Fire escape – ladder – or scaffold – Scaffold supported internally on shaft
Patent
1989-06-12
1990-12-04
Chotkowski, Karen J.
Fire escape, ladder, or scaffold
Scaffold supported internally on shaft
249 20, 425 65, 182146, E04G 300
Patent
active
049747002
ABSTRACT:
An apparatus has been provided for vertically lifting or lowering a workman and/or materials at a construction site. This includes a rectangular platform having four corners for supporting the workman and/or material so that they can be vertically moved within an elevator shaft or the like. The platform has side edges positioned adjacent the side walls of the shaft. The platform can be raised or lowered by a crane. Recesses are provided in opposite side walls for receiving latches attached to the corners of the platform. The latches are locked in place when they are positioned within the recesses and can be retracted when the platform is to be raised and lowered. Also, leveling devices are provided at the corners of the platform for leveling the panels and devices are also provided for holding the panels in proper location prior to pouring the concrete.
REFERENCES:
patent: 1591907 (1926-07-01), Yager
patent: 1685012 (1928-09-01), Yager
patent: 3574905 (1971-04-01), Jing-Hong
patent: 3841596 (1974-10-01), Cull
patent: 3973885 (1976-08-01), Schmidt
Chotkowski Karen J.
Gates & Sons, Inc.
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