Fire escape – ladder – or scaffold – Ladder – Supporting surface compensating means
Reexamination Certificate
2006-03-28
2006-03-28
Chin-Shue, Alvin (Department: 3634)
Fire escape, ladder, or scaffold
Ladder
Supporting surface compensating means
C182S172000
Reexamination Certificate
active
07017711
ABSTRACT:
An extender and method for extending the leg of a ladder can both lengthen and stabilize the leg of the ladder. The extender includes a first channel shaped and dimensioned to receive the leg of the ladder. A second channel is shaped and dimensioned to receive the first channel. A first and second members pivotally connect the first channel to the second channel. The second channel may be selectively moved from a stowed position wherein the first channel is received by the second channel, to an extended position wherein the second channel outwardly projects from the first channel and resides in substantially co-linear relationship with the first member. A lock is selectively connectable between the first channel and the second channel to retain the second channel in the extended position. A retainer fixedly attaches the extender to a desired position along the leg of the ladder.
REFERENCES:
patent: 3556248 (1971-01-01), Brown et al.
patent: 4358233 (1982-11-01), Morris et al.
patent: 4798262 (1989-01-01), Margolies
patent: 5791437 (1998-08-01), Figliuzzi
patent: 172284 (1986-02-01), None
Chin-Shue Alvin
Masters Ted
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