Fire escape – ladder – or scaffold – Platform
Patent
1992-02-18
1994-03-22
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Platform
182113, 182128, E04G 314
Patent
active
052955575
ABSTRACT:
A safety and work platform is attachable to the top of a manhole casing during utility construction and provides for the safety of workers or persons upon the top of the casing. The platform provides for positive anchoring to the top of the casing with at least three securing points, at least one of which provides adjustability, and may include peripheral stanchions and guard rail for further protection. The interior of the casing is accessible through a an opening int he platform floor, which opening may be covered for safety when not in use. For additional safety, a belt and lanyard system may be used to secure a worker or other person to the platform. A method of use is also disclosed, with the platform first being installed upon a manhole casing and then the casing and platform lifted into position and installed together in order to preclude any persons from standing atop the casing before the platform is installed. When the necessary survey or other work has been completed, the platform may be removed for storage or other use.
REFERENCES:
patent: 1163798 (1915-12-01), Williams
patent: 1370166 (1921-03-01), Thiel
patent: 2393126 (1946-01-01), Stevenson
patent: 2623643 (1952-12-01), Seamans
patent: 3426659 (1969-02-01), Clarke et al.
patent: 4323140 (1982-04-01), Foscarini et al.
patent: 4407392 (1983-10-01), Lazzari
patent: 4973191 (1990-11-01), Dannhauser
Chin-Shue Alvin C.
Litman Richard C.
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