Supports – Brackets – Specially mounted or attached
Patent
1991-01-28
1992-06-09
Chotkowski, Karen J.
Supports
Brackets
Specially mounted or attached
248210, 182129, 182116, A47F 500
Patent
active
051200139
ABSTRACT:
A shelf assembly for a step ladder has two upright telescoping arms. Each arm has a lower tube and an upper tube telescoped into the lower tube to allow for a change in the length of the arm. This allows the shelf assembly to be vertically extended to raise a generally horizontal platform mounted on the upper ends of the arms to a desired height relative to the top of the step ladder. A folding bracket holds the shelf in a generally horizontal position. A ball joint mounted on a channel iron connects the lower end of each arm to a leg of the ladder. A linkage connects the middle of each arm to the ladder above the ball joint. A sleeve slides on each arm to provide adjustment of the linkage relative to the leg. The linkage has two connected links that allow the arms to be folded up against the ladder legs.
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patent: 4212371 (1980-07-01), Gaviorno, Jr.
patent: 4418793 (1983-12-01), Brent
patent: 4569449 (1986-02-01), Brent
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