Fire escape – ladder – or scaffold – Scaffold external of shaft
Patent
1991-10-18
1992-07-21
Mashado, Reinaldo P.
Fire escape, ladder, or scaffold
Scaffold external of shaft
108152, A01M 3102
Patent
active
051314967
ABSTRACT:
A tree seat comprises a horizontal beam having a rotatable seat at one end thereof and a vertical pin at the other end thereof that is removably journalled in a complementary vertical element that is secured to a tree by a pair of tree encircling straps.
REFERENCES:
patent: 3250235 (1966-05-01), McDonnell
patent: 4150733 (1979-04-01), Plummer
patent: 4307672 (1981-12-01), Shikimi
patent: 4730699 (1988-03-01), Threlkeld
patent: 4784239 (1988-11-01), Kirkman
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