Material or article handling – Self-loading or unloading vehicles – Having elevating load body
Patent
1991-06-13
1993-07-06
Huppert, Michael S.
Material or article handling
Self-loading or unloading vehicles
Having elevating load body
414476, 414786, 2804141, 114344, B60P 310
Patent
active
052248143
ABSTRACT:
A catamaran trailer on a wheeled chassis supporting a lifting mechanism comprising two pairs of pivotable lifting arms spaced apart from one another at front and rear portions of the chassis. Each of a pair of lifting arms is integrally formed in a U-shaped construction with one of forward and rear shafts, with the shafts being connected in the preferred embodiment, by an arrangement of sprocket wheels and a chain. An operating handle attached at one end to the forward shaft causes it to rotate when the handle is raised or lowered. The sprocket wheels and chain transfer the rotational motion to the rear shaft such that front and rear lifting arms are raised and lowered simultaneously, to lower or lift the catamaran. The design enables lowering of the lifting arms below the top of the frame, which may be slid under low-profile catamarans, while maintaining a constant lifting force during operation regardless of the lifting arm angle. The free end of each lifting arm is provided with a support lug shaped to engage an edge of the catamaran from the underside, making it slidable on the lifting arms and support lugs, so that after it is raised, it can be balanced on the trailer without interfering with its structure. The operating handle is provided with sufficient length to increase the mechanical advantage of the lifting mechanism and reduce the physical exertion required, so that a single user is capable of loading and unloading the catamaran easily and quickly. The operating handle is detachable to avoid interference with the cables supporting the catamaran mast, enabling sliding of the trailer in relation to the catamaran for unloading and loading without removing the mast.
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Eller Jr. James T.
Huppert Michael S.
Langer Edward
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