Fire escape – ladder – or scaffold – Platform with elevating or lowering means
Patent
1979-04-13
1981-10-13
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Platform with elevating or lowering means
182132, E04G 120
Patent
active
042943329
ABSTRACT:
The scaffold unit comprises a pair of towers, each having a pair of rails held together by crossties. Each rail has a gear rack on the front face thereof. The towers are held in fixed lengthwise parallel alignment by cross braces removably attached to the sides of the rails facing each other. A self-elevating, platform-supporting carriage projects outwardly from each tower. The carriage has a frame which supports a pair of upright shoes, each defining a U-shaped channel for slidably receiving a rail therein. The shoes fit over and guide the carriage on the rails when the carriage is in motion. A shaft is rotatably mounted on the frame and carries a pair of gears which mesh with the racks through slots in the shoes. A controllable motor is adapted to rotate the shafts independently of, or in synchronism with, each other. Since the crossties and the lengthwise braces are connected between the faces of the rails which are free of the shoes, the carriages can be moved up or down to any desired level without having to first remove any of the crossties or cross braces.
REFERENCES:
patent: 2803503 (1957-08-01), Borgman
patent: 2904126 (1959-09-01), Meng
patent: 3438460 (1969-04-01), Solari
patent: 3610368 (1971-10-01), Johnson
patent: 3612219 (1971-10-01), Fortner
patent: 3848970 (1974-12-01), Hutchens
Breston Michael P.
Machado Reinaldo P.
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