US 10,906,781 B2Granted

Pneumatic vertical transportation device

AssigneeNational Taiwan Normal University

InventorsJung-Hsuan Chen, Chin-Guo Kuo, Chao-Fu Shu

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Abstract

A pneumatic vertical transportation device comprises an expandable cylinder, a carriage rack, an air piping controller, and an air exhauster. The expandable cylinder includes a bellow body, with one end hanging carriage rack and the other end connected with a fixing plate. The expandable cylinder is connected with the air piping controller. While the carriage rack is rising, the air exhauster draws air from the bellow body through the air piping controller to gradually decrease pressure inside. Once pressure difference exceeds weight of the carriage rack, the carriage rack begins to rise. Volume of the expandable cylinder is reduced such that the lower disc of the expandable cylinder approaches top, and the expandable cylinder is maintained at low pressure state. While the carriage rack is descending, air is fed into the expandable cylinder through the air piping controller to gradually expand the bellow body, letting the carriage rack descend.

Claims10

Dependent claims

A pneumatic vertical transportation device comprising

an expandable cylinder including an upper disc, a lower disc and a bellow body, wherein said upper disc and said lower disc are respectively arranged on an upper end and a lower end of said bellow body;
a flexible air-impermeable material is connected with said upper disc and said lower disc to form said bellow body which is expandable;
a carriage rack hanged to a bottom of said bellow body of said expandable cylinder;
an air piping controller connected with said bellow body by an air pipe and controlling pressure inside said bellow body;
an air exhauster connected with said air piping controller, wherein while said air exhauster draws air from said bellow body, a pressure difference between interior and exterior of said bellow body drives said carriage rack to rise;
while said air exhauster stops drawing air and said air piping controller feeds air into said bellow body instead, said pressure difference between said interior and said exterior of said bellow body allows said carriage rack to descend.

3 more elements

Dependencies are inferred from the claim text.