| 摘要 |
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.
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