Hydraulically operated disappearing stairway

Details Hydraulically operated disappearing stairway Hydraulically operated disappearing stairway

1975-06-23

1976-10-12

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Door and ladder

Door operates ladder

182106, E04F 1104, A62B 106

Patent

active

039852024

ABSTRACT:
A unitary stairway (as distinguished from a sectional folding stairway) is adapted to assume an inclined operative position and an upper horizontal inoperative position above the ceiling of the room. Hydraulic means imparts longitudinal forces to the stairway to move it upwardly or downwardly, and rails carried by the stairway are engageable in guide rollers to guide the stairway between operative and inoperative positions. A wall switch is operable to energize a motor for driving a pump to generate power in the hydraulic means.

REFERENCES:
patent: 2931456 (1960-04-01), Harmon
patent: 3196981 (1965-07-01), Winnall
patent: 3774720 (1973-11-01), Hovey

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