Fire escape – ladder – or scaffold – Scaffold external of shaft
Patent
1988-12-12
1990-07-24
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Scaffold external of shaft
182136, 108152, A45F 326, A01M 3102
Patent
active
049429426
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: 3493080 (1970-02-01), Ehlert
patent: 3664460 (1972-05-01), Zdroit
patent: 4168765 (1979-09-01), Ferguson
patent: 4230203 (1980-10-01), Sweat
patent: 4316526 (1982-02-01), Amacker
patent: 4331216 (1982-05-01), Amacker
patent: 4488620 (1984-12-01), Gibson
patent: 4549635 (1985-10-01), Early
patent: 4582165 (1986-04-01), Latini
patent: 4597473 (1986-07-01), Peck
patent: 4722421 (1988-02-01), Hilbert
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