Fire escape – ladder – or scaffold – Wall- or floor-attached – Independent rung or step
Patent
1986-10-27
1987-06-02
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Wall- or floor-attached
Independent rung or step
2482174, A63B 2700
Patent
active
046695753
ABSTRACT:
A tree step aids persons to climb trees. The tree step comprises a handle and an arm that pivot between a closed side-by-side configuration and an open configuration of 90.degree.. The handle defines a rectangular opening for accepting the head of a lag screw. A concave recess in the opening proximate the handle free end is engageable with the screw shank. After a lag screw is driven into the tree, the handle opening is passed over the screw head and pulled downwardly so that the opening recess engages the screw shank. A leaf spring fastened to the handle has a U-shaped portion that captures the lag screw head when the screw shank is engaged in the concave recess to thereby prevent upward movement of the handle relative to the screw. The screw may be started into the tree by placing the screw to extend longitudinally from the handle with the screw head inserted in the opening and retained therein by the leaf spring. In that mode, the tree step acts as a screwdriver for starting the screw.
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