Fire escape – ladder – or scaffold – Ladder – Supporting surface compensating means
Patent
1986-10-06
1987-08-04
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Ladder
Supporting surface compensating means
182111, E06C 744
Patent
active
046839836
ABSTRACT:
Ladder leveling apparatus includes a frame portion, a support portion, a slider portion, a retainer portion and a positioner portion. The frame portion includes an elongated U-shaped section, the U-shaped section including a main section having a width slightly larger than the width of a ladder leg. The main section includes at least one longitudinal channel. The support portion includes a foot member pivotally connected to the ladder leg. The foot member includes a connector section and a base section. The slider portion includes a guide member disposed within the channel, the guide member having a width slightly less than the width of the channel and a thickness slightly greater than the thickness of the main section. At least one opening extends through the guide member. The retainer portion includes a plate member disposed over the guide member, the plate member having a width significantly larger than that of the channel. An opening through the plate member is aligned with the guide opening. A bolt member extends through the plate and guide openings and extends beyond the main section a distance sufficient to pass through an opening through the thickness of the ladder leg. An adjustable fastener is disposed on the free end of the bolt member securing the ladder leg to the guide and plate members. The positioner portion includes a transverse pin member extending through aligned openings in the side sections.
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patent: D230370 (1974-02-01), Kaye
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patent: 4423797 (1984-01-01), Batten
patent: 4607726 (1986-08-01), Davis
Baker Gerald G.
Machado Reinaldo P.
Urban Arthur L.
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