Air bag provided with reinforcing belts

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 21/16 (2006.01)

Patent

CA 2123424

An air bag having reinforcing belts and exhibiting a high burst strength and excellent safety, comprises a circular top cloth, a circular bottom cloth seam-joined to the top cloth and having an inflator-joining circular hole located in the center portion thereof, top and bottom reinforcing cloths seam-joined to center portions of the top and bottom cloths, and a plurality of reinforcing belts located on inside faces of the top and bottom cloths, in which air bag an end portion of each reinforcing belt is connected to the top reinforcing cloth or a top belt catcher seam-joined to the top cloth, the opposite end portion of the reinforcing belt is connected to the bottom reinforcing cloth or a bottom belt catcher seam-joined to the bottom cloth, and each of the top and bottom cloths is seam-joined to a corresponding reinforcing cloth and optionally a corresponding belt catcher by a plurality of concentrically closed seam lines satisfying the relationship (I): 0.45 ~ .PHI./L ~ 2.95 (I) In (I) .PHI. is the shortest straight line distance between two intersecting points of an outermost circumferential seam line with a straight line extending through a center of the circular top or bottom cloth, and L is a straight line distance between an intersecting point of a longitudinal center line of a reinforcing belt with the outermost circumferential seam line of the top reinforcing cloth and an intersecting point of the longitudinal center line with the outermost circumferential seam line of the bottom reinforcing cloth.

Un coussin d'air type air bag, doté de sangles de renforcement et présentant une grande résistance à l'éclatement ainsi qu'une sécurité supérieure, comprend un tissu circulaire supérieur (1), un tissu circulaire inférieur (2) cousu à ce dernier et muni d'un orifice circulaire permettant de monter un gonfleur dans sa partie centrale, des tissus de renforcement supérieur et inférieur (5, 6) cousus sur les parties centrales des tissus supérieur et inférieur respectivement, ainsi que plusieurs sangles de renforcement (7) disposées sur les côtés de ces dernières. Une des extrémités de ces sangles de renforcement est raccordée à un fixe-sangles supérieur (17) ou sur le tissu supérieur, et l'autre extrémité de ces sangles est raccordée à un fixe-bride inférieur (18) cousu sur le tissu de renforcement inférieur ou sur le tissu inférieur. Les tissus supérieur et inférieur sont cousus chacun sur leur tissu de renforcement correspondant et, si nécessaire, sur leur fixe-bride correspondant le long d'une couture circulaire concentrique de façon à satisfaire la relation 0,45 PHI/L 2.95 (où PHI représente la plus courte ligne droite entre deux points d'intersection où une ligne passant par le centre du tissu circulaire supérieur ou inférieur coupe la circonférence la plus grande représentée par la couture, et L représente la distance droite reliant un point d'intersection, entre l'axe central longitudinal de la sangle de renforcement et la plus longue couture circulaire du tissu de renforcement supérieur, à un point d'intersection placé entre l'axe central longitudinal de la sangle de renforcement et la plus longue couture circulaire du tissu de renforcement inférieur.

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