Beds – Sofa bed – Link supported unfolding
Patent
1979-03-26
1981-03-03
Nunberg, Casmir A.
Beds
Sofa bed
Link supported unfolding
5 29, A47C 1714
Patent
active
042532051
ABSTRACT:
A sofa or davenport having a foldable bed frame adapted to provide a seat when used as a sofa and a forwardly extending unfolded bed frame when used as a bed. The foldable frame includes pivotally interconnected head, body, intermediate and foot sections and a linkage operable to automatically control extension and contraction of the supporting legs and to control folding and unfolding of the interconnected sections between a fully extended, unfolded position wherein the sections extend over the sofa storage cavity and front rail; and a retracted position wherein the body, intermediate and foot sections are disposed substantially entirely below the plane of the top surface of the front rail of the sofa and the head section is disposed behind the back rest cushion of the sofa. The foldable bed frame is mounted to the sofa and supported by forward and rear support levers, the forward lever being pivotally connected at its lower end to an anchor plate secured to the sofa side frame and the rear lever being pivotable and slidable at its base in a generally horizontal slot in the anchor plate as the bed frame is moved between its retracted and its extended positions. The mounting and support system providing for a more balanced bed and eliminates the requirement for strong lift springs to operate the sleeper. The linkage is also operable to fully retract the front legs supporting the foot section of the bed frame when the foot section is raised to a generally vertical position during the folding operation to eliminate the possibility of pinching of the operator's hand. The unit also eliminates forward shifting of the frame when in the folded position and nearing the fully retracted position and reduces the possibility of sheet or blanket pinching.
REFERENCES:
patent: Re26671 (1969-09-01), Rogers
patent: 1809859 (1931-06-01), Meves
patent: 2315969 (1943-04-01), Krakauer
patent: 2329503 (1943-09-01), Young
patent: 3298041 (1967-01-01), Rogers
patent: 3321777 (1967-05-01), Pokorny
patent: 3416168 (1968-12-01), Pokorny
patent: 3747135 (1973-07-01), Barabas
patent: 3984853 (1976-10-01), Wong
patent: 4035852 (1977-07-01), Cycowicz et al.
Leggett & Platt Incorporated
Nunberg Casmir A.
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