A lifter is constructed to include a hollow main upright, a frame pivoted to the main upright to carry a hand winch, a link coupled between the frame and the main upright, a hollow auxiliary upright axially movably mounted in the hollow main upright, a lifting upright axially movably mounted in the hollow auxiliary upright, two first pulley blocks coupled between the hand winch and the hollow auxiliary upright and adapted to lift the hollow auxiliary upright upon operation of the hand winch, and two second pulley blocks coupled between the hollow main upright and the lifting upright and adapted to lift the lifting upright upon operation of the hand winch after the hollow auxiliary upright has been extended out of the hollow main upright.
A synchronous actuator comprises a telescopic cylinder assembly having at least three pivotally connected cylinders, a drive assembly and a driven assembly. The drive assembly is connected to two adjacent cylinders. The driven assembly is connected to three adjacent cylinders. With the drive assembly and the driven assembly, the cylinders of the telescopic cylinder assembly can be extended or retracted synchronously in axial direction.
A device for lifting and supporting a cabinet during installation thereof and including elongated support legs and elongated dowels connected to the support legs for preventing the movement of the support legs and for maintaining the device at a substantially stable positioned during operating conditions. Side panels are secured to the upper end of the support legs for defining a cavity therebetween, and a moveable section is disposed substantially medially of the side panels. There is a pulley mechanism for selectively lifting the movable section in a substantially vertical direction between raised and lowered positions that is disposed within the cavity and is anchored to the moveable section and the side panels.
