Fire escape – ladder – or scaffold – Wall- or floor-attached – Single pole or strand
Patent
1994-03-17
1995-08-08
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Wall- or floor-attached
Single pole or strand
182 93, 182207, E06C 110
Patent
active
054390729
ABSTRACT:
A modular ladder system for climbing trees is provided, comprising at least two ladder modules, each ladder module comprising a hollow, primary support member having an upper end and a lower end; a secondary support member, telescopingly slidable within the primary support member, having an upper end and a lower end; a first step attached to the lower end of the secondary support member; a second step attached to the lower end of the primary support member; a top step attached to the upper end of the primary support member; a spring-loaded lock operatively disposed between the primary support member and the secondary support member for locking the position of the secondary support member relative to the primary support member; at least two stabilizer brackets attached to the primary support member and the secondary support member for stabilizing the ladder module against the tree; and a strap and quick-release buckle attached to the primary support member for holding the ladder module to the tree.
REFERENCES:
patent: 3033309 (1962-05-01), Fugere
patent: 3995714 (1976-12-01), Brookes
patent: 4263983 (1981-04-01), Norton
patent: 4355701 (1982-10-01), Nicholson
patent: 4388983 (1983-06-01), Bartels
patent: 4592446 (1986-06-01), White
patent: 4844207 (1989-07-01), Andrews
patent: 5109954 (1992-05-01), Skyba
Chin-Shue Alvin C.
Delaune Warner J.
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