Truck with a hand-operatable bed

Details Truck with a hand-operatable bed Truck with a hand-operatable bed

1988-08-02

1990-07-03

Marmor, Charles A.

Land vehicles

Wheeled

Extensible

137557, 340626, 340666, 414 21, B62D 2114

Patent

active

049384937

ABSTRACT:
This invention discloses a truck with a hand-operatable bed of which the front side under surface is provided with a pair of front wheels and of which the rear side under surface is supported by a hydraulic cylinder, for lifting or lowering the bed, mounted on a pair of rear wheels by means of bearings, which is characterized by being further provided with an overload-sensing device and an alarm-raising device to be put into operation according to the sensing of the overload-sensing device. Because operators can be told about an overload immediately by the devices, they do not have to keep a plunge pump working without being aware of an overload applied on the cylinder as did before. What is more, as they can realize whether the cause of not feeding oil to the cylinder has come from troubles in pressure lines or an overload, they can take measures against the cause at their earliest possible, with the result that the safety and the operatability in handling the truck are improved greatly.

REFERENCES:
patent: 3205909 (1965-09-01), Oldfield
patent: 4423751 (1984-01-01), Roettgen
patent: 4497501 (1985-02-01), Kedem
patent: 4533908 (1985-08-01), Fujikawa

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