ELEVATABLE DUMP BOX CARRIER WITH TILT FRAME AND REAR LATCH

摘要

A carrier for lifting, transporting and dumping a large load box or the like is provided including a wheeled trailer having a forwardly projecting tongue for pivotal connection to a tractor, a central longitudinal frame rigidly connected to the tongue and a rear cross member rigidly connected to the central frame member. A cross tube for journalling the trailer wheels is attached to a support arm pivotally connected at one end to one of the trailer frame members and rigidly connected at the other end to the cross tube and a first hydraulic cylinder interconnects the cross tube and another one of the trailer frame members for swinging the support arm about its pivotal connection so as to raise and lower the rear end of the trailer frame member with respect to the trailer wheels. A pair of laterally spaced jaw members are secured to the rear cross member and open rearwardly thereform to receive transverse hinge pins secured to the underside of the load box adjacent its rear end, a latch plate is pivotally secured to the structure of each of the jaws and a cylinder is provided for pivoting the latch plates to lock the transverse hinge pins in the jaws. A tilt frame is pivotally pinned to the rear cross frame about a tilt axis coaxial with the hinge pins when they are locked in the jaws by the latch plates and another hydraulic cylinder interconnects the forward end of the tilt frame for pivotally raising the tilt frame and the load box about their coaxial pivot pins whereby the forward end of the load box is elevated into dumping position.