Fire escape – ladder – or scaffold – Safety device for ground-supported ladder
Reexamination Certificate
1999-03-15
2001-08-21
Stodola, Daniel P. (Department: 3634)
Fire escape, ladder, or scaffold
Safety device for ground-supported ladder
C182S214000
Reexamination Certificate
active
06276490
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to ladder supports, more particularly to supports which facilitate movement of a ladder. The invention also relates to ladders which employ these supports.
BACKGROUND OF THE INVENTION
In the performance of their occupation, workmen such as painters, carpenters, roofers often must reposition a ladder against an inclined work surface such as inclined and vertical surfaces. Repositioning of a ladder, such as the extension member of an extension ladder, against these surfaces is a time consuming operation. The time wasted in repositioning the ladder adds substantial expense to labor intensive operations such as painting. This expense is also increased since two people are often needed to reposition long, relatively heavy ladders. Moreover, during reposition of the ladder requires moving the ladder away from the wall and maintaining the ladder in a balanced position until the ladder is again resting against the wall. If this balanced position is lost, the ladder can crash and cause property damage and injure the user. A need therefore exists for devices which facilitate repositioning of ladders, as well as ladders which can be readily positioned to a desired location and which overcome the disadvantages of conventional ladders.
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Law Offices of John A. Parrish
P&S Improvements
Stodola Daniel P.
Thompson Hugh B.
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