Elevatable scaffold

Details Elevatable scaffold Elevatable scaffold

1981-02-13

1983-07-05

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Platform with elevating or lowering means

182 63, 187 18, 254122, E04G 122, B66F 322

Patent

active

043913458

ABSTRACT:
An elevatable scaffold including a base and a platform connected therebetween by a lift assembly movable between a collapsed position and extended positions for elevating the platform above the base. The lift assembly may include a series of elongated structural assemblies each pivoted at one end and the middle thereof to some other structural assembly in the series; a cable passing substantially parallel with some of the structural assemblies and between the ends of mutually pivoted structural assemblies, one end of the cable being secured at the end of one of the structural assemblies; and a winch assembly mounted on the base and on which the other end of the cable is wound so that operation of the winch assembly may effect elevating of the platform by further winding of the cable thereon. The lift assembly may also include a sheave assembly mounted near the midpoint of one of the lowermost of the elongated structural assemblies engageable by the cable when the lift structure is in its collapsed position for providing mechanical advantage in initiating movement of the lift structure toward the extended positions.

REFERENCES:
patent: 3373844 (1968-03-01), Schafer

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