Fire escape – ladder – or scaffold – Platform with elevating or lowering means – Suspended
Patent
1993-04-16
1994-11-29
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Platform with elevating or lowering means
Suspended
182132, E04G 120
Patent
active
053681258
ABSTRACT:
The scaffolding includes a tower provided with equally spaced rungs and adapted to be secured to an adjacent building structure, an outer sleeve surrounding the tower and guided therealong and a work platform supported by the outer sleeve. The raising system includes an inner sleeve surrounding and guided on the tower inwardly of the outer sleeve, a pair of latching levers pivoted to the outer sleeve and latching onto the tower, a pair of hydraulic rams pivoted to the outer sleeve and to the inner sleeve and reciprocating the latter for up and down movement relative to the outer sleeve, and a pair of hooks pivoted on the inner sleeve to engage and disengage opposite rungs of the tower. To raise the outer sleeve and work platform, the rams are retracted while the inner sleeve is hooked to the tower. When the ram retracting stroke is completed, the latching levers latch the outer sleeve to the tower and the rams extend to raise the inner sleeve which is then hooked to a higher pair of opposite tower rungs.
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Chin-Shue Alvin C.
Lesperance Pierre
Martineau Francois
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