Steps for climbing trees

Details Steps for climbing trees Steps for climbing trees

1988-09-20

1989-09-19

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Wall- or floor-attached

Independent rung or step

182189, A63B 2700, A63B 2904

Patent

active

048672726

ABSTRACT:
A tree step is disclosed, including a substantially L-shaped step member of constant cross section. The upright portion of the L-shape is provided with an aperture adapted to hang over a lag screw. The aperture is elongated, with its lower aspect being wide enough to allow it to be passed over the head of the lag screw, and its uppper aspect being somewhat narrower and unable to pass over the head of the lag screw. In the preferred embodiment, at least one and preferably two anchoring lugs project inwardly from a lower portion of the upright portion of the L-shape, each lug having a contoured lower surface and a somewhat pointed upper surface. The upright portion of the L-shape extends somewhat below the horizontal portion, with an integral strut provided between the horizontal portion and the downward extension of the upright portion. The lower portion of the aperture is shaped to match the head of the lag screw.

REFERENCES:
patent: 2097562 (1937-11-01), Day
patent: 3498409 (1970-03-01), Meyer
patent: 4000788 (1977-01-01), Burgess
patent: 4415061 (1983-11-01), Meyers
patent: 4669575 (1987-06-01), Skyba
patent: 4700807 (1987-10-01), Kubiak

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