Hoisting apparatus for a manhole

Details Hoisting apparatus for a manhole Hoisting apparatus for a manhole

1990-06-15

1991-06-11

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Torso harness

182145, 212254, A62B 116, A62B 3500, B66C 2318

Patent

active

050224891

ABSTRACT:
A hoisting apparatus for a manhole adapted to be fastened to a guardrail of a manhole. The hoisting apparatus is vertically spaced above and extends across the manhole. The hoisting apparatus has two operating positions enabling it to raise an object out of the manhole, maneuver the object horizontally over a surface area adjacent to the manhole, and lower the object onto the adjacent surface area. Likewise, the hoisting apparatus can be utilized to raise an object off the adjacent surface area, maneuver the object over the manhole, and lower the object into the manhole. Furthermore, the hoisting apparatus is lightweight, portable, and mechanically non-complex.

REFERENCES:
patent: 4440261 (1984-04-01), Clark
patent: 4589523 (1986-05-01), Olson
patent: 4660679 (1987-04-01), Ostrobrod
patent: 4838439 (1989-06-01), Baziouk

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