Land vehicles – Wheeled – Extensible
Patent
1993-05-20
1994-10-11
Camby, Richard M.
Land vehicles
Wheeled
Extensible
280 4317, 254 2C, B62D 3308
Patent
active
053540808
ABSTRACT:
A low lift pallet truck so configured, in its lowered and unladen mode, that entry into and exit from double-faced pallets is made without contact of its fork wheels and the pallet's bottom boards. In this mode, support wheel assemblies fixedly mounted on each side of the truck fork frame, position the forks above their normal lowered height. Lift linkage rod assembly springs retract the fork wheels upward into the fork structure clear of the floor. Therefore with the truck's drive wheel and support wheels bearing its weight, the truck can be moved with its forks positioned above the pallet bottom boards free of interference. When the forks are properly positioned in the pallet, operator actuation of the lift function causes the truck fork frame to rise and move the lift linkage to drop the fork wheels to floor contact. Simultaneously the support wheels move upward with the fork frame and no longer carry the truck's fork end weight loadings. Lifting is stopped when the pallet is clear of the floor. The truck suspension is now in the mode common of most low lift pallet trucks. Deposit of the pallet by actuation of the truck lowering control, returns the truck to its original lowered and unladen counter-balanced configuration and exit from the pallet is made without contact with the pallet bottom boards. Driver control actions required in operation of the trucks of the embodiments of this invention are identical to those of most prior construction trucks.
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Camby Richard M.
Mattix Carla
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