Modular staircase assembly

Details Modular staircase assembly Modular staircase assembly

1981-04-10

1983-09-27

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Means maintaining step lever on horizontally pivoted ladder

52183, 182 97, E06C 138, E06C 708, E06C 900

Patent

active

044063474

ABSTRACT:
A modular staircase assembly having a plurality of individual interconnecting upper and lower stringer members including a means for coupling upper and lower stringer members and a means for interconnecting in longitudinal alignment adjacent stringer members. Affixed to each set of upper and lower stringer members is a tread support for supporting a tread which is pivotally couplable to the associated upper and lower stringer sections so that when assembled and one of the upper and lower stringer sections is slid relative to the other the tread support moves so as to maintain a substantially horizontal position. Rotatable foot pads and mounting pads coupled to either end of the assembled structure accommodate changes in orientation of the staircase assembly.

REFERENCES:
patent: 298212 (1884-05-01), Knight
patent: 300395 (1884-06-01), Peterson
patent: 1555847 (1925-10-01), Hudson
patent: 2245825 (1941-06-01), Ross
patent: 3474882 (1969-10-01), Ernst
patent: 3493077 (1970-02-01), Doten
patent: 3713511 (1973-01-01), Hinkle
patent: 3731761 (1973-05-01), Glenn
patent: 4086980 (1978-05-01), Shortes

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