Folding staircase

Details Folding staircase Folding staircase

1998-02-03

1999-08-24

Chin-Shue, Alvin

Fire escape, ladder, or scaffold

Wall- or floor-attached

Ladder

182127, 280166, B60R 302

Patent

active

059413425

ABSTRACT:
A folding staircase comprises a plurality of step units each having a pair of horizontal link bars 41b, a pair of vertical link bars 42b that are pivotally coupled to corresponding the horizontal link bars, and a plate 20b that are connected between the horizontal link bars, wherein the ends of the horizontal link bars are pivotally combined with those of the adjacent vertical link bars to form a step portion, and a fixing unit for fixing the step portion to a vehicle.

REFERENCES:
patent: 1228271 (1917-05-01), Wells
patent: 3462170 (1969-08-01), Smith
patent: 4140327 (1979-02-01), Hackney

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