Conveyors: power-driven – Conveyor or accessory therefor specialized to convey people – By stairway having steps forming an endless member
Patent
1992-12-22
1994-08-16
Bidwell, James R.
Conveyors: power-driven
Conveyor or accessory therefor specialized to convey people
By stairway having steps forming an endless member
B66B 2312
Patent
active
053378792
ABSTRACT:
A tread element for a moving pavement or an escalator has a tread plate adapted to receive the person to be transported. The tread plate has a nosing secured to it along at least one of its longitudinal edges. In one embodiment, the nosing is secured to the tread plate by a longitudinal hook engaging the underside of the tread plate, a plurality of plugs passing through slots in the tread plate and secured underneath by stops such as a clamp-ring, and a plurality of centering projections which engage under a portion of the tread plate along the upper surface. The compact step is a single die-casting, which does not have to be completely removed and replaced in the event of breakage of the tread plate ribbing in the outer zone of the tread plate.
REFERENCES:
patent: 3334456 (1967-08-01), Naka
patent: 3861592 (1975-01-01), Fisher
patent: 4295556 (1981-10-01), Saito et al.
patent: 4321293 (1982-03-01), Naka
patent: 4321294 (1982-03-01), Naka
patent: 4362232 (1982-12-01), Saito et al.
patent: 4413719 (1983-11-01), White
patent: 4570781 (1986-02-01), Kappenhagen
Bidwell James R.
Inventio AG
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