Beds – Sofa bed – Reverting back
Patent
1980-12-01
1983-08-16
Britts, Ramon S.
Beds
Sofa bed
Reverting back
5 68, A47C 1900
Patent
active
043983138
ABSTRACT:
Independently operable lifting mechanisms are provided at the head and foot ends of the fixed lower base frame of an adjustable hospital bed in order to facilitate independent height adjustment of the head and foot ends of the bed's movable upper frame. The lifting mechanisms are actuated by respective drive screws which may be rotated individually or simultaneously and in either direction to position the upper frame at any desired height and at any selected tilt angle. By turning only one drive screw, one end of the upper frame is elevated or lowered and the tilt angle will be changed. By rotating both drive screws simultaneously, the upper frame will be raised or lowered at a constant tilt angle. A manual control system provides for selective manual engagement of the lifting mechanisms and automatic disengagement thereof. When engaged, the lifting mechanisms may be manually actuated.
REFERENCES:
patent: Re27966 (1974-04-01), Burst
patent: 750370 (1904-01-01), Kammerer
patent: 1810317 (1931-06-01), Lasker
patent: 1985394 (1934-12-01), Anderson
patent: 2057517 (1936-10-01), Finnegan
patent: 2481477 (1949-09-01), Peery
patent: 3282584 (1966-11-01), Anderson
patent: 3333574 (1967-08-01), Harris
patent: 3465373 (1969-09-01), Wilson
patent: 4110856 (1978-09-01), Benoit et al.
B-W Health Products, Inc.
Britts Ramon S.
Trettel Michael F.
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