Abstract: A pin box assembly comprising a first portion, a second portion, a connective member disposed between the first portion and the second portion, the first portion comprising a torque portion, the torque portion comprising a bar disposed within a tube and at least one resilient member disposed between the bar and the tube, the bar fixedly connected to the first portion, the tube fixedly connected to the second portion, the resilient member compressible between the bar and the tube upon rotation of the bar with respect to the tube, a connective member fixedly connected to the tube and to the second portion, and a hitch member connected to the first portion for engaging a hitch on a towing vehicle.

Abstract: A pin box assembly comprising a first portion, a second portion, a connective member disposed between the first portion and the second portion, the first portion comprising a torque portion, the torque portion comprising a bar disposed within a tube and at least one resilient member disposed between the bar and the tube, the bar fixedly connected to the first portion, the tube fixedly connected to the second portion, the resilient member compressible between the bar and the tube upon rotation of the bar with respect to the tube, a connective member fixedly connected to the tube and to the second portion, and a hitch member connected to the first portion for engaging a hitch on a towing vehicle.

Abstract: A pin box assembly comprising a towing vehicle portion comprising a frame, a towed vehicle portion comprising a frame having a proximal end and a distal end, a torsion resistant pivot portion disposed between the towing vehicle portion and the towed vehicle portion, the torsion resistant pivot portion disposed at a distal end of the towed vehicle portion, the torsion resistant pivot portion comprising, a bar disposed within a tube, the tube fixedly connected to the towing vehicle portion and the bar fixedly connected to the towed vehicle portion, at least one resilient member disposed between the bar and the tube, the resilient member compressible between the bar and the tube upon a relative rotation of the tube with respect to the bar, an air spring disposed between the towing vehicle portion and the towed vehicle portion, the air spring disposed toward the proximal end of the towed vehicle portion with respect to the distal end, and a hitch pin connected to the towing vehicle portion for engaging a hitch on

Abstract: An adjustable pin box comprising a receiver tube, a hitch connector slideably engaged with the receiver tube, the hitch connector selectably positionable at a plurality of predetermined positions within the receiver tube, a fastener for securing the hitch connector at each predetermined position within the receiver tube, a beam connected to the receiver tube in a direction that extends substantially normal to the hitch connector, a receiver beam, the beam slideably engaged with the receiver beam, the beam selectably positionable at a plurality of predetermined positions within the receiver beam, a second fastener for securing the beam at each predetermined position within the receiver beam, and means for attaching the receiver beam to a frame.

Abstract: A pin box for connecting a trailer to a tow vehicle includes a hollow receiver tube attached to a pair of support beams positioned on opposite sides of the receiver tube. A forward mounting bracket for attaching the pin box to a frame of the trailer is disposed between the two support beams. The mounting bracket is fixedly attached to both support beams. A second mounting bracket is attached to the ends of the support beams opposite the receiver tube. The pin box also includes a hitch connector that is slideably engageable with the receiver tube. The hitch connector may be positioned within the receiver tube at a plurality of discrete predetermined locations. An attaching means is provided for securing the hitch connector to the receiver tube at each of the predetermined locations. The hitch connector may be configured to include a king pin connector or a gooseneck connector. Differently configured hitch connectors may be interchangeably connected to the receiver tube.