Safety gas bag structure

• US 3,879,056 A
• Filed: 02/21/1973
• Issued: 04/22/1975
• Est. Priority Date: 02/21/1972
• Status: Expired due to Term

• Current Assignee: Akio Tange, Choji Nozaki, Seiichi Yamamoto, Takashi Baba, Takayoshi Kawashima, Toshihiko Sakai, Yutaka Kondo
• Original Assignee: Akio Tange, Choji Nozaki, Seiichi Yamamoto, Takashi Baba, Takayoshi Kawashima, Toshihiko Sakai, Yutaka Kondo
• Inventors: Baba, Takashi, Kondo, Yutaka, Nozaki, Choji, Kawashima, Takayoshi, Tange, Akio, Yamamoto, Seiichi, Sakai, Toshihiko
• Primary Examiner(s): Betts, Kenneth H.
• Application Number:
  US05/334,407
• Time in Patent Office: 790 Days
• Field of Search: 280/15AB 188/1C 244/138R 293/71R,71P 244/151R
• US Class Current: 280/743.2
• CPC Class Codes: B60R 2021/23382 Internal tether means
• CPC Class Codes: B60R 2021/23386 External tether means
• CPC Class Codes: B60R 2021/23576 Sewing
• CPC Class Codes: B60R 2021/23595 Sealing
• CPC Class Codes: B60R 21/233 comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other B60R21/232 takes precedence
• CPC Class Codes: B60R 21/2338 Tethers
• CPC Class Codes: B60R 21/2342 Tear seams

Abstract

A gas bag of high safety, responsibility and stability for attachment to a high speed moving vehicle, comprising a hollow bag body, a gas introducing hole means, and at least one restraining member provided in the hollow bag body for restraining the free deformation of said hollow bag body upon the pressing of the occupant thereagainst in the inflated condition, said restraining member having at least one breaking part which is broken when a predetermined tensile force is applied to the restraining member, whereby, when the occupant presses said inflated bag body in the sudden stop of the moving apparatus, at least one breaking part is broken and a rebounding force of the bag body against the occupant can be remarkably reduced.

Claims

1. A gas bag employed for a gas bag device which is attached to a high speed moving apparatus such as an automobile and the like in the folded condition, and into which high pressure gas is introduced to be packed in order to protect occupants of said high speed moving apparatus by detecting the sudden stop of said moving apparatus, said gas bag comprising a hollow bag body formed of sheet material having substantially no air permeability and elasticity, a gas introducing hole means provided at a portion of said hollow bag body connecting with a high pressure gas supplying source and at least one relatively thin, narrow restraining member provided in said hollow bag body for restraining a free deformation of said hollow bag body inn the inflated condition, due to the pressing of the occupant, breakable means forming a part of said restraining member, said last named means breaking when the tensile force applied to said restraining member becomes larger than a predetermined value due to the pressing of the occupant, which value is less than the value required to rupture the body, whereby when said occupant presses said inflated bag body in the sudden stop of said moving apparatus, said breakable means is broken permitting further deformation of the bag body and the rebounding force of said bag body against said occupant is remarkably reduced.

2. A gas bag according to claim 1, wherein said hollow bag body is formed into a cubic shape.

3. A gas bag according to claim 1, wherein said hollow bag body is formed into a cylindrical shape.

4. A gas bag according to claim 1, wherein said hollow bag body is formed into an elliptical shape.

5. A gas bag according to claim 1, wherein said hollow bag body is formed into a spherical shape.

6. A gas bag according to claim 1, wherein said restraining member is provided within said hollow bag body in such a manner that both end portions of said restraining member are respectively fixed to a wall surface of said hollow bag body and another wall surface opposing thereto, the length of said restraining member being formed to be shorter than the distance between said wall surfaces opposing against each other in the free inflated condition of said hollow bag body.

7. A gas body according to claim 1, wherein said restraining member is equipped around the surface of said hollow bag body in such a manner that said restraining member is shaped as a ring-like band along a wall surfce of said hollow bag body. the total length of said restraining member along said hollow bag body being formed to be shorter than the length of external circumference of said hollow bag body in free inflated condition.

8. A gas bag according to claim 6, wherein said restraining member is made of filament woven fabrics which is designed to have a predetermined value in the tensile strength.

9. A gas bag according to claim 6, wherein said restraining member is formed of a line shape member which is designed to have a predetermined value in the tensile strength.

10. A gas bag according to claim 6, wherein said restraining member is made of a macro molecular film which is designed to have a predetermined value in the tensile strength.

11. A gas bag according to claim 6, wherein said restraining member is made of an inorganic fiber which is designed to have a predetermined value in the tensile strength.

12. A gas bag accorDing to claim 7, wherein said restraining member is made of filament woven fabrics which is designed to have a predetermined value in the tensile strength.

