Collapsible stage

Details Collapsible stage Collapsible stage

1983-08-19

1986-04-08

Hafer, Robert A.

Undertaking

52183, 52 70, 108112, 3121402, 312258, A63J 300, E04B 1344

Patent

active

045807760

ABSTRACT:
Collapsible staging formed from modules each having end frames and side frames, the side frames incorporating vertical hinges allowing the side frames to be collapsed in a concertina fashion as the end frames are moved toward one another, so that the folded framework lies in a flat "sandwich" configuration. The frames support a platform which may be detached, or alternatively hinged to one end frame and also folded in a concertina fashion. Alternative configurations provide folding stairs and ramps.

REFERENCES:
patent: 2668331 (1954-02-01), Horn
patent: 2890089 (1959-06-01), Sanchez
patent: 2953244 (1960-09-01), Phillips
patent: 3035671 (1962-05-01), Sicherman
patent: 3434769 (1969-03-01), Salet
patent: 3525451 (1970-04-01), Asser
patent: 4122638 (1978-10-01), O'Brian et al.
patent: 4150630 (1979-04-01), Pokorny et al.
patent: 4289362 (1981-09-01), Kramer
patent: 4310207 (1982-01-01), Adams, Jr.

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