Davidson Textron Inc.

Textron Automotive Company Inc.

Other

Collins & Aikman Products & Co.

Michael J Gallagher

Bruce A Batchelder

Peter J Iannazzi

John D Gray

Richard D Rhodes, Jr

Reed Jacob Hendershot

Craig B Labrie

Jimmy C Rogers

Mark Daniel D'agostini

Aleksandar Georgi Slavejkov

William McHugh Humphrey, Jr

Lawrence R Nichols

Steven L Souders

Vernon A Daniels

Nelson J Morren

Edwin V Stawicki

Shailesh Pradeep Gangoli

Wayne C Salisbury

Avishek Guha

Stephen D Farrington

Douglas Nobbs

James C Carter

Anshu Gupta

John J Kennedy

Jack J Kennedy

David W Syphers

Martin Lawrence

Petr Tlamicha

Thomas David Lee

Liang He

Ranajit Ghosh

Yan Zhao

William J Horan

An apparatus for deploying an air bag through an automotive dash panel () includes an air bag door () integrally formed in the panel and defined by a door perimeter including a frangible edge () of reduced cross section. A dispenser () supports the air bag () behind the door. A metal reaction plate () is positioned between the air bag () and the door (). When the air bag inflates, it forces the reaction plate () to bend around a horizontal hinge line (). As the reaction, plate pivots it concentrates inflation force along a lower portion of the frangible door edge. This helps to predictably separate the door from the dash panel by tearing along the lower door edge and allowing the tear to propagate up two side edges. In one embodiment, the tear also propagates across an upper edge to completely separate the door from the panel. At least one, and preferably two or three tethers () limit how far the door can travel during air bag inflation. A stop member may be included to limit reaction plate bending. After deployment, the reaction plate remains in a position that prevents the door from returning to its original position. A retaining structure may be included to preclude at least a portion of the air bag door from tearing free of the vehicle panel. A hinge () may be embedded in the panel in a position spanning a portion of the door perimeter. A hollow channel may be formed into the panel along the frangible marginal edge to create a substantial strength differential with the door perimeter to promote bending along the hinge and/or to help confine tearing to the frangible marginal edge during air bag deployment.

Apparatus for deploying an air bag through a hard panel

A method of molding a plastic shell having an outer pliable skin layer and a foam backing layer comprises casting a first skin layer portion from wear resistant material in a first casting sequence for those areas of the panel susceptible to high wear and in a second casting sequence casting self-skinning foamable material against the remaining portion of the mold surface and over the first-cast skin layer portion to develop, simultaneously, the remaining outer skin layer portion of the shell and a foam backing layer which extends across the entire skin layer.

Molding method for making plastic foam-backed shells

A method of forming a motor vehicle instrument panel with a flexibly tethered air bag deployment door includes the steps of molding an instrument panel with a first plastics material to a desired shape and with an integral air bag deployment door whose opening is defined by a tear seam formed by a groove molded in one side of the panel and with an integral mounting/hinge flange that extends from an inside surface of the door, and forming a bonded layer of second plastics material on one side of the flange and the inside surface of a potentially frangible portion of the door. The second plastics material has the physical characteristic of remaining ductile to a substantial degree at low temperatures substantial below the temperature at which the first plastics material becomes brittle and as a result the bonded layer forms a tether that connects the frangible door portion to the mounting/hinge flange in a flexible manner when this door portion breaks away from the flange because of embrittlement of the first plastics material at the low temperatures on tearing of the tear seam and opening movement of the door by an inflating air bag pressing against the inside surface of the frangible door portion.

Method of forming a motor vehicle instrument panel with a flexibly tethered air bag deployment door

An apparatus for deploying an air bag through an automotive dash panel includes an air bag door integrally formed in the panel and defined by a door perimeter including a frangible edge of reduced cross section. A dispenser supports the air bag behind the door. A metal reaction plate is positioned between the air bag and the door. When the air bag inflates, it forces the reaction plate to bend around a horizontal hinge line. As the reaction plate pivots it concentrates inflation force along a lower portion of the frangible door edge. This helps to predictably separate the door from the dash panel by tearing along the lower door edge and allowing the tear to propagate up two side edges. In one embodiment, the tear also propagates across an upper edge to completely separate the door from the panel. At least one, and preferably two or three tethers limit how far the door can travel during air bag inflation. A stop member may be included to limit reaction plate bending. After deployment, the reaction plate remains in a position that prevents the door from returning to its original position. A retaining structure may be included to preclude at least a portion of the air bag door from tearing free of the vehicle panel. A hinge may be embedded in the panel in a position spanning a portion of the door perimeter. A hollow channel may be formed into the panel along the frangible marginal edge to create a substantial strength differential with the door perimeter to promote bending along the hinge and/or to help confine tearing to the frangible marginal edge during air bag deployment.

