Patent ID: 7926833
Filing Date: 2011-04-19
Classification: B62D

Abstract:
1. An all-wheel steer trailer, comprising: a substantially horizontally disposed frame having a forward end, a rearward end, a left side and a right side; a transversely extending front axle beam having first and second ends; a first wheel rotatably secured to said first end of said front axle beam; a second wheel rotatably secured to said second end of said front axle beam; a hitch secured to said front axle beam which extends forwardly therefrom for connection to a towing vehicle; said front axle beam being pivotally secured, about a vertical axis, to said frame means and the forward end thereof; a transversely extending rear axle beam, having first and second ends, pivotally secured about a vertical axis to said frame at the rearward end thereof; a third wheel rotatably secured to said first end of said rear axle beam; a fourth wheel rotatably secured to said second end of said rear axle beam; a lower horizontally disposed plate secured to said rear axle beam at the pivotal connection of said rear axle beam to said frame; an upper horizontally disposed plate secured to said frame above said lower plate; an intermediate horizontally disposed plate positioned between said lower and upper plates; an elongated tie rod having forward and rearward ends; said forward end of said tie rod being pivotally secured, about a vertical axis, to said front axle beam inwardly of said first end thereof; said rearward end of said tie rod being pivotally secured, about a vertical axis, to said intermediate plate; a vertically disposed king pin extending through said lower, intermediate and upper plates to pivotally secure said rear axle beam to said frame; and a locking assembly mounted on said rear axle beam which is selectively movable between first and second portions; said locking assembly, when in its said first position, interconnecting said rear axle beam to said intermediate plate whereby pivotal movement of said front axle beam in a first direction with respect to said frame will cause said rear axle beam to pivotally move with respect to said frame in a direction opposite to said first direction; said locking assembly when in its said second position, being disengaged from its connection to said intermediate plate and being interconnected with said upper plate to prevent pivotal movement of said rear axle beam with respect to said frame when said front axle beam is pivoted with respect to said frame; said intermediate plate having a rearward end; a pair of horizontally spaced-apart lugs mounted on said rearward end of said intermediate plate; said locking assembly has a rearward end and wherein a pair of horizontally spaced-apart lugs are mounted on said rearward end of said intermediate plate, said locking assembly including a pivotal bar; said pivotal bar of said locking assembly engaging said lugs, when said locking assembly is in its said first position to interconnect said rear axle beam to said intermediate plate.