Escalator with step levelers

Details Escalator with step levelers Escalator with step levelers

1976-12-23

1979-11-27

Reeves, Robert B.

Conveyors: power-driven

Conveyor system for arranging or rearranging stream of items

By laterally or vertically moving successive items in...

104248, B66B 912

Patent

active

041756525

ABSTRACT:
An escalator comprising steps linked in an endless belt, front wheels and rear wheels for each of the steps supporting the step through a front shaft and a rear shaft respectively, guide rails for guiding the rolling movement of the front and rear wheels respectively, and projections extending axially of the rear shaft for each of the steps and projection upthrust rails mounted in a rear wheel portion of each of the steps, each of the projection upthrust rails being arranged in a manner to be juxtaposed against one of the projections and adapted to be brought into engagement with the projection to prevent an inadvertent pivotal upward movement of the step when this tendency occurs, whereby the accident of the shoes of passengers and other objects being caught in a riser portion of the step due to an inadvertent pivotal upward movement of the step can be avoided.

REFERENCES:
patent: 570746 (1896-11-01), Curtis et al.
patent: 805214 (1905-11-01), Lowry et al.
patent: 1197260 (1916-09-01), Brown
patent: 2254607 (1941-09-01), Guerrero
patent: 2686585 (1954-08-01), Margles et al.

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