Hydraulic tailgate extension, bumper and lock
AssigneeWilson Trailer Company
InventorMichael L. Chan
Life of this patent
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Abstract
A hydraulically operated tailgate associated with a low bed, semi-trailer vehicle has a pivoted extension that is displaceable between an extended position coplanar with the ramp surface of the tailgate and a bumper position transverse to and underlying the ramp surface. A hydraulic actuating mechanism displacing the extension to the bumper position, simultaneously locks the tailgate mechanically to the frame of the semi-trailer vehicle.
Claims8
For use with a vehicle having a frame supporting a substantially planar bed, and a tailgate pivotally connected to the frame having a ramp surface and a rear end face transverse to the ramp surface, a tailgate extension having a load surface portion, means pivotally connecting the tailgate extension to the tailgate portion is coplanar with the ramp surface in protective relation to the rear end face and a bumper position in which the load surface portion is spaced below the rear end face transverse to the ramp surface, power operated means for displacing the tailgate extension between said extended and bumper positions, including lock means rendered operative to mechanically lock the tailgate to the frame, and means connected to the power operated means for rendering the lock means operative in the bumper position of the tailgate extension.
For use with a vehicle having a frame supporting a substantially planar bed, and a tailgate pivotally connected to the frame having a ramp surface and a rear end face transverse to the ramp surface, a tailgate extension having a load surface portion, means operatively connecting the tailgate extension to the tailgate for displacement between an extended position in which the load surface portion is coplanar with the ramp surface in protective relation to the rear end face and a bumper position in which the load surface portion is spaced below the rear end face transverse to the ramp surface, and means mechanically locking the tailgate to the vehicle frame in the bumper position of the tailgate extension for holding the ramp surface coplanar with the bed.
For use with a vehicle having a frame, a tailgate pivotally connected thereto and an extension pivotally connected to the tailgate, said frame and tailgate respectively mounting bed and ramp surfaces, the improvement residing in means for releasably locking the tailgate to the frame in a travel condition with said bed and ramp surfaces substantially coplanar, means for displacing the tailgate to an inclined loading position with the extension coplanar with the ramp surface, and means for holding the extension in a bumper position transverse to the ramp surface in the travel condition of the tailgate.
Dependencies are inferred from the claim text.