Beds – Sofa bed – Link supported unfolding
Patent
1976-08-04
1978-02-21
Nunberg, Casmir A.
Beds
Sofa bed
Link supported unfolding
5 18B, 5 43, A47C 1714
Patent
active
040743713
ABSTRACT:
A motorized actuating mechanism for attachment to sofabeds, hide-a-beds and the like in order to make the opening and closing operation of said beds fully automatic. The mechanism is installed into the existing frame of the sofabed and a switch is installed on the outside of the sofa in order to activate the mechanism. The mechanism includes a main support frame which is attachable to the main frame of the sofa, a reversible drive motor mounted upon said main frame for actuating a threaded lead screw, a cross drive member driven by said lead screw in a reciprocating manner, double parallel slotted track members for constraining and guiding the cross drive member in a desired manner, a pair of linkage connectors, pivot arms, lower frame pivot arm mounts, upper frame cross rod, and upper frame mount for attachment to the bed portion of the sofa. The switch associated with the mechanism is spring biased to the off position and one of the two on positions drives the motor in a direction to open the bed and in the other on position drives the motor to operate the mechanism in order to close the bed. A large lever is provided for the switch which may easily be operated by the elderly and infirm.
REFERENCES:
patent: 2308592 (1943-01-01), Drexler et al.
patent: 2972753 (1961-02-01), Thomas
patent: 2982974 (1961-05-01), Bronstein
patent: 3233255 (1966-02-01), Propst
patent: 3458877 (1969-08-01), Edwards
Christian Services, Inc.
Jacobson Harvey B.
Nunberg Casmir A.
O#Brien Clarence A.
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