Energy absorbing device having notches and pre-bent sections

Details Energy absorbing device having notches and pre-bent sections Energy absorbing device having notches and pre-bent sections

B - Operations, Transporting

60

R

B60R 19/34 (2006.01) B62D 21/15 (2006.01)

Patent

CA 2561397

According to one embodiment of the invention, an energy-absorbing device (100, 200, 300, 400) includes a section of material having a plurality of crush zones along a longitudinal length thereof, a first crush zone of the plurality of crush zones including a pair of opposed first bends (104, 204, 304, 404) formed in a first side and a second side of the section, a pair of opposed second bends (108) formed in a third side and a fourth side of the section, and a first set of notches spaced around a perimeter of the section at a longitudinal location corresponding to the first bends and second bends. The first bends project in a direction that is one of inward and outward and the second bends project in a direction opposite that of the first bends. At least one of the other crush zones includes a second set of notches (112) spaced around the perimeter of the section.

Dans une forme de réalisation, l'invention concerne un dispositif d'amortissement qui comprend une partie de matière comportant une pluralité de zones d'écrasement sur une étendue longitudinale de celle-ci. Une première zone d'écrasement de la pluralité desdites zones comprend deux premiers plis opposés, formés dans un premier et un second côté de la partie, deux seconds plis opposés, formés dans un troisième et un quatrième côté de la partie, et un premier ensemble d'encoches espacées sur le pourtour de ladite partie, en un point longitudinal correspondant aux premiers et seconds plis. Les premiers plis font saillie dans une direction, soit vers l'intérieur soit vers l'extérieur, et les seconds plis font saillie dans la direction opposée à celle des premiers plis. Au moins une des autres zones d'écrasement comprend un second ensemble d'encoches espacées sur le pourtour de la partie.

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