Fire escape – ladder – or scaffold – Scaffold external of shaft
Patent
1989-08-31
1990-05-15
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Scaffold external of shaft
108152, A45F 326, A47C 910
Patent
active
049249720
ABSTRACT:
A portable tree seat has a flat rectangular frame with portions defining a longitudinal slot and an intersecting lateral slot. A brace formed of two bent rods joined by a triangular plate spike is rotatably mounted on the frame. A conical screw-ridged stud is affixed to the front of the frame and is adapted to be embedded in a tree trunk. A generally flat platform of rectangular plan is slidably mounted on the frame by a fastener running in the longitudinal and lateral slots. In the stored position the platform is parallel to and overlies the frame. In the extended position, the platform is perpendicular to the frame and serves as a seat.
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Konietzki Melvin J.
Machado Reinaldo P.
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