Airbag generant wafer design with I-beam construction

• US 6,053,110 A
• Filed: 01/16/1998
• Issued: 04/25/2000
• Est. Priority Date: 01/16/1998
• Status: Expired due to Fees

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Hussey, Brett, Marchant, Brent R.
• Primary Examiner(s): Nelson, Peter A.
• Application Number:
  US09/008,002
• Time in Patent Office: 830 Days
• Field of Search: 102/288, 102/289
• US Class Current: 102/288
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder
• CPC Class Codes: C06B 45/00 Compositions or products which are defined by structure or arrangement of component of product explosive charges of particular form or shape F42B1/00, F42B3/00
• CPC Class Codes: F42B 5/16 characterised by composition or physical dimensions or form of propellant charge, with or without projectile, or powder chemical composition C06B; F42B5/24 takes precedence

Abstract

A gas generant wafer design having a channel region integrally formed into one or both of its sides or faces. Characteristic of the wafer is that the geometric design of the wafer is improved by increasing its cross-section in the same manner that an "I-Beam" increases the structural characteristic of a linear structural member.

Claims

1. A gas generant body of gas releasing material in the form of a disc having inner and outer edges and with top and bottom surfaces extending between said inner and outer edges, said top and bottom surfaces having a channel formed therein, wherein said channel is aligned to said top and bottom and is of such a dimension in said top and bottom surfaces that it creates an I-beam structure in cross section thereby increasing the structural characteristics of said body.

2. The gas generant body of claim 1 wherein the disc is in the form of a washer.

3. The gas generant body of claim 2 wherein the disc is circular and the channel formed therein is concentric with said inner and outer edges.

4. The gas generant body of claim 3 wherein the gas releasing material is an azide.

7. The gas generant body of claim 3 wherein said channel has a constant cross section.

8. The gas generant body of claim 3 wherein said channel has a nonlinear cross section.

16. A wafer body according to claim 4 wherein the gas releasing material is an azide.

5. A gas generant body of gas releasing material in the form of a disc having inner and outer edges and with top and bottom surfaces extending between said inner and outer edges, at least one of said top and bottom surfaces having a channel formed therein wherein said channel is aligned to said top and bottom and is of such a dimension in said top and bottom surfaces that it creates an I-beam structure in cross section thereby increasing the structural characteristics of said body and wherein said channel has a V-shaped cross section.

6. A solid wafer body for gas generators formed of a gas releasing material said wafer comprising an interior portion with top and bottom surfaces and a continuous outer rim or boundary portion surrounding said interior portion, said interior portion having a continuous channel formed in at least one of its top and bottom surfaces wherein said channel is aligned to said top and bottom and is of such a dimension in said top and bottom surfaces that it creates an I-beam structure in cross section thereby increasing the structural characteristics of said body and wherein said channel has a V-shaped cross section.

9. A solid wafer body for gas generators formed of a gas releasing material, said wafer comprising an interior portion with top and bottom surfaces and a continuous outer rim or boundary portion surrounding said interior portion, said interior portion having a continuous channel formed in its top and bottom surfaces wherein said channel is aligned to said top and bottom and is of such a dimension in said top and bottom surfaces that it creates an I-beam structure in cross section thereby increasing the structural characteristics of said body.

10. A wafer body according to claim 9 wherein said wafer includes a central, axially symmetrical opening extending therethrougn and said continuous channel is arranged between said central opening and said outer rim of said wafer.

11. A wafer body according to claim 9 wherein the wafer is disc shaped and said channel is annular.

12. A wafer body according to claim 11 wherein there is a like number of annular channels on the top and bottom surfaces of said wafer.

13. A wafer body according to claim 11 wherein said annular channels on the top and bottom are aligned.

14. A wafer body according to claim 11 wherein said annular channels on the top and bottom are offset.

15. A wafer body according to claim 11 wherein the number of said channels on the top and bottom are different.