Step for a curved escalator

Details Step for a curved escalator Step for a curved escalator

1987-01-20

1988-10-04

Spar, Robert J.

Conveyors: power-driven

Conveyor or accessory therefor specialized to convey people

By stairway having steps forming an endless member

198333, B66B 912

Patent

active

047750430

ABSTRACT:
A segment step is provided for a curved escalator having a plurality of segment steps connected to an endless loop of step chains having curved cleats so related in curvature that the steps circulating along the endless loop mesh properly and smoothly. Each step comprises a tread slate having formed therein a plurality of arcuate horizontal cleats and an arcuate vertical riser plate connected to the tread plate and having formed therein a plurality of vertical cleats curved similar to the riser plate. The radii of curvature of the vertical cleats and the radii of curvature of the horizontal cleats increase in the direction away from the center of curvature of the escalator according to an arithmetic progression.

REFERENCES:
patent: 3878931 (1975-04-01), Luna

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