Escalator

Details Escalator Escalator

1985-04-18

1987-07-21

Valenza, Joseph E.

Conveyors: power-driven

Conveyor or accessory therefor specialized to convey people

By stairway having steps forming an endless member

198321, B65G 912

Patent

active

046812075

ABSTRACT:
An escalator comprising four kinds of steps is disclosed. The first steps are ordinary steps, and the second step is disposed between the first steps and has a retractable support device for supporting a vertically movable step of the third step. The movable step supported by the support device lifts from the third step as the steps ascend to provide a deeper effective tread together with the tread of the second step. The fourth step includes a drop-down step which can be moved into a sloped position which also provides a space for safely accommodating a wheelchair or the like on the deep effective tread thus provided by the second, third, and fourth steps.

REFERENCES:
patent: 4326622 (1982-04-01), Ellzey
patent: 4557369 (1985-12-01), Ishida et al.
patent: 4569433 (1986-02-01), Ishida et al.
"Escalator Modification for the Handicapped", U.S. Department of Commerce, National Technical Information Service, Jul. 1980.

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