Chairs and seats – Bottom or back – Framework
Patent
1986-01-30
1987-08-25
McCall, James T.
Chairs and seats
Bottom or back
Framework
52460, 297284, 297460, A47C 702
Patent
active
046888535
ABSTRACT:
An articulated structure for defining, when rendered rigid, a desired multi-curved surface, the structure being adjustable to permit the shape of the curved surface defined thereby to be varied at will. Such structures are particularly useful in the field of medical and other kinds of specialized seating, medical braces, and children's constructional toys.
The structure comprises an array of inter-connected, cooperating rings or links (12,28) and spiders (10). The radiating limbs of the spiders (10) have at or near their respective free ends jaw or other clamping means (22,24) in which cooperating parts (26) of the rings (12) are clamped by screw or other clamping means (18). The shape of the array is adjustable by relaxing the clamping means (18) of selected spiders (10) and then retightening them after the desired shape has been achieved by displacing the relevant members (10,12) of the array.
REFERENCES:
patent: 3055398 (1962-09-01), Tunnessen
patent: 3256785 (1966-06-01), Stammbach et al.
patent: 3310906 (1967-03-01), Clukes
patent: 3379472 (1968-04-01), Hilfiker
patent: 3565482 (1971-02-01), Blodee
patent: 3583091 (1971-06-01), Brockway
patent: 4347840 (1982-09-01), Adams
patent: 4367897 (1983-01-01), Cousins
patent: 4484778 (1984-11-01), Cousins
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