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US 4,784,545 AGranted
Dual load trailer
OwnerDennis G. Lawrenceinventor
Life of this patent
Estimating the term…
Abstract
A dual load trailer having upper and lower decks pivotally attached to each other by pivot arms, which are biased by means of torsion bar assemblies to apply a downward force upon the upper deck when the upper deck is in a fully raised position, and an upward force when the upper deck is in a fully lowered position. A slideable wheel carriage assembly is provided to facilitate tongue weight adjustment and access to the doors of vehicles transported on the lower deck.
Claims8
A double load highway trailer comprising:
- a lower perimeter frame generally defining a horizontal rectangle having one axis parallel to the line of travel of the trailer;
- a wheel carriage assembly slidably attached to the lower perimeter frame;
- axle means attached to the wheel carriage assembly;
- a plurality of road wheels mounted in pairs to the axle means;
- means for sliding the wheel carriage assembly forward and back relative to the lower perimeter frame;
- a plurality of pivot arms in spaced relation to each other pivotally attached to the lower perimeter frame, and each movable in a substantially vertical plane parallel to the line of travel of the trailer;
- an upper perimeter frame generally defining a horizontal rectangle, in spaced, parallel relationship with the lower perimeter frame and pivotally attached to the pivot arms;
- means for translating the upper perimeter frame as the upper side of a parallelopiped defined by the pivot arms and the lower and upper perimeter frames;
- means for progressively biasing the corners of said parallelopiped toward collapse thereof when the parallelopiped is fully extended and toward extension thereof when fully collapsed;
- a trailer tongue attached to the lower perimeter frame;
- hitch means attached to the trailer tongue.
8 more elements
Dependencies are inferred from the claim text.