Moving handrail drive

Details Moving handrail drive Moving handrail drive

1993-09-14

1994-05-03

Dayoan, D. Glenn

Conveyors: power-driven

Conveyor or accessory therefor specialized to convey people

Moving hand-support structure

198814, 198833, B66B 2304

Patent

active

053079205

ABSTRACT:
An escalator handrail drive system includes a powered drive belt which engages the underneath surface of the handrail along the return path of travel of the latter. A series of pressure rollers engage the outer surface of the handrail to press the latter against the drive belt. The pressure rollers are all biased against the handrail by a single spring. The drive belt is pretensioned by an adjustable pretension spring assembly which can apply a fixed pretensioning force to the drive belt which will not substantially change irrespective of whether the handrail is being driven in the "up" direction or in the "down" direction on the escalator.

REFERENCES:
patent: Re25531 (1964-03-01), Fabula
patent: 2102248 (1937-12-01), Yeakel
patent: 2677456 (1954-05-01), McCann
patent: 2764031 (1956-09-01), Nystrom
patent: 3749224 (1973-07-01), Engeler
patent: 4134883 (1979-01-01), Mendelsohn et al.
patent: 4200177 (1980-04-01), Sato et al.
patent: 4895240 (1990-01-01), Bruehl et al.
patent: 5117960 (1992-06-01), Ahls et al.

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