Fire escape – ladder – or scaffold – Wall- or floor-attached – Single pole or strand
Patent
1996-09-20
1998-09-15
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Wall- or floor-attached
Single pole or strand
182 93, 182189, E06C 110
Patent
active
058066268
ABSTRACT:
A portable safety ladder for climbing trees is provided, comprising a single primary support member having first step; a single secondary support member having a second step, wherein the secondary support member is slidable relative to the primary support member; a locking mechanism operatively disposed between the primary support member and the secondary support member for selectively locking the position of the secondary support member relative to the primary support member; a single flexible strap on the primary support member for suspending the ladder module from the tree, wherein the flexible strap is placed in tension when weight is exerted on the ladder module; first and second stabilizers attached to the primary support member and the secondary support member, respectively, for stabilizing the ladder module against the tree, wherein the first and second stabilizers include surfaces which are caused to forcibly contact the tree when the flexible strap is placed in tension; and a safety loop connected to the flexible strap for allowing a secure attachment between the flexible strap and a coupling device on a climber, wherein the safety loop is constructed in a manner to support the weight of the climber.
REFERENCES:
patent: 2744674 (1956-05-01), Smith
patent: 3908791 (1975-09-01), Kleine
patent: 4592446 (1986-06-01), White
patent: 5165499 (1992-11-01), Bell
patent: 5277273 (1994-01-01), Grimes
patent: 5439072 (1995-08-01), Jenkins
patent: 5509499 (1996-04-01), Prejean
Loc-On, Catalog, Item No. 3, Mar. 17, 1994.
Chin-Shue Alvin C.
Delaune Warner J.
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