| 摘要 |
A hydraulic jack with a restorable lever and a retaining device includes a positioning blind hole provided on one side of a base. The blind hole holds a compression spring which acts between the base and a lever holder. A supporting post on one side of the base is provided with a pin hole for accepting a retaining pin to hold the lever holder in place. When the retaining pin is removed for operation, the stored energy of the compression spring is released so that the lever is lifted up automatically each time when it is pressed downwardly. A V-shaped spring clip connects the lever to the lever holder. A forward end of the lever is provided with a gripping hole and has two side notches, thus shaping the gripping hole to enable the lever to be used for opening and closing of a releasing valve. A foot pedal or a handle can be attached to an end of the lever for ease of operating the hydraulic jack.
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