Step assembly

Details Step assembly Step assembly

1985-10-04

1987-04-07

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Wall- or floor-attached

Independent rung or step

182228, E06C 904

Patent

active

046553185

ABSTRACT:
A manhole step assembly including a substantially U-shaped metal rod and a corrosion resistant covering molded about the rod is taught. The covering has a tapered portion formed at the free ends thereof, and the tapered portion has a roughed surface to increase the surface area of compression which is used to hold the step in place in the wall of a manhole shaft. A socket which may be cast in such a shaft is also disclosed.

REFERENCES:
patent: 1639210 (1927-08-01), Brown
patent: 1944384 (1934-01-01), West
patent: 3374859 (1968-03-01), Dobert
patent: 3434747 (1969-03-01), Nichols
patent: 3867864 (1975-02-01), Knohl
patent: 3974615 (1976-08-01), Ditcher
patent: 4100997 (1978-07-01), Peacock
patent: 4195709 (1980-03-01), Ginnotti
patent: 4365780 (1982-12-01), Williams

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