Fire escape – ladder – or scaffold – Ladder with pivoted prop – Section extensible below prop pivot
Patent
1990-05-21
1991-03-19
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Ladder with pivoted prop
Section extensible below prop pivot
182209, E06C 122
Patent
active
050002899
ABSTRACT:
A folding step ladder of multipart construction that is extendable from a standard base height to a series of heights incrementally greater than the standard base height, and that is composed of four ladder elements; an upper-front element joined to an upper-rear element at a top hinge-step, a lower-front element slidingly joined to the upper-front element along its length, and a lower-rear element slidingly joined to the upper-rear element along its length. The lower elements captively slide along the length of their corresponding upper element and are capable of being held at a particular incremental extension by a latch arrangement that engages the upper element when downward force is exerted on the ladder.
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