Apparatus for deploying an airbag through a hard panel

A method for manufacture an air bag cover includes providing a cover skin made of a polymeric material and weakening a seam region in the skin by selective exposure to ultraviolet light.

Air bag tear seam and method of manufacture

An apparatus for deploying an air bag through an automotive dash panel includes an air bag door integrally formed in the panel and defined by a frangible edge of reduced cross section. A dispenser supports the air bag behind the door. A metal reaction plate is positioned between the air bag and the door. When the air bag inflates it forces the reaction plate to bend around a horizontal hinge line. As the reaction plate rotates it concentrates inflation force along a lower portion of the frangible door edge. This helps predictably separate the door from the dash panel by tearing along the lower door edge and allowing the tear to propagate up two side edges. In one embodiment, the tear also propagates across an upper edge to completely separate the door from the panel. At least one, and preferably two or three tethers limit how far the door can travel during air bag inflation. A stop member may be included to limit reaction plate bending. After deployment, the reaction plate remains in a position that prevents the door from returning to its original position.

A molded motor vehicle instrument panel made of a thermoplastic material has an integral air bag deployment door for a passenger side air bag that is defined by a tear seam and is normally retained by an integral flexible mounting/hinge flange to a part of the vehicle structure when the seam is torn by the inflating air bag and wherein this flange then bends to allow the door to swing open to allow deployment of the air bag through an opening in the instrument panel while retaining same to the vehicle structure as the door is then free of the instrument panel. At very low temperatures, a portion of the air bag door can break away from the mounting/hinge flange because of plastic embrittlement at these low temperatures and the high bending stresses encountered at this juncture. This separation of the broken door portion from the vehicle structure is prevented by a tethering hinge that is formed of a strong flexible sheet material that spans this critical juncture between the mounting/hinge flange and door and remains flexible at these very cold temperatures to retain the broken door portion to the vehicle structure.

Motor vehicle instrument panel with flexible tethering hinged air bag

A process for the production of a rigid multi-layer composite articles (20) prepared from reacting inter alia a sheet of an open cell foam material (22) impregnated with a binder resin, such as isocyanate resin, to fill the cells of the foam material (22) and a polymerization catalyst to cause the reaction of isocyanate and form isocyanurate linkages, urethane linkages, urea linkages, trimer linkages, biuret linkages, and/or allophante linkages to render the composite article (20) rigid, and having a layer of reinforcing fibers, such as glass fibers, completely (24) or partially (25) impregnated by the binder resin affixed to a surface of the foam material (22) by the binder resin. Fasteners (27) formed of a thermoplastic material are provided having an appropriate adhesion surface. The adhesion surface of each of the fasteners (27) is melted by any of the well known techniques such as spin welding, etc., and caused to engulf the fibers of the layer which are not impregnated or are partially impregnated, or to strip the polymerized resin from the layer of reinforcing fibers which may be completely impregnated and to engulf the stripped fibers. Upon resolidification of the molten material of the fasteners (27), the fasteners (27) are firmly affixed to the layer of reinforcing fibers and thereby to the composite article.

Process for the production of a multi-layer composite article having

A method of forming a motor vehicle instrument panel with a flexibly tethered air bag deployment door comprises the steps of molding an instrument panel with a first plastics material to a desired shape and with an integral air bag deployment door whose opening is defined by a tear seam formed by a groove molded in one side of the panel and with an integral mounting/hinge flange that extends from an inner side of the door, and forming a bonded layer of second plastics material on one side of the flange and the inner side of a potentially frangible portion of the door. The second plastics material has the physical characteristic of remaining ductile to a substantial degree at low temperatures substantial below the temperature at which the first plastics material becomes brittle and as a result the bonded layer forms a tether that connects the frangible door portion to the mounting/hinge flange in a flexible manner when this door portion breaks away from the flange because of embrittlement of the first plastics material at the low temperatures on tearing of the tear seam and opening movement of the door by an inflating air bag pressing against the inner side of the frangible door portion.

Method of forming a motor vehicle instrument panel with a flexibly

An automotive instrument panel includes a molded plastic retainer formed with an integral airbag deployment door surrounded by a channel defining a tear seam enabling the door to separate and hinge outwardly upon deployment of the airbag. A foam-backed cover of flexible plastic material is applied over the outer surface of the panel and is severed along the length of the channel to eliminate any influence that the cover may have on resisting the opening of the door. The severed cover portion can either be removed to expose the door or else be left in tact and bonded to the door.

Instrument panel having integrated airbag deployment door

Growing community of inventors

Hampton, NH, United States of America

Michael J Gallagher