Fire escape – ladder – or scaffold – Scaffold external of shaft
Patent
1989-10-13
1991-02-26
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Scaffold external of shaft
182133, A45F 326, A47C 910
Patent
active
049954750
ABSTRACT:
A hunter's portable tree stand that has an elongated platform assembly whose rear end is secured against the trunk of a tree. A pair of support arm assemblies have their front ends pivotally secured the front end of the platform assembly. A V-shaped clamping yoke passes around the trunk of the tree and its opposite ends are detachably connected to the respective rear ends of the support arm assemblies. A pair of upright brace members that pivot at the top, which the bottom is adjustable and secured to the rear end of the platform assembly and their top ends connected to the rear end of the support arm assemblies. The support arm assemblies have a unique structure which allows for adjustment of the angle that the platform assembly makes with the trunk of a tree even when the hunter is standing thereon.
REFERENCES:
patent: 3485320 (1969-12-01), Jones
patent: 3817350 (1974-06-01), Gray
patent: 3885649 (1975-05-01), Damron
patent: 4022292 (1977-05-01), Van Gompel
patent: 4230296 (1980-10-01), Staley
patent: 4321982 (1982-03-01), Strickland
patent: 4428459 (1984-01-01), Peck
patent: 4553634 (1985-11-01), Roberts
patent: 4722421 (1988-02-01), Hilbert
patent: 4726447 (1988-02-01), Gibson
patent: 4787476 (1988-11-01), Lee
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