Foldable support structure

Chairs and seats – Collapsible chair; i.e. – relatively folding bottom – back,...

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Details

297 17, 297 51, 297 53, 2974451, 2974522, 135125, 108115, 16371, A47C 400, A47C 510

Patent

active

059799765

ABSTRACT:
A foldable support structure having at least three interconnected rigid annular rings. The first ring is formed for service as a base. A second ring is formed for service as a load bearing support above the base. A third ring is formed for service as a connector to connect the first and second rings and to support the second ring above the first ring. A first releasable load-bearing hinge is mounted to hingedly join adjacent portions of the first and third rings. A second releasable load bearing hinge is mounted to hingedly join adjacent portions of the second and third rings, wherein the hingedly joined adjacent portions of the first and third rings being oppositely disposed from the hingedly joined adjacent portions of the second and third rings.

REFERENCES:
patent: 446249 (1891-02-01), Craig
patent: 887967 (1908-05-01), Schermerhorn
patent: 3279846 (1966-10-01), Morosini
patent: 4881299 (1989-11-01), Young et al.
patent: 5078056 (1992-01-01), McCauley
patent: 5435620 (1995-07-01), Cheng
patent: 5507719 (1996-04-01), Freeman
patent: 5676168 (1997-10-01), Price

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