Energy absorption apparatus
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United States of America Patent
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Sep 22, 2015
Grant Date -
Sep 27, 2012
app pub date -
Mar 21, 2012
filing date -
Mar 22, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A guardrail or other energy absorbing apparatus includes a plurality of terminal end rails extending longitudinally extend between a plurality of support posts, wherein a first four of said plurality of rails (labelled 1-4 below) situated at a terminal end of a guardrail, or impact end of an energy absorbing apparatus; are connected to one another at respective downstream and upstream ends via: an impact slider assembly joined to a downstream portion of terminal rail 1, and surrounding a downstream portion of terminal rail 1 and an upstream portion of an adjacent rail 2; a first set of frangible bolts which are the sole bolts connecting rail 2 and adjacent rail 3 together; and a second set of frangible bolts which connect rail 3 and adjacent rail 4 together, wherein at least one standard post bolt connects the rails 3 and 4 to a post at this joint.
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