Collapsible-expansible support assembly

Details Collapsible-expansible support assembly Collapsible-expansible support assembly

1994-07-29

1996-09-17

Chin-Shue, Alvin C.

Fire escape, ladder, or scaffold

Unitary foldable, rigid scaffold or ladder

182119, E04G 134

Patent

active

055559549

ABSTRACT:
A collapsible-expansible support assembly including a support platform arranged to be supported by spaced ladder frames pivotally joined by a collapsible-expansible truss assembly, adapted to be restrained and automatically locked in shielded outward, expansible movement, the support assembly being mounted on a unique set of casters and plugs.

REFERENCES:
patent: 3011586 (1958-10-01), Harvey, Jr.
patent: 3493208 (1968-04-01), Sato
patent: 3516425 (1970-06-01), Rigal
patent: 3616469 (1971-11-01), Injeski
patent: 3858683 (1975-01-01), Rachocki
patent: 4439052 (1984-03-01), Wallther
patent: 4534447 (1985-08-01), Champigny
patent: 4609071 (1988-09-01), Edwards
patent: 5086875 (1992-02-01), Shreve
patent: 5099953 (1992-03-01), Stegath

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