Preparing air bag vehicle restraint device having cellulose containing sheet propellant
First Claim
1. A method for producing an air bag vehicle restraint device comprising:
- providing cellulose;
providing an oxidizing agent;
providing a vitrifying agent;
creating a sheet propellant comprised of said cellulose, said oxidizing agent, and said vitrifying agent;
providing a reaction canister that has an interior space for receiving said sheet propellant and an opening;
positioning said sheet propellant in said interior space of said reaction canister;
placing an igniter adjacent to said sheet propellant;
operatively connecting a filter to said reaction canister so that said filter is located between said opening and said sheet propellant; and
operatively attaching an air bag across said opening of said reaction canister.
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Accused Products
Abstract
The present invention provides a cellulose-based propellant for generating gas to inflate an air bag in a vehicle occupant restraint system. In one embodiment, the propellant includes cellulose in combination with an alkali nitrate oxidizer, such a potassium nitrate, and Kaolinite clay for increasing the viscosity of the residue resulting from combustion of the propellant. Also included in the present invention is a method for producing the propellant and incorporating the propellant into an air bag restraint system. In one embodiment of the method, cellulose fiber in the form of pulp board or wood pulp is soaked in a solution that includes an oxidizing agent to produce a slurry, the slurry is then formed into a sheet of a desired density, the sheet is then at least partially dried, if required, and then formed into a desired shape for incorporation into a vehicle restraint system that employs an air bag.
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Citations
20 Claims
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1. A method for producing an air bag vehicle restraint device comprising:
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providing cellulose; providing an oxidizing agent; providing a vitrifying agent; creating a sheet propellant comprised of said cellulose, said oxidizing agent, and said vitrifying agent; providing a reaction canister that has an interior space for receiving said sheet propellant and an opening; positioning said sheet propellant in said interior space of said reaction canister; placing an igniter adjacent to said sheet propellant; operatively connecting a filter to said reaction canister so that said filter is located between said opening and said sheet propellant; and operatively attaching an air bag across said opening of said reaction canister. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for producing an air bag vehicle restraint device comprising:
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providing cellulose; providing an oxidizing agent; providing a vitrifying agent; creating a sheet propellant comprised of said cellulose, said oxidizing agent and said vitrifying agent, said vitrifying agent increasing the viscosity of a residue produced during combustion of the sheet propellant; providing a reaction canister that has an interior space for receiving said sheet propellant and an opening; positioning said sheet propellant in said interior space of said reaction canister; placing an igniter adjacent to said sheet propellant; operatively connecting a filter to said reaction canister so that said filter is located between said opening and said sheet propellant; and operatively attaching an air bag across said opening of said reaction canister. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method for producing an air bag vehicle restraint device comprising:
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providing cellulose; providing an oxidizing agent; providing a vitrifying agent; creating a sheet propellant comprised of said cellulose said oxidizing agent and said vitrifying agent; providing a reaction canister that has an interior space with a tubular shape and an opening; rolling said sheet propellant to fit within said reaction canister; positioning said sheet propellant in said interior space of said reaction canister; placing an igniter adjacent to said sheet propellant; operatively connecting a filter to said reaction canister so that said filter is located between said opening and said sheet propellant; and operatively attaching an air bag across said opening of said reaction canister.
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Specification