With vacuum cup lifters, you will find that the same principles apply to all lifters. All vacuum lifters should be able to lift and move loads. Electric vacuum lifters should also be able to safely drop loads without causing any damage. The vacuum on the lifter is what supports the object during the lift. Vacuuming the suction cups is easy. The pump draws a vacuum between the suction cup and the part to be lifted and stores this vacuum in a chamber created for this purpose. By creating a vacuum, the atmospheric pressure in the suction cup housing is eliminated.