Fire escape – ladder – or scaffold – Suspended platform
Patent
1994-02-14
1996-02-27
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Suspended platform
182142, 104112, E04G 310
Patent
active
054941326
ABSTRACT:
A frame and ladder assembly which includes an electrically conductive frame that is provided to engage two, generally parallel, aerially suspended, transmission conductors of a phase bundle and to be supported therefrom; within the frame a side opening structure which defines a cradle is provided, and in the cradle structure is provided means to engage the phase, such as a plurality of rollers with circumferential recesses, so that the frame can be repositioned along the phase similar to a carriage, without disengaging the frame from the phase; the ladder assembly comprises an insulated triangular ladder assembly which is attached at its vertex to the frame and hangs beneath it, permitting a line worker situated on the ladder assembly to easily perform maintenance and repairs on an energized phase directly above the ladder assembly; the ladder assembly is also comprised of pivotally connected ladder legs so that when the top of one of the two inclined side ladders is released from the frame, the other ladder legs of the assembly will pivot relative to one another and hang vertically, downwardly from the frame, affording the line worker a means of safely descending from the energized bundled conductor phase; a support cable with an insulating segment is releasably attached at one of its ends to a harness connected to the frame and at its other end to a lifting means, such as a helicopter, which can aerially transport the ladder and frame assembly to, and position it in supportable engagement with two of the transmission conductors in the side opening cradle of the frame.
REFERENCES:
patent: 301923 (1884-07-01), Reisdorff
patent: 1036481 (1917-08-01), Fredeen
patent: 3033978 (1962-05-01), Van Dusen
patent: 4163480 (1979-08-01), Highland
patent: 4478312 (1984-10-01), Kurteis
patent: 5297654 (1994-03-01), DeForges
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