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The patented ErgoAir® seat air bladder protects vehicle occupants and reduces their potential for serious injury from high intensity shocks from mine blasts and improvised explosive devices (IEDs). Tests, using a Lansmont Shock System drop tower, were conducted at the U.S. Army Research Laboratory. These tests were conducted with a Thor NT anthropodynamic dummy sitting on an ErgoAir® seat bladder. Figure 1 shows the z-axis (vertical direction) pelvis acceleration results for a 173 g (1,697.1 m/s2) 5 ms shock input to the drop tower plate supporting the seat frame. Figure 2 shows the corresponding z-axis spine load results. Tables 1 and 2 show tabulated results associated with the related measured peak acceleration and spine load values. The maximum allowable z-axis peak acceleration and spine load values to minimize the potential for injury are 23 g's (224.6 m/s2) and 1,500 lbf, respectively. Figure 3 shows a plot of the percent reduction of peak z-axis pelvis acceleration values for the ErgoAir® seat air bladder (relative to no seat bladder) as a function of peak seat frame (plate) input acceleration. Figure 4 shows a plot of the percent reduction of peak z-axis spine load values for the ErgoAir® seat air bladder (relative to no seat bladder) as a function of peak seat frame (plate) input acceleration. |
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Figure 2 |
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Table 2
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