Bumper
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United States of America Patent
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Issued Date -
Mar 13, 2014
app pub date -
Sep 11, 2013
filing date -
Sep 12, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A bumper for vehicles having a high productivity and a large energy absorption amount in which the reinforcement beam is prevented from buckling. The bumper includes a reinforcement beam made of steel and support members protruding from a vehicle frame and supporting the reinforcement beam therebetween. The reinforcement beam is provided with a quenched portion provided at least over a portion where an obstacle hits the reinforcement beam. The reinforcement beam is further provided with unquenched portions next to the portion where the obstacle hits the reinforcement beam to sandwich the quenched portion. A mechanical strength of the unquenched portions is smaller than the mechanical strength of the quenched portion.
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