Pneumatic elevator by depressure
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United States of America Patent
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-
Sep 5, 1995
Grant Date -
N/A
app pub date -
Dec 14, 1992
filing date -
Jan 8, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Pneumatic vacuum lift elevator, in which the vertical shaft is a tube with smooth interior surface, preferably cylindrical, with straight axle, and the transport cab or vehicle moving inside such tube is a piston with vertical movement, with minimum play inside the tube, equipped with air suction devices at the upper end of the tube, capable of causing a sufficient pressure differential to displace such piston in controlled ascending and descending movement; completed with an air entry or intake in the lower end of the tube, and the access doors with which the tube is equipped, and which are hermetically closed on the various stopping levels.
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