Beds – Sofa bed – Link supported unfolding
Patent
1983-01-25
1985-03-19
Grosz, Alexander
Beds
Sofa bed
Link supported unfolding
5 28, 5 29, A47C 1704
Patent
active
045049874
ABSTRACT:
A folding sofa-bed or the like structure having a plurality of frame sections including a body section, pivotally interconnected in end-to-end relation for movement into an extended planar position to form a bed, and into a folded position to form a sofa-seat, and wherein the frame section and the body section in particular are provided with a flexible mattress supporting fabric having springs normally biasing the fabric and limiting it to a predetermined amount of sag under the weight of an occupant. Further sag control is obtained by utilizing one or more substantially rigid elongate transversely extending members which are normally supported by springs in a relatively relaxed and inactive position underlying the fabric of the body section, when the frame sections are in a seat forming position, but which are activated by a control linkage, responsive to movement of the frame sections to a bed forming position, whereby the rigid members will be moved into engagement with the mattress supporting fabric of the body section and its support springs stressed so as to provide a taut and more firm mattress support and thereby reduce the sag produced by the weight of the occupant, and tendency to sag towards the center of the bed.
REFERENCES:
patent: 2352989 (1944-07-01), Woller
patent: 2742653 (1956-04-01), Woller
patent: 3281871 (1966-11-01), Katz
patent: 3431567 (1969-03-01), Spitz et al.
patent: 3952344 (1976-04-01), Cycowicz et al.
patent: 4068328 (1978-01-01), Gerth
patent: 4173803 (1979-11-01), Kennedy
patent: 4381570 (1983-05-01), Schneider
patent: 4398312 (1983-08-01), Duff
Bedline Manufacturing Company
Grosz Alexander
Luong Vinh
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