Principle Of Operations
The Vacuum Elevator combines a smooth vertical cylinder with a coaxial car that moves up and down through
air suction.
The roof piston gear surrounded by a sliding air tight seal allows an almost frictionless movement and hoists the car due to the pneumatic depression generated on the upper part. This provides the hoisting force, since the atmospheric pressure is higher than that inside the upper shaft.
A valve regulating inflow of air in the upper part of the shaft controls the pneumatic depression, enables descent and controls the speed of the car.
The lower part of the shaft is open to ensure free entrance of air at atmospheric pressure.  

The air suction process simply consists of a suction device that sets the difference in pressures between the atmospheric and that inside the shaft, limited by the piston, the side walls and the upper end. In this way, the portion of shaft below the piston and the interior of the car remain at atmospheric pressure.
At each floor or level, perimeter seals on the door are self-sealing due to the action of theatmospheric pressure.
The car has locking devices to stop at the upper and lower limits of travel.
A safe braking device (chute) made up by a diaphragm or piston located on the roof of the car activates in case of atmospheric pressure in the upper part of the piston.

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