Chairs and seats – Having detachably interfitting parts or components; i.e.,... – Interfitted back and back frame
Patent
1974-12-30
1976-09-21
McCall, James T.
Chairs and seats
Having detachably interfitting parts or components; i.e.,...
Interfitted back and back frame
297248, A47C 700
Patent
active
039815366
ABSTRACT:
Backrest or back modules for stadium seating molded of plastic material are securely fastened along lateral edges to barlike support uprights by clips. Edges of adjacent backrest modules are inserted into upper and lower lips on the back supports; the opposed edges of the backrest modules are clamped by a single clip and abut a center stiffening rib on the supports. The clip has opposed horizontal reinforcing ribs which engage and clamp the brackrest module edges. The reinforcing ribs of the clip are chamfered so that as the clip is installed, the adjacent backrest module edges are drawn in or cammed snuggly against the center stiffening rib. Additional pressure applied by the fastener causes the reinforcing ribs of the clip to impress into the edges of the backrest modules causing surface cold-flow of the plastic material, thus eliminating both vertical and lateral movement.
REFERENCES:
patent: 2579795 (1951-12-01), Chaillot
patent: 3079198 (1963-02-01), Morgan et al.
patent: 3091881 (1963-06-01), Evans
patent: 3347593 (1967-10-01), Walkinshaw
patent: 3390765 (1968-07-01), Grant
patent: 3453794 (1969-07-01), Blok
patent: 3497262 (1970-02-01), Piretti et al.
patent: 3619004 (1971-11-01), McKernan et al.
patent: 3702204 (1972-11-01), Tipton et al.
Aschenbrenner Peter A.
McCall James T.
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