Escalator having yieldable primary and non-yieldable secondary t

Details Escalator having yieldable primary and non-yieldable secondary t Escalator having yieldable primary and non-yieldable secondary t

1979-02-22

1981-02-10

Nase, Jeffrey V.

Conveyors: power-driven

Conveyor or accessory therefor specialized to convey people

By stairway having steps forming an endless member

198838, 198845, B66B 912

Patent

active

042496497

ABSTRACT:
An escalator including an endless belt and a plurality of steps attached thereto. The endless belt and steps are guided about a loop which includes load bearing and return runs for the steps, by guide wheels rotatably mounted on a common side of the endless belt, and a guide track. The guide wheels and guide track cooperatively define the first and second yieldable guide points, and first and second non-yieldable guide points, which function at different levels of side thrust forces on the endless belt.

REFERENCES:
patent: 1956153 (1934-04-01), Lindquist et al.
patent: 2686585 (1954-08-01), Margles et al.
patent: 2905308 (1959-09-01), Hansen
patent: 3682289 (1972-08-01), Kraft
patent: 3834513 (1974-09-01), Miura et al.
patent: 4064986 (1977-12-01), Bertovich

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