Torsion bar and lift assist for pivotally mounted vehicle bumpers incorporating same
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United States of America Patent
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Dec 12, 2017
Issued Date -
N/A
app pub date -
Mar 2, 2015
filing date -
Mar 3, 2014
priority date (Note) -
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Abstract
A lift assist for a bumper pivotally mounted to a vehicle frame for movement between a normally closed upright position and a forwardly projecting open position. The bumper may be an animal protection bumper fitted to a heavy duty truck. The lift assist includes a torsion bar comprising a relatively short length of wire rope extending between first and second end fittings of the torsion bar, a first anchor assembly for securing the first end fitting to the bumper, and a second anchor assembly for securing the second end fitting to the vehicle frame. The second anchor assembly restrains rotational movement of the second end fitting when a torquing force is applied to the torsion bar, at the same time permitting contraction of the length of the wire rope when a torquing force is applied.
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