Inclinable stairway

Static structures (e.g. – buildings) – Stepped; e.g. – stair – Interconnected relatively movable components

Patent

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Details

14 695, E04F 1100

Patent

active

054541964

ABSTRACT:
An inclinable stairway for providing a staircase in one orientation and a ramp in another orientation comprising a pair of spaced, opposed, and upwardly extended side walls, each side wall having opposed and upwardly extended front and rear edges with an inclined edge extended upwardly from the front edge to the rear edge in a stair-step fashion; a pair of spaced, opposed and articulated upper support members, each upper support member having a lower end and an upper end with the upper end pivotally coupled to the top edge of a side wall, each upper support member comprised of a linkage of elongated bracing elements pivotally coupled end-to-end with the bracing elements in the linkage aligned along the inclined edge of an adjacent side wall to define a staircase configuration, and the bracing elements in the linkage linearly extended above an adjacent side wall from the top edge thereof to a location adjacent to the base plate to define a ramp configuration; a plurality of step members coupled to alternating and opposed pairs of bracing elements; and an actuator mechanism coupled to the upper support members, the actuator mechanism having one orientation for placing the upper support members and step members in the staircase configuration and another orientation for placing the upper support members and step members in the ramp configuration.

REFERENCES:
patent: 298212 (1884-05-01), Knight
patent: 4539781 (1985-09-01), McCoy

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