1996
• Est. Priority Date: 05/26/1994
• Status: Expired due to Term

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Morton International Incorporated (Autoliv Incorporated)
• Inventors: Frary, Lisa M., Lewis, Trudy C.
• Primary Examiner(s): Culbreth, Eric D.
• Application Number:
  US08/510,250
• Time in Patent Office: 300 Days
• Field of Search: 280/743.1, 280/728.1, 280/732, 280/742
• US Class Current: 280/743.1
• CPC Class Codes: B60R 2021/23123 Heat protection panels
• 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
• CPC Class Codes: B60R 21/23 Inflatable members B60R21/18 takes precedence; connection to inflation fluid source retainers B60R21/217

Abstract

A heat resistant fabric shield that protects the inside surfaces of the top and side sections of an air bag cushion is disclosed. The fabric shield is attached to the air bag cushion adjacent to the gas inlet opening. Upon deployment of the cushion the fabric shield is moved into position by the flow of hot gases from the inflator to protect the inside surfaces of the cushion from the hot gases. After deployment the fabric shield falls into position on top of the inflator thus protecting and insulating the cushion from the hot inflator.

Claims

1. A device for protecting the interior surface of a vehicle air bag cushion from hot gases generated by a gas generator during the deployment of said air bag cushion, said air bag cushion having a top section, a bottom section and side sections, said top, bottom and side sections defining an interior volume, and having a gas inlet opening;

said device comprising a hooded non-flammable fabric shield folded within said air bag cushion and having a first edge having a center section attached to said cushion adjacent to the gas inlet opening and edge sections attached to the side sections of the cushion, and a second, unattached edge opposite thereof;

said shield having a middle section and side panels at opposite edges of said middle section and being adapted to being moved against the interior top surface of said air bag cushion adjacent said gas inlet by the hot gases and to falling over said gas generator to insulate the cushion from the inflator after said gas generator has stopped generating hot gases.