Energy absorber with lobes providing uniform pedestrian impact
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United States of America Patent
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-
Jun 12, 2012
Grant Date -
May 12, 2011
app pub date -
Nov 5, 2010
filing date -
Nov 6, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A bumper system includes an injection molded energy absorber of polymeric material having hollow longitudinally-spaced lobes configured to crush and absorb energy during a pedestrian impact, and straps interconnecting adjacent lobes. The lobes are particularly sized and dimensioned, including potentially external ribs and/or apertures in corners, to provide a relatively uniform impact energy absorption during an impact stroke during crush of the shear walls of the lobes, such as within +/−30% or more preferably within +/−20% of a desired amount regardless of a specific location of impact, along a selected center portion of the energy absorber. A reason for the uniformity is to promote pedestrian safety regardless of the specific location where a pedestrian's leg strikes the energy absorber.
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