Beds – Sofa bed – Reverting back
Patent
1974-08-09
1976-05-25
Nunberg, Casmir A.
Beds
Sofa bed
Reverting back
5 68, A61G 714
Patent
active
039582833
ABSTRACT:
An elevating and Trendelenburg mechanism for a hospital bed providing elevated Trendelenburg positions and positive latching of cooperating members. Two torque tubes pivotally attach to an elevating frame. Lift arms welded to the torque tubes support the frame at various elevations. A motor on the frame produces rotation of a yoke pivotally attached to one of the torque tubes. The yoke abuts a first drive arm rigidly attached to the tube to lift one end of the frame, and a second drive arm pivotally attached to the tube. A rod connects the second drive arm to a pivot plate as a second rod connects the pivot plate to a third drive arm welded to the other torque tube to lift the other end of the bed. When the frame raises to about its maximum height, one of two hooks on the frame may prevent the first or second drive arm from following a receding yoke, with the result that one end of the bed remains elevated while the other lowers. When not so engaged with the hooks, the second and third drive arms latch onto the yoke to prevent externally produced relative motion of the components.
REFERENCES:
patent: 3149348 (1964-09-01), Hillenbrand
patent: 3220020 (1965-11-01), Nelson
patent: 3222693 (1965-12-01), Pruim
patent: 3478372 (1969-11-01), Benoit et al.
patent: 3527111 (1950-10-01), Wadrich
patent: 3711876 (1973-01-01), Kirkland
patent: 3821821 (1974-07-01), Burst et al.
patent: 3840910 (1974-10-01), Damico
Adams James S.
Peck William H.
Tekulve Daniel R.
Hill-Rom Company, Inc.
Jambor Robert V.
Nunberg Casmir A.
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