Retractable column

Details Retractable column Retractable column

E - Fixed Constructions

04

H

14/11, 20/111, 3

E04H 12/00 (2006.01) E04H 12/18 (2006.01)

Patent

CA 2014731

ABSTRACT OF THE DISCLOSURE A retractable support column for overhead structures that comprises there sets of rectangular shaped links that have mating hooks extending laterally outward form adjacent link chains so that the hoods can engage each other when the links are placed vertical next to each other and and can disengage each other when the lower link is rotated into a horizontal position with a drive mechanism for engaging gear racks on the link chains to permit the user to raise and lower retractable column.

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