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.

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 is disclosed. 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.