Roller-track systems for telescopic doors on elevators

Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support

Patent

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Details

49120, B66B 1300

Patent

active

052657027

ABSTRACT:
The device is applicable to elevator telescopic two-speed doors, using either two panels with opening towards one side or else using four panels with opening in the center. The rolling device comprises linear ball bearings mounted on a single circular track which together provide a sliding apparatus for the doors. The rolling device further comprises a case for enclosing the sliding apparatus to minimize the intrusion of foreign objects such as dirt and dust.

REFERENCES:
patent: 1966182 (1934-07-01), McCormick

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