Patent ID: 7857343

Claim:
A vehicle trailer comprising: (a) a rear deck; (b) a forward deck having a second end; (c) a central deck having a front end and a rear end, wherein the rear end is attached to the rear deck to form a rigid unitary structure; and (d) a pair of pivotable altitude adjustment mechanisms connecting the front end of the central deck to the second end of the forward deck, wherein each altitude adjustment mechanism includes a first rear pivot plate having a pivot hole and a first position locking pin hole and a second position locking pin hole. the first rear pivot plate mounted on a corner of the front end of the central deck parallel to and offset a longitudinal midplane of the trailer, a second rear pivot plate having a pivot hole and a first position locking pin hole and a second position locking pin hole. the second rear pivot plate mounted on the front end of the central deck parallel to the first rear pivot plate and offset from the first rear pivot plate towards the longitudinal midplane of the trailer. a forward pivot plate having a pivot hole and a first position locking pin hole and a second position locking pin hole. the forward pivot plate mounted on the second end of the forward deck and positioned between the first and second rear pivot plates to coaxially align the pivot hole of the forward pivot plate with the pivot holes of the first and second rear pivot plates, and a pivot pin connecting the coaxially aligned pivot holes of the forward pivot plate and the first and second rear pivot plates; (e) an adjustment means for moving the front end of the central deck to an up position or a down position, wherein the up position coaxially aliens the first locking pins holes of the forward pivot plate and the first and second rear pivot plates and the down position coaxially aligns the second locking pins holes of the forward pivot plate and the first and second rear pivot plates; and (f) a selectable engageable position locking pin connecting coaxially aligned locking pin holes to lock the front end of the central deck in either the up position or the down position.