13. A gas bag according to claim 7, wherein said restraining member is formed of a line shape member which is designed to have a predetermined value in the tensile strength.

14. A gas bag according to claim 7, wherein said restraining member is made of a macro molecular film which is designed to have a predetermined value in the tensile strength.

15. A gas bag according to claim 7, wherein said restraining member is made of an inorganic fiber which is designed to have a predetermined value in the tensile strength.

16. A bas bag according to claim 8, wherein said hollow bag nody is formed into a cubic shape and said breaking part is formed by folding a nearly central part of said restraining member in its longitudinal direction, and sewing the adjacent parts of folded part together with thread to form the plural rows of stitches in the transverse direction thereof.

17. A gas bag according to claim 8, wherein said hollow bag body is formed into a cubic shape, and said breaking part is formed by facing two separated bent end portions of a nearly central part of said restraining member in its longitudinal direction and sewing together the adjacent facing parts with thread to form the plural rows of stitches in the transverse direction thereof.

18. a gas bag according to claim 8, wherein said hollow bag body is formed into a cubic shape, and said breaking part is formed by superposing each central portion of one pair of restraining members in the longitudinal direction and sewing together the adjacent superposed parts with thread to form the plural rows of stitches in the transverse direction thereof.

19. A gas bag according to claim 8, wherein said hollow bag body is formed into a cylindrical shape, and said breaking part is formed by facing each separated end portion of a nearly central portion of said two restraining members in the longitudinal direction and sewing together the adjacent facing parts with thread to form the plurl rows of stitches in the longitudinal direction thereof.

20. A gas bag according to claim 16, wherein said hollow bag body is made of nylon filament woven fabrics and one pair of the strip type restraining members are provided by sewing each end portion of said restraining members and mutually opposed wall surfaces of said hollow bag body together in such a manner that the transverse direction of said restraining member coincides with the pressing direction of said occupant to said hollow bag body.

21. A gas bag according to claim 17, wherein said hollow bag body is made of nylon filament woven fabrics and one pair of the strip type restraining members are provided by sewing end portions of said restraining members and the opposed wall surfaces of said hollow bag body together in such a manner that the transverse direction of said restraining member coincides with the pressing direction of said occupant to said hollow bag body.

22. A gas bag according to claim 17, wherein said hollow bag body is made of nylon filament woven fabrics and one pair of the strip type restraining members are provided by sewing end portions of said restraining members and the opposed wall surfaces of said hollow bag body together in such a manner that the thickness direction of said restraining members coincides with the pressing direction of said occupant to said hollow bag body.

23. A gas body according to claim 17, wherein said hollow bag body is made of nylon filament woven fabrics and one pair of the strip type restraining members are provided by sewing end portions of said restraining members and the top and bottom surfaces of said hollow bag body together in such a manner that the transverse direction of said restraining member coincides with the pressing direction of said occupant to said hollow bag body.

24. A gas bag according to claim 18, wherein said hollow bag body is made of nylon filament woven fabrics, and one pair of the strip type restraining members are provided by sewing end portions of said restraining members and the opposed wall surfaces of said hollow bag body together in such a manner that the transverse direction of said restraining members coincides with the pressing direction of said occupannt to said hollow bag body.

25. A gas bag according to claim 19, wherein said hollow bag body is made of nylon filament woven fabrics, and one pair of the strip type restraining members ar provided at right angles by sewing each end portion of said restraining members and the opposed wall surfaces of said hollow bag body together in such a manner that the thickness direction of said restraining members coincides with the pressing direction of said occupant to said hollow bag body.

26. A gas bag according to claim 9, wherein said hollow bag body is made of nylon filament woven fabrics, and four pair of said line shape members are radially provided by adhering each end portion of said restraining members to the mutually opposed wall surfaces of said hollow bag body in such a manner that the plane of said line shape members is vertical to the pressing direction of said occupant to said hollow bag body.

27. A gas bag according to claim 12, wherein said hollow bag body is formed into a cubic shape, and said breaking parts of said restraining members are formed by facing each end part of said restraining members in their longitudinal direction and sewing together the adjacent folded parts with thread to form the plural rows of stitches in the transverse direction thereof.

28. A gas bag according to claim 12, wherein said hollow bag body is formed into a cylindrical shape, and said breaking parts of said restraining members are formed by folding each end parts of said restraining members in their longitudinal direction and sewing together the adjacent folded parts with thread to form the plural rows of stitches in the transverse direction thereof.

29. A gas bag according to claim 27, wherein said hollow bag body is made of nylon filament woven fabrics and strip type restraining means are provided around said hollow bag body by sewing each end portion of said restraining member in such a manner that the transverse direction of said restraining members is parallel to the pressing direction of said occupant to said hollow bag body.