Fire escape – ladder – or scaffold – Ladder and platform – Platform with ladder as support
Reexamination Certificate
1999-11-03
2001-06-12
Stodola, Daniel P. (Department: 3634)
Fire escape, ladder, or scaffold
Ladder and platform
Platform with ladder as support
C182S107000, C182S214000
Reexamination Certificate
active
06244383
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a ladder scaffold device. In particular, the invention relates to a ladder scaffold device that permits a single ladder to provide a scaffolding.
Scaffolding is a raised platform built as a support for workers and their tools and materials. A scaffolding provides an elevated, generally flat, surface so workers can move laterally, as well as vertically, while working at elevations. In contrast to ladders, which provide a worker with limited lateral range of movement often only as far as a worker can reach, a scaffolding provides enhanced lateral movement.
Scaffolding generally comprises a plurality of vertical, horizontal, and cross pieces that are interconnected to form a scaffolding frame. A platform is then joined to the scaffolding frame to define a work surface for workers. Often these scaffolding frame pieces, which are interconnected to form the scaffolding, require two or more individuals working in unison to assemble the scaffolding. Also, the raising of the platform up to the elevated portion of the scaffolding frame requires two or more individuals working in unison to lift, raise, and assemble the platform to the scaffolding frame. Accordingly, a single user may not be able to assemble a scaffolding for use.
A scaffolding platform, which is often a 2-by-10 or 2-by-12 board, can be connected between two ladders. A bracket is attached to each ladder and the board is hung from each bracket. The board then defines a platform for workers to move laterally. While a single person may attach a bracket to each ladder, the raising of a board to each bracket often requires two or more individuals working in unison to lift, raise, and assemble the board to the scaffolding frame. Accordingly, a single user is not be able to assemble this type of scaffolding for use.
Thus, a need exists for providing a scaffolding that a single person can assemble and use, without needing two or more individuals working in unison to lift, raise, and assemble the platform to the scaffolding frame.
SUMMARY OF THE INVENTION
A ladder scaffold device attaches to a ladder to define a scaffold and work area for a user of the ladder scaffold device. The ladder scaffold device is capable of being inserted into at least one rung of the ladder. The ladder scaffold device comprises a platform; a platform frame, in which the platform frame comprises a first back frame member, a second frame member, first and second side frame members; and a front frame member; and a plurality of support members. The plurality of support members comprises platform support members and additional support members, in which the platform support members are capable of being inserted into a rung of the ladder. The first back frame member extends into a rung of the ladder and the second back frame member extends into the rung of the ladder that the first back frame member extends. Each of the side support members is capable of being connected to one of the first and second back frame members. The front frame member is capable of being connected to the side frame members, and the first back frame member, second frame member, first and second side frame members, and front frame member define a platform frame to support the platform that defines a scaffold and work area for a user of the ladder scaffold device.
These and other aspects, advantages and salient features of the invention will become apparent from the following detailed description, which, when taken in conjunction with the annexed drawings, where like parts are designated by like reference characters throughout the drawings, disclose embodiments of the invention.
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Stodola Daniel P.
Thompson Hugh B.
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