MONOLITHIC GAS GENERANT GRAINS
First Claim
1. An inflatable restraint device comprising:
- an airbag for restraining motion of a vehicle occupant; and
at least one gas generant for inflating the airbag in the form of a monolithic annular disk having a plurality of apertures and further having a linear burn rate of greater than or equal to about 1.6 inches per second at a pressure of about 3,000 pounds per square inch, wherein the at least one gas generant is substantially free of polymeric binder and produces an effluent for inflating the airbag that is substantially free of chloride-containing species
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Accused Products
Abstract
A gas generant for an inflatable restraint device (for example, an airbag system for a vehicle) is a monolithic compressed solid that has a linear burn rate of greater than or equal to about 1.6 inches per second at a pressure of about 3,000 pounds per square inch. The gas generant can be in the form of an annular disk having a plurality of apertures. The gas generant may be substantially free of binder and may have a low initial surface area which progressively increases during burning. The gas generant provides a gas generation profile that improves restraint of vehicle occupants, including those occupants that are out-of-position. Additionally, the shaped gas generant decreases occupant exposure to toxic effluent combustion products and solid respirable particulates.
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Citations
20 Claims
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1. An inflatable restraint device comprising:
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an airbag for restraining motion of a vehicle occupant; and at least one gas generant for inflating the airbag in the form of a monolithic annular disk having a plurality of apertures and further having a linear burn rate of greater than or equal to about 1.6 inches per second at a pressure of about 3,000 pounds per square inch, wherein the at least one gas generant is substantially free of polymeric binder and produces an effluent for inflating the airbag that is substantially free of chloride-containing species - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An inflatable restraint device comprising:
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an airbag for restraining motion of a vehicle occupant; and at least one gas generant for inflating the airbag in the form of a monolithic annular disk having a plurality of apertures comprising a first aperture having a first diameter and a second aperture having a second diameter, wherein the first diameter is greater than the second diameter, wherein the at least one gas generant further has a linear burn rate of greater than or equal to about 1.6 inches per second at a pressure of about 3,000 pounds per square inch, a product of a mass density and a gas yield of the gas generant is greater than or equal to about 5.2 moles/100 cm3, and wherein the gas generant is substantially free of polymeric binder and azides, and a combustion pressure in the inflatable device is less than or equal to about 3,500 pounds per square inch and greater than about 2,000 pounds per square inch for at least 25 milliseconds. - View Dependent Claims (12, 13, 14, 15)
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- 16. A gas generant for an inflatable restraint device comprising an annular disk having a plurality of apertures, wherein a linear burn rate of the gas generant is greater than or equal to about 1.6 inches per second at a pressure of about 3,000 pounds per square inch, wherein a product of a mass density and a gas yield of the gas generant is greater than or equal to about 5.0 moles/100 cm3, and wherein the gas generant is substantially free of polymeric binder, perchlorate-containing oxidizing agents, and azides, wherein an effluent produced by the gas generant during burning is substantially free of chloride-containing species and a combustion pressure in the inflatable restraint device is less than or equal to about 3,500 pounds per square inch and greater than about 2,000 pounds per square inch for at least 25 milliseconds.
Specification