Abstract: An illuminative jack includes a lighting device disposed in a top plate and connected to a switch. When the user switches on the switch, the lighting device will be radiated by the power supplied by a power source, thus providing an illumination effect.

Abstract: A jack includes a base provided with a plurality of catch blocks, a lift arm pivotable relative to the base, and a safety member pivotally mounted on the lift arm to move therewith. Thus, when the lift arm is lifted, the first end of the safety member is locked on either one of the catch blocks of the base, so that the safety member is fixed by the base during upward movement of the lift arm so as to fix the lift arm, thereby preventing the lift arm from being lowered too quickly when the power supplied to the lift arm disappears accidentally due to malfunction so as to provide a safety effect.

Abstract: A jack includes a base provided with a plurality of catch blocks, a lift arm pivotable relative to the base, and a safety member pivotally mounted on the lift arm to move therewith. Thus, when the lift arm is lifted, the first end of the safety member is locked on either one of the catch blocks of the base, so that the safety member is fixed by the base during upward movement of the lift arm so as to fix the lift arm, thereby preventing the lift arm from being lowered too quickly when the power supplied to the lift arm disappears accidentally due to malfunction so as to provide a safety effect.

Abstract: A hydraulic jack device has a pump, a handle, a hydraulic cylinder, a rocking arm, and a lifting seat. A hydraulic shaft is inserted through the hydraulic cylinder and connected to the rocking arm. The rocking arm is connected to the lifting seat. The pump has a main body connected to the hydraulic cylinder, a chamber formed in the main body, a piston cylinder, a piston, and a C-shaped ring. The driven rod has a round end and a hollow box end. The driven rod passes through the piston cylinder, a coiled spring, and the piston. The round end of the driven rod is inserted in the chamber. A first and a second oil channels are formed in the hydraulic cylinder.