| 摘要 |
PURPOSE:To make possible to simply and safely raise up a vehicle body, by utilizing hydraulic pressure fed from an engine-driven or motor-driven hydraulic pump in addition to manual operation. CONSTITUTION:The cylinder 8 of a jack 7 is supported to an axle by means of a holding hardware 3 attached to one end of the cylinder 8 through an inversed L-like shape sling 5 and pins 4, 6, and a screw rod 9' carrying a bed plate 11 is manually pulled out to one or two stages. Thus, the bed plate 11 is set on the ground therebelow, as a base bed. Then, a piston 9 in a cylinder 8 is pushed out by a hydraulic pressure to obtain an elevated height.
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