Fire escape – ladder – or scaffold – Ladder – Supporting surface compensating means
Patent
1988-05-09
1988-12-20
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Ladder
Supporting surface compensating means
2481884, E06C 744
Patent
active
047920173
ABSTRACT:
An elongated longitudinally adjustable load-supporting unit attachable to one end of one or both legs of a ladder or at least selected legs of a scaffold to permit using the ladder or scaffold on uneven surfaces, the load-supporting unit comprising an elongated externally-threaded member threadably received within an internally-threaded block-like member split into two similar halves which are pivotally connected adjacent one end and are urged into abutting relationship by spring means, and handle-like members extend respectively in similar directions from the halves of the block-like member and are operable to separate the internally-threaded portions of the block-like member sufficiently to permit free longitudinal movement of the externally-threaded member relative to the pivotally-connected halves of the block-like member. The load-supporting units are connectable to the lower ends of the sides of a ladder or legs of a scaffold between pairs of axially-aligned guide bearings which receive the elongated threaded members therethrough.
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Just C. Hercus
Machado Reinaldo P.
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