A retractable staircase for ascending and descending between a lower elevation and an upper elevation, the lower elevation having a lower surface and the upper elevation having an upper surface, the retractable staircase, comprising:
- a main frame having a primary side, a secondary side and extending between a proximal end and a distal end;
- a frame pivot pivoting coupling said proximal end of said main frame to the upper surface;
- a staircase having a primary side, a secondary side and extending between a proximal end and a distal end;
- a plurality of bearings slidably coupling said staircase to said main frame;
- a drive supported above the upper surface;
- a tether coupled to said drive and said staircase;
- said drive causing a first lifting displacement in said staircase and said main frame for reducing the length of said tether and distancing said staircase from the lower surface;
- said first lifting displacement defining an ascending compound displacement by simultaneously causing an ascending staircase pivot displacement and an ascending frame pivot displacement relative to the frame pivot and causing an ascending slide displacement of said staircase relative to said main frame;
- said drive causing a second lifting displacement in said staircase and said main frame for reducing the length of said tether and distancing said staircase from the lower surface;
- said second lifting displacement defined by a lower stop engaging between said main frame and said staircase and terminating said ascending slide displacement of said staircase relative to said main frame and permitting only said ascending staircase pivot displacement and said ascending frame pivot displacement;
- said drive causing a retracted length in said tether for maintaining said staircase and said main frame in a generally parallel orientation with the upper surface;
- said drive causing a first descending displacement in said staircase and said main frame for increasing the length of said tether and distancing said staircase from the upper surface;
- said first descending displacement defined by said lower stop engaging between said main frame and said staircase and preventing a descending slide displacement of said staircase relative to said main frame and permitting only a descending staircase pivot displacement and a descending frame pivot displacement;
- said drive causing a second descending displacement in said staircase for increasing the length of said tether and distancing said staircase from the upper surface;
- said second descending displacement defining a descending compound displacement by simultaneously causing said descending staircase pivot displacement and said descending frame pivot displacement relative to said frame pivot and causing said descending slide displacement of said staircase relative to said main frame;
- and
- said drive causing an extended length in said tether for positioning said staircase in a generally adjacent orientation with the lower surface;
- said retractable staircase further including a door cover having a primary side, a secondary side and extending between a proximal end and a distal end;
- a door cover pivot pivoting coupling said proximal end of said door cover to the upper surface:
- a sliding link coupling said door cover to said main frame;
- and said door cover covering said main frame and said staircase during said retracted length in said tether and said staircase in said generally parallel orientation with the upper surface.