Balanced self adjustable escalator handrail drive

Details Balanced self adjustable escalator handrail drive Balanced self adjustable escalator handrail drive

1990-11-05

1991-05-28

Dayoan, D. Glenn

Conveyors: power-driven

Conveyor or accessory therefor specialized to convey people

Moving hand-support structure

B66B 2304

Patent

active

050186167

ABSTRACT:
The handrail drive utilizes one or more pairs of drive rollers which form a nip through which the handrail moves. The drive rollers are mounted on rotating drive shafts which in turn are eccentrically mounted in rotatable bearings. The drive rollers will automatically tighten on the handrail as friction increases between the rollers and handrail due to increased resistance to movement of the handrail. The rotatable bearings are connected together to ensure that each roller tightens equally on each side of the handrail so that the handrail is not bent through an S curve as it passes through the drive roller nip.

REFERENCES:
patent: 3653484 (1972-04-01), Taylor
patent: 3666075 (1972-05-01), Iwata
patent: 4134883 (1979-01-01), Mendelsohn et al.
patent: 4200177 (1980-04-01), Sato et al.
patent: 4589539 (1986-05-01), Boltrek et al.
patent: 4674619 (1987-06-01), Nakazawa et al.
patent: 4875568 (1989-10-01), Hermann et al.
patent: 4895240 (1990-01-01), Bruehl et al.
patent: 4901839 (1990-02-01), Johnson et al.

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