Fire escape – ladder – or scaffold – Scaffold external of shaft
Patent
1990-03-02
1991-05-21
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Scaffold external of shaft
182135, A01M 3102, A45F 322
Patent
active
050167332
ABSTRACT:
A sit and climb tree stand uses a wedging tree engagement bar to provide for positive support in the tree with minimal tree damage. A self-locking leveling feature is provided which allows the user to adjust the level when at the desired elevation.
REFERENCES:
patent: 4230203 (1980-10-01), Sweat
patent: 4316526 (1982-02-01), Amacker
patent: 4331216 (1982-05-01), Amacker
patent: 4942942 (1990-07-01), Bradley
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