Fire escape – ladder – or scaffold – Scaffold external of shaft
Patent
1986-06-27
1987-05-26
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Scaffold external of shaft
108152, A01M 3102, A47C 910
Patent
active
046677739
ABSTRACT:
A tree stand having a platform and a folding seat member includes a platform supporting frame and brace which engage the tree on which the stand is mounted. The brace and an undergirding pivotally mounted strut include a plurality of unique, triangularly shaped spikes which pierce the bark of the tree. The triangular spikes have flat upper and lower surfaces which join and form a sharp point for piercing the tree. The upper surface enters the tree perpendicularly thereto and the lower surface at an angle acute to the upper surface. When weight is placed on the forward portion of the load bearing platform, the acute angle of the lower surface of the spike is caused to cut deeper into the tree and thus improve stability of the stand.
REFERENCES:
patent: 1206574 (1916-11-01), Miller
patent: 3338332 (1967-08-01), Brantly
patent: 4113058 (1978-09-01), Kobosh
patent: 4236602 (1980-12-01), Leggett
patent: 4331216 (1982-05-01), Amacker
patent: 4475627 (1984-10-01), Eastridge
patent: 4484660 (1984-11-01), Baynum
patent: 4549635 (1985-10-01), Early
patent: 4552246 (1985-11-01), Thomas
patent: 4552247 (1985-11-01), Purdy
patent: 4553634 (1985-11-01), Roberts
patent: 4579198 (1986-04-01), Lee
Garmon Judith E.
Machado Reinaldo P.
Rhodes Charles R.
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