Airbag

• US 6,168,203 B1
• Filed: 04/29/1999
• Issued: 01/02/2001
• Est. Priority Date: 05/08/1998
• Status: Active Grant

• Current Assignee: Joyson Safety Systems Japan K.K.
• Original Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Amamori, Ichiro
• Primary Examiner(s): Mai, Lanna
• Assistant Examiner(s): JASMIN, LYNDA C
• Application Number:
  US09/301,611
• Time in Patent Office: 614 Days
• Field of Search: 280/743.1, 280/728.1
• US Class Current: 280/743.1
• CPC Class Codes: B60R 21/231 characterised by their shape, construction or spatial configuration

Abstract

An airbag which is easily sewn up and which is capable of providing a large extent of thickness when inflated is formed of two pieces of panels A, B. The panels A, B are superposed on each other and sewn by a seam along sides 1, 2, 3, 11, 12, and 13 so as to make an envelope. Sides 4a, 4b are sewn by a seam 30. The open edges other than the sewn edges of the envelope are sequentially sewn by seams 50 and 60.

Claims

1. An airbag comprising first and second trapezoidal panels which are sewn together:

said first panel including a first side (2) corresponding to a top of the trapezoid, a second side (4) corresponding to a base of the trapezoid, and third and fourth sides (1) and (3) corresponding to oblique sides of the trapezoid, and having a rectangular recess (5) formed in a middle of the second side (4) and first and second protrusions (6a), (6b) protruding from portions of the third and fourth sides (1), (3) near the second side (4);

said second panel including a fifth side (12) corresponding to an upper side of the trapezoid, a sixth side (14) corresponding to a base of the trapezoid, and seventh and eighth sides (11), (13) corresponding to oblique sides of the trapezoid, and having a third protrusion (15) protruding from a middle of the sixth side (14);

said first and second protrusions (6a), (6b) of said first panel having lateral ninth and tenth sides (7a), (7b) continuously connected to the third and fourth sides (1), (3);

said second side (4) of said first panel having eleventh and twelfth sides (4a), (4b) on two sides of the rectangular recess (5);

said rectangular recess (5) having thirteenth and fourteenth sides (51), (53) continuously connected to said eleventh and twelfth sides (4a), (4b), and a fifteenth side (52) connecting said thirteenth and fourteenth sides (51) and (53);

said sixth side (14) of said second panel having sixteenth and seventeenth sides (14a), (14b) between two lateral eighteenth and nineteenth sides (15a), (15b) of the third protrusion (15) and the seventh and eighth sides (11), (13), respectively;

said first and second panels being sewn together along the third and seventh sides (1), (11), along the first and fifth sides (2), (12), and along the fourth and eighth sides (3), (13) by a first seam (20);

portions along the eleventh and twelfth sides (4a), (4b) of said first panel being sewn to each other by a second seam (30);

edges of the first and second protrusions (6a), (6b) of said first panel and an edge of the third protrusion (15) of said second panel being sewn to each other by a third seam (40);

portions along the lateral ninth side (7a) of said first panel and the eighteenth side (15a) and a portion along the sixteenth side (14a) of said second panel being sewn to each other by a fourth seam (50);

portions along the tenth side (7b) of said first panel and the nineteenth side (15b) and a portion along the seventeenth side (14b) of said second panel being sewn to each other by the fourth seam (50); and

portions along the thirteenth and fourteenth sides (51), (53) and a portion along the fifteenth side (52) of the rectangular recess (5) of said first panel being sewn to each other by a fifth seam (60).

2. The airbag as claimed in claim 1, wherein said first panel includes an opening for introducing a gas therethrough or a pair of slits for inserting an inflator therethrough in a vicinity of the rectangular recess (5) of the first panel.

3. The airbag as claimed in claim 1, wherein said airbag is for a passenger'"'"'s seat.

4. An airbag comprising first and second trapezoidal panels and which are sewn together:

said first panel including a first side (2) corresponding to a top of the trapezoid, a second side (4) corresponding to a base of the trapezoid, and third and fourth sides (1) and (3) corresponding to oblique sides of the trapezoid, and having a rectangular recess (5) formed in a middle of the second side (4);

said second panel including a fifth side (12) corresponding to an upper side of the trapezoid, a sixth side (14) corresponding to a base of the trapezoid, and seventh and eighth sides (11), (13) corresponding to oblique sides of the trapezoid, and having a protrusion (15) protruding from a middle of the sixth side (14);

said protrusion (15) having ninth and tenth sides (15a), (15b) continuously connected to the sixth side (14), and an eleventh side (15c) connecting said ninth and tenth sides (15a), (15b);

the third side (1) of the first panel having a twelfth side (1f) superposed on the seventh side (11) of the second panel and a thirteenth side (1r) extending from said twelfth side (1f);

the fourth side (3) of the first panel having a fourteenth side (3f) superposed on the eighth side (13) of the second panel and a fifteenth side (3r) extending from said fourteenth side (3f);

said second side (4) of said first panel having sixteenth and seventeenth sides (4a), (4b) on two sides of the rectangular recess (5);

said rectangular recess (5) having eighteenth and nineteenth sides (51), (53) continuously connected to said sixteenth and seventeenth sides (4a), (4b), and a twentieth side (52) connecting said eighteenth and nineteenth sides (51) and (53);

said sixth side (14) of said second panel having twenty-first and twenty-second sides (14a), (14b) between the two lateral ninth and tenth sides (15a), (15b) of the protrusion (15) and the seventh and eighth sides (11), (13), respectively;

said first and second panels being sewn together along the twelfth and seventh sides (1f), (11), along the first and fifth sides (2),(12), and along the fourteenth and eighth sides (3f), (13) by a first seam (20);

portions along the sixteenth and seventeenth sides (4a), (4b) of said first panel being sewn to each other by a second seam (30);

a portion along the ninth side (15a) of said second panel and a portion along the twenty-first side (14a) of said second panel being sewn to each other by a third seam (58);

a portion along the tenth side (15b) of said second panel and a portion along the twenty-second side (14b) of said second panel being sewn to each other by the third seam (58);

portions along the thirteenth and fifteenth sides (1r), (3r) of said first panel and a portion along the eleventh side (15c) of said second panel being sewn to each other by a fourth seam (48); and

portions along the eighteenth and nineteenth sides (51), (53) and a portion along the twentieth side (52) of the rectangular recess (5) of said first panel being sewn to each other by a fifth seam (60).