Hydraulic

A hydraulic lift is a device for moving objects using force created by pressure on a liquid inside a cylinder that moves a piston upward. Incompressible oil is pumped into the cylinder, which forces the piston upward. There are two main types of elevator systems: traction and hydraulic. Traction elevators utilize steel ropes or belts on a pulley system. Hydraulic elevators are powered by hydraulic jack, which are fluid-driven pistons that travel inside of a cylinder.