Fire escape – ladder – or scaffold – Platform with elevating or lowering means – Suspended
Patent
1979-01-29
1981-03-24
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Platform with elevating or lowering means
Suspended
182 2, 182187, 187 6, E04G 312, E04G 310, E04G 316
Patent
active
042574919
ABSTRACT:
An enclosed scaffold is suspended from a plurality of wire lines attached near the apex of a hemispheric dome surmounting the cylindrical sides of a containment structure, e.g. a tank. The scaffold is attached to the wire lines by hydraulically actuated cable gripping and climbing devices which may be manually or automatically controlled to raise and lower the scaffold. A wheel mounted car rides on the face of a buttress on the exterior of the containment structure wall. A boom mounted on the car is pivotally attached to the top of the scaffold. By means of a hydraulic thruster mounted on the car, the points of attachment of the scaffold to the boom can be moved away from or toward the buttress and wall as needed to provide room for the scaffold to hang level when it moves over the curved part of the structure. To balance torques on the scaffold tending to keep it from hanging level, guide channels carried by the lower part of the car engage rollers carried by the lower part of the scaffold, the roller position with respect to the guide channels being adjustable by screw jacks. The radial component of the force exerted on the scaffold by the wire lines keeps the car wheels in positive engagement with the buttress at all points above the springline. Below the springline, guide rails temporarily bolted to the buttress hold the car wheels against the buttress, thereby to maintain the scaffold level. The scaffold may be adapted to different buttress configurations and may be adapted to receive and suspend pup scaffolds for operating over the vertical part of the structure wall.
REFERENCES:
patent: 3095060 (1963-06-01), Reinhardt
patent: 4132287 (1979-01-01), Parolini
Cutler Earl G.
Presnall, Jr. Homer H.
Conley Ned L.
Machado Reinaldo P.
Prescon Corporation
Robinson Murray
Rose David Alan
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